Hexachloro benzene in the Nanshan Karst systems, China

Authors

  • MJ Alam Dept. of Chemistry, University of Dhaka, Dhaka
  • Y Daoxian School of Geographical Sciences, Institute of Karst Environment and Rock Desertification Rehabilitation, Southwest University, 400715, Beibei, Chongqing
  • S Yachuan School of Geographical Sciences, Institute of Karst Environment and Rock Desertification Rehabilitation, Southwest University, 400715, Beibei, Chongqing
  • YJ Jiang School of Geographical Sciences, Institute of Karst Environment and Rock Desertification Rehabilitation, Southwest University, 400715, Beibei, Chongqing
  • ME Quayum Dept. of Chemistry, University of Dhaka, Dhaka
  • LJ Cheng School of Geographical Sciences, Institute of Karst Environment and Rock Desertification Rehabilitation, Southwest University, 400715, Beibei, Chongqing

DOI:

https://doi.org/10.3329/bjsir.v50i2.24351

Keywords:

Pollutants, Karsts system, Water, Soil, Sediment

Abstract

Karst areas have much higher ecological vulnerability and are easy to be contaminated with hexachlorinated benzene (HCB) which is introduced as health risk pollutants. HCB concentrations were used to understand the transport of HCB conducted in the Nanshan karst system, China. Water, sediments from the underground river and water, sediments and soil from the surface systems were collected monthly in 2011 - 2012 and HCB were analyzed. The levels of HCB were 19.9 ng L-1 in underground waters and 11.6 ng g-1 in underground sediments while 99.1 ng L-1 in surface waters and 110.5 ng g-1 in surface sediments and 2.8 ng g-1 in soils. Seasonal variations were found in concentrations of HCB both in the waters and the sediments. HCB concentrations varied from 7.8 ng L-1 in winter to 86.9 ng L-1 in spring in the groundwaters and 0.3 ng g-1 in autumn to 36.7 ng g-1 in spring in the underground sediments. HCB concentrations varied from 38.6 ng L-1 in autumn to 1019.8 ng L-1 in spring in the surface waters, 0.7 ng g-1 in autumn to 133.4 ng g-1 in spring in the surface sediments and 2.5 ng g-1 in autumn to 17.4 ng g-1 in winter in soil. The substantial seasonal variation found between underground system and surface system which indicate that the surface systems play major role for the transport and contamination of HCB in the underground river systems due to karst features.

Bangladesh J. Sci. Ind. Res. 50(2), 109-116, 2015

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Author Biography

MJ Alam, Dept. of Chemistry, University of Dhaka, Dhaka



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Published

2015-07-30

How to Cite

Alam, M., Daoxian, Y., Yachuan, S., Jiang, Y., Quayum, M., & Cheng, L. (2015). Hexachloro benzene in the Nanshan Karst systems, China. Bangladesh Journal of Scientific and Industrial Research, 50(2), 109–116. https://doi.org/10.3329/bjsir.v50i2.24351

Issue

Vol. 50 No. 2 (2015)

Section

Articles

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