title: Fenton's treatment of actual agriculture runoff water containing herbicides.
abstract: This research was to study the efficiency of the Fenton's treatment process for the removal of three herbicides, namely 2,4-dichlorophenoxy acetic acid (2,4-D), ametryn and dicamba from the sugarcane field runoff water. The treatment process was designed with the Taguchi approach by varying the four factors such as H2O2/COD (1-3.5), H2O2/Fe2+(5-50), pH (2-5) and reaction time (30-240 min) as independent variables. Influence of these parameters on chemical oxygen demand (COD), ametryn, dicamba and 2,4-D removal efficiencies (dependent variables) were investigated by performing signal to noise ratio and other statistical analysis. The optimum conditions were found to be H2O2/COD: 2.125, H2O2/Fe2+: 27.5, pH: 3.5 and reaction time of 135 min for removal efficiencies of 100% for ametryn, 95.42% for dicamba, 88.2% for 2,4-D and with 75% of overall COD removal efficiencies. However, the percentage contribution of H2O2/COD ratio was observed to be significant among all four independent variables and were 44.16%, 67.57%, 51.85% and 50.66% for %COD, ametryn, dicamba and 2,4-D removal efficiencies, respectively. The maximum removal of herbicides was observed with the H2O2dosage of 5.44 mM and Fe2+dosage of 0.12 mM at pH 3.5.
authors.affiliation: Research scholar, Department of Civil Engineering, National Institute of Technology Karnataka, Surathkal, P.O. Srinivasnagar, Mangalore, DK 575025, India E-mail: sanjeevenv08@gmail.com.
authors.forename: Sanjeev
authors.initials: S
authors.lastname: Sangami
authors.affiliation: Research scholar, Department of Civil Engineering, National Institute of Technology Karnataka, Surathkal, P.O. Srinivasnagar, Mangalore, DK 575025, India E-mail: sanjeevenv08@gmail.com.
authors.forename: Basavaraju
authors.initials: B
authors.lastname: Manu
mesh_terms: D000383:Agriculture; D006540:Herbicides / Q000032:analysis*; D006861:Hydrogen Peroxide; D007501:Iron; D010084:Oxidation-Reduction; D014865:Waste Disposal, Fluid / Q000379:methods*; D014867:Water; D014874:Water Pollutants, Chemical / Q000032:analysis*
chemical_list: D006540:Herbicides; D014874:Water Pollutants, Chemical; D014867:Water; D006861:Hydrogen Peroxide; D007501:Iron