Journal of Health Research in Community

Journal of Health Research in Community

Basic info

  • Publisher: Mazandaran University of Medical Sciences
  • Country of publisher: iran, islamic republic of
  • Date added to EuroPub: 2019/Nov/22

Subject and more

  • LCC Subject Category: Medicine, Health and Wellness
  • Publisher's keywords: Social Determinants of Health, Health and Lifestyle, Health and Environmental Hygiene, Health Policies and Management
  • Language of fulltext: persian
  • Time from submission to publication: 5 weeks

Publication charges

  • Article Processing Charges (APCs): No
  • Submission charges: No
  • Waiver policy for charges? No

Open access & licensing

  • Type of License: CC BY
  • License terms
  • Open Access Statement: Yes
  • Year open access content began: 2015
  • Does the author retain unrestricted copyright? True
  • Does the author retain publishing rights? True

Best practice polices

  • Permanent article identifier: DOI
  • Content digitally archived in: Nopolicy
  • Deposit policy registered in: None

This journal has '252' articles

Parental Knowledge, Attitudes, and Practices on Antibiotic Use in Children under 12 Years of Age Who Referred to Khatam-al-Anbia Hospital in Shahrood, Iran during 2017

Parental Knowledge, Attitudes, and Practices on Antibiotic Use in Children under 12 Years of Age Who Referred to Khatam-al-Anbia Hospital in Shahrood, Iran during 2017

Authors: Seyyede Zahra Sadati, Hossein Haratipoor, Maryam Farjamfar
Year: 2019, Volume: 5, Number: 1
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Abstract

Introduction and purpose: Over-consumption of antibiotics in the community has caused more concern worldwide about increasing microbial resistance. Several factors are associated with excessive consumption of antibiotics. This study investigated the level of parental knowledge, attitudes, and practices regarding antibiotic use and the factors influencing it in children under the age of 12 years who referred to Khatam-al-Anbia Hospital in Shahrood, Iran. Methods: Totally, 97 parents of children who were under 12 years of age were enrolled in this descriptive cross-sectional study during 2017. The data were collected using parental knowledge, attitudes, and practices of antibiotic use questionnaire in children younger than 12 years of age. Moreover, the data were analyzed using SPSS software (version 20). P-value less than 0.05 was considered statistically significant. Results: According to the results, the parental levels of knowledge were poor (n=11, 11.3%), moderate (n=23, 23.7%), and good (n=63, 64.9%). Moreover, the mean score of parental knowledge level was obtained at 8.7±2.66. In addition, the attitude levels were moderate and good in 27 (27.8%) and 70 parents (72.2%), respectively. The mean score of parental attitude level was estimated at 7.97±1.35. Furthermore, regarding the parental practice domain, 8 (8.2%), 30 (30.9%), and 59 (60.8%) parents were considered poor, moderate, and good, respectively. The mean score of parental practice level was determined at 5.8±2.07. It should be noted that parents with higher levels of education and previous history of infectious diseases in the family showed higher levels regarding knowledge, attitudes, and practices in terms of antibiotic use. Conclusion: The improvement of parental awareness and knowledge levels about antibiotic use will increase the level of attitude, decrease the demand for antibiotics, improve the practices of parents, and reduce the use of antibiotics, thereby decreasing the growth of antibiotic resistance in the community.

Keywords: Antibiotic, Attitude, Awareness, Parents, Practice
Quantitative Evaluation of Medical Waste and Their Sterilization Equipment in Hospitals of Iran University of Medical Sciences in 1394

Quantitative Evaluation of Medical Waste and Their Sterilization Equipment in Hospitals of Iran University of Medical Sciences in 1394

Authors: Ahmad Jonidi Jafari, Niloufar Bahari, Aliakbar Nowroozi
Year: 2019, Volume: 5, Number: 1
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Abstract

Introduction and purpose: The efficient hospital waste management requires a detailed knowledge of the quantity and type of medical centers generated waste. The most important factor in planning and management of hospital waste is the estimation of the generated waste. It is worth mentioning here that modern methods of waste disposal are necessary, due to the harmful potential of medical waste. Methods: A total of 62 hospital under the supervision of Iran University of Medical Science were studied. The data were obtained from waste self-reporting form, the results of biological and chemical tests, and calibration result of medical waste sterilization equipment. It should be noted that the hospitals were divided into three groups of state (H1), private(H2), and the other hospitals (H3) to facilitate the process of study. Thereafter, the obtained data were analyzed in Excel 2013. Results: waste generation rate (kg/bed. Day) is 4.09, 4.12, and 4.9, in state, private, and the other hospitals, respectively. Based on the results, all hospitals except the four psychiatry hospitals were equipped with the medical waste sterilization equipment (e.g., autoclave, hydroclave, chemiclave, and dry heat). In addition, all H1, H3, and 98% of H2 used biological indicators. Furthermore , all H2, H3 and 91.6% of H1, used chemical indicators. Biological supervision of the hospitals showed the positive and desired results with indicating no microbial growth in 76.4%, 86.4%, and 56.2% of H1, H2, and H3, respectively. Conclusion: According to the results of the research and other similar studies, the process of waste generation and separation, as well as the performance of the waste sterilization equipment need further optimization.

Keywords: Chemical and biological indicators, Hospital waste generation per capita, Infectious waste, Infectious waste sterilizer equipment
Investigation of  Relationship between Intellectual Capital and Social Responsibility with Ethical Behavior of Faculty Members

Investigation of Relationship between Intellectual Capital and Social Responsibility with Ethical Behavior of Faculty Members

Authors: Jamshid Bahmaei, Rita Rezaee, Mohammad Khavasi, Rana Hamedpour
Year: 2019, Volume: 5, Number: 1
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Abstract

Introduction and purpose: Intellectual capital is the key factor in value creation for organizations. Social responsibility means taking some measures for the improvement of the community welfare beyond the interests of the organization and legal requirements. To researchers, ethical behavior in the organization means acting in ways consistent with the ethical values of the organization. In this regard, this study was conducted to determine the relationship between intellectual capital and social responsibility and its relationship with the professional ethics of faculty members of the Faculty of Medical Sciences of Abadan, Iran. Methods: This research was descriptive-correlational. The required data were collected from 78 people using census method. To this end, information was collected by researchers using intellectual capital, social responsibility, and ethical behavior questionnaires. Finally, the data were analyzed using SPSS software, Pearson correlation coefficient, and regression tests. Results: There was a positive and significant relationship between intellectual capital and all its subscales with the ethical behavior of the faculty members (P<0/05). According to the results, all components of intellectual capital were able to predict ethical behavior. Furthermore, a positive and significant relationship was found between social responsibility and all its subscales with the ethical behavior of faculty members and all components of social responsibility were able to predict ethical behavior. Conclusion: The faculty members with high intellectual capital and social responsibility will show more ethical behavior in educational and research activities. Therefore, they will improve the level of the university and the scientific community of the country.

Keywords: Ethical behavior, Intellectual capital, Social responsibility
Investigation of the Efficiency of Coagulation Process for Ciprofloxacin Antibiotic Removal from Aqueous Solution

Investigation of the Efficiency of Coagulation Process for Ciprofloxacin Antibiotic Removal from Aqueous Solution

Authors: Zohreh Asad, Shahin Ahmadi
Year: 2019, Volume: 5, Number: 1
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Abstract

Introduction and purpose: Antibiotics are a large group of pharmaceutical compounds which are stable in the environment. When they are not being removed during refinery wastewater treatment, they enter receiving water bodies which lead to environmental pollution. This study aimed to investigate the efficiency of alum and poly aluminum chloride coagulants in the removal of ciprofloxacin antibiotic from aqueous solutions. Methods: The batch experiments were conducted in this laboratory study. Optimum conditions of pH parameters, slow mixing time, initial concentration of ciprofloxacin, alum concentration, poly aluminum chloride concentration, and turbidity were determined during the process of coagulation on synthetic wastewater using the jar test. Results: Maximum removal efficiency of ciprofloxacin for both coagulants with pH=6 were determined at coagulant concentration of 20 mg/l and ciprofloxacin concentration of 25 mg/L. Moreover, it was estimated at 65% and 64% for poly aluminum chloride and alum, respectively. Conclusion: As the findings indicated, poly aluminum chloride was more efficient than alum for ciprofloxacin removal. Therefore, the coagulation process can be used as an efficient method to remove antibiotics from aqueous solutions.

Keywords: Alum, Antibiotics, Ciprofloxacin, Coagulation, Poly aluminum chloride
Evaluation of Hospital Treated Wastewater on Seed Germination and Plant Growth Indices

Evaluation of Hospital Treated Wastewater on Seed Germination and Plant Growth Indices

Authors: Fathollah Gholami-Borujeni, Atefeh Zahedi, Masoumeh Sheikhi
Year: 2019, Volume: 5, Number: 1
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Abstract

Introduction and purpose: Effluent of wastewater treatment plant after reaching to the standards is commonly used as the source of irrigation in agriculture in many developing and developed countries. Before using wastewater in agriculture, it is better to evaluate the phytotoxic effects of wastewater on crops. Therefore, the main objective of this study was to evaluate the impacts of raw and treated hospital wastewater on seed germination and growth parameters of selected vegetable species. Methods: In this study, the toxicity effects of different concentrations (i.e., 0%, 10%, 30%, 50%, 70%, and 10% v/v) of raw and treated hospital wastewater on seed germination, root growth, as well as stems and leaves of three vegetables, namely Coriandrum sativum, Anethum graveolens, and Lepidium sativum, using Petri dish cultivation method were studied through three replications in a completely randomized design. The parameters, such as germination percentage, germination rate index, and growth parameters (i.e., the length of the root, shoot, and leaf), were calculated after 0-10 days. In addition, Biochemical Oxygen Demand, COD (Chemical Oxygen Demand), Toxic Shock Syndrome, pH, Total Dissolved Solids, EC (Electrical Conductivity), free chlorine residual, and microbial quality of wastewater were analyzed in the present study. Results: Obtained results showed that no significant relationship was observed between the control, as well as raw and treated wastewater samples, in seed germination capacity. According to the finding, the length of the root, shoot, and leaf increased with an increase in the concentration of wastewater. Therefore, hospital wastewater had no negative effect on the seed germination of the plants. Conclusion: Hospital wastewater can contain hazardous substances, such as pharmaceutical residues, chemical hazardous substances, pathogens, and radioisotopes. In this regard, it is required to investigate more qualitative parameters regarding the reuse of hospital wastewater in agriculture.

Keywords: Hospital wastewater, Reuse, Seed germination, Vegetable seeds
The Effect of Educational Intervention Based on the Theory of Planned Behavior on the Promotion of  Nutritional Behaviors of Pregnant Mothers

The Effect of Educational Intervention Based on the Theory of Planned Behavior on the Promotion of Nutritional Behaviors of Pregnant Mothers

Authors: Fariba Etezadi, Alireza Ghaemi, Zahra Jalili
Year: 2019, Volume: 5, Number: 1
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Abstract

Introduction and purpose: Proper nutrition during pregnancy is of utmost importance in the maintenance of maternal and fetal health. This study aimed to determine the effect of educational intervention based on the theory of planned behavior in the promotion and nutritional behaviors of pregnant women referring to comprehensive health centers in Amol, Iran in 1397. Methods: This semi-experimental interventional research was performed on 72 pregnant women in the first trimester of pregnancy who were randomly assigned to intervention and control groups. The instrument utilized in this study was a questionnaire developed by the researcher and used after the validity and reliability confirmation. The P-value <0.05 was considered statistically significant. Results: The results showed that there was a significant difference between the mean scores of knowledge, attitude, abstract norm, perceived behavior control, behavioral intention, and the behavior of the experimental group after the intervention in educational intervention group (P <0.001). Conclusion: Based on the results of this study, educational intervention based on planned behavioral theory was effective in the promotion of nutritional behaviors of pregnant women. Educational intervention of this theory could be a appropriate theoretical framework for the design and implementation of interventions to promote nutritional behavior of pregnant women.

Keywords: Comprehensive health centers, Nutritional behaviors, Planned behavioral theory, Pregnant women
Comparison of Novel Ergonomic Postural Assessment and Rapid Upper Limb Assessment Methods for Evaluating the Posture of Employees in an Agricultural Equipment Manufacturing Company in 2017

Comparison of Novel Ergonomic Postural Assessment and Rapid Upper Limb Assessment Methods for Evaluating the Posture of Employees in an Agricultural Equipment Manufacturing Company in 2017

Authors: Seyed Taghi Mirmohammadi, Hadi Mahmoodi Sharafe, Nouraddin Mousavinasab, Abdollatif Raufinia
Year: 2019, Volume: 5, Number: 1
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Abstract

Introduction and purpose: The observational methods are the most common techniques for postural assessment. Afterwards, preventive interventions for musculoskeletal disorders are performed as the best strategy. Therefore, the most important point in the first phase is the selection of suitable assessment method. With this background in mind, this study was conducted to evaluate the correlation and agreement between the results of Novel Ergonomic Postural Assessment (NERPA) and Rapid Upper Limb Assessment (RULA) methods to determine the appropriate technique. Methods: In the current study, 41 postures were investigated following the exclusion of similar postures. Photos of postures were prepared and assessed according to the instructions of NERPA and RULA methods by an assessor. The score of each organ and the final risk level of both methods for right and left sides were evaluated by the Wilcoxon method. Moreover, the results were compared using the Spearman correlation coefficient and the Kappa coefficient. Results: Our findings indicated that higher scores for risk levels 1 and 2 were obtained by NERPA method, while the RULA score was higher for levels 3 and 4. It should be noted that the mentioned difference was significant for the right side. In terms of the scores of body organs, there was a significant difference in the wrist score. The results of analyses demonstrated that the correlation coefficient of NERPA and RULA methods for left and right sides was 0.605 and 0.697, respectively. Furthermore, the Kappa agreement coefficient was revealed as 0.206 and 0.401 for left and right sides, respectively. Conclusion: According to the results of the present study, NERPA method identified the low risks better than RULA technique. As a result, considering the involvement of the freedom degree of body organs in neutral zone in NERPA method and the significant difference between the two techniques, NERPA application is recommended. On the other side, although the two methods did not have a good agreement, the results showed that they were correlated. Therefore, both methods can be used in industries similar to the current investigation.

Keywords: Musculoskeletal disorders, NERPA, Postural assessment, RULA
Monitoring and Modeling of the Concentration and Quality Index of Dust Particles in the Air of Gorgan City in 1396

Monitoring and Modeling of the Concentration and Quality Index of Dust Particles in the Air of Gorgan City in 1396

Authors: Mohammad Reza Khani, Yousef Dadban Shahamat, Zeynab Shahidi, Narges Sadeghi Moghaddam
Year: 2019, Volume: 5, Number: 1
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Abstract

Introduction and purpose: Previous epidemiological studies suggested a close correlation between suspended particles and the prevalence of respiratory diseases, cardiovascular problems, cancer, and mortality. Moreover, it was reported that the city space contains pollutions of motionless and moving sources. Therefore, the aim of this study was to determine the concentration and release status of PM10 and PM2.5 particles in the air of Gorgan, Iran in 2016-2017 and to provide effective solutions. Methods: In this descriptive cross-sectional study, the concentration of air pollutants in Gorgan was measured at eight stations in different parts of the city for one year during July 2016-June 2017. Afterwards, the results of monthly PM2.5 and PM10 measurements by the portable device were modeled following the calculation of the quality index and estimation of their effect on health in the Geographic Information System using the Air Quality Index (AQI) Calculator software. In addition, the measurements were compared with national and international standard values. Furthermore, solutions were provided for reducing pollution. Results: Our findings demonstrated that the highest amount of PM2.5 and PM10 were recorded in December (116 and 76 μg/m3) and the lowest was in April (40 and 34 μg/m3). The results of one-way analysis of variance revealed a significant difference in the mean concentrations of the two particles between months. According to the results of this study, air inversion in cold seasons was effective in the concentration of these pollutants. The annual mean of PM10 and PM2.5 was reported as 41 and 30 μg/m3, respectively. The latter means were lower and higher than the EPA standards of 50 and 12 μg/m3, respectively. Conclusion: The results of the current investigation showed that the highest AQI was related to PM2.5 in the central regions of the city, Municipality Square, and Mazandaran Square. In addition, the highest PM10 pollution was measured in the central and southern parts of the city. This could be attributed to the high density of cars, which is the most important factor in the production of particles in cities.

Keywords: Air pollution, Air quality index, Dust particles, Gorgan
ارزیابی ارگونومیکی جراحان حین انجام جراحی های باز و لاپاراسکوپی در یکی از بیمارستان های عمومی شهر تهران و ارائه راه کارهای اصلاحی

ارزیابی ارگونومیکی جراحان حین انجام جراحی های باز و لاپاراسکوپی در یکی از بیمارستان های عمومی شهر تهران و ارائه راه کارهای اصلاحی

Authors: Farin Fatemi, Mahdi Mohammadiyan
Year: 2018, Volume: 4, Number: 1
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Abstract

مقدمه و هدف: جراحان با توجه به ماهیت شغلی خود در معرض ریسک فاکتورهای اختلالات اسکلتی- عضلانی متعددی قرار دارند. در این ارتباط، هدف از پژوهش حاضر ارزیابی ارگونومیکی جراحان حین انجام جراحی های باز و لاپاراسکوپی و ارائه راه کارهای کاربردی ارگونومیک محیط برای کاهش ریس کفاکتورهای اختلالات اسکلتی- عضلانی در جراحان بود.روش کار: پژوهش توصیفی- مقطعی حاضر در یکی از بیمارستان های عمومی شهر تهران انجام شد. ابتدا 85 مورد جراحی (باز و لاپاراسکوپی) با استفاده از دو روش Rapid Upper Limb Assessment) RULA) و Strain Index) SI ) مورد ارزیابی قرار گرفتند و پرسشنامه نوردیک با استفاده از نقشه بدن توسط جراحان تکمیل گردید. در بخش بعدی مطالعه، تجهیزات و شرایط محیطی اتاقهای جراحی مورد بررسی قرار گرفت. در نهایت، داده ها توسط نرم افزارهای Excel و SPSS تجزیه و تحلیل گردیدند.یافته ها: براساس یافته ها بیشترین ناراحتی ها در نواحی کمر و گردن به ترتیب با 4/ 76 و 7/ 64 درصد گزارش شده بودند. جراحی لاپاراسکوپی در روش RULA با 72 درصد و در روش SI با 86 درصد بیشترین سطح ریسک اختلالات اسکلتی- عضلانی را به خود اختصاص داد. آزمون های تحلیلی نیز اختلاف معناداری را به لحاظ آماری بین نمره پوسچر گردن در جراحی های لاپاراسکوپی نسبت به جراحی های باز در روش RULA نشان دادند ( 05 / P<0 ). شایان ذکر است که در روش ارزیابی SI بین نمره پوسچر دست/ مچ در جراحی لاپاراسکوپی در مقایسه با جراحی های باز اختلاف معناداری مشاهده شد(p<0/05). نتیجه گیری: به طور کلی، در پژوهش حاضر امتیاز ریسک جراحی های لاپاراسکوپی بالاتر از جراحی باز به دست آمد؛ البته مغایرت های بسیاری در دستورالعمل های ارگونومیکی در هر دو نوع جراحی مشاهده گردید که بخشی از این مغایرت ها مرتبط با جراحان و بخش دیگر ناشی از تجهیزات غیر ارگونومیکی بود؛ از این رو، راه کارهای اصلاحی ارگونومیکی با اولویت جراحی های لاپاراسکوپی پیشنهاد می گردد.

Keywords: اختلالات اسکلتی- عضلانی, جراحی باز, جراحی لاپاراسکوپی
An Ergonomic Evaluation of Surgeons during Laparoscopic and Open Surgery in a General Hospital in Tehran, Iran, and Presentation of Corrective Measures in 2016

An Ergonomic Evaluation of Surgeons during Laparoscopic and Open Surgery in a General Hospital in Tehran, Iran, and Presentation of Corrective Measures in 2016

Authors: Farin Fatemi, Mahdi Mohammadiyan
Year: 2018, Volume: 4, Number: 1
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Abstract

Introduction and purpose: Surgeons are exposed to different risk factors for musculoskeletal disorders (MSDs) due to their occupational nature. The aim of the current research was to investigate the ergonomics of surgeons during laparoscopic and open surgeries and present applicable ergonomic strategies for the reduction of MSDs risk factors among this population.Methods: This cross-sectional study was conducted on 85 surgeons, performing laparoscopic and open surgeries, in one of the general hospitals of Tehran, Iran, in 2016. The participants were assessed by means of two ergonomic assessment methods, namely Rapid Upper Limb Assessment (RULA) and Strain Index (SI). Additionally, they filled out the Nordic body map questionnaire. Finally, the equipment and environmental conditions of the operation rooms were also evaluated. The data were analyzed using Excel and SPSS software.Results: The highest MSD prevalence rate was related to the lumber (76.4%) and neck (64.7%). Furthermore, laparoscopic surgery had the upper risk level of MSDs; in this regard, this risk was obtained as 72% and 86% by RULA and SI methods, respectively. Furthermore, among the  laparoscopic surgeries, neck posture risk level was significantly different from that of the open surgeries in the RULA approach (P<0.05). Likewise, in the SI method, the risk level of the wrist in laparoscopic surgeries was significantly different from that of the open surgeries (P<0.05).Conclusion: As the findings of the present study indicated, the risk level of laparoscopic operation was higher than that of the open surgeries. However, much non-compliance in terms of the surgeons and non-ergonomic equipment was observed with ergonomic instructions in both of the mentioned operations. Therefore, it is suggested to adopt ergonomic corrective measures with the priority of laparoscopic surgeries in order to prevent MSDs among surgeons.

Keywords: Laparoscopic surgery, Musculoskeletal disorders, Open surgery
تعیین کارایی، ایزوترم و سینتیک جذب رنگ Sunset Yellow FCF از محلول آبی توسط کربن فعال گرانوله

تعیین کارایی، ایزوترم و سینتیک جذب رنگ Sunset Yellow FCF از محلول آبی توسط کربن فعال گرانوله

Authors: Esrafil Asgari, Fathollah Gholami-Borujeni, Rahim Aali
Year: 2018, Volume: 4, Number: 1
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Abstract

مقدمه و هدف: رنگ SY) Sunset Yellow FCF ) یکی از آلاینده های خطرناک رنگ آزوی موجود در پساب فرایندهای مواد غذایی است. در این ارتباط، در پژوهش حاضر کارایی کربن فعال گرانوله (GAC: (Granular Activated Carbon  در جذب رنگ Sunset Yellow FCF از محلول آبی و همچنین ایزوترم و سینتیک های جذب مورد ارزیابی قرار گرفت. روش کار: پژوهش حاضر یک مطالعه تجربی- آزمایشگاهی می باشد که در آن به بررسی تأثیر پارامترهای مستقل مانند pH ، زمان تماس، دوز جاذب و غلظت اولیه بر درصد حذف رنگ Sunset Yellow FCF پرداخته شده است. جذب نمونه ها توسط دستگاه اسپکتروفتومتر در طول موج 480 نانومتر با سه بار تکرار انجام شد. در این پژوهش از مدل های ایزوترم جذب Langmuir و Freundlich برای مدل سازی ریاضی فرایند جذب رنگ Sunset Yellow استفاده گردید. معادلات سینتیک شبه درجه اول و شبه درجه دوم نیز برای آنالیز داده های آزمایش مورد استفاده قرار گرفتند.یافته ها: زمان ماند، نقش مهم تری نسبت به pH و غلظت های اولیه رنگ در فرایند جذب دارد و افزایش زمان ماند از 5 تا 50 دقیقه باعث افزایش راندمان حذف رنگ از 62 به 85 درصد می شود. از سوی دیگر، هنگامی که دوز جاذب از 1 تا 8 گرم افزایش می یابد، راندمان حذف رنگ از 65 به 82 درصد افزایش پیدا می کند. شایان ذکر است که فرایند جذب از ایزوترم جذب مدل Freundlich با ضریب همبستگی 9998 / 0= r2 و از مدل سینتیکی شبه درجه یک با ضریب همبستگی 9975 / 0= r2 تبعیت می کند. نتیجه گیری: مطابق با نتایج می توان گفت که رنگ Sunset Yellow به طور قابل توجهی با جاذب کربن فعال گرانوله جذب می گردد؛ به طوری که می توان از آن به عنوان روشی بسیار مؤثر برای حذف رنگ Sunset Yellow از محلول های آبی استفاده کرد.

Keywords: کربن فعال گرانوله, جذب, رنگ, Sunset Yellow FCF
Determination of the Efficiency, Isotherm, and Kinetics of Color Absorption of Sunset Yellow FCF from Aqueous Solution by Granular Activated Carbon

Determination of the Efficiency, Isotherm, and Kinetics of Color Absorption of Sunset Yellow FCF from Aqueous Solution by Granular Activated Carbon

Authors: Esrafil Asgari, Fathollah Gholami-Borujeni, Rahim Aali
Year: 2018, Volume: 4, Number: 1
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Abstract

Introduction and purpose: Sunset yellow FCF is a hazardous azo dye pollutant found in food processing effluent. In this study, the efficiency of granular activated carbon on the absorption of sunset yellow FCF from aqueous solution, as well as isotherm and absorption kinetics were evaluated.Methods: This experimental laboratory study was conducted to investigate the effect of independent parameters such as pH, contact time, adsorbent dose, and initial concentration on the removal percent of sunset yellow FCF. The absorbance of the specimens was read three times by a spectrophotometer apparatus at the wavelength of 480 nm. In this study, the Langmuir and Freundlich adsorption isotherm models were used for mathematical modeling of the sunset yellow color adsorption process. Additionally, the pseudo-first- and pseudo-second-order kinetics equations were used for data analysis.Results: The contact time played a greater role in the adsorption process than either pH or initial dye concentration. By increasing contact time from 5 min to 50 min, the dye removal efficiency increased from 62% to 85%. When the weight of the adsorbent increased from 1 g to 8 g, the dye removal efficiency increased from 65% to 82%. Freundlich isotherm models could describe the adsorption equilibrium of the dye onto the granular activated carbon. Freundlich isotherm represented a better correlation compared to other isotherms (R2>0.9998). Moreover, pseudofirst- order models fit well with the experimental data (R2>0.9975).

Keywords: Adsorption, Dye, Granular activated carbon, Sunset yellow
بررسی وضعیت استرس شغلی در بین رانندگان شرکت واحد اتوبوسرانی شهر بجنورد

بررسی وضعیت استرس شغلی در بین رانندگان شرکت واحد اتوبوسرانی شهر بجنورد

Authors: rajabali hokmabadi, hamid tavakoli, morteza morteza esmailzade, hossien ebrahimyan
Year: 2018, Volume: 4, Number: 1
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Abstract

مقدمه و هدف: استرس شغلی پیامد فرایند کار، عوامل و شرایط کار می باشد و منجر به بیماری های جسمی و روحی- روانی می شود. رانندگی اتوبوس شهری یکی از موقعیت های پراسترس شغلی است؛ از این رو هدف از مطالعه حاضر بررسی وضعیت استرس شغلی در بین رانندگان شرکت واحد اتوبوسرانی می باشد.روش کار: در این مطالعه توصیفی- تحلیلی- مقطعی، وضعیت استرس شغلی 61 نفر از رانندگان واحد اتوبوسرانی شهر بجنورد به صورت تصادفی ساده و با مراجعه حضوری در سال 1395 بررسی گردید. جهت ارزیابی از پرسشنامه Philip el Rice بهره گرفته شد و داده ها با استفاده از نرم افزار SPSS 18 تجزیه و تحلیل گردیدند. ​یافته ها: نتایج نشان داد که تمامی رانندگان مورد مطالعه مرد و متأهل بودند. میانگین سنی افراد مورد مطالعه 5± 41 سال، میانگین سابقه کاری 5± 12 سال و میانگین نمره استرس شغلی رانندگان 8/ 24 ± 5/ 147 بود؛ به طوری که 97 درصد از رانندگان دارای استرس زیاد بودند. همچنین بر مبنای نتایج مشاهده شد که استرس شغلی فقط با شیفت کاری ارتباط معناداری دارد ( 016 / P= 0 ) و رابطه آن با سایر متغیرها از جمله  سن، سابقه کاری، سطح تحصیلات و نوع استخدام معنادار نمی باشد.نتیجه گیری: با توجه به اینکه میزان استرس شغلی در بین رانندگان اتوبوسرانی بسیار بالا است،اجرای یک برنامه جامع مدیریت استرس در سطح سازمان الزامی می‌باشد.

Keywords: استرس شغلی, بررسی, رانندگان واحد اتوبوسرانی
Assessment of Occupational Stress among Bojnurd Bus Drivers

Assessment of Occupational Stress among Bojnurd Bus Drivers

Authors: rajabali hokmabadi, hamid tavakoli, morteza morteza esmailzade, hossien ebrahimyan
Year: 2018, Volume: 4, Number: 1
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Abstract

 Introduction and purpose: Today, occupational stress is an outcome of occupational processes, factors, and conditions. The bus driver job is one of the most stressful occupations. The main objective of this study was the assessment of occupational stress level in Bojnurd city-bus drivers. Methods: This cross-sectional, descriptive-analytical study was performed on 61 bus drivers in the city of Bojnurd, Iran, who were chosen using the simple random  sampling method in 2016. The data were gathered using Philip el Rice standard job stress questionnaire. Data analysis was performed in SPSS version 18. Results: The results showed that all the drivers were male and married. The mean age of the subjects was 41±5 years, and the average working experience was 12±5 years. The average occupational stress score in drivers was 147.5±24.8. The results indicated that 97% of the drivers were under high stress. In addition, the results showed a significant relationship between job stress and work shift. However, there was not any significant association between job stress and other variables such as age, work experience, educational level, and employment type. Conclusion: High stress level in the studied drivers indicated that the implementation of a comprehensive stress management program is required.

Keywords: Assessment, Bus drivers, Occupational stress
حذف سرب از آب های آلوده توسط کلاله ذرت به عنوان یک بیوجاذب ارزان قیمت

حذف سرب از آب های آلوده توسط کلاله ذرت به عنوان یک بیوجاذب ارزان قیمت

Authors: Yaghoub Karimi, Safar Marofi, Mohamad Ali Zare
Year: 2018, Volume: 4, Number: 1
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Abstract

مقدمه و هدف: ورود فلزات سنگین به منابع آب، اثرات زیان باری را برای سلامت انسان و محیط زیست به همراه دارد. در سالیان اخیر روش های جذب سطحی با استفاده از جاذب های طبیعی جهت حذف آلاینده ها از منابع آب به شکل فراوان مورد استفاده قرار گرفته اند. کلاله ذرت به عنوان جاذب زیستی می تواند در حذف یون سرب از محیط های آبی مؤثر باشد. در این راستا، هدف از پژوهش حاضر حذف یون سرب به وسیله کلاله ذرت به عنوان بیوجاذب ارزان قیمت از آب های آلوده در  شرایط آزمایشگاهی می باشد.روش کار: در این پژوهش اثر متغیرهای pH ، زمان تماس، مقدار جاذب و غلظت اولیه در کارایی حذف یون سرب از آب های آلوده مورد بررسی قرار گرفت. داده های به دست آمده با ایزوترمهای ،Langmuir Freundlich و Temkin و سینتیک های واکنش شبه درجه اول، شبه درجه دوم، انتشار درون ذره ای و Elovich برازش داده شدند. آنالیز داده ها و رسم نمودارها با استفاده از برنامه Excel انجام شد.یافته ها: برای جاذب کلاله ذرت، مدل Langmuir تطابق بیشتری با داده های تجربی داشت و با استفاده از این مدل ماکزیمم ظرفیت جذب 74 / 78 میلی گرم بر گرم برای کاکل ذرت به دست آمد. شایان ذکر است که سینتیک جذب واکنش، سریع و کمتر از یک ساعت محاسبه شد. همچنین مشاهده گردید که سینتیک جذب از معادله شبه درجه دوم برای آلاینده سرب مطابقت بیشتری دارد(r2=0/99).نتیجه گیری: نتایج به دست آمده نشان دادند که جاذب کلاله ذرت به دلیل داشتن سطح مؤثر بالا، گروه های عاملی SiOH ، ماکزیمم ظرفیت جذب بالا و سینتیک سریع واکنش، جاذبی مؤثر در حذف آلاینده سرب از محیط های آبی می باشد؛ از این رو استفاده از این جاذب به منظور حذف سرب از محیط های آبی پیشنهاد می گردد.

Keywords: ایزوترم, جذب سطحی, سرب, سینتیک جذب, کلاله ذرت

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