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Decomposition of Environmentally Persistent Perfluorinatied Acids by Use of Metal Complex Photocatalysis

利用金属络合物光催化分解环境持久性全氟酸

基本信息

批准号：
15310066
负责人：
HORI Hisao
金额：
$ 7.42万
依托单位：
NATIONAL INSTITUTE OF ADVANCED INDUSTRIAL SCIENCE AND TECHNOLOGY
依托单位国家：
日本
项目类别：
Grant-in-Aid for Scientific Research (B)
财政年份：
2003
资助国家：
日本
起止时间：
2003 至 2004
项目状态：
已结题

项目摘要

The decomposition of environmentally persistent perfluorocarboxylic acids (PFCAs, typically perfluorooctanoic acid ; PFOA) in water by UV-visible light irradiation, by H_2O_2 with UV-visible light irradiation, by a tungstic heteropolyacid (polyoxometalate) photocatalyst, and by persulfate was examined. In the case of long-chain PFCAs such as PFOA, direct photolysis proceeded slowly to produce CO_2, F^- ions and short-chain PFCAs. Compared to the direct photolysis, H_2O_2 was less effective in PFCA decomposition. On the other hand, the heteropolyacid photocatalyst led to efficient PFCA decomposition and the production of F^- ions and CO_2. The photocatalyst also suppressed the accumulation of short-chain PFCAs in the reaction solution. PFOA in the concentrations of 1.35 mM was completely decomposed by the catalyst within 24 h of irradiation from a 200-W xenon-mercury lamp, with no accompanying catalyst degradation. Gas chromatography/mass spectrometry (GC/MS) measurements showed no trace of environmentally undesirable species such as CF_4, which has a very high global-warming potential. When persulfate was used as a photochemical oxidant, the PFCA decomposition proceeded more rapidly. PFOA at a concentration of 1.35 mM was completely decomposed by a photochemical system using 50 mM S_2O_8^<2-> and 4 h of irradiation and the initial PFOA decomposition rate was 11 times higher than with photolysis alone.

研究了紫外-可见光、H_2O_2-紫外-可见光、钨杂多酸光催化剂和过硫酸盐对水中环境持久性全氟羧酸（PFCAs，典型的全氟辛酸; PFOA）的降解。对于长链的PFOA，直接光解缓慢地生成CO_2、F ~（2-）和短链的PFOA。与直接光解相比，H_2O_2对PFCA的降解效果较差。另一方面，杂多酸光催化剂导致PFCA的有效分解和F^-离子和CO_2的产生。光催化剂还抑制了反应溶液中短链全氟乙酸的积累。浓度为1.35 mM的PFOA在200 W氙-汞灯照射24小时内被催化剂完全分解，没有伴随的催化剂降解。气相色谱/质谱（GC/MS）测量显示，没有痕量的环境不良物种，如CF_4，这是一个非常高的全球变暖潜力。当过硫酸盐被用作光化学氧化剂时，PFCA的分解进行得更快。浓度为1.35 mM的PFOA在50 mM S_2O_8 ~（2-）和4 h光照条件下完全被光化学体系降解<2->，其初始降解速率是光化学体系的11倍。

项目成果

期刊论文数量（24）

专著数量（0）

科研奖励数量（0）

会议论文数量（0）

专利数量（0）

Efficient decomposition of environmentally persistent perfluorocarboxylic acids by use of persulfate as a photochemical oxidant

DOI：
10.1021/es0484754
发表时间：
2005-04-01
期刊：
ENVIRONMENTAL SCIENCE & TECHNOLOGY
影响因子：
11.4
作者：
Hori, H;Yamamoto, A;Kutsuna, S
通讯作者：
Kutsuna, S

堀久男: "Photochemical decomposition of pentafluoropropionic acid to fluoride ions with a water-soluble heteropolyacid photocatalyst"Applied Catalysis B : Environmental. 46. 333-340 (2003)

Hisao Hori：“用水溶性杂多酸光催化剂将五氟丙酸光化学分解为氟离子”应用催化 B：环境。 46. 333-340 (2003)

DOI：
发表时间：
期刊：
影响因子：
0
作者：
通讯作者：

Decomposition of environmentally persistent perfluorooctanoic acid in water by photochemical approaches

DOI：
10.1021/es049719n
发表时间：
2004-11-15
期刊：
ENVIRONMENTAL SCIENCE & TECHNOLOGY
影响因子：
11.4
作者：
Hori, H;Hayakawa, E;Arakawa, R
通讯作者：
Arakawa, R

High-performance liquid chromatography with conductimetric detection of perfluorocarboxylic acids and perfluorosulfonates

DOI：
10.1016/j.chemosphere.2004.05.028
发表时间：
2004-10-01
期刊：
CHEMOSPHERE
影响因子：
8.8
作者：
Hori, H;Hayakawa, E;Kobayashi, Y
通讯作者：
Kobayashi, Y

Efficient decomposition of environmentally persistent perfluorocarboxylic acids using persulfate as a photochemical oxidant

使用过硫酸盐作为光化学氧化剂有效分解环境持久性全氟羧酸

DOI：
发表时间：
2005
期刊：
Environmental Science & Technology 39
影响因子：
0
作者：
H.Hori;A.Yamamoto;E.Hayakawa;S.Taniyasu;N.Yamashita;S.Kustsuna;H.Kitagawa;R.Arakawa
通讯作者：
R.Arakawa