不同土壤有机质组分对憎水有机物的吸附机理研究

被引:23
作者
陈迪云
黄伟林
机构
[1] 广州大学桂花岗校区环境科学系
[2] School of Environmental Science
[3] Engineering and Policy
[4] Drexel University 广东广州
[5] Philadelphia
[6] USA
关键词
有机质组分; 不均匀性; 非线性吸附; 憎水有机物;
D O I
10.19700/j.0379-1726.2003.04.010
中图分类号
S153 [土壤化学、土壤物理化学];
学科分类号
0903 ; 090301 ;
摘要
采用完全混合一步平衡反应实验方法,选择菲、萘、三氯苯和二甲苯作为憎水有机物(HOCs)的探针,研究了它们在土壤及其中的胡敏酸、胡敏素等有机质组分中的等温平衡吸附行为,探讨了非线性吸附的机制。结果表明,HOCs在水与土壤体系中表现为非线性吸附,其非线性的吸附行为主要受到土壤有机质(SOMs)的控制。SOMs具有高度不均匀的性质,HOCs表现出非线性吸附行为是其在不同的SOMs相扩散转移以及在相对聚结的胡敏素和“黑炭”的表面吸附的结果。
引用
收藏
页码:368 / 374
页数:7
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