Adsorption of organic pollutants by natural and modified clays: A comprehensive review

IF 9 1区工程技术 Q1 ENGINEERING, CHEMICAL

Separation and Purification Technology Pub Date : 2019-12-01 DOI:10.1016/j.seppur.2019.115719

Abdelrahman M. Awad , Shifa M.R. Shaikh , Rem Jalab , Mona H. Gulied , Mustafa S. Nasser , Abdelbaki Benamor , Samer Adham

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引用次数: 329

Abstract

Adsorption process has been widely used for treatment of wastewaters due to its simplicity and lower costs as compared to other traditional technologies. Among the alternative sorbent materials, the use of abundantly available clays for adsorption of organic pollutants has garnered increasing attention worldwide. Clays, in its natural and modified forms, have been extensively employed for the removal of organic contaminants from different wastewaters. The current review appraises the sorption performance of natural and modified clays for environmental remediation applications. The adsorption capacity of phenolic compounds, aromatic compounds, pesticides and herbicides, and other organic contaminants are comprehensively reviewed. The effect of the experimental conditions (pH, initial concentration (C_o), surfactant loading, etc.) on the adsorption capacity is also appraised. Furthermore, the adsorption mechanisms, structures, and adsorptive characteristics of natural and modified clay sorbents are included. A statistical analysis of the adsorption isotherms reveals that Langmuir and Freundlich are the most examined models in fitting the experimental adsorption data. In addition, the adsorption kinetics is predominantly based on the pseudo-second-order model. The current review is an attempt to draw a prior knowledge about the technical viability of clay sorption process by assessing outcomes of the studies published between 2000 and 2018.

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天然和改性粘土对有机污染物的吸附研究综述

与其他传统技术相比，吸附法因其简单、成本低而被广泛应用于废水处理。在可选的吸附材料中，利用可利用性丰富的粘土吸附有机污染物已引起世界范围内越来越多的关注。粘土，在其天然和改性形式，已被广泛用于去除有机污染物从不同的废水。本文综述了天然粘土和改性粘土在环境修复中的吸附性能。对酚类化合物、芳香族化合物、农药除草剂和其他有机污染物的吸附能力进行了全面的综述。考察了实验条件(pH、初始浓度(Co)、表面活性剂负载等)对吸附量的影响。此外，还介绍了天然和改性粘土吸附剂的吸附机理、结构和吸附特性。吸附等温线的统计分析表明，Langmuir和Freundlich模型在拟合实验吸附数据时检验最多。此外，吸附动力学主要基于伪二阶模型。目前的审查是试图通过评估2000年至2018年发表的研究结果，得出关于粘土吸附过程技术可行性的先验知识。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Separation and Purification Technology 工程技术-工程：化工

CiteScore

14.00

自引率

12.80%

发文量

2347

审稿时长

43 days

期刊介绍： Separation and Purification Technology is a premier journal committed to sharing innovative methods for separation and purification in chemical and environmental engineering, encompassing both homogeneous solutions and heterogeneous mixtures. Our scope includes the separation and/or purification of liquids, vapors, and gases, as well as carbon capture and separation techniques. However, it's important to note that methods solely intended for analytical purposes are not within the scope of the journal. Additionally, disciplines such as soil science, polymer science, and metallurgy fall outside the purview of Separation and Purification Technology. Join us in advancing the field of separation and purification methods for sustainable solutions in chemical and environmental engineering.