Abiotic Degradation Degradation of the Herbicide Oxadiazon in Water

  • Rahman Md. Mokhlesur (Department of Agricultural Chemistry, Kyungpook National University) ;
  • Park, Jong-Woo (Department of Agricultural Chemistry, Kyungpook National University) ;
  • Park, Man (Department of Agricultural Chemistry, Kyungpook National University) ;
  • Rhee In-Koo (Department of Agricultural Chemistry, Kyungpook National University) ;
  • Kim, Jang-Eok (Department of Agricultural Chemistry, Kyungpook National University)
  • Published : 2006.12.31


The performance of abiotic degradation of oxadiazon was investigated by applying zerovalent iron(ZVI), potassium permanganate($KMnO_4$) and titanium dioxide($TiO_2$) in the contaminated water. Experimental conditions allowed the disappearance of oxadiazon in the abiotic system. The degradation of this herbicide was monitored in buffer solutions having pH 3, 5 and 7 in the presence of iron powder in which the maximum degradation rate was achieved at acidic condition(pH 3) by 2% of ZVI treatment. The oxidative degradation of oxadiazon was observed in aqueous solution by $KMnO_4$ at pH 3, 7 and 10 in which the highest disappearance rate was found at neutral pH when treated with 2% of $KMnO_4$. The catalytic degradation of oxadiazon in $TiO_2$ suspension was obtained under dark and UV irradiation conditions. UV irradiation enhanced the degradation of oxadiazon in aquatic system in the presence of $TiO_2$. Conclusively, the remediation strategy using these abiotic reagents could be applied to remove oxadiazon from the contaminated water.


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