Chicken-manure-derived biochar reduced bioavailability of copper in a contaminated soil

1 marzo, 2017 -

• Sin categoría

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Meier, Sebastian(a)(b); Curaqueo, Gustavo(b); Khan, Naser(c ) (d); Bolan, Nanthi (c ) (e); Cea, Mara © ; Maria Eugenia, Gonzalez(f); Cornejo, Pablo(a); Ok, Yong Sik (g); Borie, Fernando (a)

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(a) Departamento de Ciencias Químicas y Recursos Naturales, Universidad de La Frontera, P.O. Box 54-D, Temuco, Chile (b) Scientifical and Technological Bioresource Nucleus, BIOREN-UFRO, Universidad de La Frontera, P.O. Box 54-D, Temuco, Chile © Centre for Environmental Risk Assessment and Remediation (CERAR), University of South Australia, Building X, University Blvd, Mawson Lakes, SA 5095, Australia (d) School of Natural and Built Environments, University of South Australia, Building P, Materials Lane, Mawson Lakes, SA 5095, Australia (e) Global Institute for Environmental Remediation (GIER), The University of Newcastle, ATC Building, University Drive, Callaghan, NSW 2308, Australia (f) Núcleo de Investigación en Energías Renovables, Dirección de Investigación, Universidad Católica de Temuco, Temuco, Chile (g) Korea Biochar Research Center & Department of Biological Environment, Kangwon National University, Chuncheon, 200-701, South Korea

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JOURNAL OF SOILS AND SEDIMENTS

Volumen: 17(3)   Páginas: 741-750

DOI: https://doi.org/10.1007/s11368-015-1256-6

Fecha de publicación: 01 de Marzo de 2017

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Abstract

Purpose: Copper (Cu) contamination has been increasing in land ecosystems due to economic development activities. Excessive amount of Cu in soils is toxic to both plants and microorganisms. Biochar (BC) is known to immobilize soil Cu. The objectives of this research were to investigate the effects of chicken-manure-derived BC (CMB) on Cu immobilization, and growth of native metallophyte Oenothera picensis in a Cu-contaminated soil. Materials and methods: A Cu-contaminated sandy soil (338 mg Cu kg−1) was spiked and equilibrated with additional Cu (0, 100, and 500 mg Cu kg−1). The spiked soil was then amended with CMB (0, 5, and 10 % w/w) and incubated for 2 weeks. The metallophyte was grown on these treatments under greenhouse conditions for 3 months. Pore water solutions were collected from the plant pots every 30 days. After the harvest, soil and pore water pH, soil Cu fractions, pore water Cu concentration, soil microbial activity, plant biomass weight, and Cu concentration in plant parts were determined. Results and discussion: The CMB increased the pH of soils and soil pore water, and probably also soil major nutrients. It reduced the exchangeable fraction of Cu but increased its organic matter and residual fractions. At the same time, it decreased the Cu