Evaluation of the Efficiency of Ammonia Removal from Aqueous Medium Using Inexpensive Adsorbent Obtained from Walnut Shell
Journal Title: Journal of Health Research in Community - Year 2021, Vol 7, Issue 3
Abstract
Introduction and Objectives: Ammonia is a colorless gas with a pungent and corrosive odor that can cause serious damages to human health and the environment. Ammonia is used in the industries of pharmacology, tanning, and silvering mirrors and the production of military explosives. This study aimed to investigate the efficiency of inexpensive adsorbent obtained from the walnut shell in the surface absorption of ammonia from water and the parameters affecting it. Materials and Methods: In this quasi-experimental interventional study, charcoal of walnut shell was used and the effects of carbonization temperature, pH, ammonia concentration, adsorbent dose, and contact time on the adsorption of ammonia from the aqueous medium were investigated. Ammonia concentration was measured by a spectrophotometer at 640 nm. More than 712 samples were analyzed for this study. Results: In this study, the highest efficiency of ammonia removal from an aqueous medium was obtained at optimal pH 8, carbonization temperature of 850°C, and adsorbent dose of 20 g/l. According to the obtained adsorption capacity, the optimal concentration for ammonia removal was considered 60 mg/l. The results showed that the experiments followed the Freundlich isotherm (R²=0.9949). Kinetic studies also indicated a higher correlation with the first-order equation. Conclusions: Based on the results of this study, it can be stated that the adsorbent obtained from the walnut shell, as a natural adsorbent, is able to remove a relatively desirable amount of ammonia from aqueous medium and is recommended for other environmental pollutants due to its high adsorption capacity.
Authors and Affiliations
Mahmud Mohammadyan,Mahdi Ghorbanian,Elham Rahmanzadeh,Jamshid Yazdani Charati,Esmael Babanejad,Sepideh kamali,
Keywords
Related Articles
- EP ID EP701664
- DOI -
- Views 27
- Downloads 0
Comparison of Sound Balance in Turning and Polishing Shops in Qom with Sound Standards in Iran
Introduction and purpose: Noise pollution is an important health problem in most industries, especially in the small inland industries. The purpose of this study was to evaluate the noise pollution in turning and polishi...
Head Lice Contamination with Emphasis on Effective Therapeutic Methods in Schoolchildren in Mashhad, Iran, during 2017-2018
Introduction and purpose: Head lice as external parasite contamination is one of the health-threatening issues that despite the upgrading of health, is still a health problem. Methods: This clinical trial study was carri...
Role of Nutrigenetics in Controlling Inflammation and Cardiovascular Disease Risk Factors: A Narrative Review
Introduction and purpose: There are several important factors for prevention of cardiovascular diseases (CVD). Out of all, diet modification has a great amount of efficacy. However, the genetic differences in individuals...
Relationship between Cognitive Status and Medication Adherence among Elderly Patients with Hypertension
Introduction and purpose: Poor medication adherence may result in adverse outcomes, such as a higher rate of hospitalization and increased costs of healthcare. In this regard, the present study was designed to determine...
Investigation of Biogas Production Process by the Mixture of Landfill Leachate and Animal Waste
Introduction and purpose: Energy consumption is on a rapidly growing trend in the world. Accordingly, the non-renewable energy sources are expected to be run out in the future. This issue has resulted in the establishmen...