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Conventional technologies for the removal/remediation of toxic metal ions from wastewaters are proving expensive due to non-regenerable materials used and high costs. Biosorption is emerging as a technique offering the use of economical alternate biological materials for the purpose. Functional groups like carboxyl, hydroxyl, sulphydryl and amido present in(More)
The leachability of heavy metals such as chromium (Cr), lead (Pb) and cadmium (Cd) from the ash material obtained from waste combustion was studied. The effects of ash surface topography and morphology on the leachability of these elements were examined using atomic force microscopy (AFM) and scanning electron microscopy (SEM). The AFM (scan size 10 x 10(More)
Decomposition of organosolve lignin in water/phenol solutions was studied in a 50 nL micro-reactor coupled with optical, Raman and infrared microscopies at temperatures up to 600 degrees C and water densities up to 1165 kg/m3. It was found that when phenol was used with {lignin+water} mixtures that a homogenous phase was formed that seemed to promote the(More)
Dr. M. Li, N. Hakimi, Dr. R. Perez, Prof. S. Waldman, Prof. D. K. Hwang Department of Chemical Engineering Ryerson University 350 Victoria Street , Toronto , Ontario M5B 2K3 , Canada E-mail: dkhwang@ryerson.ca Dr. R. Perez Department of Nanobiomedical Science Dankook University Cheonan 330–714 , South Korea Prof. S. Waldman Li Ka Shing Knowledge Institute(More)
The effects of temperature, pressure, pH, residence time and reactant concentrations, as well as the presence or absence of CO(2), on the size and morphology of erbium hydroxide particles synthesized in a hydrothermal batch reactor and a diamond-anvil cell (DAC) reactor have been investigated. Several new erbium-based microstructures and nanostructures were(More)
β-Cyclodextrin-chitosan-glutaraldehyde terpolymers were synthesized by reacting variable weight fractions of β-cyclodextrin (β-CD) and chitosan (Chi), with a constant amount of crosslinker (glutaraldehyde). The β-CD:Chi:Glu terpolymer sorbents were characterized by FT-IR spectroscopy and TGA. The solid-solution sorption isotherms in aqueous solution for the(More)
Chitosan-glutaraldehyde copolymer sorbents were synthesized by reacting variable weight ratios (low, medium, and high) of glutaraldehyde with fixed amounts of chitosan. Two commercially available chitosan polymers with low (L) and high (H) relative molecular weights were investigated. The chitosan-glutaraldehyde (Chi-Glu) copolymer sorbents are denoted as(More)
Lignocellulosic feedstocks are utilized for the production of fuel ethanol and butanol through dilute acid/enzymatic hydrolysis and fermentation. Hydrolysis residue, a major by-product of biomass hydrolysis, is rich in recalcitrant carbon as majority of cellulosic and hemicellulosic components are released during pretreatment. With the intention of their(More)
The use of lignocellulosic biomass as a renewable energy source is becoming progressively essential. Much attention is focused on identifying suitable biomass species that can provide high energy outputs to replace conventional fossil fuels. The current study emphasizes on some commonly available biomasses in North America such as pinewood, timothy grass,(More)
Apprehensions relating to global warming, climate change, pollution, rising energy demands as well as fluctuating crude oil prices and supply are leading to a shift in global interest to find suitable alternatives to fossil fuels. This review aims to highlight the many different facets of butanol as an advanced next-generation transportation biofuel.(More)