期刊
CHEMOSPHERE
卷 80, 期 6, 页码 647-651出版社
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.chemosphere.2010.04.053
关键词
Adsorption; PFOS; Polymers; Sorption isotherm; Sorption kinetics
资金
- Grants-in-Aid for Scientific Research [22360214] Funding Source: KAKEN
Perfluorooctane sulfonate (PFOS) is the latest chemical categorized as persistent organic pollutants (POPS) PFOS appears in the environmental water and tap water in ng L(-1) level. The process of adsorption has been identified as an effective technique to eliminate PFOS in water. Three non-ion-exchange polymers (DowV493. DowL493 and AmbXAD4), two ion-exchange polymers (DowMarathonA and AmblRA400) and one granular activated carbon (GAC) (Filtersorb400) were tested with regard to their sorption kinetics and isotherms at low PFOS concentrations (100-1000 ng L-1 equilibrium concentrations) The sorption capacities at 1 jig L-1 equilibrium concentration decreased in the following order Ion-exchange polymers > non-ion-exchange polymers > GAC. but at further low equilibrium concentration (100 rig L-1) non-ion-exchange polymers showed higher adsorption capacity than other adsorbents In the case of sorption kinetics. GAC and ion-exchange polymers reached the equilibrium concentration within 4 h and AmbXAD4 within 10 h DowV493 and DowL493 took more than 80 h to reach equilibrium concentration AmbIRA400 was identified as the best filter material to eliminate PFOS at equilibrium concentration >1000 ng L. Considering both adsorption isotherms and adsorption kinetics. AmbXAD4 and DowMarathonA were recommended to eliminate PFOS at ng L(-1) equilibrium concentration. (C) 2010 Elsevier Ltd All rights reserved
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