This study investigated the effectiveness of sugarcane bagasse biochar (SBB) in reducing the toxicity of heavy metals (HMs) in Cd-contaminated calcareous clay soil and improving the growth of rice (Oryza sativa L.). A pot experiment with a randomized complete block design (RCBD) was used to examine the adsorption kinetics and growth improvement of rice. Three Cd levels (0.0, 30.0, and 60.0 mg kg⁻¹ of soil from CdSO₄. 8H₂O) and three SBB levels (0.0, 3.0, and 6.0% by weight) were considered. The study found that the biochar's surface contains functional groups that aid in the immobilization of Cd in contaminated soil. The Langmuir model best fit the Cd adsorption data of all studied soils, predicting the highest adsorption capacity with an R² value of 0.9902 for the adsorption of Cd onto soil-SBB 6%. Single application of SBB at a 6% level significantly increased rice grain and biomass by 45.41 and 57.82%, respectively, in soils containing 30 and 60 mgkg⁻¹ soil Cd, compared to single soil Cd treatments. Addition of SBB at a 6% level also significantly reduced the amounts of Cd extracted using DTPA by 53.37 and 45.14%, respectively, and absorption of Cd by 67.00 and 52.14% in soils containing 30 and 60 mgkg⁻¹ Cd. The results suggest that incorporating SBB into soil is a suitable remedial method for promoting plant growth in Cd-contaminated soils.

本研究调查了甘蔗渣生物炭 (SBB) 在降低受 Cd 污染的石灰质粘土中重金属 (HMs) 毒性和促进水稻 (Oryza sativa L.) 生长方面的有效性。使用随机完全区组设计 (RCBD) 的盆栽试验来检查水稻的吸附动力学和生长改善。三个 Cd 水平（0.0、30.0 和 60.0 mg kg ⁻¹土壤中的 CdSO ₄ . 8H ₂O) 和三个 SBB 水平（按重量计 0.0、3.0 和 6.0%）被考虑在内。研究发现，生物炭的表面含有有助于将镉固定在受污染土壤中的官能团。Langmuir 模型最适合所有研究土壤的 Cd 吸附数据，预测Cd 在土壤-SBB 6% 上的吸附容量最高，R ^{2值为 0.9902。在含有 30 和 60 mgkg −1}的土壤中，单次施用 6% 的 SBB 可显着增加水稻籽粒和生物量，分别增加 45.41 和 57.82%土壤 Cd，与单一土壤 Cd 处理相比。添加 6% 水平的 SBB 也显着减少了使用 DTPA 提取的 Cd 量，分别减少了 53.37% 和 45.14%，并且在含有 30 和 60 mgkg -1 Cd 的土壤中，Cd 的吸收减少了 67.00% 和 52.14 ^%。结果表明，将 SBB 掺入土壤是促进 Cd 污染土壤中植物生长的合适修复方法。