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• W97490992 abstract "Preserved wood is commonly found in solid waste. Among the different types ofpreserved wood, CCA wood has received much attention due to the scale of usage and itssignificant role in soil and water contamination after disposal. As the ash of CCA wood ishazardous, it cannot be burned, and the best available disposal method is thus landfilling.Leaching of the metals from disposed CCA wood in landfills pollutes the environment.To reduce the contamination of CCA, treatment before landfilling is required.Nowadays, ethanol is seen as a promising source of energy. Lignocellulosic materialssuch as wood are resources for ethanol production. This research focuses on thepossibility of producing ethanol from CCA wood. It suggests that production of ethanolwill not only be a solution to the disposal but will also generate a clean fuel.The results showed the existence of copper, chromium and arsenic did not have anegative effect on the fermentation, and producing ethanol from CCA wood is feasible.The copper removed by sulfuric acid completely precipitated during the hydrolysis andivneutralization. In addition about 50% of the chromium (VI) and also 60% of the arsenic(V) were removed from the leachate by yeast during fermentation.TCLP tests of the hydrolyzed wood leached less than 4 ppm of arsenic while minimalamounts of chromium and copper remained in the hydrolyzed wood which makeslandfilling of hydrolyzed wood acceptable.Baker's yeast behaves selectively by uptaking arsenic (V) and chromium (VI) but notarsenic (III) and chromium (III). There is competition between copper and chromiumsorption by yeast. The kinetic model for removal of copper and chromium is a zero ordermodel while the appropriate model for uptaking arsenic by yeast is a first order model.The kinetic models confirm that there are different mechanisms of uptaking metals byyeast, a diffusion mechanism for removal arsenic and a surface adsorption mechanism forcopper and chromium.As an overall conclusion of this study, using discarded CCA wood as the feed for ethanolproduction is a sustainable method for disposal of CCA treated wood." @default.
• W97490992 created "2016-06-24" @default.
• W97490992 creator A5046871074 @default.
• W97490992 date "2010-12-09" @default.
• W97490992 modified "2023-09-26" @default.
• W97490992 title "Development of a sustainable method for the disposal ofchromated copper arsenate (CCA) treated wood" @default.
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• W97490992 hasPublicationYear "2010" @default.
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