水资源保护2018，Vol.34Issue(3)：104-110,7.DOI:10.3880/j.issn.1004-6933.2018.03.17
Cu2+对凤眼莲根系吸附四环素的影响及机理
Effects of Cu2+ on adsorption of tetracycline on roots of eichhornia crassipes
摘要
Abstract
Using eichhornia crassipes roots as biological adsorbent,kinetics and adsorption isotherms of tetracycline (TC) adsorbed on eichhornia crassipes root under copper coexistence were discussed through an adsorption equilibrium experiment.Combined with Fourier transform infrared spectroscopy (FTIR) and group shielding technology,the effect and mechanism of Cu2+ on the adsorption of TC on eichhornia crassipes roots was analysed.The results show that co-adsorption kinetics and adsorption thermodynamics accord with quasi two stage kinetic model and Freundlich isothermal adsorption model.The absorption capacity of TC on eichhornia crassipes roots increases with the increase of Cu2+ concentration.When the hydroxyl and amino groups on eichhornia crassipes roots were chemically shielded,the adsorption capacity of TC decreased by 20％ ～ 30％.Using FTIR technique,it was found that Cu2+ formed a bridge between roots and TC through its interaction with hydroxyl,carboxyl,amino,and aromatic structures.Thus,the adsorption of TC on eichhornia crassipes roots was promoted.关键词
凤眼莲根系/四环素/铜/络合/吸附Key words
Eichhornia crassipes root/tetracycline/Cu/complexation/sorption分类
资源环境引用本文复制引用
汤贝贝,张振华,卢信,唐婉莹,刘丽珠,范如芹..Cu2+对凤眼莲根系吸附四环素的影响及机理[J].水资源保护,2018,34(3):104-110,7.基金项目
国家自然科学基金(31500436) （31500436）
江苏省农业科技创新基金(CX(16)1051) （CX(16）
