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

药品和个人护理产品（PPCP）和全氟化合物（PFC）作为水中的持久性有机污染物（POPs）最近引起了公众和监管机构的极大关注，因此需要有效的处理方法来妥善解决POPs污染的水体。常见的 PPCP 和 PFC 的电化学氧化，以及使用新开发的纳米陶瓷多孔电极同时分离水中 PPCP 的电化学氧化。采用燃烧合成法制备了具有良好导电性的透水陶瓷电极。根据电化学方法的降解情况将16种PPCP分为三类：（a）易降解（异丙基安替比林、双氯芬酸）。，萘普生，吲哚美辛，三氯生和吉非贝齐），（b）在相对较长的时间内可降解（非那西丁，克拉丽特......更多两种常见的PFC，即PFOA（全氟辛酸）和PFOS（全氟辛烷磺酸），对生物和普通物理化学方法具有很强的抵抗力，可降解至该方法的去除率分别为84%和99%。此外，利用纳米陶瓷电极设计了一种同时分离和电化学氧化的新型装置，并在连续的实验室实验中对该装置进行了PPCPs去除实验。PPCPs连续被去除。尽管组合工艺的保留时间很短，但系统的效率与电化学氧化批量测试中观察到的效率几乎相同，给水中约 20% 的 PPCP 被吸附。结果表明，使用新型陶瓷材料的组合处理方法非常有前景。