Biodegradation of ozonated atrazine as a wastewater disposal system

Journal Article · · Journal of Agricultural and Food Chemistry; (USA)

DOI:https://doi.org/10.1021/jf00084a044· OSTI ID:6969372

Kearney, P C; Muldoon, M T; Somich, C J; Ruth, J M; Voaden, D J ^[1]

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1. Pesticide Degradation Laboratory, Beltsville, MD (USA)

Destruction of atrazine (2-chloro-4-(ethylamino)-6-(isopropylamino)-s-triazine) by ozonation and subsequent soil biodegradation was examined as a low-volume two-step dilute wastewater disposal system. The rate of oxidation was first order for 100 mg/L ozonized solutions of formulated atrazine (t{sub {1/2}} = 16 min). Atrazine oxidation was more rapid at pH 10 than pH 8 or pH 6.5 unbuffered solution. No loss of {sup 14}C occurred from (U-ring-{sup 14}C)atrazine in 1-h studies. Degradation of atrazine proceeded by addition of oxygen to the alkylamino group, dealkylation, deamination, and dehalogenation. Product distribution was substantially shifted toward the more polar s-triazines as the pH was increased. Atrazine metabolism in soil increased as the pH values of the solutions were adjusted to more basic conditions.

• OSTI ID: 6969372
• Journal Information: Journal of Agricultural and Food Chemistry; (USA), Journal Name: Journal of Agricultural and Food Chemistry; (USA) Vol. 36; ISSN JAFCA; ISSN 0021-8561
• Country of Publication: United States
• Language: English

Related Subjects

54 ENVIRONMENTAL SCIENCES
540311* -- Environment
Aquatic-- Basic Studies-- Radiometric Techniques-- (1990-)
BIODEGRADATION
CARBON 14 COMPOUNDS
CHEMICAL REACTIONS
CLEANING
DECOMPOSITION
DECONTAMINATION
HERBICIDES
HYDROGEN COMPOUNDS
ISOTOPE APPLICATIONS
LABELLED COMPOUNDS
LIQUID WASTES
METABOLISM
OXYGEN COMPOUNDS
PESTICIDES
TRACER TECHNIQUES
WASTE WATER
WASTES
WATER