改性斜发沸石对含盐污水中氨氮和总磷吸附性能的研究  

STUDY ON ADSORPTION CHARACTERISTICS OF NH_3-N AND TP IN SALINE WATER BY MODIFIED CLINOPTILOLITE

作　　者：秦娟娟 刘如玲 杜晶 郭亚婵 郭好江 佘宗莲[1] 

机构地区：[1]海洋环境与生态教育部重点实验室,中国海洋大学环境科学与工程学院,266100 [2]青岛市团岛污水处理厂,山东青岛266002

出　　处：《水处理技术》2014年第10期32-37,共6页Technology of Water Treatment

基　　金：国家水体污染控制与治理科技重大专项(2009ZX07106-003)

摘　　要：研究了NaCl改性斜发沸石对含盐污水中NH3-N和TP的吸附特性,进行了等温吸附实验、不同盐度条件下的吸附实验和动态吸附实验。等温吸附实验结果显示,盐度为1.5%、温度为25℃条件下,改性沸石对NH3-N和TP的饱和吸附量分别为0.912 mg/g和0.504 mg/g,较未改性沸石分别高出81%和66%。盐度升高会降低2种沸石对NH3-N和TP的吸附量,但在各种盐度条件下,改性沸石对NH3-N和TP的去除率均高于未改性沸石,最高可分别高出8个和6个百分点左右。动态吸附实验中,NH3-N在第102天达到吸附饱和,动态饱和吸附量为0.587 mg/g;TP在第16天达到吸附饱和,动态饱和吸附量为7.551μg/g。This paper presents the study on adsorption characteristics of NH3-N and TP in saline water by NaCl-modified clinoptilolite, including isothermal adsorption experiments, adsorption experiments under different salinities and dynamic adsorption experiments. The results of isothermal adsorption experiments indicate that when the salinity is 1.5% and the temperature is 25 ℃, the adsorption capacity of ammonia nitrogen and TP by NaCl-modified clinoptilolite are 0.912 mg/g and 0.504 mg/g. It has a growth of 81% and 66% respectively compared with unmodified clinoptilolite. Increased salinity of the wastewater will reduce the adsorption efficiencies of pollutants, but in a variety of salinities, the removal rates of ammonia nitrogen and TP by modified clinoptilolite are about 8% and 6% higher respectively than unmodified clinoptilolite. In dynamic adsorption experiment, the adsorption equilibrium for ammonia nitrogen takes 98 days and the dynamic adsorption capacity is 0.65 mg/g, while the adsorption equilibrium for TP appears in the first 16 d and the dynamic adsorption capacity is 7.551 μg/g.

关 键 词：NaCl改性沸石 含盐污水 NH3-N和TP 动态吸附 

分 类 号：X703.1[环境科学与工程—环境工程]