酞酸酯物质在皂河水体中的环境行为研究

摘要

分析皂河水体和沉积物中邻苯二甲酸二甲酯(DMP)、邻苯二甲酸二乙酯(DEP)、邻苯二甲酸丁基苄酯(BBP)、邻苯二甲酸二丁酯(DBP)四种物质的含量,用DMP进行吸附研究,探讨pH值和DMP初始浓度对吸附等温特性的影响.结果表明,皂河水体和沉积物中四种物质浓度范围分别为为0.004～3.44 μg/L和1.1～6.12 μg/g;在一定的浓度范围时,DMP在沉积物上的吸附速率先快后慢,吸附等温线以Langmuir方程拟合最佳.沉积物对DMP的吸附随着pH的增大而减小,初始浓度增大,平衡吸附量增大最后趋于稳定.%The content of four kinds of materials in Zaohe water and sediment,dimethyl phthalate(DMP),diethyl phthalate(DEP)and phthalic acid butyl benzyl ester(BBP),butyl phthalate(DBP),was analyzed.The adsorption with DMP was studied,the influence of pH value and initial concentration of DMP on adsorption isothermal characteristics was discussed.The results showed that four substances concentration in the Zaohe water and sediment were in the range of 0.004～3.44 μg/L and 1.1～6.12 μg/g,respectively.In a certain concentration range,the adsorption speed of DMP on sediment was fast at first,then slow,to Langmuir equation was the best for adsorption isotherm.DMP adsorption of sediments was decreased with the increase of pH,initial concentration increased,equilibrium adsorption quantity first increased,then became stable at last.