Journal
CHEMICAL ENGINEERING RESEARCH & DESIGN
Volume 92, Issue 9, Pages 1781-1791Publisher
ELSEVIER
DOI: 10.1016/j.cherd.2013.12.013
Keywords
Adsorbent; Autohydrolysis; Lignocellulosic; Oil spill; Simulation; Wheat straw
Categories
Funding
- European Union (European Social Fund - ESF)
- Greek national funds through the Operational Program Education and Lifelong Learning of the National Strategic Reference Framework (NSRF) [MIS 377356]
- University of Minnesota
- Research Funding Program: Thalis-University Of Piraeus-Development Of New Material From Waste Biomass For Hydrocarbons Adsorption In Aquatic Environments
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This work deals with the use of chemically modified wheat straw as efficient low-cost adsorbent for combating oil-spills in aquatic environment. The autohydrolyzed wheat straw was produced from the corresponding raw material by autohydrolysis in a PARR batch reactor (autoclave) at 160-240 degrees C for 0-50 min isothermal reaction time (following a non-isothermal preheating period). Oil adsorbency tests were performed, using diesel and crude oil spills in freshwater and seawater. Diesel and crude oil adsorbency values were found to increase up to a maximum by intensifying the autohydrolysis conditions, i.e., time and temperature. The adsorbency values were estimated by a proposed novel model incorporating the autohydrolysis severity factor R-0. Optimal modification conditions were found for log R-0 =5.15 (i.e., 200 degrees C, 10 min isothermal time period) giving diesel adsorbency up to 6.65 g g(-1) and crude oil adsorbency up to 6.91 g g(-1). The maximum adsorbency values were comparable to those of the commonly used commercial adsorbents. (C) 2013 The Institution of Chemical Engineers. Published by Elsevier B.V. All rights reserved.
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