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| Content Provider | World Health Organization (WHO)-Global Index Medicus |
|---|---|
| Author | Harbottle, M. J. Hutchings, T. R. Page, K. Cleall, P. J. |
| Description | Author Affiliation: Page K ( Cardiff University, School of Engineering, Queens Building, The Parade, Cardiff, CF24 3AA, United Kingdom. Electronic address: pageke@cardiff.ac.uk.); Harbottle MJ ( Cardiff University, School of Engineering, Queens Building, The Parade, Cardiff, CF24 3AA, United Kingdom. Electronic address: harbottlem@cardiff.ac.uk.); Cleall PJ ( Cardiff University, School of Engineering, Queens Building, The Parade, Cardiff, CF24 3AA, United Kingdom. Electronic address: cleall@cardiff.ac.uk.); Hutchings TR ( Forest Research, Alice Holt Lodge, Farnham, Surrey, GU10 4LH, United Kingdom. Electronic address: Tony.hutchings@forestry.gsi.gov.uk.) |
| Abstract | Conversion of productive agricultural land towards growth of energy crops has become increasingly controversial. Closed landfill sites represent significant areas of brownfield land, which have potential for the establishment of energy crops. Increasingly composts are now being produced from the degradable fraction of mixed municipal solid waste (MSW) and are commonly referred to as Compost-Like-Output (CLO). However, leaching of heavy metal and other elements due to the use of CLO as soil amendment has the potential to pose a risk to the wider environment as a diffuse pollution source if not managed correctly. Salix viminalis and Eucalyptus nitens were grown at 5 different CLO application rates (equivalent to 250, 1000, 3000, 6000, 1,0000 kg N/Ha) with weekly leachate analysis to assess the solubility of heavy metals and the potential release into the environment. The change in plant total dry mass suggested 3,000 kgN/Ha as the optimum application rate for both species. Weekly leachate analysis identified excess soluble ions within the first 4 weeks, with heavy metals concentrations exceeding water quality limits at the higher application rates (>3,000 kg N/Ha). Heavy metal uptake and accumulation within each species was also investigated; S. viminalis accumulated greater levels of heavy metals than E. nitens with a general trend of metal accumulation in root>stem>leaf material. Heavy metal leaching from soils amended with CLO has the potential to occur at neutral and slightly alkaline pH levels as a result of the high buffering capacity of CLO. The use of CLO at application rates of greater than 250 kg N/Ha may be limited to sites with leachate collection and containment systems, not solely for the heavy metal leaching but also excess nitrogen leaching. Alternatively lower application rates are required but will also limit biomass production. |
| ISSN | 00489697 |
| Volume Number | 487 |
| e-ISSN | 18791026 |
| Journal | Science of The Total Environment |
| Language | English |
| Publisher | Elsevier |
| Publisher Date | 2014-07-15 |
| Publisher Place | Netherlands |
| Access Restriction | One Nation One Subscription (ONOS) |
| Subject Keyword | Agriculture Fertilizers Metals, Heavy Analysis Refuse Disposal Methods Soil Pollutants Soil Chemistry Journal Article Research Support, Non-u.s. Gov't Discipline Environmental Science |
| Content Type | Text |
| Resource Type | Article |
| Subject | Environmental Chemistry Waste Management and Disposal Pollution Environmental Engineering |
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