Sorption of Metal Ions from Aqueous Solutions by Humic Substances

IF 0.8 4区 工程技术 Q4 CHEMISTRY, MULTIDISCIPLINARY
Z. R. Ismagilov, V. G. Smirnov, N. V. Malyshenko, S. I. Zherebtsov
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引用次数: 0

Abstract

Humic substances (HSs) extracted from brown coal, peat, and other sources are considered as an efficient and affordable sorbent used to trap and bind heavy metal ions, which are hazardous to the environment. This paper provides an overview of modern works on this subject matter. Typical structural characteristics and properties of HSs and methods for their extraction from brown coal, peat, swamp waters, and other media are described, and quantitative results of a wide range of experiments on the sorption of metal ions by HSs are presented. Significant fluctuations in the measured sorption capacity of HSs in different experiments probably arise not so much due to variations in the elemental composition and structure of HSs extracted from different sources, but they are associated with experimental conditions, such as the acidity (pH) of solution, ionic strength, concentration of metal ions, and concentration of HSs in the solution. In terms of the order of magnitude, the maximum sorption capacity of HSs is comparable to the total concentration of surface carboxyl and hydroxyl groups, and it amounts to several millimoles of metal ions per gram of HSs.

腐殖物质对水溶液中金属离子的吸附
从褐煤、泥炭和其他来源提取的腐殖物质(HS)被认为是一种有效且价格合理的吸附剂,用于捕获和结合对环境有害的重金属离子。本文概述了关于这一主题的现代作品。描述了HSs的典型结构特征和性质,以及从褐煤、泥炭、沼泽水和其他介质中提取HSs的方法,并介绍了HSs吸附金属离子的广泛实验的定量结果。在不同的实验中,测得的HSs吸附能力的显著波动可能并不是因为从不同来源提取的HSs的元素组成和结构的变化,而是与实验条件有关,如溶液的酸度(pH)、离子强度、金属离子的浓度和溶液中HSs的浓度。就数量级而言,HSs的最大吸附能力与表面羧基和羟基的总浓度相当,相当于每克HSs几毫摩尔的金属离子。
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来源期刊
Solid Fuel Chemistry
Solid Fuel Chemistry CHEMISTRY, MULTIDISCIPLINARY-ENERGY & FUELS
CiteScore
1.10
自引率
28.60%
发文量
52
审稿时长
6-12 weeks
期刊介绍: The journal publishes theoretical and applied articles on the chemistry and physics of solid fuels and carbonaceous materials. It addresses the composition, structure, and properties of solid fuels. The aim of the published articles is to demonstrate how novel discoveries, developments, and theories may be used in improved analysis and design of new types of fuels, chemicals, and by-products. The journal is particularly concerned with technological aspects of various chemical conversion processes and includes papers related to geochemistry, petrology and systematization of fossil fuels, their beneficiation and preparation for processing, the processes themselves, and the ultimate recovery of the liquid or gaseous end products.
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