Biochar and Phosphorus-Loaded Biochar Derived from Wood Chips or Poultry Manure Reduced Availability and Uptake of Cadmium by Plants from Cd-Contaminated Soils | ||||
| Journal of Soil Sciences and Agricultural Engineering | ||||
| Article 1, Volume 16, Issue 4, April 2025, Page 47-60 PDF (1.4 MB) | ||||
| Document Type: Original Article | ||||
| DOI: 10.21608/jssae.2025.363274.1271 | ||||
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| Authors | ||||
Fatma N. Thabit  1; Shaymaa Rizk2; A. R. A. Usman3
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| 1Soil and Water Department, Faculty of Agriculture, Sohag University, Sohag, Egypt | ||||
| 2Geology Department, Faculty of Science, Sohag University, Sohag, Egypt | ||||
| 3Soils and Water Department, Faculty of Agriculture, Assiut University, Assiut, Egypt | ||||
| Abstract | ||||
| This study investigated the effect of biochar (BC) and phosphorous-loaded biochar (P-BC) derived from wood chips and poultry manure on soil cadmium availability to plants in Cd-contaminated soils. The wood chips (WC) and poultry manure (PM) pyrolyzed at 400 °C to produce BCs samples. Additionally, BC samples were treated with KH2PO4 solution to produce P-BC. The effectiveness of produced BCs in removing Cd ions from aqueous solutions containing 1, 10, 25, 50, and 100 mg Cd L-1 was examined and the Cd2+ adsorption was described using Freundlich, Langmuir, and Temkin isotherm models. A pot experiment was also carried out to assess WC-BC, WCP-BC, PM-BC, and PMP-BC impacts on the growth, nutrients uptake, and availability of P and cadmium to wheat plants in soils spiked with 1, 10, 100, and 1000 mg Cd kg-1 soil. The BCs were applied to soil at a level of 3% (w:w). The results of the adsorption experiment showed that Freundlich model fitted the Cd adsorption (R2= 0.9962 – 0.9988) more than other isotherm models. The P-BCs application increased soil available P, plant growth and N, P, K uptakes. Meanwhile the soil available Cd, shoot Cd concentrations and its uptake decreased compared to BCs and control. The PM-BC was better than the WC-derived ones in improving these parameters. Applying BC and P-BC to Cd-contaminated soil introduce a promising tool to immobilize cadmium with positive impacts on soil properties and plant growth. Additionally, these biochars can be used for Cd2+ removing from aqueous solutions and waste-polluted water. | ||||
| Keywords | ||||
| Soil contamination; Biochar; Cadmium; Soil remediation | ||||
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