Controls on the spatial distribution of iodine in groundwater in the Hebei Plain, China
- 37 Downloads
In the Hebei Plain of North China, 70% of the inhabitants depend on groundwater for drinking water. Little is known regarding high-iodine concentrations in groundwater because there have been few systematic studies on high levels of iodine in groundwater in this region. To help identify the mechanisms that control the spatial distribution of iodine in groundwater, 61 samples of shallow groundwater and 161 samples of deep groundwater were collected along a sample section from Taihang Mountain to the Bo Sea. There were four pockets of high-iodine concentrations along the sample section. As the groundwater depth increased, the ratio of undetected iodine decreased, and the ratio of high-iodine concentrations increased. The high-iodine concentrations in the groundwater reflect the geological and sedimentary settings, and were mainly controlled by pH and Eh. Iodine concentrations were particularly high when the pH was between 7.3 and 8.5, and there was an inflection point at 150 μg/L in the curve of the relationship between iodine concentrations and Eh.
KeywordsIodine Groundwater pH Eh North China Plain
The authors thank Paul Seward, PhD, from Liwen Bianji, Edanz Group China (www.liwenbianji.cn/ac), for editing the English text of a draft of this manuscript.
- Andersen S, Lauberg P (2009) The nature of iodine in drinking water. In: Preedy VR, Burrow GN, Watson R (eds) Comprehensive handbook of iodine nutritional, biochemical, pathological and therapeutic aspects. Academic Press, London, pp 125–134Google Scholar
- Chen W (1999) Groundwater in Hebei Plain. Seismological Press, Beijing, p 76Google Scholar
- Niu G, Wang M (1991) Analysis of iodine in shallow groundwater of eastern Handan plain. Groundwater 2:108–110Google Scholar
- Shen HM, Zhang SB, Liu SJ, Su XH, Shen YF, Han HP (2007) Study on the geographic distribution of national high water iodine areas and the contours of water iodine in high iodine areas. Chin J Endemiol 26:658–661Google Scholar
- Tian WF, Zhao ZH (1997) Formation and exploitation of the iodine groundwater in the eastern Hebei Plain. Hydrogeol Eng Geol 5:33–36 (in Chinese with English abstract)Google Scholar
- WHO (2007) In: Andersson M, de Benoist B, Darnton-Hill I, Delange F (eds) Iodine deficiency in Europe: a continuing public health problem. World Health Organization, UNICEF, France, pp 1–86Google Scholar
- Yan YQ, Zhao JK, Sun XF, Tian EJ, Li LY, Guo SY (2004) The study on the effects of excessive important trace elements (iodine excess) on health. Chin J Endemiol 23(4):378–379 (in Chinese with English abstract)Google Scholar
- Yu Z (1981) Ecology of iodine and goiter. J Hebei Med Coll 2:134–138 (in Chinese with English abstract)Google Scholar
- Zhang Z, Fei Y (2009) Groundwater sustainable use atlas in north China plain. Geological Publishing House, Beijing (in Chinese)Google Scholar
- Zhao Z, Tian W (1988) Preliminary study on causes and distribution of shallow high-iodine groundwater in Cangzhou City. Hydrogeol Eng Geology 6:44–47 (in Chinese with English abstract)Google Scholar