بهینه سازی حذف آرسنیک از طریق جذب بر روی رس مونتموریلونیت اصلاح شده: روش های آزمایشگاهی و تئوری

محسنی بندپی, انوشیروان and محسنی, سید محسن and شیخ محمدی, امیر and سردار, مهدیه and سرخوش, مریم and الماسیان, محمد and عوض پور, موید and مصلا نژاد, زهرا and عطافر, زهرا and نظری, شهرام and رضایی, سهیلا (1395) بهینه سازی حذف آرسنیک از طریق جذب بر روی رس مونتموریلونیت اصلاح شده: روش های آزمایشگاهی و تئوری. Korean Journal of Chemical Engineering ــ online . pp. 1-8. شاپا 0256-1115


Official URL: http://link.springer.com/journal/11814


Optimization of arsenite removal by adsorption onto organically modified montmorillonite clay: Experimental & theoretical approaches

English Abstract

Arsenic is a critical contaminant for aqueous environments as it poses harmful health risks.To meet the stringent regulations regarding the presence of arsenic in aqueous solutions, the feasibility of montmorillonite clay modified with hexadecyltrimethyl ammonium chloride as the adsorbent was tested for the removal of arsenic ions from aqueous solutions. A scanning electron microscopy (SEM) study confirmed that the organically modified nanoclay (ONC) adsorbent had a porous structure with a vast adsorbent surface.The x-ray fluorescence (XRF) analysis proved the presence of carbon in the structure of the modified nanoclay that can be evidence for the creation of ONC. The x-ray diffraction (XRD) analysis results confirm the existence of four main groups of minerals, carbonate (Calcite), clay (Askmtyt and Kandyt), silicate (Quartz), and phyllosilicate (Kaolinite), in the ONC structure.The influence of various parameters such as solution pH, adsorbent dosage, initial arsenite concentration, and contact time on arsenic adsorption onto ONC was investigated. A 25 full factorial central composite experimental design was applied. A central composite design under response surface methodology (RSM) was employed to investigate the effects of independent variables on arsenite removal and to determine the optimum condition. The experimental values were in a good fit with the ones predicted by the model. The optimal operating points (adsorbent dosage: 3.7 g L−1, surfactant dosage: 3 g L−1 and the contact time: 37.2min) giving maximum arsenite removal (95.95%) were found using Solver “Add-ins” in Microsoft Excel 2010.

Item Type:Article
زبان سند : انگلیسی
نویسنده اول :انوشیروان محسنی بندپی
نویسنده مسئول :امیر شیخ محمدی
نویسنده :شهرام نظری
Additional Information:Impact Factor (2015)1.408 Indexed in: ISI, Scopus, Chemical Abstracts Service (CAS), Google Scholar, Current Contents/Engineering, Computing and Technology, Expanded Academic
کلیدواژه ها (انگلیسی):Modeling, Response Surface Methodology, Organic Nanoclay, Arsenite, Optimization
Subjects:WA Public Health
WA Public Health
Divisions:Faculty of Health > Department of Environmental health
ID Code:8227
Deposited By: MR Shahram Nazari
Deposited On:11 Oct 1395 10:40
Last Modified:06 Jun 1397 13:48

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