title: Minimization of methabenzthiazuron residues in leaching water using amended soils and photocatalytic treatment with TiO2 and ZnO.
abstract: In the present work, potential groundwater pollution by methabenzthiazuron (MTBU) and the effect of three different amendments (composted sheep manure, composted pine bark and spent coffee grounds) on its mobility were investigated under laboratory conditions. The efficiency of ZnO and TiO2 suspensions in the photocatalytic degradation of MTBU in leaching water was also investigated. The relative and cumulative breakthrough curves were obtained from disturbed soil columns. The presence and/or addition of organic matter drastically reduced the movement of the herbicide. On other hand, photocatalytic experiments showed that the addition of ZnO and TiO2 strongly enhances the degradation rate of this herbicide compared with the results of photolytic experiments under artificial light. ZnO appeared to be more effective in MTBU oxidation than TiO2. The results obtained point to the interest of using organic wastes and heterogeneous photocatalysis for reducing the pollution of groundwater by pesticide drainage.
authors: Department of Food Quality, Murcia Institute of Agri-Food Research and Development, C/Mayor s/n. La Alberca, Murcia 30150, Spain. Electronic address: jose.fenoll@carm.es.
authors: José
authors: J
authors: Fenoll
authors: Department of Food Quality, Murcia Institute of Agri-Food Research and Development, C/Mayor s/n. La Alberca, Murcia 30150, Spain.
authors: Pilar
authors: P
authors: Flores
authors: Department of Food Quality, Murcia Institute of Agri-Food Research and Development, C/Mayor s/n. La Alberca, Murcia 30150, Spain.
authors: Pilar
authors: P
authors: Hellín
authors: Department of Agricultural Chemistry, Geology and Pedology, School of Chemistry, University of Murcia, Campus Universitario de Espinardo, Murcia 30100, Spain.
authors: Joaquín
authors: J
authors: Hernández
authors: Department of Agricultural Chemistry, Geology and Pedology, School of Chemistry, University of Murcia, Campus Universitario de Espinardo, Murcia 30100, Spain.
authors: Simon
authors: S
authors: Navarro
mesh_terms: D000818:Animals; D052160:Benzothiazoles / Q000737:chemistry*; D040503:Coffea; D008372:Manure; D008782:Methylurea Compounds / Q000737:chemistry*; D010782:Photolysis; D028223:Pinus; D024301:Plant Bark; D012756:Sheep; D012987:Soil / Q000737:chemistry*; D014025:Titanium / Q000737:chemistry; D014877:Water Pollution, Chemical / Q000517:prevention & control*; D015034:Zinc Oxide / Q000737:chemistry
chemical_list: D052160:Benzothiazoles; D008372:Manure; D008782:Methylurea Compounds; D012987:Soil; C009495:titanium dioxide; C011912:methabenzthiazuron; D014025:Titanium; D015034:Zinc Oxide
keywords: groundwater pollution; organic amendment; pesticide movement; photocatalytic oxidation; semiconductor oxides