title: Contamination by selected organochlorine pesticides (OCPs) in surface soils in Hanoi, Vietnam.
abstract: An evaluation of selected organochlorine pesticide residues [p,p'- dichlorodiphenyltrichloroethane (DDT), p,p'- dichlorodiphenyldichloroethylene (DDE), p,p'- dichlorodiphenyldichloroethane (DDD), alpha, beta, gamma and delta- hexachlorocyclohexane (HCH)] in the surface soils of Hanoi, Vietnam was carried out. Sixty representative soil samples were collected from the centre of Hanoi and five surrounding districts. In agricultural areas, SigmaDDT concentrations ranged from < 0.02 to 171.83 ng g(-1) (mean 89.86 ng g(-1)) dry weight, whereas SigmaHCH concentrations ranged from < 0.05 to 20.57 ng g(-1) (mean 8.03 ng g(-1)) dry weight. Investigation of the ratio of different isomers in the soil samples indicates that there has been no recent input of DDT and HCH in the study area.
authors.affiliation: Hanoi Water Resources University, 175 Tay Son Street, Hanoi, Vietnam. vuductoan2001@yahoo.com
authors.forename: Vu Duc
authors.initials: VD
authors.lastname: Toan
authors.forename: Vu Duc
authors.initials: VD
authors.lastname: Thao
authors.forename: Jürg
authors.initials: J
authors.lastname: Walder
authors.forename: Hans-Rudolf
authors.initials: HR
authors.lastname: Schmutz
authors.forename: Cao The
authors.initials: CT
authors.lastname: Ha
mesh_terms: D004784:Environmental Monitoring / Q000379:methods; D006843:Hydrocarbons, Chlorinated / Q000032:analysis*; D010573:Pesticide Residues / Q000032:analysis*; D012987:Soil / Q000032:analysis*; D012989:Soil Pollutants / Q000032:analysis*; D014744:Vietnam
chemical_list: D006843:Hydrocarbons, Chlorinated; D010573:Pesticide Residues; D012987:Soil; D012989:Soil Pollutants