北京师范大学学报：自然科学版2012，Vol.48Issue(5)：582-586,5.
泥沙质量浓度和pH对不同粒径泥沙吸附磷影响研究
EFFECT OF SEDIMENT MASS CONCENTRATION AND pH ON PHOSPHORUS ADSORPTION AT DIFFERENT SEDIMENT SIZE
摘要
Abstract
Surface sediments was collected from Nanhaizi Lake,Beijing.Phosphorus adsorption by sediments 0.246 mm showed that sediment mass concentration was 5、10、30 and 50 g·L-1.Effect of pH on phosphorus adsorption for four particle size sediments included fine sand(0.147-0.246 mm),very fine sand(0.074-0.147 mm),silt(0.0385-0.0740 mm),mixture of silt and clay(≤0.0385 mm).Data showed that the second order kinetics model could well describe the behaviors of phosphorus sorption with determination coefficients of R2(0.98).The saturation adsorption capacity(Cse) of different size particles was in the following order: silt and clay(0.107 mg·g-1),silt(0.096 mg·g-1),fine sand(0.095 mg·g-1) and very fine sand(0.051 mg·g-1).The impact of pH on the very fine sand,silt,silt and clay mixture was similar.When pH was between 4 and 10,the adsorption capacity remained unchanged.The adsorption decreased with pH10,and the adsorption capacity increased at pH4 for phosphorus initial mass concentrations 1.2 mg·L-1.With the increase of sediment mass concentration,the absolute phosphorus adsorption amount increased.However,the unit mass sorption decreased,and there was a competitive adsorption among sediments and related phosphorus initial mass concentrations.关键词
泥沙/pH/质量浓度/磷/吸附Key words
sediment/pH/mass concentration/phosphorus/sorption分类
数理科学引用本文复制引用
崔双超,丁爱中,潘成忠,李长嘉,鄢正红,郝丽芬..泥沙质量浓度和pH对不同粒径泥沙吸附磷影响研究[J].北京师范大学学报：自然科学版,2012,48(5):582-586,5.基金项目
国家自然科学基金资助项目 （）
中央高校基本科研业务费专项资助项目 （）
水体污染控制与治理科技重大专项河流主题特殊类型河流项目渭河资助课题 （）
北京市委、市政府重点工作及区县政府应急预启动资助项目 （）
