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Heavy metal content of recycled organic wastes and potential bioaccumulation in short rotation coppice when used as a nutrient source

Page, Katherine, Cleall, Peter John, Harbottle, Michael John and Hutchings, T. 2012. Heavy metal content of recycled organic wastes and potential bioaccumulation in short rotation coppice when used as a nutrient source. Presented at: ISWA World Solid Waste Congress, Florence, Italy, 17-19 September 2012.

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Abstract

This paper investigates both the heavy metal content of three Recycled Organic Wastes (ROWs) and metal accumulation in two Short Rotation Coppice (SRC) energy crops grown in ROWs. In particular Salix viminalis and Eucalyptus nitens were grown in Compost-Like Output (CLO), PAS 100 compost and PAS 110 at concentrations equivalent to 3000kg N/ha. The heavy metal content of each ROW was investigated and growth trials used to assess potential movement and uptake of heavy metals from the compost to SRC species. The individual ROW mixes were separated from the plant material and the latter was divided into stem, leaves and root materials and all material analysed using an X-ray Fluorescence machine (XRF). Initial characterisation of the ROW materials identified higher heavy metal concentrations in CLO compared to PAS 100 and PAS 110 and electrical conductivity levels of over 2.0 mS/cm in both the CLO and PAS 100. Trees grown in CLO and PAS 100 had negative height changes as a result of heavy metal concentration and electrical conductivity levels. There were positive height changes in the PAS 110 and control plants that had low electrical conductivity and heavy metal concentrations. Plant material analysis identified heavy metal concentration of the plant material and were in the order of; root > leaves > stems. Zinc was translocated to stems in both species although heavy metal uptake was greater in S. viminalis compared to E. nitens.

Item Type: Conference or Workshop Item (Paper)
Date Type: Completion
Status: Unpublished
Schools: Engineering
Subjects: T Technology > T Technology (General)
T Technology > TD Environmental technology. Sanitary engineering
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Last Modified: 04 Jun 2017 04:24
URI: http://orca.cf.ac.uk/id/eprint/38493

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