Research on Geochemical Characteristics of Soil in a Chemical Industrial Factory Site in Jinan City

Qing-ling ZHAO; Mao-guo AN; Hong-nian CHEN; Xiao-hua WU; Qing-cai LI; Cai WANG

doi:10.15898/j.cnki.11-2131/td.201708240135

Rock and Mineral Analysis > 2018 > 37(2): 201-208. > DOI: 10.15898/j.cnki.11-2131/td.201708240135

Qing-ling ZHAO, Mao-guo AN, Hong-nian CHEN, Xiao-hua WU, Qing-cai LI, Cai WANG. Research on Geochemical Characteristics of Soil in a Chemical Industrial Factory Site in Jinan City[J]. Rock and Mineral Analysis, 2018, 37(2): 201-208. DOI: 10.15898/j.cnki.11-2131/td.201708240135

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Research on Geochemical Characteristics of Soil in a Chemical Industrial Factory Site in Jinan City

Lunan Geo-engineering Exploration Institute of Shandong Province, Yanzhou 272100, China

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Received Date: August 23, 2017
Revised Date: December 11, 2017
Accepted Date: March 20, 2018
Published Date: February 28, 2018

Abstract

HIGHLIGHTS
(1) The horizontal and vertical distribution characteristics of Cr(Ⅵ) and total Cr in sampled soil were illustrated.

(2) The existing forms of Cr were investigated and the results show that the content of exchangeable Cr is roughly equivalent to Cr(Ⅵ).

(3) The impact of physical and chemical indexes on total Cr and Cr(Ⅵ) was studied. The effect of pH of soil on total Cr was obvious.

(4) Cluster analysis indicated that the accumulation of Cr was caused by anthropogenic pollution.

ABSTRACT

With the upgrade of urban industrial distribution, high pollution and energy-intensive companies were closed and moved. It is of great importance to investigate the geochemical characteristics of these abandoned soils for risk control of polluted sites. 100 soil samples at the site of a former chemical industrial factory in Jinan were collected and 42 indices, including concentration of total Cr, Cr(Ⅵ) and pH were analyzed to understand the geochemical characteristics of the site. Results show that total Cr concentration of the collected samples was 1025-2450 mg/kg and Cr(Ⅵ) concentration was 557.0-996.5 mg/kg (46.77% of the total Cr). At soil depth ranging from 0 to 80 cm, concentration change of total Cr and Cr(Ⅵ) was not significant. With the increase of soil depth, proportion of exchangeable Cr tended to decrease while residue Cr tended to increase. Total Cr concentration showed negative correlation with pH value while Cr(Ⅵ) did not show significant correlation with pH value. Cluster analysis demonstrated that the source of Cr in the site soil was different from that of other elements, which was mainly caused by the man-made pollution due to long-term heaps of chromium slag at the chemical plant. The other components had similar natural sources to the soil in the country and the Huang-Huai-Hai Plain.
- geochemical characteristics,
- total Cr,
- Cr (Ⅵ),
- soil,
- cluster analysis,
- chemical industrial factory

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