KINETICS OF ATRAZINE OXIDATION BY UV RADIATION AND OXALATE ASSISTED H<sub>2</sub>O<sub>2</sub>/UV PROCESSES

Choi, Hyun Jin; Choi, Jong Duck; Kim, Hyun Kab; Lee, Tae Jin

doi:2006.11.1.28

Environmental Engineering Research 2006;11(1): 28-32. DOI: https://doi.org/10.4491/eer.2006.11.1.028

KINETICS OF ATRAZINE OXIDATION BY UV RADIATION AND OXALATE ASSISTED H₂O₂/UV PROCESSES

Hyun Jin Choi, Jong Duck Choi, Hyun Kab Kim, and Tae Jin Lee^†

Department of Environmental Engineering, Seoul National University of Technology, 172, Gongneung-dong, Nowon-gu, Seoul, 139-743, KOREA

Corresponding Author: Tae Jin Lee ,Tel: +82-2-970-6614, Fax: +82-2-971-5776, Email: leetj@snut.ac.kr

Received: May 8, 2005; Accepted: January 8, 2006.

ABSTRACT

The degradation of atrazine was explored using UV alone, H₂O₂/UV, oxalate/UV and oxalate-assisted H1O2/UV. The addition of oxalate to the H₂O₂/UV (oxalate-assisted H₂O₂/UV) process was the most effective method for the degradation of atrazine. The overall kinetic rate constant was split into the direct oxidation due to photolysis and that by the radicals from hydrogen peroxide or oxalate. In semi-empirical terms, the initial concentration of hydrogen peroxide had a greater contribution than that of oxalate for atrazine oxidation.

Keywords: photolysis | oxalate | hydrogen peroxide | atrazine