Journal
ACS APPLIED MATERIALS & INTERFACES
Volume 12, Issue 10, Pages 12165-12175Publisher
AMER CHEMICAL SOC
DOI: 10.1021/acsami.0c00597
Keywords
beta-cyclodextrin; multifunctional; green synthesis; adsorption; waste water
Funding
- Major Science and Technology Program for Water Pollution Control and Treatment of China [2015ZX07204, 2017ZX07602]
- Nat i o n a l Key R&D Program of China [2016YFE0112300]
- Natural Science Foundation of Jiangsu Province [BK20151378, BE2015708]
- National Natural Science Foundation of China [41203062, 51438008]
- Fundamental Research Funds for the Central Universities [090514380001]
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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 beta-cyclodextrin polymer (beta-CDP) is successfully synthesized in the aqueous phase. The N-2 and CO2 adsorption/desorption analysis showed that the polymer mainly contains ultra-micropores (<1 nm), with a Langmuir surface area of 89 m(2) 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 beta-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, beta-CDP can simultaneously remove these pollutants without competitive adsorption. The maximum adsorption capacity of beta-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, beta-CDP also showed excellent bactericidal properties due to the quaternary ammonium groups. At a concentration of 15 g L-1, beta-CDP can remove 98% of the tested Escherichia coli. Moreover, the synthesis of beta-CDP is simple, green, and easy to industrialize. All of these findings indicate that beta-CDP, as an ideal multifunctional material, presents potential for practical applications for water treatment and disinfection.
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