HDTMA改性沸石强化尾水氮磷吸附性能研究  

Enhancement of nitrogen and phosphorus adsorption in tail water by HDTMA modified zeolite

作　　者：胡美嘉 孔宇[2] 管凛[2] 荆肇乾[1] HU Mei-jia;KONG Yu;GUAN Lin;JING Zhao-qian(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》2023年第5期1339-1342,共4页Applied Chemical Industry

基　　金：国家科技支撑计划(2015BAL02B04);住房和城乡建设部科学技术计划项目(2015-K7-012);南京市建设行业科技计划项目(KS22420)。

摘　　要：采用阳离子表面活性剂十六烷基三甲基溴化铵(HDTMA)对天然沸石进行改性,研究HDTMA质量浓度、沸石粒径等因素对HDTMA改性沸石在低污染废水中同时吸附NH_(4)^(+)-N、NO_(3)^(-)-N和PO_(4)^(3-)-P三种污染物的影响。结果表明,沸石粒径为80~100目,HDTMA质量浓度为10 g/L,改性沸石投加量为20 g/L时,HDTMA改性沸石对NO_(3)^(-)-N和PO_(4)^(3-)-P的去除率最高,为87.07%和95.24%,但对NH_(4)^(+)-N吸附能力明显降低。沸石粒径为80~100目、HDTMA质量浓度为5 g/L时,HDTMA改性沸石既对PO_(4)^(3-)-P具有较高的吸附能力,又能够保持对NO_(3)^(-)-N和NH_(4)^(+)-N较高的去除率。HDTMA改性沸石的吸附遵循Langmuir等温吸附模型以及准二级动力学模型。利用HDTMA改性沸石可实现污水厂尾水中氮磷的同步高效去除。Natural zeolite was modified by HDTMA.The effects of mass concentration of HDTMA and particle size of zeolite on simultaneous adsorption of NH_(4)^(+)-N,NO_(3)^(-)-N and PO_(4)^(3-)-P by HDTMA modified zeolite were studied.The results showed that when the zeolite particle size is 80~100 mesh and the mass concentration of HDTMA is 10 g/L,the modified zeolite dosage is 20 g/L,the removal rate of NO_(3)^(-)-N and PO_(4)^(3-)-P by HDTMA modified zeolite reach 87.07%and 95.24%,but the adsorption capacity of NH_(4)^(+)-N is significantly reduced.When the particle size of zeolite is 80~100 mesh and the mass concentration of HDTMA is 5 g/L,HDTMA modified zeolite not only has good adsorption capacity for PO_(4)^(3-)-P,but also can maintain a high removal rate of NH_(4)^(+)-N.The adsorption of HDTMA-modified zeolite follows the Langmuir isothermal adsorption model,which is in good agreement with the quasi-second-order kinetic model.Simultaneous and efficient removal of NH_(4)^(+)-N,NO_(3)^(-)-N and PO_(4)^(3-)-P in low pollution water can be realized by using HDTMA modified zeolite.

关 键 词：改性沸石 氨氮 硝氮 磷酸盐 污水厂尾水 

分 类 号：TQ424[化学工程] X703[环境科学与工程—环境工程]