Nano Archive

FeCl3/NaNO2: An efficient photocatalyst for the degradation of aquatic steroid estrogens under natural light irradiation

Wang, Lianzhi and Zhang, Feifang and Liu, Renhua and Zhang, Tony Y. and Xue, Xingya and Xu, Qing and Liang, Xinmiao (2007) FeCl3/NaNO2: An efficient photocatalyst for the degradation of aquatic steroid estrogens under natural light irradiation. ENVIRONMENTAL SCIENCE & TECHNOLOGY, 41 (10). pp. 3747-3751.

Full text is not hosted in this archive but may be available via the Official URL, or by requesting a copy from the corresponding author.

Official URL: http://pubs.acs.org/doi/abs/10.1021/es0625778?prev...

Abstract

Assistance and acceleration of the environment's self-remediation of pollutants represent an important and long-standing goal for environmental chemistry communities. Here, a degradation route using a combination of a nitrite and a ferric salt as the photocatalyst is presented for catalytically removing 17 beta-estradiol (E2), estriol (E3), and 17 alpha-ethynylestradiol (EE2) in water under mimicked natural environmental conditions, i.e., in the phytotron. After a 1 day reaction, 86.6% of the estrogen E2 was degraded. Extending the incubation time to 30 days, more than 99.9% E2 was removed and a very small quantity of malonic acid observed as the residual organic compound, and estrogenic activity was determined. The results showed that the estrogenic activities of the intermediate products are negligible and that there is no secondary risk associated with increased the estrogenic activity. The degradation system demonstrated that FeCl3/NaNO2 is an efficient photocatalyst which is active on natural light irradiation. This work highlights a promising development for in situ treatment of pollutants in natural-environment conditions.

Item Type:Article
Uncontrolled Keywords:Wet oxidation; Ferric chloride; Sodium nitrite; Azo dye; Acid Orange 7
Subjects:Risk > Environment, health and safety aspects of nanotechnology
Physical Science > Photonics
ID Code:789
Deposited By:Farnush Anwar
Deposited On:05 Dec 2008 13:19
Last Modified:05 Dec 2008 13:19

Repository Staff Only: item control page