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Multifunctional β-Cyclodextrin Polymer for Simultaneous Removal of Natural Organic Matter and Organic Micropollutants and Detrimental Microorganisms from Water.
ACS Applied Materials & Interfaces ( IF 8.3 ) Pub Date : 2020-02-27 , DOI: 10.1021/acsami.0c00597
Xuejiao Hu 1 , Guizhou Xu 1 , Huaicheng Zhang 1 , Meng Li 1 , Yizhou Tu 1 , Xianchuan Xie 1 , Yuanting Zhu 1 , Lu Jiang 1 , Xingqi Zhu 1 , Xiaowen Ji 1 , Yan Li 1 , Aimin Li 1
Affiliation  

Natural organic matter (NOM), organic micropollutants (OMPs), and detrimental microorganisms are three major pollutants that affect water quality. To remove these pollutants, a quaternary ammonium-functionalized β-cyclodextrin polymer (β-CDP) is successfully synthesized in the aqueous phase. The N2 and CO2 adsorption/desorption analysis showed that the polymer mainly contains ultra-micropores (<1 nm), with a Langmuir surface area of 89 m2 g-1. Two kinds of NOM, humic acid and fulvic acid, and five OMPs, 2-naphthol (2-NO), 3-phenylphenol (3-PH), 2,4,6-trichlorophenol (2,4,6-TCP), bisphenol A (BPA), and bisphenol S (BPS), were selected as model pollutants to study the performance of β-CDP and three kinds of commercial adsorbents, including granular activated carbon, DARCO-AC, and two resins, XAD-4 and D-201, were used for comparison. The polymer shows ultrarapid adsorption kinetics for the removal of these pollutants, with pseudo-second-order rate constants two to three orders of magnitude higher than that of the commercial activated carbon and resins. Due to the different adsorption sites of NOM and OMPs, β-CDP can simultaneously remove these pollutants without competitive adsorption. The maximum adsorption capacity of β-CDP for HA, FA, 2-NO, 3-PH, 2,4,6-TCP, BPA, and BPS based on the Langmuir model is 40, 166, 74, 101, 108, 103, and 117 mg g-1, respectively. After use, the polymer can be easily regenerated at room temperature. In addition, β-CDP also showed excellent bactericidal properties due to the quaternary ammonium groups. At a concentration of 15 g L-1, β-CDP can remove 98% of the tested Escherichia coli. Moreover, the synthesis of β-CDP is simple, green, and easy to industrialize. All of these findings indicate that β-CDP, as an ideal multifunctional material, presents potential for practical applications for water treatment and disinfection.

中文翻译:

多功能β-环糊精聚合物,可同时去除水中的天然有机物和有机微污染物及有害微生物。

天然有机物(NOM),有机微污染物(OMP)和有害微生物是影响水质的三种主要污染物。为了去除这些污染物,在水相中成功合成了季铵官能化的β-环糊精聚合物(β-CDP)。N2和CO2吸附/解吸分析表明,该聚合物主要含有超微孔(<1 nm),Langmuir表面积为89 m2 g-1。腐殖酸和富里酸两种NOM,以及五种OMP,2-萘酚(2-NO),3-苯基苯酚(3-PH),2,4,6-三氯苯酚(2,4,6-TCP),选择双酚A(BPA)和双酚S(BPS)作为模型污染物,以研究β-CDP和三种商用吸附剂的性能,包括颗粒状活性炭,DARCO-AC和两种树脂XAD-4和XAD。 D-201用于比较。该聚合物显示出用于去除这些污染物的超快速吸附动力学,其伪二级速率常数比市售活性炭和树脂的二级常数高2-3个数量级。由于NOM和OMP的吸附位置不同,β-CDP可以同时去除这些污染物而没有竞争性吸附。根据Langmuir模型,β-CDP对HA,FA,2-NO,3-PH,2,4,6-TCP,BPA和BPS的最大吸附容量为40、166、74、101、108、103和117 mg g-1分别。使用后,该聚合物可以在室温下容易地再生。此外,由于季铵基团的存在,β-CDP也显示出优异的杀菌性能。在15 g L-1的浓度下,β-CDP可以去除98%的测试大肠杆菌。而且,β-CDP的合成简单,绿色,并且易于工业化。所有这些发现表明,β-CDP作为一种理想的多功能材料,在水处理和消毒的实际应用中具有潜力。
更新日期:2020-02-28
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