胶束
化学
肺表面活性物质
临界胶束浓度
水溶液中的金属离子
金属
纳滤
化学工程
重金属
十二烷基硫酸钠
结垢
膜
无机化学
废水
环境化学
色谱法
环境工程
水溶液
有机化学
环境科学
生物化学
工程类
作者
Xin Mao,Junlong Cai,Ruoxi Wu,Bin Liu
标识
DOI:10.1021/acs.est.4c03741
摘要
Toxic heavy metals are widely present in typical scenarios, such as mines and electroplating wastewater, presenting significant risks to biological and environmental safety. Membrane processes encounter a challenge in effectively intercepting heavy metals due to their small hydration radius. This research showcases the high efficiency of micelle-enhanced nanofiltration (MENF) in removing heavy metals. At the critical micelle concentration, sodium dodecyl sulfate demonstrated a high removal of Cu2+, Ni2+, Zn2+, and Cd2+ while maintaining substantial potential for complexation of heavy metals. The formation of micelles and the bonding of heavy metals with surfactants bolstered the resistance of heavy metal ions to transmembrane transport. The presence of heavy metals in ionic form in wastewater facilitated their complexation with surfactants or micelles. Notably, the valence state and concentration of interfering ions in the environment could slightly influence the removal of heavy metals by MENF. Additionally, MENF displayed remarkable antifouling properties. The loose gel layer created by surfactant molecules and the micelle enhanced the membrane permeability and reduced the scaling tendency of heavy metals. This study contributes to an improved understanding of the mechanisms involved in heavy metal rejection by using MENF.
科研通智能强力驱动
Strongly Powered by AbleSci AI