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黑碳对沉积物和土壤中乙草胺吸附作用

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Indexed by:期刊论文

Date of Publication:2010-01-15

Journal:大连理工大学学报

Included Journals:EI、PKU、ISTIC、CSCD、Scopus

Volume:50

Issue:1

Page Number:26-30

ISSN No.:1000-8608

Key Words:乙草胺 黑碳 土壤 沉积物 吸附

Abstract:黑碳是自然界普遍存在的物质,它对持久性污染物的迁移转化有重要影响.研究了沉积物和土壤中的黑碳在农药乙草胺吸附行为中的作用.结果表明:乙草胺在黑碳上的初始吸附符合一级动力学模型.在黑碳与有机碳相对含量较低(fBC/fOC=0.02~0.09)时,非黑碳的有机碳对吸附起主要作用.在黑碳与有机碳的相对含量较高(0.30~0.61)时,黑碳对吸附起主导作用,黑碳相对含量越高,对Koc影响越大.同时,建立了乙草胺吸附体系中Koc与fBC之间的关系模型用于预测不同黑碳含量的天然吸附剂对乙草胺的吸附能力.

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