【摘要】 研究了不同牡蛎壳改性方式对磷吸附性能的影响。比较了不同AlCl₃改性浓度对牡蛎壳除磷效果，结果表明，0.5 mol/L AlCl₃改性牡蛎壳除磷率高达90%,处理后剩余污水磷浓度为0.05 mg/L。研究对比了天然牡蛎壳、热改性牡蛎壳、AlCl₃改性牡蛎壳对低浓度含磷污水的处理效果，其TP去除率分别为：63%～68%,61%～72%,83%～90%,AlCl₃改性牡蛎壳的TP去除率最高。天然牡蛎壳、热改性牡蛎壳、AlCl₃改性牡蛎壳的吸附均符合准二级动力学模型和Freundlich等温吸附模型，吸附过程既有物理吸附也有化学吸附。天然牡蛎壳、热改性牡蛎壳、AlCl₃改性牡蛎壳在Freundlich等温吸附模型中参数n值分别为：1.205,1.168,2.611,表明AlCl₃改性牡蛎壳对磷的吸附反应比天然牡蛎壳、热改性牡蛎壳对磷的吸附反应更容易进行。更多还原

【Abstract】 The influence of different modification methods of oyster shells on phosphorus adsorption properties were studied.The effect of different modified concentrations of AlCl₃ on phosphorus removal in oyster shells was compared.The results showed that the phosphorus removal rate of 0.5 mol/L AlCl₃ modified oyster shells was as high as 90%,and the phosphorus concentration of residual sewage after treatment was 0.05 mg/L.The study compared the treatment effects of natural oyster shells, hot-modified oyster shells and AlCl₃ modified oyster shells on low-concentration phosphorus containing wastewater.The TP removal rate were 63%～68%,61%～72% and 83%～90%,respectively, and the TP removal rate of AlCl₃ modified oyster shells were the highest.The adsorption of natural oyster shells, thermal modified oyster shells and AlCl₃ modified oyster shells conforms to the quasi-second-order kinetic model and Freundlich isothermal adsorption model, and the adsorption process includes both physical adsorption and chemical adsorption.In the Freundlich isothermal adsorption model, parameter n values of natural oyster shell, hot-modified oyster shell and AlCl₃ modified oyster shell were 1.205,1.168 and 2.611,respectively, indicating that the adsorption reaction of phosphorus on AlCl₃ modified oyster shell was easier than that on natural oyster shell and hot-modified oyster shell.更多还原