湖泊科学Issue(3)：493-501,9.
过氧化钙对水中低浓度磷的去除性能∗
Low concentration of phosphorus removal in waters with CaO2
摘要
Abstract
Aiming at the advanced purification of low concentration of phosphorus in natural water, the adsorption of phosphate by CaO2 was studied using the models of adsorption kinetics and adsorption isotherm, and the influence of different operating parame-ters on the phosphorus removal was investigated. The results showed that:(1) The experimental data for the process of phosphate uptake onto CaO2 fit the Langmuir isotherm mode, and the maximum adsorption capacity was 381. 7 mg/g (25℃). (2) Thermo-dynamic parameters in the process of phosphorus removal areΔG0 <0 andΔH0 <0, while the process was a spontaneous exother-mic one. (3) The adsorption performance of CaO2 was evaluated by the pseudo-second-order reaction rate equation, when the ad-sorption rate increased with the increasing concentration of phosphate in the solution, and the adsorptive reaction reached equilibri-um in 4 minutes. (4) The optimized effect of phosphorus removal was obtained at pH=8. (5) Among the high concentrations of coexisting anions, the CO2-3 expressed the greatest influence on phosphorus removal of CaO2 and could make the adsorption capaci-ty reduce 14. 7% under the concentration of 10 times.关键词
过氧化钙/磷酸盐/除磷/低浓度Key words
CaO2/phosphate/phosphorus removal/low concentration引用本文复制引用
熊鑫,柯凡,李勇,李文朝,潘继征,张洪,高亚..过氧化钙对水中低浓度磷的去除性能∗[J].湖泊科学,2015,(3):493-501,9.基金项目
国家水体污染控制与治理科技重大专项(2012ZX07103)资助 （2012ZX07103）
