Mechanisms of Cu2+ Immobilization Using Carbonyl Iron Powder–Biochar Composites for Remediating Acidic Soils from Copper Sulfide Mining Areas

Sustainability, Год журнала: 2025, Номер 17(10), С. 4281 - 4281

Опубликована: Май 8, 2025

Soil heavy metal contamination poses critical challenges to ecological sustainability in mining regions, particularly acidic soils from copper sulfide mines. This study developed a sustainable remediation strategy using carbonyl iron powder–biochar composite (CIP@BC) derived agricultural waste (rice husk) and industrial byproducts. The was synthesized through an energy-efficient mechanical grinding method at 10:1 mass ratio of biochar powder, aligning with circular economy principles. Material characterization revealed CIP particles uniformly embedded within biochar’s porous structure, synergistically enhancing surface functionality redox activity. CIP@BC demonstrated exceptional Cu2+ immobilization capacity (910.5 mg·g−1), achieved chemisorption monolayer adsorption mechanisms. Notably, the process concurrently improved key soil health parameters. incubation trials that 6% application elevated pH 4.27 6.19, reduced total Cu content by 29.43%, decreased DTPA-extractable 67.26%. treatment effectively transformed speciation bioavailable residual fractions. Concurrent improvements electrical conductivity (EC), cation exchange (CEC), organic matter (OM), water (SWC) collectively highlighted composite’s multifunctional potential. bridges environmental land management innovative waste-to-resource approach remediates mine soils. dual contaminant quality restoration provides scalable solution.

Язык: Английский

Advances in sustainable production of biochar and biochar-based nanocomposites: A critical review

Journal of Cleaner Production, Год журнала: 2025, Номер unknown, С. 145752 - 145752

Опубликована: Май 1, 2025

Язык: Английский