Although numerous amendments show well-defined efficiencies for the remediation of soils contaminated with metals, metalloids, and organic compounds separately, few technologies have been developed capable of remediating multi-contaminated soils. In this study, carbon foams prepared from sucrose with and without impregnation with iron species were applied at a 10% dose to immobilize As on two industrial soils co-contaminated with Hg and PAHs. The results obtained by the toxicity characteristic leaching procedure (TCLP) test showed that the application of the sucrose foam loaded with iron nanoparticles decreased the leachability of As in both soils (15–20%), being statistically significant only in the case of T soil, whereas the availability of Hg was considerably reduced with both sucrose foams (50–60%). With regard to the bioavailable fraction of PAHs determined by a non-exhaustive technique, the treatment with the carbon foams caused a significant decrease of PAH content (90–96%). The macro-, meso- and microporosity of the sucrose foams (S_BET ∼300 m² g⁻¹), their structure based on condensed aromatic sheets, and the possibility of depositing iron nanoparticles on their surface (FeOOH and Fe₃O₄) make them promising new amendments for the sustainable remediation of multi-contaminated soils.

中文翻译：

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与 Fe 纳米粒子组装的生物基碳泡沫可同时修复共同污染的工业土壤中的 As、Hg 和 PAH

尽管许多修正案显示了分别修复受金属、类金属和有机化合物污染的土壤的明确效率，但很少有技术能够开发出能够修复多重污染土壤的技术。在这项研究中，以 10% 的剂量施用由蔗糖制备的经铁物质浸渍和未经铁物质浸渍的碳泡沫，以将砷固定在两种同时受到汞和多环芳烃污染的工业土壤上。毒性特征浸出程序（TCLP）测试结果表明，施用负载纳米铁颗粒的蔗糖泡沫降低了两种土壤中砷的浸出率（15-20%），仅在T土中具有统计显着性，而两种蔗糖泡沫中汞的利用率显着降低（50-60%）。对于通过非详尽技术测定的 PAH 生物可利用部分，碳泡沫处理导致 PAH 含量显着下降 (90-96%)。蔗糖泡沫的宏观、介观和微观孔隙率（S _BET ∼300 m ² g ^-1），其基于稠合芳香片的结构，以及在其表面沉积铁纳米粒子（FeOOH 和 Fe ₃ O ₄）的可能性使他们有望为多重污染土壤的可持续修复提供新的修正。