Identification of Priority Organic Contaminants in Sewage Sludge Volume 1 containing the main report
ISBN: 1 84057 102 0
A review of the occurrence of organic compounds in sewage sludge is presented, with literature compiled on over 300 organic compounds. Likely inputs of organic contaminants to agricultural soils via sewage sludge are determined and results compared against soil quality standards. A screening approach is developed, based on compound physicochemical properties, to assess the likely behaviour and fate of chemicals introduced into agricultural soils in sewage sludge. The propensity for compounds to leach to groundwater or transfer to crop plants and grazing animals is assessed. The sludge- soil/ herbage- livestock' pathway is the most important with regard to potential human exposure of sludge- derived organics. Routine operational practice for the application of sewage sludge to land is very unlikely to result in UK soil quality limits for trace organics being exceeded. Repeated applications of sludge to pasture land may lead to the exceedence of the more stringent soil quality guidelines adopted elsewhere
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