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陕西某地区地下水Cr(Ⅵ)异常的水化学特征及其富集因素分析

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朱亮, 孙继朝, 张玉玺, 刘景涛. 陕西某地区地下水Cr(Ⅵ)异常的水化学特征及其富集因素分析[J]. 环境化学, 2014, 33(11): 1864-1870. doi: 10.7524/j.issn.0254-6108.2014.11.023
引用本文: 朱亮, 孙继朝, 张玉玺, 刘景涛. 陕西某地区地下水Cr(Ⅵ)异常的水化学特征及其富集因素分析[J]. 环境化学, 2014, 33(11): 1864-1870. doi: 10.7524/j.issn.0254-6108.2014.11.023
shu
ZHU Liang, SUN Jichao, ZHANG Yuxi, LIU Jingtao. Analysis of chemical characteristics and factors for anomalous chromium-rich groundwater in an area, Shanxi Province[J]. Environmental Chemistry, 2014, 33(11): 1864-1870. doi: 10.7524/j.issn.0254-6108.2014.11.023
Citation: ZHU Liang, SUN Jichao, ZHANG Yuxi, LIU Jingtao. Analysis of chemical characteristics and factors for anomalous chromium-rich groundwater in an area, Shanxi Province[J]. Environmental Chemistry, 2014, 33(11): 1864-1870. doi: 10.7524/j.issn.0254-6108.2014.11.023
shu

陕西某地区地下水Cr(Ⅵ)异常的水化学特征及其富集因素分析

  • 1.

    中国地质科学院水文地质环境地质研究所, 石家庄, 050061

  • 基金项目:

    国土资源大调查项目:西北地区主要城市地下水污染调查评价(G201106) 资助.

Analysis of chemical characteristics and factors for anomalous chromium-rich groundwater in an area, Shanxi Province

  • 1.

    Institute of Hydrogeology and Environmental Geology, Chinese Academy of Geological Sciences, Shijiazhuang 050061, China

  • Fund Project:

  • 摘要: 以42组水化学测试数据为基础,结合野外调查资料,分析研究区Cr(Ⅵ)异常地下水的分布规律和水化学特征,探讨Cr(Ⅵ)富集的影响因素.结果表明Cr(Ⅵ)异常地下水主要位于基岩含水层,水化学类型以HCO3-Na、HCO3-Na·Ca型为主,随地下水埋深的增加,Cr(Ⅵ)浓度、γNa+/γCl-系数逐渐增大,γCa2+/γHCO3-系数逐渐减小;与正常水相比,Cr(Ⅵ)异常地下水的pH、溶解氧、离子强度的平均值分别由7.2、4.3 mg·L-1、0.011 mol·L-1变为7.6、5.5 mg·L-1、0.028 mol·L-1,溶解氧增加有利于Cr(Ⅲ)的氧化,pH升高、离子强度降低可以促进Cr(Ⅵ)的活化,这些是促使含水介质中Cr(Ⅵ)的解吸、迁移和富集的主要水化学因素.
    Abstract: Based on 42 water chemistry test data and the field survey data, this paper analyzed the distribution of hexavalent chromium anomaly of groundwater as well as it's chemistry characteristic, and investigated the enrichment factors affecting hexavalent chromium. The results show that hexavalent chromium-rich water was mainly located in bedrock groundwater aquifer, and the main water chemistry type was HCO3-Na or HCO3-Na·Ca. The hexavalent chromium concentration as well as γNa+/γCl- increased with the groundwater depth, but γCa2+/γHCO3- showed an opposite trend. The mean value of pH, DO and ionic strength was 7.2, 4.3 mg·L-1 and 0.011 mol·L-1 respectively in normal groundwater, changed to 7.6, 5.45 mg·L-1 and 0.028 mol·L-1 respectively in hexavalent chromium-rich groundwater. The increased dissolved oxygen was conducive to the oxidation of trivalent chromium in sediment. The elevated pH and decreased ionic strength increases the activity of hexavalent chromium. All these are the main factors affecting the desorption and migration of hexavalent chromium in aquifers.
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  • 收稿日期:  2014-04-09
  • 刊出日期:  2014-11-15
朱亮, 孙继朝, 张玉玺, 刘景涛. 陕西某地区地下水Cr(Ⅵ)异常的水化学特征及其富集因素分析[J]. 环境化学, 2014, 33(11): 1864-1870. doi: 10.7524/j.issn.0254-6108.2014.11.023
引用本文: 朱亮, 孙继朝, 张玉玺, 刘景涛. 陕西某地区地下水Cr(Ⅵ)异常的水化学特征及其富集因素分析[J]. 环境化学, 2014, 33(11): 1864-1870. doi: 10.7524/j.issn.0254-6108.2014.11.023
shu
ZHU Liang, SUN Jichao, ZHANG Yuxi, LIU Jingtao. Analysis of chemical characteristics and factors for anomalous chromium-rich groundwater in an area, Shanxi Province[J]. Environmental Chemistry, 2014, 33(11): 1864-1870. doi: 10.7524/j.issn.0254-6108.2014.11.023
Citation: ZHU Liang, SUN Jichao, ZHANG Yuxi, LIU Jingtao. Analysis of chemical characteristics and factors for anomalous chromium-rich groundwater in an area, Shanxi Province[J]. Environmental Chemistry, 2014, 33(11): 1864-1870. doi: 10.7524/j.issn.0254-6108.2014.11.023
shu

陕西某地区地下水Cr(Ⅵ)异常的水化学特征及其富集因素分析

  • 1. 中国地质科学院水文地质环境地质研究所, 石家庄, 050061
  • 收稿日期:  2014-04-09
基金项目:

国土资源大调查项目:西北地区主要城市地下水污染调查评价(G201106) 资助.

摘要: 以42组水化学测试数据为基础,结合野外调查资料,分析研究区Cr(Ⅵ)异常地下水的分布规律和水化学特征,探讨Cr(Ⅵ)富集的影响因素.结果表明Cr(Ⅵ)异常地下水主要位于基岩含水层,水化学类型以HCO3-Na、HCO3-Na·Ca型为主,随地下水埋深的增加,Cr(Ⅵ)浓度、γNa+/γCl-系数逐渐增大,γCa2+/γHCO3-系数逐渐减小;与正常水相比,Cr(Ⅵ)异常地下水的pH、溶解氧、离子强度的平均值分别由7.2、4.3 mg·L-1、0.011 mol·L-1变为7.6、5.5 mg·L-1、0.028 mol·L-1,溶解氧增加有利于Cr(Ⅲ)的氧化,pH升高、离子强度降低可以促进Cr(Ⅵ)的活化,这些是促使含水介质中Cr(Ⅵ)的解吸、迁移和富集的主要水化学因素.

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