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The Impact of Pesticides - Academy Publish

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Situation <strong>of</strong> study compounds in VietnamDDT and HCH are not included in the list <strong>of</strong> monitored items in Vietnam’smonitoring system due to certain constraints: finance, equipment and laboratorycapabilities. Most statistics about the contents <strong>of</strong> DDT and HCH in samples havebeen provided by projects from Institutes, universities and some governmentallaboratories, such as the Ministry for Agricultural and Rural development, theMinistry <strong>of</strong> Science and Technology. However, these statistics provide only limiteddata on the pollution situation <strong>of</strong> the studied substances in some provinces <strong>of</strong> VietNam.STUDY AREAS AND SAMPLINGStudy areasThis study selected Hanoi city and Bacninh province <strong>of</strong> Vietnam to research andcollect soil samples.HanoiHanoi city, located in the Red River Delta in the North Vietnam, is the centre <strong>of</strong>culture, politics, economy and trade <strong>of</strong> the whole country. Hanoi comprises sevenurban districts and five suburban districts, occupying an area <strong>of</strong> 927 km 2 . Hanoi hasmany factories in the urban districts and agricultural areas in the surroundingsuburbs. Some Persistent organochlorines pesticides (OCPs) such asdichlorodiphenyl trichloroethane (DDT), hexachlorocyclohexane (HCH) werewidely used here as pesticides. Although these compounds were banned for a longtime, their existences seem to be everywhere. <strong>The</strong> residues <strong>of</strong> DDTs and HCHs arealso detected in agricultural areas in Hanoi (Thao el al., 2005). Due to the importantrole <strong>of</strong> Hanoi, the safety <strong>of</strong> public health and environmental quality, an assessment<strong>of</strong> the content and distribution <strong>of</strong> these compounds in soil is therefore essential.BacninhBacninh province, located at the east <strong>of</strong> Hanoi city, is typical centre <strong>of</strong> industrial,agriculture and traditional village in Viet Nam. Bacninh comprises seven urbandistricts, occupying an area <strong>of</strong> 804 km 2 . <strong>The</strong> provincial capital, also known asBacninh, is a separate municipality.Collected data showed that DDTs and HCHs have been used in large quantities inthis region for a long time. Data about the residues <strong>of</strong> OCPs in the surface soils hereare rarely reported. Understanding the content and distribution <strong>of</strong> these compoundsis therefore essential to determine the utilization <strong>of</strong> soil for multi-purposes. In thepresent study, we attempted to elucidate the recent contamination levels andtemporal trend <strong>of</strong> OCPs in surface soil from Hanoi and Bacninh.<strong>Academy</strong><strong>Publish</strong>.org - <strong>The</strong> <strong>Impact</strong> <strong>of</strong> <strong>Pesticides</strong>297

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