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Application of co-composted biochar significantly improved plant-growth relevant physical/chemical properties of a metal contaminated soil

M. Teodoro, L. Trakal, BN. Gallagher, P. Šimek, P. Soudek, M. Pohořelý, L. Beesley, L. Jačka, M. Kovář, S. Seyedsadr, D. Mohan,

. 2020 ; 242 (-) : 125255. [pub] 20191101

Language English Country Great Britain

Document type Journal Article

Persistent link   https://www.medvik.cz/link/bmc20005595

A woody-biochar was added to waste biomass during a composting process. The resulting compost-char was amended to a metal contaminated soil and two plant species, L. perenne and E. sativa, were grown in a pot experiment to determine 1) plant survival and stress factors, 2) uptake of metals to plants and, 3) chemical characteristics of sampled soils and pore waters. Compost supplemented with biochar after the composting process were also tested, as well as a commercially available compost, for comparison. Co-composting with biochar hastened the composting process, resulting in a composite material of reduced odour, increased maturity, circum-neutral pH and increased moisture retention than compost (increase by 3% of easily removable water content). When amended to the soil, CaCl2 extractable and pore water metals s were reduced by all compost treatments with little influence of biochar addition at any tested dose. Plant growth success was promoted furthest by the addition of co-composted biochar to the test soil, especially in the case of E. sativa. For both tested plant species significant reductions in plant metal concentrations (e.g. 8-times for Zn) were achieved, against the control soil, by compost, regardless of biochar addition. The results of this study demonstrate that the addition of biochar into the composting process can hasten the stability of the resulting compost-char, with more favourable characteristics as a soil amendment/improver than compost alone. This appears achievable whilst also maintaining the provision of available nutrients to soils and the reduction of metal mobility, and improved conditions for plant establishment.

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$a Teodoro, Manuel $u Department of Environmental Geosciences, Faculty of Environmental Sciences, Czech University of Life Sciences Prague, Kamýcká 129, 165 00, Praha, Suchdol, Czech Republic.
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$a Application of co-composted biochar significantly improved plant-growth relevant physical/chemical properties of a metal contaminated soil / $c M. Teodoro, L. Trakal, BN. Gallagher, P. Šimek, P. Soudek, M. Pohořelý, L. Beesley, L. Jačka, M. Kovář, S. Seyedsadr, D. Mohan,
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$a A woody-biochar was added to waste biomass during a composting process. The resulting compost-char was amended to a metal contaminated soil and two plant species, L. perenne and E. sativa, were grown in a pot experiment to determine 1) plant survival and stress factors, 2) uptake of metals to plants and, 3) chemical characteristics of sampled soils and pore waters. Compost supplemented with biochar after the composting process were also tested, as well as a commercially available compost, for comparison. Co-composting with biochar hastened the composting process, resulting in a composite material of reduced odour, increased maturity, circum-neutral pH and increased moisture retention than compost (increase by 3% of easily removable water content). When amended to the soil, CaCl2 extractable and pore water metals s were reduced by all compost treatments with little influence of biochar addition at any tested dose. Plant growth success was promoted furthest by the addition of co-composted biochar to the test soil, especially in the case of E. sativa. For both tested plant species significant reductions in plant metal concentrations (e.g. 8-times for Zn) were achieved, against the control soil, by compost, regardless of biochar addition. The results of this study demonstrate that the addition of biochar into the composting process can hasten the stability of the resulting compost-char, with more favourable characteristics as a soil amendment/improver than compost alone. This appears achievable whilst also maintaining the provision of available nutrients to soils and the reduction of metal mobility, and improved conditions for plant establishment.
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$a Trakal, Lukáš $u Department of Environmental Geosciences, Faculty of Environmental Sciences, Czech University of Life Sciences Prague, Kamýcká 129, 165 00, Praha, Suchdol, Czech Republic. Electronic address: trakal@fzp.czu.cz.
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$a Gallagher, Brett N $u Department of Environmental Geosciences, Faculty of Environmental Sciences, Czech University of Life Sciences Prague, Kamýcká 129, 165 00, Praha, Suchdol, Czech Republic.
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$a Šimek, Pavel $u Department of Environmental Geosciences, Faculty of Environmental Sciences, Czech University of Life Sciences Prague, Kamýcká 129, 165 00, Praha, Suchdol, Czech Republic.
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$a Soudek, Petr $u Laboratory of Plant Biotechnologies, Institute of Experimental Botany AS CR, v. v. i., Rozvojová 263, 165 02, Prague 6, Lysolaje, Czech Republic.
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$a Pohořelý, Micheal $u Environmental Process Engineering Laboratory, Institute of Chemical Process Fundamentals, Academy of Sciences of Czech Republic, v. v. i., Rozvojová 135, Praha 6, Suchdol, 165 02, Czech Republic; Department of Power Engineering, University of Chemistry and Technology, Prague, Technická 5, 166 28, Praha 6, Czech Republic.
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$a Beesley, Luke $u The James Hutton Institute, Craigiebuckler, Aberdeen, AB15 8QH, UK.
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$a Jačka, Lukáš $u Department of Water Resources and Environmental Modeling, Faculty of Environmental Sciences, Czech University of Life Sciences Prague, Kamýcká 129, Praha 6, Suchdol, 165 00, Czech Republic.
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$a Kovář, Martin $u Department of Water Resources and Environmental Modeling, Faculty of Environmental Sciences, Czech University of Life Sciences Prague, Kamýcká 129, Praha 6, Suchdol, 165 00, Czech Republic.
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$a Seyedsadr, Samar $u Department of Environmental Geosciences, Faculty of Environmental Sciences, Czech University of Life Sciences Prague, Kamýcká 129, 165 00, Praha, Suchdol, Czech Republic.
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$a Mohan, Dinesh $u School of Environmental Sciences, Jawaharlal Nehru University, New Delhi, 110067, India.
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