The Effects of Organic Matter on Ammonium Adsorption in Wuli Lake Sediments

2011 International Conference on Computer Distributed Control and Intelligent Environmental Monitoring Pub Date : 2011-04-11 DOI:10.1109/CDCIEM.2011.291

Juan Wang, Yuejin Zhang

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引用次数: 2

Abstract

Organic matter (OM) is important for ammonium sorption in lake sediments, but as a matter of fact, there is no general consensus about the effects of OM on ammonium adsorption behavior. In this study, the sediment samples of different OM contents and the different components of organic matter were gained from Wuli Lake sediment through pretreatment, then the ammonium adsorption kinetics and thermodynamics processes were investigated without taking the mineralization of OM into account in simulating laboratory condition, especially analyzing the ammonium adsorption mechanism and adsorption contribution of the different component of OM using scan electronic microscope (SEM)techniques. The results show that the ammonium adsorption on sediments was effected by the OM content and the humified degree of OM simultaneously, The different components of OM had different surface characteristics, and the order of ammonium adsorption capacity was HA>HKB>KB>BC;Controlled by the humified degree of OM, the accessibly young OM (HA) rather than the total OM was a factor in the adsorption of ammonium.

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有机物对五里湖沉积物中铵吸附的影响

湖泊沉积物中有机质对铵离子的吸附具有重要作用，但有机质对铵离子吸附行为的影响目前尚无普遍共识。本研究以五里湖沉积物为研究对象，通过预处理获得了不同有机质含量和不同有机质组分的沉积物样品，在模拟实验室条件下，研究了不考虑有机质矿化的铵吸附动力学和热力学过程。特别是利用扫描电镜(SEM)技术分析了OM不同组分对铵的吸附机理和吸附贡献。结果表明:沉积物对铵的吸附同时受OM含量和OM的腐殖度的影响，OM的不同组分具有不同的表面特征，铵的吸附量顺序为HA>HKB>KB>BC;受OM腐殖度的控制，影响铵吸附的主要因素是可达幼OM (HA)而不是总OM。

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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2011 International Conference on Computer Distributed Control and Intelligent Environmental Monitoring

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