A comparative study of adsorption of perfluorooctane sulfonate (PFOS) onto granular activated carbon, ion-exchange polymers and non-ion-exchange polymers.
A comparative study of adsorption of perfluorooctane sulfonate (PFOS) onto granular activated carbon, ion-exchange polymers and non-ion-exchange polymers.
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DOI：
10.1016/j.chemosphere.2010.04.053
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发表时间：
2010-07
期刊：
影响因子：
8.8
通讯作者：
S. Senevirathna;Shuhei Tanaka;Shigeo Fujii;Chinagarn Kunacheva;Hidenori Harada;B. R. Shivakoti;
中科院分区：
文献类型：
--
作者：
S. Senevirathna;Shuhei Tanaka;Shigeo Fujii;Chinagarn Kunacheva;Hidenori Harada;B. R. Shivakoti;
全氟辛烷磺酸(PFOS)是最新的持久性有机污染物(POPs)。全氟辛烷磺酸在环境水和自来水中的含量均为NGL−1级。吸附过程已被认为是去除水中全氟辛烷磺酸的有效技术。研究了三种非离子交换聚合物(DowV493、DowL493和AmbXAD4)、两种离子交换聚合物(DowMarathonA和AmbIRA400)和一种颗粒活性碳(Filtersorb400)在低全氟辛烷磺酸浓度(100-1000ngL−-1平衡浓度)下的吸附动力学和吸附等温线。在1μgl−1平衡浓度下，吸附容量的大小顺序为：离子交换聚合物>>非离子交换聚合物>>GAc，但在更低的平衡浓度(100 ngL−1)下，非离子交换聚合物表现出较高的吸附容量。在吸附动力学方面，GAC和离子交换聚合物在4h内达到平衡浓度，AmbXAD4在10h内达到平衡浓度。DowV493和DowL493需要80h以上才能达到平衡浓度。从吸附等温线和吸附动力学两方面考虑，AmbIRA400是去除−1平衡浓度下全氟辛烷磺酸的最佳过滤材料。综合考虑吸附等温线和吸附动力学，推荐使用AmbXAD4和DowMarathonA来去除−1平衡浓度下的全氟辛烷磺酸。
Perfluorooctane sulfonate (PFOS) is the latest chemical categorized as persistent organic pollutants (POPs). PFOS appears in the environmental water and tap water in ngL−1level. 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 AmbIRA400) and one granular activated carbon (GAC) (Filtersorb400) were tested with regard to their sorption kinetics and isotherms at low PFOS concentrations (100–1000ngL−1equilibrium concentrations). The sorption capacities at 1μgL−1equilibrium concentration decreased in the following order: Ion-exchange polymers>non-ion-exchange polymers>GAC, but at further low equilibrium concentration (100ngL−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 4h and AmbXAD4 within 10h. DowV493 and DowL493 took more than 80h to reach equilibrium concentration. AmbIRA400 was identified as the best filter material to eliminate PFOS at equilibrium concentration>1000ngL−1. Considering both adsorption isotherms and adsorption kinetics, AmbXAD4 and DowMarathonA were recommended to eliminate PFOS at ngL−1equilibrium concentration.