文献类型：期刊文献

英文题名：Adsorption of copper ions in aqueous solution by montmorillonite-biochar composite

作者：Cai, Yuanyuan[1]; Du, Yaowei[1]; Wang, Yue[1]; Song, Jun[1]; Liu, Bing[1]; Zhang, Chenhu[1]; Qiu, Muqing[1]

机构：[1] College of Life Science, Shaoxing University, Shaoxing, 312000, China

年份：2019

卷号：18

期号：4

起止页码：1201

外文期刊名：Nature Environment and Pollution Technology

收录：EI(收录号：20195107838058)、Scopus(收录号：2-s2.0-85076359177)

基金：This study was financially supported by the Project of Science and Technology Plan in Shaoxing City (2017B70058).

语种：英文

外文关键词：Chemical analysis - Clay minerals - Copper - Crystallography - Fourier transform infrared spectroscopy - Kinetics - Mesoporous materials - Metal ions - Nanocrystalline materials - Oilseeds

外文摘要：A composite adsorbent was prepared by montmorillonite and biochar from peanut shell. The adsorption experiment of the Cu2+ ions from aqueous solution by the montmorillonite-biochar composite was carried out in detail. The effects of initial concentration of Cu2+ ions in aqueous solution and contact time on adsorption efficiency were studied. FTIR spectroscopy, SEM and TEM analyses, standard N2 adsorption-desorption techniques, EDS and XPS were used to evaluate the physico-chemical, textural and crystalline properties of the montmorillonite-biochar composite. Results showed that the montmorillonite-biochar composite was mesoporous material. The surface of montmorillonite-biochar composite was rough with irregular layer structure. According to the experimental data, pseudo first order kinetics model and pseudo second order kinetics model were applied. The adsorption process fits well with the pseudo second order kinetics model. The predominant process is chemisorption, which involves a sharing of electrons between the adsorbate and the surface of the adsorbent. Adsorption data were correlated well by Freundlich isotherm models and adsorption process was chemical. It is concluded that the montmorillonite-biochar composite can be used as an effective adsorbent for the removal of Cu2+ ions from aqueous solutions. ? 2019 Technoscience Publications. All rights reserved.