期刊
ENVIRONMENTAL SCIENCE & TECHNOLOGY
卷 51, 期 13, 页码 7590-7598出版社
AMER CHEMICAL SOC
DOI: 10.1021/acs.est.7b00906
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资金
- Cornell University's David R. Atkinson Center for a Sustainable Future (ACSF)
- National Science Foundation [CHE-1541820]
- NSF [CHE-1413862]
- Direct For Mathematical & Physical Scien
- Division Of Chemistry [1413862] Funding Source: National Science Foundation
- Direct For Mathematical & Physical Scien
- Division Of Chemistry [1541820] Funding Source: National Science Foundation
The cost-effective and energy-efficient removal of organic micropollutants (MPs) from water and wastewater is challenging. The objective of this research was to evaluate the performance of porous beta-cyclodextrin polymers (P-CDP) as adsorbents of MPs in aquatic matrixes. Adsorption kinetics and MP removal were measured in batch and flow -through experiments for a mixture of 83 MPs at environmentally relevant concentrations (1 mu g L-1) and across gradients of pH, ionic strength, and natural organic matter (NOM) concentrations. Performance was benclunarked against a coconut-shell activated carbon (CCAC). Data reveal pseudo-second-order rate constants for most MPs, ranging between 1.5 and 40 g mg(-1) min(-1) for CCAC and 30 and 40000 g mg(-1) min(-1) for PCDP. The extent of MP removal demonstrates slower but more uniform uptake on CCAC and faster but more selective uptake on P-CDP. Increasing ionic strength and the presence of NOM had a negative effect on the adsorption of MPs to CCAC but had almost no effect on adsorption of MPs to P-CDP. P-CDP performed particularly well for positively charged MPs and neutral or negatively charged MPs with McGowan volumes greater than 1.7 (cm(3) mol(-1))/I00. These data highlight advantages of P-CDP adsorbents relevant to MP removal during water and wastewater treatment. (GRAPHICS)
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