丽水学院学报2016，Vol.38Issue(5)：37-41,5.DOI:10.3969/j.issn.2095-3801.2016.05.007
低分子量有机酸对可变电荷土壤吸附铅的影响
The Effects of Low Molecular Weight Organic Acids on Lead Adsorption by Soils with Variable Charge
摘要
Abstract
The influence of salicylic and phthalic acids on Pb adsorption by Soils with was studied adopting equilibrium test technique. The results indicate:the adsorption behavior of the soil for Pb obeys the Langmuir and Freundlich isotherm, and the soils are high in adsorption capacity for two organic acids;the organic acids could increase the Pb adsorption amount of soil;the influence of organic acid on Pb adsorption increases with the increase of pH value in the system and reaches the maximum in pH5.4 (salicylic acid system) and 4.7 (benzoic acid system) respectively, and then decreased gradually; the organic acids could influence Pb adsorption by soil through two mechanisms———the formation of soil-organic acid-cation surface ternary complex compound and the change of surface charge of soil;the effect of the soil after organic acids adsorption on Pb secondary adsorption is almost same as that of competitive adsorption, but the adsorption of former is better than the latter.关键词
可变电荷土壤/有机酸/吸附/铅Key words
soil with variable charge/organic acids/adsorption/Pb分类
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莫建军..低分子量有机酸对可变电荷土壤吸附铅的影响[J].丽水学院学报,2016,38(5):37-41,5.
