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The distribution and bioavailability of Cd and Zn in cultivated soil of Henan Province

Posted on 28. October, 2011.

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With continuing population growth and rapid economic development of China, the environmental quality of rural soil is becoming more and more important with regard to human health. A study reported in Chemical Speciation and Bioavailability assesses the spatial changes of Cd and Zn in the surface soil in the Henan Province cultivated area.

Henan Province is the largest developing district with the largest population in China. By the end of 2006, Henan had 97 million people. People in the rural population comprise 71.1% of the total people in Henan Province. With continuing population growth and rapid economic development of China, the environmental quality of rural soil is becoming more and more important with regard to human health. The objective of this study was to assess the spatial changes of the metals in the surface soil in the Henan Province cultivated area. Specifically: (1) the total content of Cd and Zn in the surface soil was measured, (2) the chemical forms of the metals in the soil were determined using a sequential fractionation procedure, and (3) bioavailabilities of Cd and Zn were assessed. For the sampled cultivated soil in Henan Province, the distribution of heavy metal fractions varied greatly between Cd and Zn.

doi: 10.3184/095422911X13103657478624

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