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研究论文

Influences of co-existing pollutants on the sorption of atrazine by natural sediment

摘要：实验研究了重金属和表面活性剂对阿特拉津在沉积物上吸附的影响.结果表明,Cu²⁺和Cd²⁺在低浓度时对阿特拉津吸附无影响或降低其吸附,高浓度时则能明显或轻微促进其吸附.在实验浓度范围内,与对照相比,表面活性剂十二烷基苯磺酸钠(SDBS)和十六烷基三甲基溴化铵(CTAB)抑制阿特拉津的吸附,而Span-20则在低浓度时(≤1mg·L^-1)抑制阿特拉津的吸附,高浓度时(>1mg·L^-1)促进其吸附.

Abstract：In this study, a series of experiments were carried out to determine the influences of heavy metals and surfactants on the sorption of atrazine in sediment. The results showed that Cu²⁺ did not affect the adsorption of atrazine while Cd²⁺ decreased atrazine adsorption at lower concentrations. However at higher concentrations, Cu²⁺ could greatly and Cd²⁺ could slightly enhance the adsorptive capacity of atrazine, respectively. Over the range of surfactant concentrations examined, SDBS and CTAB decreased the adsorption of atrazine in comparison with the surfactant free system, while Span 20 decreased the adsorption of atrazine at lower concentrations (≤1mg·L^-1) and enhanced adsorption at higher concentrations (>1mg·L^-1).