Residue, Temporal Trend and Half-Life Time of Selected Organochlorine Pesticides (OCPs) in Surface Soils from Bacninh, Vietnam

Abstract

Selected organochlorine pesticides (p,p'-DDT, p,p'-DDE, p,p'-DDD, alpha,beta,gamma,delta-HCH) were analyzed in the surface soils of Bacninh, Viet Nam. Forty representative soil samples were collected from Bacninh town and three surrounding districts. SigmaDDT concentrations ranged from <0.02 to 160.86 ng g(-1) dry weight, whereas SigmaHCH concentrations ranged from <0.05 to 9.54 ng g(-1) dry weight. The half-life times of SigmaDDT and SigmaHCH are 6.7 and 4.9 years, respectively. The decreasing trends of SigmaDDT and SigmaHCH levels during the period from 1992 to 2006 are observed. There is no recent input of DDT and HCH in the study area.

Evaluation of hydrocarbons and organochlorine pesticides and their tolerant microorganisms from an agricultural soil to define its bioremediation feasibility

“…However, concentrations in the present study were higher than in rural soils of southern Chiapas, [42] where average values of 0.006-8.5 ng g ¡1 were observed ( Table 5). The concentrations obtained in the present work were lower than found in some other countries, such as case studies of agricultural and rural soils in Chile, Vietnam, China and Uganda; [43][44][45] but higher than in agricultural soils of Argentina and South Korea [46,47] (Table 5). …”

Residue of Select Organochlorine Pesticides (OCPs) in Sediment from Vietnam’s CauBay River and Their Impact on Agricultural Soil and Human Health

“…The obtained results clearly show the impact of OCP residues from the CauBay sediment on the quality of KieuKy agricultural soil. OCP residue in soil samples from KieuKy are comparable with those in soil of the Central Tibetan Plateau, China and lower than those in soil samples of Bacninh Province, Vietnam, [1,8].…”

Organochlorine pesticides in soil, water and sediment along the Jinjiang River mainstream to Quanzhou Bay, southeast China

“…The DDTs concentrations in the soil of JRW and QBC were in the same level with Mulan River Watershed (8.19 7 7.28 ng/g) and Qiulu River Watershed (5.26 7 2.93 ng/ g), nearby Xinghua Bay (Zhang et al, 2011b). When compared with other regions in the world, the DDTs concentrations in the soil of both JRW and QBC were much lower than Tasman, New Zealand (30-34,500 ng/g) (Gaw et al 2006), Bacninh, Vietnam (106.79 7 37.12 ng/g) (Toan et al 2009) and Germany (23.7-173 ng/g) (Manz et al, 2001). In terms of the distribution of DDTs in the JRW, o,p 0 -DDT and p,p 0 -DDE were dominant with nearly same mean value of 3.44 7 3.10 and 3.44 7 3.36 ng/g, respectively.…”

“…As a substitute, lindane ( 499% g-HCH) has been used in agriculture since 1990 (Li et al, 2001). Therefore, the a-HCH/g-HCH (a/g) ratio is in the range of 3-7 for technical HCH, whereas low a/g ratio depicts the usage of lindane (Li et al, 1998;Toan et al 2009). In the present study, a/g ratios (Fig.3) of the soil in JRW and QBC, DP and SPM of water, SS and SSS of Quanzhou Bay were all less than 3, which confirmed the use of lindane as the major source of HCHs contamination in the study region.…”