摘要
选用NF-C和NF-75两种纳滤膜对药物及个人护理品(PPCPs)进行纳滤实验,考察纳滤膜对PPCPs的截留机理。结果表明:纳滤膜去除PPCPs是由筛分作用、静电作用和吸附作用共同决定的。当PPCPs为非解离亲水性物质时,纳滤膜对PPCPs的去除机理主要为筛分作用;当PPCPs为非解离疏水性物质时,纳滤膜对PPCPs的去除机理为吸附作用。当PPCPs为可解离性物质时,纳滤膜对PPCPs的静电作用随着pH的升高而逐渐增强,纳滤膜的截留率逐渐升高。
Two kinds of nanofiltration membranes, NF-C and NF-75, were used to conduct nanofiltration tests on drugs and personal care products(PPCPs) and the rejection mechanism of PPCPs by nanofiltration membranes was also investigated. The results showed that the removal of PPCPs by the nanofiltration membrane was determined by the sieving effect, electrostatic effect and adsorption effect. When PPCPs were non-dissociated hydrophilic substances, the removal mechanism of PPCPs by nanofiltration membranes was mainly sieving;when PPCPs were non-dissociated hydrophobic substances, the removal mechanism of PPCPs by nanofiltration membranes was adsorption. When PPCPs were dissociable substances,the electrostatic effect of nanofiltration membranes on PPCPs gradually increased with the increase of pH, and the rejection rate of nanofiltration membranes gradually increased.
作者
汤遵伟
丰桂珍
TANG Zunwei;FENG Guizhen(School of Civil Engineering and Architecture,East China Jiaotong University,Nanchang 330013,China)
出处
《水处理技术》
CAS
CSCD
北大核心
2022年第7期112-116,共5页
Technology of Water Treatment
基金
国家自然科学基金项目(51868019)。
关键词
纳滤膜
PPCPS
截留率
截留机理
nanofiltration
PPCPs
rejection rate
mechanism of rejection
