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Emissions of inorganic and organic arsenic compounds via the leachate pathway from pretreated municipal waste materials: a landfill reactor study

Title data

Huang, Jen-How ; Ilgen, Gunter ; Vogel, D. ; Michalzik, Beate ; Hantsch, S. ; Tennhardt, L. ; Bilitewski, B.:
Emissions of inorganic and organic arsenic compounds via the leachate pathway from pretreated municipal waste materials: a landfill reactor study.
In: Environmental Science & Technology. Vol. 43 (2009) Issue 18 . - pp. 7092-7097.
ISSN 0013-936X
DOI: https://doi.org/10.1021/es901605q

Abstract in another language

The emission of arsenic (As) with leachate from mechanically biologically pretreated municipal solid waste (MBP-MSW) was quantified over one year using landfill simulation reactors. Arsenic mobilization and transformation processes were studied by simulating different environmental conditions (anoxic conditions with underlying soil or oxic/anoxic conditions). Amounts of mono-, di-, and trimethylated As in MBP-MSW prior to simulation were <48 mu g As kg(-1) and were magnified to 300-390 mu g As kg(-1) under anoxic conditions, whereas methylated As was undetectable in the oxic setup. The highest leachate concentrations (up to 84 mu g L-1) occurred during the first four weeks of manipulation. The annual As-total, release with leachates averaged 19.6, 7.6, and 4.5 mu g kg(-1) under an anoxic environment with underlying soil, oxic conditions, and anoxic conditions, respectively, with 15-50% occurring as organic As. The annually released As represented 0.2-0.8% of the As-total pool, suggesting that As mobilization from waste is a slow process. The anoxia diminished As release rates, whereas anoxic conditions with underlying soil material elevated the As mobilization, probably due to reductive dissolution of soil-derived Fe and Mn (hydr)oxides. The mass balance of methylated As in MBP-MSW and leachates before and after the treatments highlights As methylation under anoxic conditions and demethylation under oxic landfill conditions.

Further data

Item Type: Article in a journal
Refereed: Yes
Additional notes: BAYCEER80663
Institutions of the University: Research Institutions > Research Centres > Bayreuth Center of Ecology and Environmental Research- BayCEER
Research Institutions
Research Institutions > Research Centres
Result of work at the UBT: Yes
DDC Subjects: 500 Science
Date Deposited: 07 Aug 2015 06:59
Last Modified: 27 Jun 2016 07:15
URI: https://eref.uni-bayreuth.de/id/eprint/17731