University of Reading, School of Human and Environmental Sciences, Soil Research Centre, Reading, RG6 6DW Berkshire, UK.
Environ Pollut. 2011 Feb;159(2):616-22. doi: 10.1016/j.envpol.2010.09.037. Epub 2010 Oct 29.
Polycyclic aromatic hydrocarbons (PAHs) and potentially toxic elements (PTEs) were monitored over 56 days in calcareous contaminated-soil amended with either or both biochar and Eisenia fetida. Biochar reduced total (449 to 306 mg kg(-1)) and bioavailable (cyclodextrin extractable) (276 to 182 mg kg(-1)) PAHs, PAH concentrations in E. fetida (up to 45%) but also earthworm weight. Earthworms increased PAH bioavailability by >40%. Combined treatment results were similar to the biochar-only treatment. Earthworms increased water soluble Co (3.4 to 29.2 mg kg(-1)), Cu (60.0 to 120.1 mg kg(-1)) and Ni (31.7 to 83.0 mg kg(-1)) but not As, Cd, Pb or Zn; biochar reduced water soluble Cu (60 to 37 mg kg(-1)). Combined treatment results were similar to the biochar-only treatment but gave a greater reduction in As and Cd mobility. Biochar has contaminated land remediation potential, but its long-term impact on contaminants and soil biota needs to be assessed.
多环芳烃（PAHs）和潜在有毒元素（PTEs）在 56 天内被监测，研究了添加生物炭和赤子爱胜蚓的钙质污染土壤中总（449 到 306 毫克/千克）和生物可利用（环糊精提取）（276 到 182 毫克/千克）的 PAHs、赤子爱胜蚓体内的 PAH 浓度（高达 45%）以及蚯蚓的体重。赤子爱胜蚓增加了 PAH 的生物可利用性（超过 40%）。联合处理的结果与仅用生物炭处理的结果相似。赤子爱胜蚓增加了水溶性 Co（3.4 到 29.2 毫克/千克）、Cu（60.0 到 120.1 毫克/千克）和 Ni（31.7 到 83.0 毫克/千克），但不增加 As、Cd、Pb 或 Zn；生物炭降低了水溶性 Cu（60 到 37 毫克/千克）。联合处理的结果与仅用生物炭处理的结果相似，但使 As 和 Cd 的迁移性降低更大。生物炭具有污染土地修复的潜力，但需要评估其对污染物和土壤生物群的长期影响。
