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Levels and patterns of polycyclic aromatic hydrocarbons in incineration ashes
Örebro universitet, Institutionen för naturvetenskap.
Örebro universitet, Institutionen för naturvetenskap.ORCID-id: 0000-0001-6217-8857
2003 (Engelska)Ingår i: Science of the Total Environment, ISSN 0048-9697, E-ISSN 1879-1026, Vol. 311, nr 1-3, s. 221-231Artikel i tidskrift (Refereegranskat) Published
Abstract [en]

Polycyclic aromatic hydrocarbons were analysed in weathered bottom ash from municipal solid waste incineration, fly ash from a mixed heating plant and an ash mixture from different kinds of biofuels. Although of different origin and age, all three ashes are evaluated in different small-scale fill applications. The ultimate goal is the usage of these ashes on a larger scale. The samples were Soxhlet extracted and analysed using GC/MS in the full scan mode. The sum of the 16 US EPA PAHs was found to vary from 140 mug/kg up to more than 77 000 mug/kg. Total amounts of PAHs were similar in bottom ash and in fly ash. The concentration in the mixed biofuel ash was more than 10 times higher, and exceeded the generic guidelines for PAHs in soil set by the Swedish Environmental Protection Agency. The patterns of the individual PAHs normalised to the total concentration of PAHs were found to be very similar for all the three ashes. Naphthalene and phenanthrene were the dominating PAHs for all ash samples, but the mixed biofuel ash also contained high levels of fluoranthene and pyrene. (C) 2003 Elsevier Science B.V. All rights reserved.

Ort, förlag, år, upplaga, sidor
2003. Vol. 311, nr 1-3, s. 221-231
Nyckelord [en]
PAH, bottom ash, fly ash, sleeper, road filling, biofuel, paper-mill
Nationell ämneskategori
Kemi
Forskningsämne
Kemi
Identifikatorer
URN: urn:nbn:se:oru:diva-15896DOI: 10.1016/S0048-9697(03)00168-2ISI: 000184091300016OAI: oai:DiVA.org:oru-15896DiVA, id: diva2:422810
Tillgänglig från: 2011-06-14 Skapad: 2011-06-14 Senast uppdaterad: 2017-12-11Bibliografiskt granskad
Ingår i avhandling
1. Characterisation of organic materials from incineration residues
Öppna denna publikation i ny flik eller fönster >>Characterisation of organic materials from incineration residues
2003 (Engelska)Doktorsavhandling, sammanläggning (Övrigt vetenskapligt)
Abstract [en]

The organic material present in incineration residues has been examined. Water leachable organic material was characterised and classified into hydrophilic and hydrophobic acids, neutrals and bases. Changes of the organic material during weathering were followed. Levels of polycyclic aromatic hydrocarbons in residues from the incineration of municipal solid waste and biofuel in a heating-plant, as well as in a biofuel and papermill ash mixture were determined.

The total amount of organic material was higher in fresh bottom ash than in aged ash after open-air storage. Concentrations of organic carbon in the aqueous extracts were similar, resulting in increasing percentage of leachable organic carbon in course of time. The largest fractions of organic carbon in aqueous extracts from fresh municipal solid waste incineration ash were classified as hydrophilic neutrals and bases. During weathering, the composition of water leachable organic carbon changed. In aqueous leachates from a four-year-old ash deposit, some 5070% of leachable organic carbon was classified as organic acids.

Levels of PAHs in the ashes varied widely. In MSWI bottom ash and heating-plant fly ash the levels of PAHs were low, but the mixed biofuel and papermill ash contained PAH levels exceeding the Swedish generic guidelines for PAHs in soil. The amount of carcinogenic PAHs in weathered MSWI bottom ash was, in some cases, found to exceed the Swedish generic guidelines for sensitive land use. However, the results imply that the amount of PAHs in fresh and weathered bottom ash are similar, indicating that the PAHs are strongly bound to the ash and not released to the environment after deposition on e.g. an open-air landfill. In heating-plant fly ash, the levels of carcinogenic PAHs were related to the amount of sleepers in the fuel. The distributions of PAHs were similar in all ashes and were dominated by low molecular weight PAHs such as naphthalene and phenanthrene.

Ort, förlag, år, upplaga, sidor
Örebro: Örebro universitetsbibliotek, 2003. s. 48
Serie
Örebro Studies in Chemistry, ISSN 1651-4270 ; 3
Nyckelord
ash, biofuel, waste, residues, MSWI, incineration, leaching, organic carbon, organic acids, polycyclic aromatic hydrocarbons, PAH
Nationell ämneskategori
Kemi
Forskningsämne
Kemi
Identifikatorer
urn:nbn:se:oru:diva-44 (URN)91-7668-335-4 (ISBN)
Disputation
2003-04-11, Hörsal Bio, Örebro universitet, Örebro, 09:30
Opponent
Tillgänglig från: 2003-04-11 Skapad: 2003-04-11 Senast uppdaterad: 2017-10-18Bibliografiskt granskad

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Johansson, Ingervan Bavel, Bert

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