title: Photocatalytic degradation of agricultural N-heterocyclic organic pollutants using immobilized nanoparticles of titania.
abstract: Degradation and mineralization of two agricultural organic pollutants (Diazinon and Imidacloprid as N-heterocyclic aromatics) in aqueous solution by nanophotocatalysis using immobilized titania nanoparticles were investigated. Insecticides, Diazinon and Imidacloprid, are persistent pollutants in agricultural soil and watercourses. A simple and effective method was developed to immobilization of titania nanoparticles. UV-vis, ion chromatography (IC) and chemical oxygen demand (COD) analyses were employed. The effects of operational parameters such as H(2)O(2) and inorganic anions (NO(3)(-), Cl(-) and SO(4)(2-)) were investigated. The mineralization of Diazinon and Imidacloprid was evaluated by monitoring of the formed inorganic anions. The selected pollutants are effectively degraded following first order kinetics model. Results show that the nanophotocatalysis using immobilized titania nanoparticle is an effective method for treatment Diazinon and Imidacloprid from contaminated water.
authors.affiliation: Colorant Manufacturing and Environmental Science Department, Institute for Colorants, Paint and Coating, Tehran, Iran. nm_mohmoodi@yahoo.com
authors.forename: Niyaz Mohammad
authors.initials: NM
authors.lastname: Mahmoodi
authors.forename: Mokhtar
authors.initials: M
authors.lastname: Arami
authors.forename: Nargess Yousefi
authors.initials: NY
authors.lastname: Limaee
authors.forename: Kamaladin
authors.initials: K
authors.lastname: Gharanjig
mesh_terms: D016573:Agrochemicals; D001389:Azirines / Q000737:chemistry*; D002384:Catalysis; D004095:Dihydropyridines / Q000737:chemistry*; D007093:Imidazoles / Q000737:chemistry*; D053768:Metal Nanoparticles / Q000737:chemistry*; D000073943:Neonicotinoids; D009574:Nitro Compounds / Q000737:chemistry*; D010777:Photochemistry; D014025:Titanium / Q000737:chemistry*; D014466:Ultraviolet Rays; D014874:Water Pollutants, Chemical / Q000737:chemistry*; D018508:Water Purification / Q000295:instrumentation / Q000379:methods
chemical_list: D016573:Agrochemicals; D001389:Azirines; D004095:Dihydropyridines; D007093:Imidazoles; D000073943:Neonicotinoids; D009574:Nitro Compounds; D014874:Water Pollutants, Chemical; C069267:diazipine; C082359:imidacloprid; D014025:Titanium