化工进展2023，Vol.42Issue(11)：5981-5992,12.DOI:10.16085/j.issn.1000-6613.2022-2259
废白土衍生吸附剂协同去除水中的四环素和铜
Adsorbent derived from spent bleaching earth for the synergistic removal of tetracycline and copper in wastewater
摘要
Abstract
In order to efficiently utilize the spent bleaching earth produced by the edible oil industry,a novel adsorbent was prepared by transforming spent bleaching earth into BE500 and BE700 to remove the copper ions(Cu2+)and tetracycline(TC)that commonly existed in livestock and poultry wastewater.The effects of adsorbent dosage,pH,ionic strength,and competition adsorption under the binary system was investigated.The results showed that BE700 was more suitable for Cu2+ adsorption,while BE500 exhibited higher removal efficiency for TC.Compared with Cu2+,the adsorption capacity of TC was less sensitive to the changes in the pH of the reacted solution.The results of kinetic models pointed out that the adsorption of BE500 and BE700 for Cu2+ and TC could be mainly attributed to the chemical reaction,and the liquid-film diffusion controlled the whole adsorption rate.The adsorption isotherms and thermodynamics model indicated that Cu2+ and TC were multi-layered immobilized on the surface of BE500 and BE700,and the adsorption was spontaneous with an endothermic process.In addition,the ion interference experiment showed that the co-existed of Cl-and Na+ posed an insignificant role in influencing the adsorption performance for Cu2+ and TC.The Cu2+ and TC adsorption capacity of BE500 and BE700 was significantly enhanced under the binary system compared to that in the single system,which meant that the Cu2+ and TC presented a synergistic effect due to the reaction between Cu2+ and TC.The characterizations suggested that the pore-filling,ion exchange,complexation,hydrogen bond and π-π electron donor-acceptor interaction might participated in the removal mechanism of Cu2+ and TC.关键词
废白土/吸附剂/四环素/铜/协同去除Key words
spent bleaching earth/adsorbent/tetracycline/copper/synergistic removal分类
资源环境引用本文复制引用
柯玉鑫,朱晓丽,司绍诚,张婷,王军强,张子夜..废白土衍生吸附剂协同去除水中的四环素和铜[J].化工进展,2023,42(11):5981-5992,12.基金项目
国家重点研发计划(2021YFC1808902) （2021YFC1808902）
陕西省重点研发计划(2019NY-200,2020ZDLNY06-06,2020ZDLNY07-10) （2019NY-200,2020ZDLNY06-06,2020ZDLNY07-10）
西安市科技计划(2019-GXYD18.9,20193057YF045NS045) （2019-GXYD18.9,20193057YF045NS045）
陕西省农业科技创新项目(NYJK-2022-XA-02). （NYJK-2022-XA-02）
