四种人工湿地基质对磷的吸附特性研究  

Adsorption Characteristics of Four Kinds of Constructed Wetland Substrate on Phosphorus

作　　者：谢勇丽[1] 曾霞[1] 张红梅 Xie Yongli;Zeng Xia;Zhang Hongmei(Engineering & Technical College, Chengdu University of Technology, Leshan 614000, China)

机构地区：[1]成都理工大学工程技术学院,四川乐山614000

出　　处：《环境科学与管理》2020年第3期99-103,共5页Environmental Science and Management

基　　金：院级青年科学基金(C122015006)。

摘　　要：为筛选更优质的人工湿地基质,通过等温吸附和动态吸附实验,测定沸石、砖渣、火山石和陶粒四种湿地基质对磷的吸附量,确定其吸附特性。结果表明,四种基质吸附强度的大小顺序是火山石>沸石>陶粒>砖渣,吸附能力的大小顺序是砖渣>火山石>陶粒>沸石。由Elovich方程的吸附速率常数k可知,四种基质对磷的吸附速率大小依次为陶粒>砖渣>沸石>火山石。四种基质均在偏酸性条件下(即pH=5),对磷的去除效率和吸附量达到最高,且砖渣的去除效率最高。In order to select better constructed wetland substrate,the adsorption characteristics of zeolite,brick slag,volcanic stone and ceramsite were determined by isothermal adsorption experiments and dynamic adsorption experiments.The results show that,the order of the adsorption strength of the four substrates is volcanic rock>zeolite>ceramsite>brick slag,and the order of adsorption capacity is brick slag>volcanic stone>ceramsite>zeolite.From the adsorption rate constant k of the Elovich equation,the adsorption rates of phosphorus in the four substrates were in the order of>clay>zeolite>volcanic rocks.The removal efficiency and adsorption capacity of phosphorus were the highest in the acidic conditions(pH=5),and the removal efficiency of the brick slag was the highest.

关 键 词：人工湿地 湿地基质 磷 吸附曲线 

分 类 号：X703.1[环境科学与工程—环境工程]