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An analysis on the occurrence and biological availability of the heavy metals in soils of the central and southern plain in Hebei Province
|Authors:||Cui Xingtao; Wang Xueqiu; Luan Wenlou|
|Author Affiliations:||Primary: |
hinese Academy of Geological Sciences, Institute of Geophysical and Geochemical Exploration, Langfang, China
Shijiazhuang University of Economics, China
|Volume Title:||Zhongguo Dizhi Geology in China|
|Source:||Zhongguo Dizhi = Geology in China, 42(2), p.655-663. Publisher: Science Press, Beijing, China. ISSN: 1000-3657|
|Note:||In Chinese with English summary. 23 refs.; illus., incl. 5 tables, sketch map|
|Summary:||Based on studies of topsoil in the central and southern plain of Hebei, the authors analyzed the morphology of seven heavy metals in topsoil, evaluated the biological availability of heavy metal elements, and studied the factors that might affect the biological availability of heavy metal elements through a correlation analysis. The results show that the content of element-available Cd is 36.83% in topsoil, the highest of all metal elements that have greater potential ecological harmfulness. The content of element-available and carbonate Pb is respectively 13.37% and 12.38%, suggesting smaller harmfulness because of neutral and alkaline soil in the study area. The total values of Cu, Hg, Cr, As, and Zn that maintain the stable state account for more than 90%, implying smaller harmfulness. The activity coefficients and migration coefficients of heavy metal elements in topsoil in the study area are respectively arranged Cd > Pb > Hg > Cu > Zn > As > Cr and Cd > Hg > As > Cu > Pb > Zn > Cr, with the average of Cd achieving respectively 0.330 and 0.160, implying strong biological activity, instability, and migration capability. Other soil heavy metals show smaller activity coefficients (except Pb) and migration coefficients, indicating that their biological activities are weak, and it is difficult for them to transfer from soil to plants. The correlations between biological effectiveness and the influential factors of various heavy metals are not the same; nevertheless, the dominant factor is the total amount of soil heavy metal elements, followed by pH, TOC, CEC, clay content, and other factors. There are complicated relations between them.|
|Subjects:||Bioavailability; Biodegradation; Chemical elements; Geochemistry; Heavy metals; Migration of elements; Occurrence; Plains; Pollution; Soil pollution; Statistical analysis; Asia; China; Far East; Hebei China|
|Coordinates:||N370000 N390000 E1170000 E1150000|
|Copyright Information:||GeoRef, Copyright 2021 American Geosciences Institute.|
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