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Photolytic treatment of atrazine-contaminated water: products, kinetics, and reactor design.
Water Environ Res. 2007 Aug; 79(8):851-7.WE

Abstract

This study investigates the products, kinetics, and reactor design of atrazine photolysis under 254-nm ultraviolet-C (UVC) irradiation. With an initial atrazine concentration of 60 microg/L (60 ppbm), only two products remain in detectable levels. Up to 77% of decomposed atrazine becomes hydroxyatrazine, the major product. Both atrazine and hydroxyatrazine photodecompose following the first-order rate equation, but the hydroxyatrazine photodecomposition rate is significantly slower than that of atrazine. For atrazine photodecomposition, the rate constant is proportional to the square of UVC output, but inversely proportional to the reactor volume. For a photochemical reactor design, a series of equations are proposed to calculate the needed UVC output power, water treatment capacity, and atrazine outlet concentration.

Authors+Show Affiliations

Department of Chemical Engineering, Lamar University, Beaumont, Texas 77710, USA.No affiliation info availableNo affiliation info availableNo affiliation info availableNo affiliation info available

Pub Type(s)

Journal Article
Research Support, U.S. Gov't, Non-P.H.S.

Language

eng

PubMed ID

17824531

Citation

Ye, Xuejun, et al. "Photolytic Treatment of Atrazine-contaminated Water: Products, Kinetics, and Reactor Design." Water Environment Research : a Research Publication of the Water Environment Federation, vol. 79, no. 8, 2007, pp. 851-7.
Ye X, Chen D, Li K, et al. Photolytic treatment of atrazine-contaminated water: products, kinetics, and reactor design. Water Environ Res. 2007;79(8):851-7.
Ye, X., Chen, D., Li, K., Wang, B., & Hopper, J. (2007). Photolytic treatment of atrazine-contaminated water: products, kinetics, and reactor design. Water Environment Research : a Research Publication of the Water Environment Federation, 79(8), 851-7.
Ye X, et al. Photolytic Treatment of Atrazine-contaminated Water: Products, Kinetics, and Reactor Design. Water Environ Res. 2007;79(8):851-7. PubMed PMID: 17824531.
* Article titles in AMA citation format should be in sentence-case
TY - JOUR T1 - Photolytic treatment of atrazine-contaminated water: products, kinetics, and reactor design. AU - Ye,Xuejun, AU - Chen,Daniel, AU - Li,Kuyen, AU - Wang,Bin, AU - Hopper,Jack, PY - 2007/9/11/pubmed PY - 2007/10/17/medline PY - 2007/9/11/entrez SP - 851 EP - 7 JF - Water environment research : a research publication of the Water Environment Federation JO - Water Environ Res VL - 79 IS - 8 N2 - This study investigates the products, kinetics, and reactor design of atrazine photolysis under 254-nm ultraviolet-C (UVC) irradiation. With an initial atrazine concentration of 60 microg/L (60 ppbm), only two products remain in detectable levels. Up to 77% of decomposed atrazine becomes hydroxyatrazine, the major product. Both atrazine and hydroxyatrazine photodecompose following the first-order rate equation, but the hydroxyatrazine photodecomposition rate is significantly slower than that of atrazine. For atrazine photodecomposition, the rate constant is proportional to the square of UVC output, but inversely proportional to the reactor volume. For a photochemical reactor design, a series of equations are proposed to calculate the needed UVC output power, water treatment capacity, and atrazine outlet concentration. SN - 1061-4303 UR - https://www.unboundmedicine.com/medline/citation/17824531/Photolytic_treatment_of_atrazine_contaminated_water:_products_kinetics_and_reactor_design_ L2 - https://onlinelibrary.wiley.com/resolve/openurl?genre=article&sid=nlm:pubmed&issn=1061-4303&date=2007&volume=79&issue=8&spage=851 DB - PRIME DP - Unbound Medicine ER -