Volume 25, Issue 4 (Winiter 2022)                   jwss 2022, 25(4): 33-46 | Back to browse issues page

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Mirzakhani E, Motaghian H, Hosseinpur A. Interaction of Sugarcane Bagasse Biochars and Salinity on Availability and Fraction of Cadmium in a Clay Loam Calcareous Soil. jwss 2022; 25 (4) :33-46
URL: http://jstnar.iut.ac.ir/article-1-4093-en.html
Shahrekord university , motaghian.h@yahoo.com
Abstract:   (1559 Views)
Pollution of the environment by heavy metals, especially soil pollution with cadmium (Cd), is one of the most important environmental problems. Also, salinization of soils due to a decrease in irrigation water quality reduces plants growth. To investigate the effect of sugarcane bagasse biochars and salinity on Cd available and Cd fractions in a contaminated soil (15 mg kg-1 Cd), an experimental factorial design in a completely randomized design including (1) biochar factor with control, 1% (w/w) bagasse, 1% (w/w) biochar 400 °C and 1% (w/w) biochar 600 °C, and (2) salinity factor with control, 20, and 40 mmol kg-1 as sodium chloride were performed in 3 replications. The amount of available Cd was determined by the DTPA-TEA method and the Cd fractions were determined by Tessier et al. (1979). The results showed that biochar and salinity had no significant effect on soil pH (P > 0.05) but increased soil EC (P < 0.05). Interaction of biochar and salinity was not significant (P > 0.05) on available Cd and Cd fractions. Biochar application reduced Cd -DTPA-TEA (P < 0.05), whereas salinity increased Cd -DTPA-TEA (P < 0.05). Application of biochar prepared at 600 °C reduced (P < 0.05) exchangeable Cd (23.8%) and increased (P < 0.05) Cd associated with iron and manganese oxides (25.2%) and residual (15.6%) compared to the control. The results showed that salinity had no significant effect on the Cd fractions (P > 0.05) and soil treated with sugarcane bagasse biochar can reduce Cd available due to changing the Cd distribution from unstable forms to stable forms.
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Type of Study: Research | Subject: Ggeneral
Received: 2020/11/12 | Accepted: 2021/02/28 | Published: 2022/03/1

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