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Phosphorus and cadmium availability in soil fertilized with biosolids and ashes
Luleå University of Technology, Department of Civil, Environmental and Natural Resources Engineering, Geosciences and Environmental Engineering.ORCID iD: 0000-0002-1442-1573
Luleå University of Technology, Department of Civil, Environmental and Natural Resources Engineering, Geosciences and Environmental Engineering.ORCID iD: 0000-0002-8843-043X
Luleå University of Technology, Department of Civil, Environmental and Natural Resources Engineering, Geosciences and Environmental Engineering.
Luleå University of Technology, Department of Engineering Sciences and Mathematics, Energy Science.ORCID iD: 0000-0002-5777-9241
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Number of Authors: 62016 (English)In: Chemosphere, ISSN 0045-6535, E-ISSN 1879-1298, Vol. 151, p. 124-132Article in journal (Refereed) Published
Abstract [en]

The recycling of hygienized municipal sewage sludge (biosolids) to soil as the source of phosphorus (P) is generally encouraged. The use of biosolids, however, has some concerns, such as the presence of elevated concentrations of potentially toxic trace elements, and the possible presence of pathogens, hormones and antibiotics. Organic substances are destroyed during combustion whereas trace elements could partly be separated from P in different ash fractions. Biomass combustion waste (ash) can instead be considered as an alternative P source. This study evaluates and compares the impact of biosolids and their combustion residues (ashes), when used as fertilizers, on P and Cd solubility in soil, plant growth and plant uptake of these elements. Biosolids were also amended with K and Ca to improve the composition and properties of P in ashes, and incinerated at either 800 °C or 950 °C. Combustion of biosolids improved the Cd/P ratio in ashes by 2-5 times, compared with the initial biosolids. The low Cd content in ashes (4-9 mg Cd (kg P)-1) makes this material a particularly attractive alternative to mineral fertilizers. Significantly higher pore water P (as well as total N) was measured in soils containing biosolids, but plants produced a higher biomass in soil fertilized with ashes. The K and Ca amendments prior to biosolids combustion generally decreased the total Cd in ash, but had little effect on P and Cd uptake and biomass growth. Similarly, the combustion temperature had negligible effect on these factors as well

Place, publisher, year, edition, pages
2016. Vol. 151, p. 124-132
National Category
Other Environmental Engineering Energy Engineering
Research subject
Waste Science and Technology; Energy Engineering
Identifiers
URN: urn:nbn:se:ltu:diva-9570DOI: 10.1016/j.chemosphere.2016.02.069ISI: 000374071000016PubMedID: 26933903Scopus ID: 2-s2.0-84959221559Local ID: 8383e6a4-cd0f-4090-bd47-01caffdd123eOAI: oai:DiVA.org:ltu-9570DiVA, id: diva2:982508
Note

Validerad; 2016; Nivå 2; 20160307 (andbra)

Available from: 2016-09-29 Created: 2016-09-29 Last updated: 2018-07-10Bibliographically approved

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Kumpiene, JurateBrännvall, EvelinaSkoglund, Nils

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