生态与农村环境学报2012，Vol.28Issue(6)：706-711,6.
硅藻土基复合除磷剂的制备及其吸附性能
Preparation and Adsorption Performance of Diatomite-Based Composite Phosphorus Removal Agent
摘要
Abstract
Diatomite was used as raw material and prepared into a diatomite-based composite phosphorus removal agent by combining it with some combining steel slag. The agent was characterized with Fourier transform infrared spectroscopy (FTIR) , X-ray diffraction (XRD) and scanning electron micrograph (SEM). Besides, effects of dosage of the agent used, duration of the adsorption, pH value and temperature on performance of the agent were investigated by batch sorp-tion experiments. Results show that combination with steel slag has brought about some changes in some parssads and in crystalline structure, creating new crystal phases. Static P-removing experiments demonstrate that the agent performed the best when the agent was applied at a rate of 2 g · L-1 , into the wastewater, 5 in pH and 25 ℃ in temperature, for 1 h incubation. Evaluation of the experimental data in terms of adsorption kinetics reveals that the P adsorption kinetic behavior of the agent well fitted the pseudo-second-order kinetic model. Meanwhile, isothermal equations, such as Freundlich, l.angmuir and Redlich-Peterson isotherms can be used to well describe the adsorption performance of the agent. The theoretical P saturation adsorption capacity of the agent is 1 428 mg · kg-1 , which indicates that the diatomite-based composite phosphorus removal agent can be used as a potentially efficient and environmental friendly absorbent material.关键词
复合除磷剂/硅藻土/钢渣/动力学/吸附等温线Key words
composite phosphorus removal/diatomite/steel slag/kinetics/adsorption isotherm分类
资源环境引用本文复制引用
高耀文,段宁,吴克明,沈丽娟..硅藻土基复合除磷剂的制备及其吸附性能[J].生态与农村环境学报,2012,28(6):706-711,6.基金项目
湖北省教育厅重点项目(D20101107) （D20101107）
