A platform for research: civil engineering, architecture and urbanism
A platform for research: civil engineering, architecture and urbanism
Oxidation of simazine: Biological oxidation of simazine and its chemical oxidation byproducts
Batch biodegradation studies were conducted to assess the biodegradability of single s‐triazines. s‐Triazines tested included simazine, a widely used herbicide, and its products resulting from oxidation with ozone, ultraviolet (UV) light, and combined ozone and UV light oxidation. Degradation rates for each s‐triazine were calculated as μM N/hr. Rates ranged from 0 to 10.3 μM N/hr. s‐Triazine degradation rates were a function of the ring substituents and followed the order of hydroxy ≫ amino ≫ chlorine ≥ ethylamino. Chemical oxidation methods capable of oxidizing the more persistent simazine substituent groups (chlorine and ethylamine) to more easily biodegraded substituents (amine and hydroxy) proved attractive in enhancing the s‐triazine mineralization of simazine. When simazine was pretreated with combined ozone and UV, the s‐triazine biodegradation rate was increased by an order of magnitude. s‐Triazine biodegradation rates also were enhanced with ozone and UV pretreatment but not to the same extent.
Oxidation of simazine: Biological oxidation of simazine and its chemical oxidation byproducts
Batch biodegradation studies were conducted to assess the biodegradability of single s‐triazines. s‐Triazines tested included simazine, a widely used herbicide, and its products resulting from oxidation with ozone, ultraviolet (UV) light, and combined ozone and UV light oxidation. Degradation rates for each s‐triazine were calculated as μM N/hr. Rates ranged from 0 to 10.3 μM N/hr. s‐Triazine degradation rates were a function of the ring substituents and followed the order of hydroxy ≫ amino ≫ chlorine ≥ ethylamino. Chemical oxidation methods capable of oxidizing the more persistent simazine substituent groups (chlorine and ethylamine) to more easily biodegraded substituents (amine and hydroxy) proved attractive in enhancing the s‐triazine mineralization of simazine. When simazine was pretreated with combined ozone and UV, the s‐triazine biodegradation rate was increased by an order of magnitude. s‐Triazine biodegradation rates also were enhanced with ozone and UV pretreatment but not to the same extent.
Oxidation of simazine: Biological oxidation of simazine and its chemical oxidation byproducts
Lai, Ming‐Shen (author) / Weber, A. Scott (author) / Jensen, James N. (author)
Water Environment Research ; 67 ; 347-354
1995-05-01
8 pages
Article (Journal)
Electronic Resource
English
SIMAZINE , TRIAZINE , OXIDATION , OZONE , ULTRAVIOLET