Journal
JOURNAL OF ANALYTICAL AND APPLIED PYROLYSIS
Volume 80, Issue 2, Pages 496-501Publisher
ELSEVIER
DOI: 10.1016/j.jaap.2007.03.009
Keywords
sewage sludge; pyrolysis; metals; fulvic acids; humic acids
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One sewage sludge (SLA) from Avila region (Spain) was selected and used as raw material in order to study the influence of acid treatment on the pyrolysis behavior of sewage sludges. SLA was heat treated with acid solutions at pH 1 and pH 2 leading to SLA-1 and SLA-2, respectively. Characterization of samples has showed that acid treatment leads to metals removal and modifications in the organic matter composition of sewage sludge. Pyrolysis of three samples showed that SLA and SLA-1 have a similar pyrolysis behavior whereas SLA-2 shows a slightly extended temperature interval for pyrolysis, beginning at lower temperature and finishing at higher temperatures. (c) 2007 Elsevier B.V. All rights reserved.
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