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Title: Improvement in soil and sorghum health following the application of polyacrylate polymers to a Cd-contaminated soil
Author: Varennes, A.
Mourato, M.P.
Martins, L.L.
Cardoso, A.I.
Mota, A.M.
Pinto, A.P.
Gonçalves, M.L.
Guiwei, Qu
Keywords: cadmium
enzymatic activities
oxidative stress
polyacrylate polymers
Issue Date: 2010
Publisher: Elsevier
Citation: "Journal of Hazardous Materials". ISSN 0304-3894. 173 (2010) 570-575
Abstract: Contamination of soils with cadmium (Cd) is a serious global issue due to its high mobility and toxicity. We investigated the application of insoluble polyacrylate polymers to improve soil and plant health. Sorghum was grown in a Cd-contaminated sandy soil. Polyacrylate polymers at 0.2% (w/w) were added to half of the soil. Control soil without plants was also included in the experiment. Growth of sorghum was stimulated in the polymer-amended soil. The concentration of Cd in the shoots, and the activities of catalase and ascorbate peroxidase decreased in plants from polymer-amended soil compared with unamended control. The amount of CaCl2-extractable Cd in the polymer-amended soil was 55% of that in the unamended soil. The Cd extracted in sorghum shoots was 0.19mg per plant grown on soil without polymer and 0.41mg per plant grown on polymer-amended soil. The total amount of Cd removed from each pot corresponded to 1.5 and more than 6% of soil CaCl2-extractable Cd in unamended and polymeramended soil, respectively. The activities of soil acid phosphatase,beta-glucosidase, urease, protease and cellulase were greatest in polymer-amended soil with sorghum. In conclusion, the application of polyacrylate polymers to reduce the bioavailable Cd pool seems a promising method to enhance productivity and health of plants grown on Cd-contaminated soils.
Description: Research Article
ISSN: 0304-3894
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Appears in Collections:DQAA - Artigos de Revistas

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