Phytoremediating a copper mine soil with Brassica juncea L., compost and biochar
- 1.5k Downloads
The soils at a depleted copper mine in Touro (Galicia, Spain) are chemically degraded. In order to determine the effect of amendments and vegetation on the chemical characteristics of a mine soil and on the plant uptake of metals, a greenhouse experiment was carried out for 3 months. A settling pond soil was amended with different percentages of a compost and biochar mixture and vegetated with Brassica juncea L. The results showed that the untreated settling pond soil was polluted by Cu. Amendments and planting mustards decreased the pseudototal concentration of this metal, reduced the extreme soil acidity and increased the soil concentrations of C and TN. Both treatments also decreased the CaCl2-extractable Co, Cu and Ni concentrations. However, the amendments increased the pseudototal concentration of Zn in the soil, provided by the compost that was used. The results also showed that mustards extracted Ni efficiently from soils, suggesting that B. juncea L. is a good phytoextractor of Ni in mine soils.
KeywordsSettling pond Phytoremediation Metals Compost Biochar Brassica juncea
This study was supported by the Spanish Ministry of Education and Science through project CGL2009-07843 and by the University of Vigo through a pre-doctoral fellowship awarded to V. Asensio.
- Blackwell P, Reithmuller G, Collins M (2009) Biochar application to soil. In: Lehmann J, Joseph S (eds) Biochar Environ Manag Sci Technol. Earthscan, London, pp 207-226Google Scholar
- Conesa HM, Faz Á, García G, Arnaldos R (2007b) Heavy metal contamination in the semiarid area of Cartagena-La Unión (SE Spain) and its implications for revegetation. Fresenius Environ Bull 16:1076–1081Google Scholar
- Hemmat A, Aghilinategh N, Rezainejad Y, Sadeghi M (2010) Long-term impacts of municipal solid waste compost, sewage sludge and farmyard manure application on organic carbon, bulk density and consistency limits of a calcareous soil in central Iran. Soil Tillage Res 108:43–50. doi: 10.1016/j.still.2010.03.007 CrossRefGoogle Scholar
- Lehmann J, Joseph S (2009) Biochar for environmental management: an introduction. In: Lehmann J, Joseph S (eds) Biochar Environ. Manag. Sci. Technol. Earthscan, London, pp 1–12Google Scholar
- Macías F, Calvo de Anta R (2009) Niveles genéricos de referencia de metales pesados y otros elementos traza en los suelos de Galicia. Xunta de Galicia, SpainGoogle Scholar
- Porta J (1986) Técnicas y experimentos en Edafología. Collegi Oficial D’Enginyers Agronoms de Catalunya, BarcelonaGoogle Scholar
- Singh SK, Ramprakash, Kumari S, Duhan BS (2013) Phytoextraction of Ni from contaminated soil by Brassica juncea as influenced by chelating agents. Ann Biol 29:15–18Google Scholar
- Sohi SP, Krull E, Lopez-Capel E, Bol R (2010) A review of biochar and its use and function in soil. Adv Agron 105:47–82. doi: 10.1016/S0065-2113(10)05002-9
- USDA Natural Resources Conservation Service (USDA-NRCS) (1998) Soil quality indicators: pH. Soil quality information sheetGoogle Scholar
- Yin Chan K, Xu Z (2009) Biochar: nutrient properties and their enhancement. In: Lehmann J, Joseph S (eds) Biochar Environ Manag Sci Technol. Earthscan, London, pp 67-84Google Scholar