TY - JOUR
T1 - Effects of biochar and the earthworm Eisenia fetida on the bioavailability of polycyclic aromatic hydrocarbons and potentially toxic elements
AU - Gomez-Eyles, Jose L.
AU - Sizmur, Tom
AU - Collins, Chris D.
AU - Hodson, Mark E.
N1 - ©2010, Elsevier Ltd.
PY - 2011/2
Y1 - 2011/2
N2 - 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). 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. (C) 2010 Elsevier Ltd. All rights reserved.
AB - 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). 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. (C) 2010 Elsevier Ltd. All rights reserved.
UR - http://www.scopus.com/inward/record.url?scp=78650509734&partnerID=8YFLogxK
U2 - 10.1016/j.envpol.2010.09.037
DO - 10.1016/j.envpol.2010.09.037
M3 - Article
VL - 159
SP - 616
EP - 622
JO - Environmental Pollution
JF - Environmental Pollution
SN - 0269-7491
IS - 2
ER -