胺基改性沸石同步净化水中的硝酸盐和总磷  

Amine-modified zeolite synchronously cleans nitrate and total phosphorus from water

作　　者：崔鹤 陈云嫩[1] 刘晨[1] 彭志业 CUI He;CHEN Yun-nen;LIU Chen;PENG Zhi-ye(Jiangxi Provincial Key Laboratory of Environmental Pollution Control in Mining and Metallurgy,Jiangxi University of Science and Technology,Ganzhou 341000,China)

机构地区：[1]江西理工大学,江西省矿冶环境污染控制重点实验室,江西赣州341000

出　　处：《中国环境科学》2023年第11期5765-5776,共12页China Environmental Science

基　　金：国家自然科学基金资助项目(51864021)。

摘　　要：以天然沸石(Z)为载体,以胺基基团负载天然沸石(Z)获得改性沸石(ZOC).通过静态吸附、解吸实验和SEM、FTIR表征手段对ZOC的性质进行分析.结果表明,在吸附温度25℃、pH 4~9、ZOC投加量为4g/L(单独除磷ZOC投加量为0.6g/L),硝酸盐(N)和总磷(TP)初始浓度分别为50和2mg/L时,同步(单独)净化硝酸盐和总磷的去除率分别在83%和96%以上.解吸剂为0.5mol/L NaCl,硝酸盐和总磷的解吸率分别在99%和97%以上,且经过5次吸附-解吸再生-吸附循环,硝酸盐和总磷的去除率仍可达到85.7%和98.96%.ZOC对硝酸盐和总磷吸附行为符合Langmuir等温模型,吸附过程符合准二级动力学模型;ZOC同步(单独)净化硝酸盐和总磷机理涉及静电吸引和离子交换.In this paper,modified zeolite(ZOC)was obtained by loading natural zeolite(Z)with amine group.The properties of ZOC were analyzed by static adsorption,desorption experiment,and SEM,FTIR analysis.The results showed that when the adsorption temperature was 25℃,pH was 4~9,ZOC dosage was 4g/L(ZOC dosage was 0.6g/L for single phosphate removal),and the initial concentrations of nitrate(N)and total phosphorus(TP)were 50 and 2 mg/L respectively,the removal rates of N and TP were above 83%and 96%,respectively.With 0.5 mol/L NaCl as the desorption agent,the desorption rates of N and TP were above 99%and 97%,respectively,and the removal rates of N and TP could still reach 85.7%and 98.96%after 5 times of adsorption-desorption cycles.The adsorption behavior of N and TP by ZOC conformed to Langmuir isotherm model,and the adsorption process were conformed to the pseudo-second-order kinetic model.ZOC synchronous(alone)purification of N and TP mechanism involved electrostatic attraction and ion exchange.

关 键 词：胺基基团 同步净化 硝酸盐和总磷 净化机理 

分 类 号：X703[环境科学与工程—环境工程]