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典型铬渣污染场地铬污染特征研究
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引用本文:谢 浩,邹胜章,周长松,朱丹尼,曹建文,卢海平.典型铬渣污染场地铬污染特征研究[J].中国岩溶,2019,(2):202-207. XIE Hao,ZOU Shengzhang,ZHOU Changsong,ZHU Danni,CAO Jianwen,LU Haiping.Study on characteristics of chromium pollution in a typical chromium slag contaminated site[J].Carsologica Sinica,2019,(2):202-207.
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谢 浩 中国地质大学(北京),北京 100083/中国地质科学院岩溶地质研究所/自然资源部、广西岩溶动力学重点实验室广西 桂林 541004 
邹胜章 中国地质科学院岩溶地质研究所/自然资源部、广西岩溶动力学重点实验室广西 桂林 541004 
周长松 中国地质科学院岩溶地质研究所/自然资源部、广西岩溶动力学重点实验室广西 桂林 541004 
朱丹尼 中国地质科学院岩溶地质研究所/自然资源部、广西岩溶动力学重点实验室广西 桂林 541004 
曹建文 中国地质科学院岩溶地质研究所/自然资源部、广西岩溶动力学重点实验室广西 桂林 541004 
卢海平 中国地质科学院岩溶地质研究所/自然资源部、广西岩溶动力学重点实验室广西 桂林 541004 
基金项目:国家重点研发计划(2017YFC0406104);国土资源部地质调查项目(1212011121166、1212011121164、DD20160300、DD20160302);环境保护部公益性行业专项(2017A079)
中文摘要:选取西南岩溶区某傍河铬渣堆场为研究对象,对场地不同位置与深度的土壤及地下水样品进行采集,通过数理统计对Cr在场地中的空间分布特征以及场地对地下水的影响进行了分析。结果表明:土壤中总Cr浓度的水平分布具有差异性,表层土壤Cr浓度由上游到下游呈明显降低趋势,变化率为3.59;深层饱水带土壤中总Cr浓度分布受到地下水流场的影响,场地下游土壤铬浓度明显高于上游;杂填土垂向剖面的铬浓度分布不同于坡残积红黏土,杂填土中铬浓度随着深度的增加而增加,浓度与土壤深度的关系可用y=63.88ln(x)-75.221来表示;而在红黏土中剖面中,铬大量聚集在土壤表层,后随着深度的增加铬浓度逐渐降低,接近基岩面有升高趋势;场地地下水中Cr(Ⅵ)的浓度受深层土壤中总Cr浓度的影响,两者呈正相关。
中文关键词:铬污染  铬渣污染场地  红黏土  杂填土  次生污染源
 
Study on characteristics of chromium pollution in a typical chromium slag contaminated site
Abstract:In this paper, a chromium slag site near a river in a karst area in southwestern China was selected as the research object. The soil and groundwater samples were collected at different locations and depths of the site. The spatial distribution characteristics of chromium (as Cr) in the site and its influence on groundwater were analyzed by means of mathematical statistics. The results show that the horizontal distribution of total Cr concentration in soil is different, and the concentration of Cr in surface soil decreased significantly from upstream to downstream with a change rate of 3.59 .The distribution of total Cr in deep soil at saturated zone is affected by the flow field of groundwater, and the Cr concentration in downstream is subsequently higher than that in the upstream. The concentration of chromium in vertical profile of miscellaneous backfill soil is different from that of diluvial-residual red clay in the slopes, the Cr concentration in miscellaneous backfill soil increases with the increase of depth, and the relationship between it concentration and soil depth can be represented by . In the red clay section, most of the Cr is gathered on the surface, and then its concentration decreases with the increase of depth, which tends to increase near the bedrock surface. The concentration of Cr (VI) in groundwater samples is affected by total Cr concentration in the deep soil, and the two are positively correlated.
keywords:chromium pollution, chromium slag contaminated site, red clay, miscellaneous fill soil, secondary pollution sources
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