环境工程学报2011，Vol.5Issue(12)：2681-2686,6.
不同硅铝比的ZSM-5型沸石分子筛吸附水中Cu2＋离子的研究
Study on adsorption of Cu2＋ from aqueous solution by ZSM-5 molecular sieve of different SiO2/Al2O3 ratios
摘要
Abstract
Adsorption of Cu2＋ from aqueous solution by three kinds of ZSM-5 molecular sieve （25H, 38H, 50H, 25, 38 and 50 were SiO2/Al2O3 ratio） was investigated. The results showed that the ZSM-5 molecular sieves could adsorb Cu2＋ from aqueous solution effectively. The adsorption process attributes to pseudo seeond- order kinetics model and the equilibrium isotherm for Cu2＋ uptake corresponds closely to the Langmuir model. The corresponding sequence of adsorption rate and capacity was： 25H 〉 50H 〉 38H. The maximum adsorption eapaeity of 25H was up to 12.83 mg/g. As the adsorbent dosage inereased from 0.8 g/L to 2.0 g/L, the removal rate in- creased from 87.0% to 97.5% eorrespondingly. The common cations could affect the adsorption process, the corresponding sequence was Pb2＋ 〉 K ＋ 〉 Na ＋ 〉 Mg2＋. And higher eoncentration of eo-existing cation had greater influence on adsorption removal efficiency. The SiO2/Al2O3 ratio and morphology features both have influenee on Cu2＋ adsorption, small pore size disbennifits adsorption, and low SiO2/Al2O3 ratio facilitates adsorption.关键词
沸石分子筛/硅铝比/吸附/铜离子Key words
ZSM-5 molecular sieve/SiO2/Al2O3 ratio/adsorption/Cu2＋分类
资源环境引用本文复制引用
万东锦,袁海静,曲丹,王洪杰,陈静,刘永德..不同硅铝比的ZSM-5型沸石分子筛吸附水中Cu2＋离子的研究[J].环境工程学报,2011,5(12):2681-2686,6.基金项目
基金项目：国家高技术研究发展计划（863）项目 （）
北京林业大学青年科技启动基金 （）
河南工业大学博士基金 （）
高等学校博士学科点专项科研基金 （）
