Thabit, F., Rizk, S., Usman, A. (2025). 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, 16(4), 47-60. doi: 10.21608/jssae.2025.363274.1271
Fatma N. Thabit; Shaymaa Rizk; A. R. A. Usman. "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, 16, 4, 2025, 47-60. doi: 10.21608/jssae.2025.363274.1271
Thabit, F., Rizk, S., Usman, A. (2025). '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, 16(4), pp. 47-60. doi: 10.21608/jssae.2025.363274.1271
Thabit, F., Rizk, S., Usman, A. 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, 2025; 16(4): 47-60. doi: 10.21608/jssae.2025.363274.1271
Biochar and Phosphorus-Loaded Biochar Derived from Wood Chips or Poultry Manure Reduced Availability and Uptake of Cadmium by Plants from Cd-Contaminated Soils
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.
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