title: Accumulation pattern of pesticides in tropical fresh waters.
abstract: High-performance liquid chromatography has been used to study the persistence of commonly used organophosphorus and carbamate pesticides-carbaryl, carbendazim, carbofuran, dimethoate, malathion and methyl parathion in river water in the presence of bottom sediment in laboratory aquaria. The fate of pesticides in water and sediment in pre- and post-monsoon water from three sources has been compared. It has been established that rapid degradation occurs once the pesticide leaches into sediment from water. Degradation was at a much faster rate in post-monsoon water and sediment. It was found that pH and organic matter content affect rate of decay.
authors.affiliation: Department of Chemistry, University of Roorkee, India.
authors.forename: R
authors.initials: R
authors.lastname: Bhushan
authors.forename: S
authors.initials: S
authors.lastname: Thapar
authors.forename: R P
authors.initials: RP
authors.lastname: Mathur
mesh_terms: D000969:Antinematodal Agents / Q000032:analysis; D001562:Benzimidazoles / Q000032:analysis; D002219:Carbamates; D012721:Carbaryl / Q000032:analysis; D002235:Carbofuran / Q000032:analysis; D002851:Chromatography, High Pressure Liquid / Q000379:methods*; D004117:Dimethoate / Q000032:analysis; D005618:Fresh Water / Q000737:chemistry*; D007194:India; D007306:Insecticides / Q000032:analysis*; D008294:Malathion / Q000032:analysis; D008743:Methyl Parathion / Q000032:analysis; D010573:Pesticide Residues / Q000032:analysis*; D014329:Tropical Climate; D014873:Water Pollutants / Q000032:analysis*
chemical_list: D000969:Antinematodal Agents; D001562:Benzimidazoles; D002219:Carbamates; D007306:Insecticides; D010573:Pesticide Residues; D014873:Water Pollutants; D008743:Methyl Parathion; C006698:carbendazim; D012721:Carbaryl; D002235:Carbofuran; D008294:Malathion; D004117:Dimethoate