红壤对磷的吸附特性及其影响因素研究  

Phosphorus Adsorption Characteristics of Red Soil and Its Influencing Factors

作　　者：黄中子[1] 吴晓芙[2] 赵芳[2] 芦鹏[3] 

机构地区：[1]上海工程技术大学化学化工学院,上海201620 [2]中南林业科技大学资源与环境学院,湖南长沙410004 [3]湖南冶金职业技术学院建筑工程系,湖南株洲412000

出　　处：《中国给水排水》2009年第21期91-94,共4页China Water & Wastewater

基　　金：上海市高校培养优秀青年教师科研专项基金资助项目(gjd-07015)

摘　　要：以红壤为吸附剂，研究了固／液吸附体系中红壤对磷的吸附特性，探讨了温度和pH对红壤吸附磷的影响。结果表明，红壤对磷的等温吸附数据与Langmuir和Freundlich方程的拟合优度较高，当温度为30℃时，红壤对磷的饱和吸附量高达1．61mg／g，说明红壤是一种优良的磷素吸附材料；红壤对磷的吸附量在吸附初期随吸附时间急剧上升而后期趋于稳定，当磷的初始浓度为25～100mg／L时，12h时的吸附量均可达到平衡吸附量的90％以上；当磷的初始浓度〈50mg／L时，温度对红壤吸附磷基本无影响，但随着磷初始浓度的升高，温度对红壤吸附磷的影响渐趋明显；在所检测的试验体系中，pH值为4～8时对红壤吸附磷无明显影响。The phosphorus adsorption characteristics of red soil in solid-liquid adsorption system were studied, and the influence of temperature and pH on the phosphorus adsorption was discussed. The results indicate that the isothermal adsorption data fit well with the Langmuir and Freundlich models. The saturated adsorption capacity of phosphorus can reach 1.61 mg/g when the temperature is 30℃, indica- ting that the red soil is a good adsorbent material for removing phosphorus. The phosphorus adsorption quantity increases rapidly with time in the initial period and then approaches to a constant level in the lat- er period. When the initial phosphorus concentration is 25 to 100 mg/L, the phosphorus adsorption quan- tity can reach over 90% of the equilibrium adsorption quantity within 12 h. The influence of temperature on phosphorus adsorption is negligible when the initial phosphorus concentration is less than 50 mg/L. The influence of pH of 4 to 8 on phosphorus adsorption is not significant in the test sample system.

关 键 词：红壤 磷 吸附 温度 PH 

分 类 号：X703[环境科学与工程—环境工程]