Study on Distribution and Migration of Chromium in Contaminated Site with FPXRF
BIAN Chao
CAI Wutian
LIU Jinwei
LYU Yonggao
CAO Yueting
GENG Tingting
LI Jingjie
ZHANG Tao
CAI Yuemei
Abstract：This paper refers to a kind of instrument'field portable X-Ray fluorescence'(FPXRF) and the Geoprobe soil sampler with which a chromium-residues contaminated site was surveyed,and concentrations of Cr in soil samples were analyzed in-situ.Then the data determined were statistically compared with analytical results from traditional ICP-AES analysis in order to verify exactness of the data form FPXRF.It was showed that under the optimized testing condition,the in-situ test results of FPXRF were in agreement with those ofthe traditional laboratory test,and the detection limit was 19.89 mg/kg.In conclusion,in the Cr contaminated site total Cr and hexavalent Cr were detected in the vadose zone and first group aquifer,and the chromium content changed,characterized by a dynamic process of intermittent rise and fall;the maximum concentrations of Cr and hexavalent Cr in first group aquifer were 400 mg/kg and 390.4 mg/kg,respectively.Obviously,the deep soils beneath the chromium-residues site had beenpolluted by the Cr-containing leachate which vertically migrates downwards;and mainly the first group aquifer was contaminated,which was due to the side runoff diffusion effects of the groundwater.Hopefully,the survey results could provide a reference for the environmental risk assessment of soils and shallow groundwater and the design of remediation of heavy metal contaminated site.
Keywords：chromiumdistribution characteristicsmigration rulecontaminated siteportable XRF analyzerin situ determination
Publication Date：2017-01-01
Online Publishing Date：2025-08-15(First online date of this platform, not the publication date of the document)
Pages：7( 126-132 )