Magnetic ion exchange resin for effective removal of perfluorooctanoate from water: study of a response surface methodology and adsorption performances
Magnetic ion exchange resin for effective removal of perfluorooctanoate from water: study of a response surface methodology and adsorption performances
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用于有效去除水中全氟辛酸盐的磁性离子交换树脂：响应面方法和吸附性能的研究
DOI：
10.1007/s11356-018-2797-1
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发表时间：
2018-08
影响因子：
5.8
通讯作者：
Zhang Xiaodong
中科院分区：
文献类型：
--
作者：
Yang Yiqiong;Ding Qiao;Yang Minhui;Wang Yin;Liu Ning;Zhang Xiaodong
研究了磁性离子交换树脂对水中全氟辛酸酯（PFOA）的吸附性能。通过间歇实验研究了PFOA的吸附性能。研究了吸附剂投加量、初始浓度、吸附时间、温度、搅拌强度、共存阴离子、初始溶液pH、天然有机物、离子强度、床体积等因素对PFOA吸附的影响。并利用响应面法对影响PFOA去除率的关键参数进行了研究。吸附平衡和动力学数据可以很好地符合Langmuir和伪二级模型。热力学参数的获得，它是观察到的吸附PFOA到MIEX树脂是一个吸热和自发的过程中所调查的温度。结果表明，MIEX树脂对PFOA的吸附既有物理吸附，也有化学吸附。此外，MIEX树脂可以有效地再生使用饱和氯化钠溶液。一系列的批实验和表征表明，MIEX树脂具有很强的吸附能力，去除率超过90%，允许在未来的水处理的实际应用。
This research exhibited the use of magnetic ion exchange (MIEX) resin as an effective adsorbent for the removal of perfluorooctanoate (PFOA) in aqueous solution. The adsorption performance of PFOA was investigated by a batch experiment. All kinds of factors affecting the adsorption of PFOA, including adsorbent dosage, initial concentration, adsorption time, temperature, stirring intensity, coexistent anions, initial solution pH, natural organic matter, ion strength, and bed volume were studied. Moreover, the response surface methodology was put into use to know the key parameters affecting PFOA removal efficiency. The sorption equilibrium and kinetic data could conform well to the Langmuir and pseudo-second-order model, respectively. Thermodynamic parameters were obtained, and it was observed that the adsorption of PFOA onto MIEX resin was an endothermic and spontaneous process at the temperatures under investigation. It was summarized that both chemical absorption and physical adsorption were involved in the PFOA sorption onto the MIEX resin. Moreover, the MIEX resin could be effectively regenerated using a saturated sodium chloride solution. A series of batch experiments and characterizations demonstrated that the MIEX resin possessed a strong adsorption ability with the removal efficiency exceeding 90%, allowing a possible practical application in future water treatment.
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影响因子：
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DOI：
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