Distribution characteristics and source of BTEX in groundwater of Eastern Foshan, Guangdong
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Abstract:
In order to determine the distr ibut ion character istics o f BTEX ( including Benzene, To luene, Et hy lbenzene, o2Xylene, m2 Xylene, and o2Xylene) in gr oundw ater, 37 g ro ups of gr oundw at er sam ples and 10 surface wat er samples collected fr om the east2 er n area of Foshan in Guangdong dur ing 2005 to 2008 wer e tested using t he gas chr omatog ra phy and mass spectrum ( GC/ MS) . The results showed that the detection rate of BTEX is 24. 32% in g ro undw ater , and the to tal BTEX co ncentrat ion is low er than 27. 2 Lg / L. Among the six kinds of BTEX, T oluene had t he hig hest detectio n r ate ( 24. 32%) and detect ion value ( 10. 7 Lg/ L) , which was fo llow ed by Benzene w ith the detectio n r ate of 10. 81% and detectio n v alue of 9 Lg / L respect ively. Ethy lbenzene, p2 Xylene, m2Xylene, and o2Xylene w ere only detect ed in a few of samples, and the concentr ations in gr oundw ater did not exceed the st andard. Mo st of samples with BT EX w ere dist ributed in Nanhai ar ea, and most o f g ro undwater samples w ere detected con2 taining only one kind o f BTEX. There w as an obvio us co rr elation bet ween the BT EX distributio ns in gr oundw ater and sur face water , and To luene and Benzene wer e the dominating BTEX in surface water . The infiltration o f surface water co nta ining BT EX is an impo rtant source of BTEX in g ro undw ater of the easter n a rea of Foshan.
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