文献类型：期刊文献

中文题名：Cd(II)

英文题名：Distinguished Cd(II) Capture with Rapid and Superior Ability using Porous Hexagonal Boron Nitride: Kinetic and Thermodynamic Aspects

作者：Li Li[1];Guo Xiaojie[2];Jin Yang[1];Chen Chaogui[1];Asiri, Abdullah M.[3];Marwani, Hadi M.[3];Zhao Qingzhou[4];Sheng Guodong[1]

机构：[1]Shaoxing Univ, Coll Chem & Chem Engn, Shaoxing 312000, Peoples R China;[2]Hangzhou Dianzi Univ, Coll Mat & Environm Engn, Hangzhou 310018, Peoples R China;[3]King Abdulaziz Univ, Fac Sci, Chem Dept, Jeddah 21589, Saudi Arabia;[4]Univ Chinese Acad Sci, Coll Resources & Environm, Beijing 100049, Peoples R China

年份：2020

卷号：35

期号：3

起止页码：284

外文期刊名：JOURNAL OF INORGANIC MATERIALS

收录：SCI-EXPANDED(收录号：WOS:000540998700005)、、EI(收录号：20201608479301)、WOS

基金：National Natural Science Foundation of China(21777102)

语种：英文

外文关键词：boron nitride; adsorption; cadmium; heavy metal ion

外文摘要：In present work, a systematical and comprehensive understanding for the adsorption of Cd(II) on porous hexagonal boron nitride (p-BN) was studied. The chemical compositions, morphology and surface functional groups of p-BN before and after adsorption were characterized by SEM, HRTEM, BET, XRD, and FT-IR. The effects of pH, adsorbent dosage, contact time and temperature on Cd(II) adsorption were investigated. The maximum adsorption capacity for Cd(II) achieves 184 mg.g(-1) at pH 7.0 and 313 K. The kinetic data fitted well with pseudo-second-order model and intra-particle diffusion model, indicating that the adsorption is mainly controlled by chemisorption, and the rate-limiting step is the molecular diffusion. The adsorption isotherms are in accordance with Freundlich and Langmuir model respectively, suggesting Cd(II) adsorbed on the heterogeneous surface through multilayer and monolayer adsorption. The thermodynamic parameters are calculated to confirm the spontaneous and endothermic process of Cd(II) sorption. Spectroscopic results from XPS imply that p-BN adsorbent had substantial functional groups and bonding sites, which is propitious to uptake Cd(II) from wastewater. These results revealed that p-BN is a promising candidate for Cd(II) scavenging.