TAILIEUCHUNG - Volatile Organic Compound (VOC) measurements in the Pearl River Delta (PRD) region, China

Copper fungicides are environmentally unfriendly. They are very toxic to fish and aquatic invertebrates, such as crab, shrimp and oysters. There are cases where most animal life in soil, including large earthworms, have been eliminated by the extensive use of copper-containing fungicides in orchards. It is strongly bioaccumulated and is very persistent. Once a soil is contaminated with copper, there is no practical way to remove it. The organic insecticide rotenone has been found to be toxic to pigs, rats and dogs and is is very toxic to fish. It causes skin and eye irritations. Inhalation of the dust causes respiratory problems and convulsions in. | Atmos. Chem. Phys. 8 1531-1545 2008 8 1531 2008 Author s 2008. This work is distributed under the Creative Commons Attribution License. Atmospheric Chemistry and Physics Volatile Organic Compound VOC measurements in the Pearl River Delta PRD region China Ying Liu1 Min Shao1 Sihua Lu1 Chih-chung Chang2 Jia-Lin Wang3 and Gao Chen4 1 State Joint Key Laboratory of Environmental Simulation and Pollution Control College of Environmental Sciences and Engineering Peking University Beijing China 2Research Center of Environment Change Academia Sinica Nankang Taipei 115 Taiwan 3Department of Chemistry National Central University Chungli 320 Taiwan 4NASA Langley Research Center Hampton VA 23681 USA Received 3 September 2007 - Published in Atmos. Chem. Phys. Discuss. 16 October 2007 Revised 6 February 2008 - Accepted 13 February 2008 - Published 13 March 2008 Abstract. We measured levels of ambient volatile organic compounds VOCs at seven sites in the Pearl River Delta PRD region of China during the Air Quality Monitoring Campaign spanning 4 October to 3 November 2004. Two of the sites Guangzhou GZ and Xinken XK were intensive sites at which we collected multiple daily canister samples. The observations reported here provide a look at the VOC distribution speciation and photochemical implications in the PRD region. Alkanes constituted the largest percentage 40 in mixing ratios of the quantified VOCs at six sites the exception was one major industrial site that was dominated by aromatics about 52 . Highly elevated VOC levels occurred at GZ during two pollution episodes however the chemical composition of VOCs did not exhibit noticeable changes during these episodes. We calculated the OH loss rate to estimate the chemical reactivity of all VOCs. Of the anthropogenic VOCs alkenes played a predominant role in VOC reactivity at GZ whereas the contributions of reactive aromatics were more important at XK. Our preliminary analysis of the VOC correlations .

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