文献类型：期刊文献

英文题名：Removal of arsenic contaminants using a novel porous nanoadsorbent with superior magnetic recovery

作者：Lin, Sen[1,2,3]; Jin, Junjie[1,2]; Sun, Shuying[1,2]; Yu, Jianguo[1,2]

机构：[1] National Engineering Research Center for Integrated Utilization of Salt Lake Resources, East China University of Science and Technology, Shanghai, China; [2] State Environmental Protection Key Laboratory of Environmental Risk Assessment and Control on Chemical Process, East China University of Science and Technology, Shanghai, China; [3] Shanghai Institute of Pollution Control and Ecological Security, Shanghai, China

年份：2020

卷号：8

外文期刊名：Chemical Engineering Science: X

收录：EI(收录号：20202908937488)

语种：英文

外文关键词：Sols - Magnetic materials - Superparamagnetism - Chemicals removal (water treatment) - Nanomagnetics - Iron oxides - Pollution control - Synthesis (chemical)

摘要：Novel porous and magnetic iron oxide nanoparticles (PMNPs) with good magnetic properties were synthesized through a simple sol–gel method and exhibited excellent adsorption performance for aqueous arsenic contaminants as well as magnetic recoverability. Hysteresis loop analysis confirmed that the PMNPs were typical superparamagnetic material with a ultrahigh magnetic saturation (Ms) of 94.77 emu/g, which allowed their quick and complete recovery even under magnetic fields less than 0.25 T. The kinetics and isotherms results confirmed that adsorption equilibrium could achieved in 30 min and the saturated adsorption capacities for As(III) and As(V) exceeded 0.64 and 0.76 mmol/g at 30 °C. The effects of initial pH and diverse co-existing ions demonstrated that the optimal conditions for arsenic removal were closely related to the PMNPs surface charge distribution and the electron density of As(III) and As(V). In addition, after 10 adsorption–desorption cycles, PMNPs still held more than 80% of the primal arsenic adsorption capacities. ? 2020