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Interaction of Sugarcane Bagasse Biochars and Salinity on Availability and Fraction of Cadmium in a Clay Loam Calcareous Soil
- Source :
- علوم آب و خاک, Vol 25, Iss 4, Pp 33-46 (2022)
- Publication Year :
- 2022
- Publisher :
- Isfahan University of Technology, 2022.
-
Abstract
- 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.
- Subjects :
- biochar
salinity
cadmium
chemical forms
Agriculture
Agriculture (General)
S1-972
Subjects
Details
- Language :
- Persian
- ISSN :
- 24763594 and 24765554
- Volume :
- 25
- Issue :
- 4
- Database :
- Directory of Open Access Journals
- Journal :
- علوم آب و خاک
- Publication Type :
- Academic Journal
- Accession number :
- edsdoj.7b29c4fc7dd5407bb202f38d730ad33b
- Document Type :
- article