摘要
水铁矿(Fh)因其比表面积大、吸附能力强等优点,对络合态重金属表现出良好的吸附能力,但是盐离子的存在会阻碍Fh对络合态重金属的去除。本研究引入了二硫化钼(MoS_(2)),利用其优异的阻盐能力弥补Fh去除性能被抑制的情况。考察了溶液pH、盐度等不同因素对MoS_(2)/Fh复合材料吸附性能的影响,在15 g/L NaCl的背景盐度、pH=4条件下,1 g/L MoS_(2)/Fh复合材料对20 mg/L EDTA-Pb(Ⅱ)的去除率仍能达到96.72%,较相同条件下Fh的去除率显著提高。通过对吸附机理的探究发现EDTA-Pb(Ⅱ)主要以静电吸附方式被去除。
Due to its large specific surface area and strong adsorption capacity,ferrihydrite(Fh) shows good adsorption capacity for heavy metal complexes,but the existence of salt ions will hinder the removal of heavy metal complexes by Fh.This study introduces molybdenum disulfide(MoS_2) to use its excellent salt resistance capacity to compensate for the inhibition of Fh removal performance.The influence of different factors such as solution pH and salinity on the adsorption performance of MoS_2/Fh composite material was investigated,under the background salinity of 15 g/L NaCl and pH=4,the removal rate of 1 g/L MoS_2/Fh composite material to 20 mg/L EDTA-Pb(Ⅱ) was still 96.72%,which significantly improved the removal rate of Fh under the same conditions.By exploring the adsorption mechanism,it was found that EDTA-Pb( Ⅱ) was mainly removed by electrostatic adsorption.
作者
陆静宇
孙晓蕾
胡雅
孙秀云
LU Jingyu;SUN Xiaolei;HU Ya;SUN Xiuyun(School of Environmental and Biological Engineering,Nanjing University of Science and Technology;Jiangsu Key Laboratory of Chemical Pollution Control and Resources Reuse:Nanjing 210094,China)
出处
《水处理技术》
CAS
CSCD
北大核心
2024年第5期30-34,40,共6页
Technology of Water Treatment
基金
江苏省自然科学基金资助项目(SBK2016020889)。
