From illite/smectite clay to mesoporous silicate adsorbent for efficient removal of chlortetracycline from water

作     者：Wenbo Wang Guangyan Tian Li Zong Yanmin Zhou Yuru Kang Qin Wang Aiqin Wang 

作者机构：Center of Eco-materials and Green ChemistryLanzhou Institute of Chemical PhysicsChinese Academy of SciencesLanzhou 730000China University of the Chinese Academy of SciencesBeijing 100049China Key Laboratory of Clay Mineral Applied Research of Gansu ProvinceLanzhou 730000China College of Animal Science and TechnologyNanjing Agricultural UniversityNanjing 210095China 

出 版 物：《Journal of Environmental Sciences》 (环境科学学报（英文版）)

年 卷 期：2017年第29卷第1期

页      面：31-43页

核心收录：

学科分类：0830[工学-环境科学与工程（可授工学、理学、农学学位）] 081704[工学-应用化学] 07[理学] 08[工学] 070304[理学-物理化学(含∶化学物理)] 0817[工学-化学工程与技术] 0815[工学-水利工程] 0703[理学-化学] 

基　　金：the National Natural Science Foundation of China(Nos.51403221 and 21377135) the Jiangsu Provincial Joint Innovation and Research Funding of Enterprises,Colleges and Institutes(No.BY2015056-01) the Huai'an Cooperative Research Project of the Enterprises,Colleges and Institutes(No.HAC2015005) the Youth Innovation Promotion Association CAS(No.2016370)for financial support of this research 

主　　题：Illite/smectite clay Hybrid silicate adsorbent Chlortetracycline Removal 

摘      要：A series of mesoporous silicate adsorbents with superior adsorption performance for hazardous chlortetracycline（CTC） were sucessfully prepared via a facile one-pot hydrothermal reaction using low-cost illite/smectite（IS） clay,sodium silicate and magnesium sulfate as the starting *** this process,IS clay was ＂teared up＂ and then ＂rebuilt＂ as new porous silicate adsorbent with high specific surface area of 363.52 m^2/g（about 8.7 folds higher than that of IS clay） and very negative Zeta potential（- 34.5 mV）.The inert Si- O- Si（Mg,Al） bonds in crystal framework of IS were broken to form Si（Al）- O^- groups with good adsorption activity,which greatly increased the adsorption sites served for holding much CTC *** evaluation on adsorption properties reveals the optimal silicate adsorbent can adsorb 408.81 mg/g of CTC（only 159.7 mg/g for raw IS clay） and remove 99.3%（only 46.5%for raw IS clay） of CTC from 100 mg/L initial solution（pH 3.51;adsorption temperature 30℃;adsorbent dosage,3 g/L）.The adsorption behaviors of CTC onto the adsorbent follows the Langmuir isotherm model,Temkin equation and pseudo second-order kinetic *** mesopore adsorption,electrostatic attraction and chemical association mainly contribute to the enhanced adsorption *** a whole,the high-efficient silicate adsorbent could be candidates to remove CTC from the wastewater with high amounts of CTC.