title: Assessment of pesticide residues in two arable soils from the semi-arid and subtropical regions of China.
abstract: The residues of 31 chlorinated hydrocarbons (CHCs), 25 chlorophenols (CPs), 30 organophosphorus (OP) and pyrethroid (PRT) in two arable soils from the semi-arid and subtropical regions of China were assessed. Data obtained indicate that the main compounds of CHC pesticide residues in the semi-arid soil were 4,4'-DDE (25.3 ng/g) and beta-HCH (14.1 ng/g), which totally accounted to about 90% of total CHC residues detected. The total content of CHC residues detected in the subtropical soil was only 3.1 ng/g, of which approximately 50% was beta-HCH. However, the total content of CP residues in both of the soils was about 11 ng/g. In the semi-arid soil, only parathion-methyl amongst the 30 compounds of OP and PRT residues was detected (32.5 ng/g), whilst malathion and parathion-methyl (8.7 and 17.7 ng/g, respectively) detected in the subtropical soil. Based on these results, it was suggested the environmental risk of pesticide residues ranked in an order as CHCs (mainly as 4,4'-DDE, beta-HCH) > OP (parathion-methyl) > CPs for the semi-arid soil, and as OPs (parathion-methyl and malathion) > CPs > CHCs (beta-HCH) for the subtropical soil.
authors.affiliation: The Key Laboratory of Agro-ecology, Institute of Subtropical Agriculture, CAS, Mapoling, District of Furong, Changsha, Hunan Province, P.R. China. lgwang0827@yahoo.com.cn
authors.forename: Ligang
authors.initials: L
authors.lastname: Wang
authors.forename: Zhenhua
authors.initials: Z
authors.lastname: Zhao
authors.forename: Xin
authors.initials: X
authors.lastname: Jiang
authors.forename: Jinshui
authors.initials: J
authors.lastname: Wu
authors.forename: Dieter
authors.initials: D
authors.lastname: Martens
mesh_terms: D002681:China; D002733:Chlorophenols / Q000032:analysis*; D003889:Desert Climate; D004784:Environmental Monitoring; D006843:Hydrocarbons, Chlorinated / Q000032:analysis*; D009943:Organophosphorus Compounds / Q000032:analysis*; D010573:Pesticide Residues / Q000032:analysis*; D010575:Pesticides / Q000032:analysis; D011722:Pyrethrins / Q000032:analysis*; D012989:Soil Pollutants / Q000032:analysis; D014329:Tropical Climate
chemical_list: D002733:Chlorophenols; D006843:Hydrocarbons, Chlorinated; D009943:Organophosphorus Compounds; D010573:Pesticide Residues; D010575:Pesticides; D011722:Pyrethrins; D012989:Soil Pollutants