文献类型：期刊文献

英文题名：Equilibrium and kinetic studies on removal of cd2+ ion in aqueous solution by the multiple modified diatomite

作者：Wang, Hai[1]; Huang, Chengcai[1]; Qiu, Muqing[1]; Hu, Chunxia[2]

机构：[1] College of Life Science, Shaoxing University, Shaoxing, 312000, China; [2] Department of Pharmacy and Health, Shaoxing University Yuanpei College, Shaoxing, 312000, China

年份：2017

卷号：16

期号：4

起止页码：1249

外文期刊名：Nature Environment and Pollution Technology

收录：EI(收录号：20175204568473)、Scopus(收录号：2-s2.0-85038561880)

基金：This study was financially supported by the “National Natural Science Foundation of China (No.31500321)”.

语种：英文

外文关键词：Bakeries - Isotherms - Kinetic theory - Kinetics - Metal ions - Metals - Sodium hydroxide - Wastewater treatment

外文摘要：The problem of metal pollution was regarded by many researchers for a long time. The wastewater containing metal ions must be treated. A composite modification technology of acid activating, sodium hydroxide and baking was applied to improve the diatomite adsorption ability, and a modified diatomite was prepared. The adsorption experiment of the metal wastewater by the modified diatomite was carried out in detail. The modified diatomite owned the high adsorption capacity of the Cd2+ ion. The operating parameters, such as contact time, concentration of Cd2+ ion and reaction temperature, had an important effect on the removal of the Cd2+ ion in aqueous solution. The adsorption of Cd2+ ions onto the modified diatomite was 9.65 mg/g. The adsorption process fits well with the Langmuir isotherm model and the pseudo-second-order kinetics model and it implied that the adsorption was mainly a physical process. The adsorption process is chemisorption, which involves a sharing of electrons between the adsorbate and the surface of the adsorbent.