Influence of Inorganic Salts on Concentration of Different Cd Forms in the Soil

Abstract:

Different soluble inorganic salts were irrigated into batches of soil samples by setting contrastive experiments on the basis of Tessier sequential extraction procedure to study their influences upon Cd forms in the soil. Research shows that all the three salts were able to influence the forms of Cd in the soil: NaCl and Na₂SO₄ added into the soil could increase the contents of exchangeable Cd and the higher the concentration, the greater the impact, while Na₂CO₃ could decrease it by 30.35%(4 g/kg Na₂CO₃ added) and 69.87%(8 g/kg Na2CO3 added). Carbonate content of Cd was influenced obviously by NaCl, with the decrease of 7.30%, 10.52% corresponding to low concentration and high concentration of NaCl, and Na₂CO₃ can increase this form slightly, Na₂SO₄ had little effect, so the content remained unchanged. The Fe-Mn oxidation form of Cd remained the original level when NaCl was added in the samples while it increased with the addition of Na₂CO₃ obviously and the concentration increased 8.67% (4 g/kg Na₂CO₃ added) and 51.85% (8 g/kg Na₂CO₃ added),but it decreased by the effect of Na₂SO₄. Organic Cd and the residual Cd fluctuated slightly at a very low concentration. The total Cd decreased with the addition of sodium salt.

• Periodical: Advanced Materials Research (Volumes 356-360)
• Pages: 943-950
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.356-360.943
• Online since: October 2011
• Authors: Pei Yu Liang, Yong Jie Tan, Li Jun Chen, Wei Ke Li
• Keywords: Different Forms of CD, Inorganic Salts, Soil

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