Ultrahigh selective adsorption of zwitterionic PPCPs both in the absence and presence of humic acid: Performance and mechanism
Ultrahigh selective adsorption of zwitterionic PPCPs both in the absence and presence of humic acid: Performance and mechanism
复制标题
在不存在和存在腐殖酸的情况下两性离子 PPCP 的超高选择性吸附：性能和机制
DOI：
10.1016/j.jhazmat.2018.01.036
复制
发表时间：
2018-04-15
影响因子：
13.6
通讯作者：
Li, Aimin
中科院分区：
文献类型：
--
作者：
Jin, Jing;Feng, Tianyu;Li, Aimin
由于两性离子PPCPs可以与腐殖酸（HA）结合，导致某些污染物残留在水溶液中，因此需要与两性离子PPCPs具有更强结合的吸附剂来避免这种现象。通过对MA10、MA30、MA40和MA70等系列磁性羧基改性超高交联树脂的比较，发现MA50对四环素类和喹诺酮类抗生素等两性离子型PPCPs具有选择性吸附，这是由于阳离子交换作用和非离子交换作用产生的协同效应所致。为了考察HA对四环素（TC）和环丙沙星（CPX）的吸附效果，选择超高交联树脂Q100、胺化超高交联树脂GMA50、阴离子交换树脂MIEX、木质活性炭F400D和煤基活性炭Norit 5种吸附剂与MA50进行比较。事实证明，对于所研究的吸附剂，水溶液中CPX或TC与HA结合的百分比变化很大。MIEX、F400D等商品吸附剂在吸附过程中存在严重的吸附假阳性，而MA50的吸附假阳性相对较低，保证了出水的最大安全性。突破性试验表明，MA50在环境浓度下对PPCPs具有明显的去除优势，具有应用于真实的水体的潜力。
Since zwitterionic PPCPs could be combined with humic acid (HA) leading to certain contaminants residue in aqueous solution, adsorbents with much stronger binding with zwitterionic PPCPs were needed to avoid this phenomenon. Through comparison of serial magnetic carboxyl modified hypercrosslinked resins including MA10, MA30, MA40 and MA70, MA50 was found to exhibit ultrahigh selective adsorption of zwitterionic PPCPs including tetracycline and quinolone antibiotics due to the remarkable synergistic effects generated from cation exchange interaction and non-ion exchange interaction. To figure out the effect of HA, other five adsorbents including hypercrosslinked resin Q100, aminated hypercrosslinked resin GMA50, anion exchange resin MIEX, wood-based activated carbon F400D and coal-based activated carbon Norit were chosen as comparison to MA50 in adsorption performance of tetracycline (TC) and ciprofloxacin (CPX). It turned out that the percentage of CPX or TC combined with HA in aqueous solution varied greatly for studied adsorbents. There existed serious false positive adsorption during the adsorption process by some commercial adsorbents such as MIEX and F400D, while MA50 exhibited relatively lower false-positive adsorption, ensuring the maximum safety of effluents. Breakthrough tests showed that MA50 had significant advantages in PPCPs removal at environment concentration, indicating its potential in application for real water.