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全氟辛烷磺酸类物质(PFOS)是一种新型持久性有机污染物,对人类健康存在很大威胁,目前世界范围内的水体中均检测到不同浓度的PFOS。研究如何安全有效去除这类新型污染物十分必要。利用HYDRA-core 10纳滤膜进行PFOS去除研究,在不同操作压力下研究pH、电解质以及与腐殖酸共存对PFOS截留效果的影响。结果表明,随着pH值的增加,截留率上升;二价盐对PFOS截留率的影响要高于一价盐,并且随着二价盐离子强度的增加,截留率上升;腐殖酸共存时截留效率有显著增加,尤其在1 mmol/L钙离子存在条件下,PFOS的截留率可达到95.8%,但会引起膜通量下降及膜污染的发生。
Perfluorooctane sulfonate (PFOS) is a new type of persistent organic pollutant that poses a great threat to human health. At present, different concentrations of PFOS are detected in water bodies worldwide. It is necessary to study how to safely and effectively remove such new pollutants. The use of HYDRA-core 10 nanofiltration membrane PFOS removal studies, under different operating pressures of pH, electrolyte and humic acid coexistence PFOS retention effect. The results showed that the rejection increased with the increase of pH value. The effect of divalent salt on PFOS rejection was higher than that of monovalent salt, and the rejection increased with the increase of divalent salt ion concentration. When humic acid coexisted Especially in the presence of 1 mmol / L calcium ions, the PFOS rejection rate can reach 95.8%, but it will cause the decrease of membrane flux and the occurrence of membrane fouling.