تهیه نانوالیاف پلیاکریلونیتریل و اصلاح شده سطحی با دیاتیلنتریآمین برای جذب یون کادمیم
Journal Title: آب و فاضلاب - Year 2016, Vol 27, Issue 3
Abstract
Preparation of Diethylenetriamine Modified Polyacrylonitrile Nanofibers for Cadmium Ion Adsorption Abstract In this study, the electrospinning method was used to manufacture polyacrylonitrile (PAN) nanofibers. The procedure involved spinning a solution of 10%wt PAN in dimethyl formamide (DMF) in an electric field of 21 kV and with a tip to collector distance of 16 cm. The nanofibers thus obtained had an average diameter of 100 nm. Then, scanning electron microscopy (SEM) images were used to investigate the morphology of the nanofibers. In the next step, the nanofiner surface was modified with diethylenetriamine and FTIR was employed to ensure the presence of amines on the nanofiber surface. The functionalized nanofibers were then used for the first time to adsorb ions of cadmium (a heavy metal with industrial applications) and its adsorption capacity was evaluated. The chemical charactristics of the nanofibers and the effects of such parameters as pH, temprature, and contact time on adsorption efficiency were investigated. The results showed that maximum adsorption efficiency was achieved within the first 10 minutes of the process at a pH in the range of 5‒7 when about 80% of the cadmium ions were adsorbed.. Moreover, only slight changes were observed with longer contact times or with increasing temperature. Finally, the adsorption data fitted well with the Langmuir isotherm
Authors and Affiliations
zahra Mokhtari, Mehdi Rafiezadeh, Mehrnoosh Mohammadi
بهينهسازي فرايند تصفيه پساب کارخانجات لبني با استفاده از لختهکنندههاي طبيعي و شيميايي
Optimization of COD Removal from Dairy Plant Effluents Using Natural and Chemical Coagulants Effluents from dairy plants inactivate the active water ecosystem as a result of reducing their dissolved oxygen content, there...
مشخصهيابي فيزيکي و شيميايي رسوب چربي و روغن موجود در خطوط فاضلاب شهر مشهد و راههاي جلوگيري از آن
Physical and Chemical Characterization of Fat and Oil Deposits in Mashhad City Sewer Lines and the Solutions Developed Formation of oil, fat, and grease deposits in sewer pipelines is a major concern as they result in se...
محاسبه احتمال رویداد شکست در شبکههای جمعآوری فاضلاب با استفاده از شبکه بیزین
Failure Event Probability Calculation in Wastewater Collection Systems Using the Bayesian Network Abstract Wastewater systems form an important urban infrastructure that are used for the collection and treatment of wast...
ارزیابی فنی و اقتصادی استفاده از پمپهای دور متغیر در شستشوی معکوس فیلترهای ماسهای تند( مطالعه موردی)
Technical and Economic Evaluation of the Use of Variable Speed Pumps in the Backwashing of Rapid Sand Filters (A Case Study) S. Azodi1, M. Fazeli2 1. MSc Student of Civil and Water & Wastewater Engineering, Faculty o...
پيشبيني تغييرات زماني افت فشار در صافي شني Prediction of Temporal Changes of Head Loss in Sand Filter
Abstract Granular media including rapid gravity sand filters are used in water and wastewater treatments. When sand filters are clogged due to deposits of particles and particul-bound pollutants, it will lead to head lo...