Abstract
| Original language | English |
|---|---|
| Pages (from-to) | 195-202 |
| Number of pages | 8 |
| Journal | Environmental Pollution |
| Volume | 186 |
| Early online date | 1 Jan 2014 |
| DOIs | |
| Publication status | Published - Mar 2014 |
Fingerprint
Keywords
- soil contamination
- organic amendments
- trace elements
- speciation
- pore water
Cite this
Assessing the influence of compost and biochar amendments on the mobility and toxicity of metals and arsenic in a naturally contaminated mine soil. / Beesley, Luke; Inneh, Onyeka S.; Norton, Gareth J.; Moreno-Jimenez, Eduardo; Pardo, Tania; Clemente, Rafael; Dawson, Julian J.C.
In: Environmental Pollution, Vol. 186, 03.2014, p. 195-202.Research output: Contribution to journal › Article
}
TY - JOUR
T1 - Assessing the influence of compost and biochar amendments on the mobility and toxicity of metals and arsenic in a naturally contaminated mine soil
AU - Beesley, Luke
AU - Inneh, Onyeka S.
AU - Norton, Gareth J.
AU - Moreno-Jimenez, Eduardo
AU - Pardo, Tania
AU - Clemente, Rafael
AU - Dawson, Julian J.C
N1 - Acknowledgements: The authors wish to thank Claire Deacon, Ken Cruickshank, Anette Moran, Dave Hadwen and Lenka Maděrová (University of Aberdeen) and Renate Wendler (The James Hutton Institute) for their assistance with analysis of samples. The authors also gratefully acknowledge the support of COST Action TD 1107 ‘Biochar as option for sustainable resource management’ for granting a short term scientific mission (STSM), which assisted the completion of experimental work for this paper.
PY - 2014/3
Y1 - 2014/3
N2 - Amending contaminated soils with organic wastes can influence trace element mobility and toxicity. Soluble concentrations of metals and arsenic were measured in pore water and aqueous soil extracts following the amendment of a heavily contaminated mine soil with compost and biochar (10% v:v) in a pot experiment. Speciation modelling and toxicity assays (Vibrio fischeri luminescence inhibition and Lolium perenne germination) were performed to discriminate mechanisms controlling metal mobility and assess toxicity risk thereafter. Biochar reduced free metal concentrations furthest but dissolved organic carbon primarily controlled metal mobility after compost amendment. Individually, both amendments induced considerable solubilisation of arsenic to pore water (>2500 μg l−1) related to pH and soluble phosphate but combining amendments most effectively reduced toxicity due to simultaneous reductions in extractable metals and increases in soluble nutrients (P). Thus the measure–monitor-model approach taken determined that combining the amendments was most effective at mitigating attendant toxicity risk.
AB - Amending contaminated soils with organic wastes can influence trace element mobility and toxicity. Soluble concentrations of metals and arsenic were measured in pore water and aqueous soil extracts following the amendment of a heavily contaminated mine soil with compost and biochar (10% v:v) in a pot experiment. Speciation modelling and toxicity assays (Vibrio fischeri luminescence inhibition and Lolium perenne germination) were performed to discriminate mechanisms controlling metal mobility and assess toxicity risk thereafter. Biochar reduced free metal concentrations furthest but dissolved organic carbon primarily controlled metal mobility after compost amendment. Individually, both amendments induced considerable solubilisation of arsenic to pore water (>2500 μg l−1) related to pH and soluble phosphate but combining amendments most effectively reduced toxicity due to simultaneous reductions in extractable metals and increases in soluble nutrients (P). Thus the measure–monitor-model approach taken determined that combining the amendments was most effective at mitigating attendant toxicity risk.
KW - soil contamination
KW - organic amendments
KW - trace elements
KW - speciation
KW - pore water
U2 - 10.1016/j.envpol.2013.11.026
DO - 10.1016/j.envpol.2013.11.026
M3 - Article
VL - 186
SP - 195
EP - 202
JO - Environmental Pollution
JF - Environmental Pollution
SN - 0269-7491
ER -