Immobilization of Cadmium and Lead in Contaminated Soils by Different Amendments

Zong Tang Liu; Gang Ya Zhang; Zhong Sheng Hu

doi:10.4028/www.scientific.net/AMR.415-417.1662

Paper Titles

Theoretical Study of the Effect of Ca Doping on the Electronic Properties of LiCoO₂
p.1643

Study on Diffusion of Copper of SOFC Cu-Based Anodes in Co-Sintering with Electrolyte
p.1647

Control of Surface Quality of if Steel Sheet
p.1651

Study on the Performance of the Modified Single Base Gun Propellant
p.1656

Immobilization of Cadmium and Lead in Contaminated Soils by Different Amendments
p.1662

Preparation of Cationic Rice Husk Flocculant and its Flocculating Characteristics
p.1667

Preparation and Performances of Amino-SiO₂ Filled Cellulose Film
p.1671

Decolorization of Coking Wastewater by Mineral Adsorbents
p.1675

Phase and Electrical Properties of [Li_0.065(Na_0.535K_0.48)_0.95]NbO₃ Lead-Free Piezoelectric Ceramics Sintered at Low Temperature
p.1679

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Immobilization of Cadmium and Lead in Contaminated Soils by Different Amendments

Abstract:

A pot experiment was conducted to investigate the effects of attapulgite clay, activated carbon, and liquid organic fertilizers used as soil amendments on cadmium (Cd) and lead (Pb) immobilization as well as on tobacco growth in contaminated soils. All three amendments reduced the amounts of DTPA-extractable Cd and Pb in soils as well as the concentrations of Cd and Pb in tobacco roots and leaves, compared to the control. Cadmium had a higher transportation index into tobacco leaves than Pb. DTPA-extractable Cd and Pb in soils was positively correlated with the metal concentrations in tobacco leaves, suggesting that DTPA-extractable Cd and Pb measurement could be a feasible method for assessing Cd and Pb bioavailability. Experimental results showed that upward trends of Soil and Plant Analyzer Development (SPAD) value in leaves were observed when tobaccos plants were grown in contaminated soils with increases of all the amendments. There were increases in root and shoot lengths as well as leaf area and dry weight for tobacco grown in amendment treated soils compared to the control.