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A novel use of nano-ceramic material to remove toxic organic pollutants in water by simultaneous separation and electrochemical oxidation

纳米陶瓷材料同时分离和电化学氧化去除水中有毒有机污染物的新用途

基本信息

批准号：
17201019
负责人：
OZAKI Hiroaki
金额：
$ 25.38万
依托单位：
Osaka Sangyo University
依托单位国家：
日本
项目类别：
Grant-in-Aid for Scientific Research (A)
财政年份：
2005
资助国家：
日本
起止时间：
2005 至 2007
项目状态：
已结题

项目摘要

Pharmaceuticals and personal care products (PPCPs), and perfluorochemicals (PFCs) as persistent organic pollutants (POPs) in water have raised substantial concern among the public and regulatory agencies recently. Therefore, effective treatment methods for the POPs contaminated water are needed to properly address the concern. Electrochemical oxidation of common PPCPs and PFCs, and simultaneous separation combined with electrochemical oxidation of the PPCPs in water using newly developed nano-ceramic porous electrodes respectively in laboratory batch and continuous experiments were investigated. The water permeable ceramic electrodes with good electrical conductivity were prepared using combustion synthesis method.The sixteen PPCPs were classified into three groups based on their degradations by electrochemical method: (a) easily degradable (Isopropylantipyrine, Diclofenac, Naproxen, Indomethacin, Triclosan and Gemfibrozil), (b) degradable in relatively longer time (Phenacetine, Clarit … More hromycin, Methoxsalen and Carbamazepine) and (c) difficult to degrade (Ibuprofen, Ketoprofen, Phenobarbital, Clofibric acid, Phenytoin and Fenoprofen). Two common PFCs, namely PFOA (Perfluorooctanoic acid) and PFOS (Perfluorooctane sulfonate), which are very resistant to biological and ordinary physicochemical methods, were degraded up to 84% and 99% respectively by the method.Moreover, a novel unit for simultaneous separation and electrochemical oxidation was designed using the nano-ceramic electrodes, and the unit was tested in continuous laboratory experiments for PPCPs removal. The PPCPs were continuously rejected by the system with almost the same efficiencies as observed in batch tests for electrochemical oxidation despite very short retention time for the combined process. About 20% of the PPCPs in feed water were adsorbed onto the porous ceramic medium indicating significance of adsorption on the rejections. The results indicated that the combined treatment method using the new ceramic material is very promising. Less

近年来，医药和个人护理产品（PPCPs）以及全氟化学品（PFCs）作为水体中的持久性有机污染物（POPs）引起了公众和监管机构的极大关注。因此，需要针对持久性有机污染物污染水的有效处理方法来妥善解决这一问题。采用新型纳米陶瓷多孔电极对水中常见的PPCPs和PFCs进行了电化学氧化和同时分离-电化学氧化的实验室间歇和连续实验研究。采用燃烧合成法制备了具有良好导电性的透水性陶瓷电极，并根据电化学降解性能将16种PPCP分为3类：（a）易降解（异丙基安替比林、双氯芬酸、萘普生、吲哚美辛、三氯生和吉非罗齐）;（B）降解时间较长（非那西丁、克拉丽特 ...更多信息红霉素、甲氧沙林和卡马西平）和（c）难以降解（布洛芬、酮洛芬、苯巴比妥、氯贝酸、苯妥英和非诺洛芬）。该方法对生物法和常规物理化学法难以降解的PFOA（全氟辛酸）和PFOS（全氟辛烷磺酸）的降解率分别达到84%和99%，并设计了一种基于纳米陶瓷电极的同步分离-电化学氧化装置，对PPCPs进行了连续实验研究. PPCPs被系统连续拒绝，尽管组合工艺的保留时间非常短，但与电化学氧化的分批测试中观察到的效率几乎相同。给水中约20%的PPCPs被吸附到多孔陶瓷介质上，表明吸附在废弃物上的意义。结果表明，采用新型陶瓷材料的综合处理方法是很有前途的。少