摘要:

IntroductionLarge amounts of agricultural, industrial and municipal wastes are produced daily by human activities.1–5 In 1980, France's annual waste production reached about 5.5 million dry tonnes (m.d.t.) of municipal waste, 1.8 m.d.t. of urban and industrial sewage sludge, 78 m.d.t. from the agriculture and agro-industry, and 6.75 m.d.t. from forestry.6Disposal of organic wastes onto agricultural and forestry lands has several potential benefits such as long-term fertilisation, improving soil water-holding capacity and improvement of aggregate stability. However, land-based waste disposal must be carefully controlled because of potential hazards associated with application of wastes, include pathogens, heavy metals and toxic organic by-products, as reviewed by Wilsonet al.2So far, the long-term changes of soil properties induced by organic waste disposalsuch as paper sludge are not well understood, notably due to the lack of analytical approaches to follow the fate of waste matter into the soil profile. Nonetheless, several recent reports show that stable carbon isotopes can be used to study environmental issues.7–9More specifically, since the main biochemical components of plants are isotopically distinguished,e.g.cellulose being13C-enrichedversuslignin and lipids,10–12we hypothesised that paper sludge might have a distinctδ13C ratio which could be used to study their long-term fate in soils. Moreover, since paper sludges contain carbonates, which are13C-enriched, it could be feasible to isotopically distinguish soil carbon from sludge carbon. Here, we wish to report an isotopic investigation of crop and forest soils treated with paper sludge in 1992.

ISSN:1467-4866    

DOI:10.1039/b205560k

出版商:RSC    

年代:2002

数据来源: RSC