改性沸石联合聚合氯化铝处理生活污水效果和机理研究  

The Effect and Mechanism of Modified Zeolite Combined with Polymerization Aluminum Chloridein Sewage Treatment

作　　者：冯炘[1] 王璐[1] 解玉红[1] 

机构地区：[1]天津理工大学环境科学与安全工程学院,天津300384

出　　处：《水处理技术》2016年第6期42-46,共5页Technology of Water Treatment

基　　金：2009年天津市自然科学基金重点项目(09JCZDJC26200)

摘　　要：采用氢氧化钠和氯化镁溶液浸渍、煅烧对沸石进行改性,联合聚合氯化铝(PAC)吸附处理生活污水中NH_3-N和TP,并通过扫描电镜和等温吸附实验,分析改性前后沸石的表面特征和吸附特点。结果表明,沸石改性条件设定为改性沸石与PAC的投加比例是1:1,吸附时间是60 min,污水p H是6,吸附温度是20℃时,污水中NH_3-N的去除率是83.7%,TP的去除率是92.4%,处理效果最好。改性沸石联合PAC对NH_3-N的吸附符合Langmuir等温吸附模型,属于单分子层吸附;改性沸石联合PAC对TP的吸附符合Freundlich模型,NH_3-N的最大吸附量由6.29 mg/g上升到11.55 mg/g。实验过程并没有添加有毒物质,可为生活污水的无害化处理提供依据。Using hydroxide and magnesium chloride impregnation, calcining zeolite combined with polymerization aluminum chloride to reduce the content of NH3-N and TP in sewage treatment. The surface characteristics and adsorption characteristics of natural and modified zeolite were analyzed by scanning electron microscope and isothermal adsorption experiment at different temperatures. The results show that when the modification conditions of zeolite set at the ratio of modified zeolite and polymerization aluminum chloride was 1：1, the adsorption time was 60 min, the p H of sewage was 6,the adsorption temperature was 20 ℃, the maximum removal rate of NH3-N was 83.7%,the maximum removal rate of TP was 92.4%. The adsorption of NH3-N using modified zeolite and PAC follows the Langmuir isotherm mode, belongs to single layer adsorption. The adsorption process of TP was in accordance with Freundlich model, the maximum adsorption capacity of NH3-N increased from 6.29 mg/g to 11.55 mg/g. This study did not add the toxic substances, which provided a basis for the harmless treatment of domestic sewage.

关 键 词：改性沸石 投加量 表面特征 聚合氯化铝 

分 类 号：X799.3[环境科学与工程—环境工程]