Journal
ENVIRONMENTAL POLLUTION
Volume 111, Issue 1, Pages 21-27Publisher
ELSEVIER SCI LTD
DOI: 10.1016/S0269-7491(00)00033-6
Keywords
atrazine; iron; dechlorination; herbicide; degradation
Categories
Ask authors/readers for more resources
The dechlorination of atrazine (2-chloro-4-ethylaulino-6-isopropylamino-1,3,5-triazine) via reaction with metallic iron under low-oxygen conditions was studied using reaction mixture pH values of 2.0. 3.0, and 3.8. The pH control was achieved through addition of sulfuric acid throughout the duration of the reaction. The lower the pH of the reaction mixture, the faster the degradation of atrazine. The surface area of the sulfuric acid-treated iron particles was 0.31 (+/- 0.01) m(2) g(-1) and the surface area normalized initial pseudo-first order rate constants (k(SA), where rate = k(SA)x(surface area/l)x[Atrazine]) at pH values of 2.0, 3.0, and 3.8 were equal to, respectively, 3.0 (+/- 0.4)x 10(-3) min(-1) m(-2) 1, 5 (+/- 3)x 10(-4) min(-1) m(-2) 1, and 1 (+/- 1)x 10(-4) min(-1) m(-2) 1. The observed products of the degradation reaction were dechlorinated atrazine (2-ethylamino-4-isopropylamino-1,3,5-triazine) and possibly hydroxyatrazine (2-ethylamino-4-isopropylamino-6-hydroxy-s-triazine). Triazine ring protonation may account, at least in part, for the observed effect of pH on atrazine dechlorination via metallic iron. (C) 2000 Elsevier Science Ltd. All rights reserved.
Authors
I am an author on this paper
Click your name to claim this paper and add it to your profile.
Reviews
Recommended
No Data Available