Chinese Science Bulletin

, Volume 55, Issue 7, pp 664–669 | Cite as

Analytical method of Cr stable isotope and its application to water pollution survey

  • YongJuan Gao
  • Teng Ma
  • WenLi LingEmail author
  • CunFu Liu
  • Li Li
Articles Environmental Science & Technology


High Cr (VI) concentration is a potential serious risk to environment and ecologic system. Thus, it is essential to effectively monitor Cr contamination in water systems and scientifically evaluate its evolution trend. A new method of in-situ tracer technique by Cr isotopic analysis for quantitatively estimating Cr-contamination and its regional evolution in natural waters as well as a case application are reported in this paper. Based on documented literatures, an experimental procedure for chemical separation and purification of Cr in water samples and its analytical method for Cr isotopic measurement by thermal ionization mass spectrometry (TIMS) are established. Eleven samples collected around a chemical factory in Hubei Province were analyzed by this technique. These samples show δ 53Cr values ranging from −1.7‰ to 7.3‰ and an elevating trend with an increasing in distance from the sampling site to pollution source. A functional correlation following Rayleigh fractionation law was established between sample’s δ 53Cr value and its extent of Cr contamination. This study suggests that Cr isotopic analysis is an effective method to reveal the spatial distribution and its evolution trend of Cr contamination in the regional water system. It is thus helpful to assessing the self-purifying ability of local water system according to Cr isotopic fractionation.


Cr contamination Cr isotope analytical protocol case application pollution assessment 


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Copyright information

© Science in China Press and Springer Berlin Heidelberg 2009

Authors and Affiliations

  • YongJuan Gao
    • 1
    • 2
    • 3
  • Teng Ma
    • 4
    • 5
  • WenLi Ling
    • 1
    • 2
    Email author
  • CunFu Liu
    • 4
    • 5
  • Li Li
    • 4
    • 5
  1. 1.Faculty of Earth ScienceChina University of GeosciencesWuhanChina
  2. 2.State Key Laboratory of Geological Processes and Mineral ResourcesChina University of GeosciencesWuhanChina
  3. 3.Graduate SchoolChina University of GeosciencesWuhanChina
  4. 4.Biogeological and Environmental Geology Laboratory of Ministry of Education (China University of Geosciences)WuhanChina
  5. 5.Sino-Hungary Joint Laboratory of Environmental Sciences and HealthChina University of GeosciencesWuhanChina

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