Amelioration of Cadmium Contaminated Soils Using Cation Exchangers |
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| Authors: | Neal W Menzies Katherine E Snars Gillian R Kopittke Peter M Kopittke |
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| Institution: | 1. School of Land, Crop and Food Sciences , The University of Queensland , St. Lucia, Queensland, Australia;2. Cooperative Research Centre for Contamination Assessment and Remediation of the Environment (CRC-CARE) , The University of Queensland , St. Lucia, Queensland, Australia;3. School of Land, Crop and Food Sciences , The University of Queensland , St. Lucia, Queensland, Australia |
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| Abstract: | ABSTRACT The contamination of soil and water with cadmium (Cd) is an environmental issue worldwide. Using lettuce (Lactuca sativa cv. ‘Cos’) in a glasshouse-based growth trial, two cation exchange materials a zeolite and a kaolin amorphous derivate (KAD)] were examined for their ability to remove Cd from the soil solution and hence decrease the uptake of Cd by plants. Zeolite (applied at a rate of 2.5 t ha? 1) was ineffective at reducing Cd uptake and accumulation in lettuce. When applied at a rate of 2.5 t ha? 1, the KAD significantly reduced Cd uptake in all soils examined (ranging from a 26 to 64% reduction). Thus, KAD is considered to be potentially beneficial for the growth of plants in Cd-contaminated soils, although care must be taken to ensure that growth is not limited by deficiencies of the other nutrients for which KAD has a high affinity. |
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| Keywords: | cadmium (Cd) kaolin amorphous derivatives (KAD) phytotoxicity uptake |
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