改性牡蛎壳对磷吸附性能的研究  

Study on phosphorus adsorption properties of modified oyster shell

作　　者：马雨婷 孔宇[2] 管凛[2] 荆肇乾[1] MA Yuting;KONG Yu;GUAN Lin;JING Zhaoqian(College of Civil Engineering,Nanjing Forestry University,Nanjing 210037,China;Nanjing Municipal Design and Research Institute Co.,Ltd.,Nanjing 210008,China)

机构地区：[1]南京林业大学土木工程学院,江苏南京210037 [2]南京市市政设计研究院有限责任公司,江苏南京210008

出　　处：《应用化工》2024年第7期1519-1522,共4页Applied Chemical Industry

基　　金：国家科技支撑计划(2015BAL02B04);江苏省产学研合作项目(FZ20220028);南京市建设行业科技计划项目(KS22420)。

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AlCl_(3)改性浓度对牡蛎壳除磷效果,结果表明,0.5 mol/L AlCl_(3)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、AlCl_(3)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%,AlCl_(3)改性牡蛎壳的TP去除率最高。天然牡蛎壳、热改性牡蛎壳、AlCl_(3)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、AlCl_(3)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AlCl_(3)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。The influence of different modification methods of oyster shells on phosphorus adsorption properties were studied.The effect of different modified concentrations of AlCl_(3)on phosphorus removal in oyster shells was compared.The results showed that the phosphorus removal rate of 0.5 mol/L AlCl_(3)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 AlCl_(3)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 AlCl_(3)modified oyster shells were the highest.The adsorption of natural oyster shells,thermal modified oyster shells and AlCl_(3)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 AlCl_(3)modified oyster shell were 1.205,1.168 and 2.611,respectively,indicating that the adsorption reaction of phosphorus on AlCl_(3)modified oyster shell was easier than that on natural oyster shell and hot-modified oyster shell.

关 键 词：牡蛎壳 改性 除磷 吸附 

分 类 号：TQ127.1[化学工程—无机化工] TQ133.1