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LSU

Microwave-Assisted Organic Acids Extraction of Chromated Copper Arsenate (CCA)-Treated Southern Pine

2018-11-15

Microwave-Assisted Organic Acids Extraction of Chromated Copper Arsenate (CCA)-Treated Southern Pine The extraction effects of acid concentration, reaction time and temperature in a microwave reactor on recovery of CCA-treated wood were evaluated. Extraction of copper, chromium, and arsenic metals from chromated copper arsenate (CCA)-treated southern pine wood samples with two different organic acids (i.e., acetic … [Read more…]

Posted in: Blog Tagged: CCA-treated wood, extraction, Louisiana State University, LSU, microwave, organic acid, Todd Shupe

Fractionation of heavy metals in liquefied chromated copper arsenate (CCA)-treated wood sludge using a modified BCR-sequential extraction procedure

2018-11-01

Fractionation of heavy metals in liquefied chromated copper arsenate (CCA)-treated wood sludge using a modified BCR-sequential extraction procedure Chromated copper arsenate (CCA)-treated wood was liquefied with polyethylene glycol/glycerin and sulfuric acid. After liquefaction, most CCA metals (98% As, 92% Cr, and 83% Cu) were removed from liquefied CCA-treated wood by precipitation with calcium hydroxide. The … [Read more…]

Posted in: Blog Tagged: CCA-treated wood sludge, fractionation, liquefaction, Louisiana State University, LSU, Todd Shupe

New Approach to Remove Metals from Chromated Copper Arsenate (CCA)-Treated Wood

2018-10-01

New Approach to Remove Metals from Chromated Copper Arsenate (CCA)-Treated Wood Recovery of metals from chromated copper arsenate (CCA)-treated southern pine wood particles was investigated using binary acid solutions consisting of acetic, oxalic, and phosphoric acids in a microwave reactor. Formation of an insoluble copper oxalate complex in the binary solution containing oxalic acid was … [Read more…]

Posted in: Blog Tagged: CCA-treated wood; microwave extraction, Louisiana State University, LSU, Todd Shupe

Study of Moso Bamboo’s Permeability and Mechanical Properties

2018-05-15

Study of Moso Bamboo’s Permeability and Mechanical Properties Microwave Treatment of Bamboo In this article, moso bamboo blocks were first treated with hydrochloric acid solvents with different concentrations or microwave treatments with various microwave output power and treatment durations. The results showed that the crystalliferous region of cellulose of moso bamboo blocks formed porous or … [Read more…]

Posted in: Blog Tagged: bamboo, bamboo permeability, bamboo strength, Louisiana State University, LSU, Todd Shupe

Characterization of Microwave Liquefied Bamboo Residue

2018-05-12

Characterization of Microwave Liquefied Bamboo Residue Microwave Liquefaction System Bamboo raw feedstocks with large particle size (20−80 mesh) were subjected to a microwave liquefaction system, and the liquefied products were separated into biopolyols and liquefied residues. Biopolyols were first analyzed by gas chromatography mass spectrometry (GC−MS), and the main components were sugar derivatives with 2−4 … [Read more…]

Posted in: Blog Tagged: bamboo, Characterization, Louisiana State University, LSU, microwafe liquefaction, Nanofibrillated cellulosis fiber, residue, Todd Shupe

Characterization of Microwave Liquefied Bamboo Residue

2018-05-12

Characterization of Microwave Liquefied Bamboo Residue Microwave Liquefaction System Biomass is widely considered as an important feedstock because of its renewability, ease of degradation, and availability. According to Perlack and Stokes, the current biomass resource availability annually was about 1.37 × 109 dry tons from forestlands and croplands.1 Recently, utilization of biomass for bioenergy or … [Read more…]

Posted in: Blog Tagged: bamboo, Characterization, Louisiana State University, LSU, Microwave liquefaction, Nanofibrillated cellulosic fiber, residue, Todd Shupe

Antifungal Activities of Three Supercritical Fluid Extracted Cedar Oils

2018-05-01

Market Potential for Reclaiming CCA from Decommissioned Utility Poles Port-Orford cedar (Chamaecyparis lawsoniana), Alaska yellow cedar (Chamaecyparis nootkatensis), and Eastern red cedar (Juniperus virginiana) were submitted to supercritical fluid extraction with CO2 (SCC) and Soxhlet extracted (SE) with hexane. The components in the extracted oils were identified by GC-MS. The oils were evaluated against two … [Read more…]

Posted in: Blog Tagged: cedar, cedar oil, Louisiana State University, LSU, super critical fluid extraction, Todd Shupe, wood decay

Market Potential for Reclaiming CCA from Decommissioned Utility Poles

2018-04-15

Market Potential for Reclaiming CCA from Decommissioned Utility Poles Green Spray Foam In the area of recycling of spent chromated copper arsenate (CCA)-treated wood, most studies to date have focused on methods of removing/extracting the residual preservative from the wood matrix. It is well recognized that exposure of CCA-treated wood to an acid solution can … [Read more…]

Posted in: Blog Tagged: CCA, green insulation, liquefaction, Louisiana State University, LSU, marketing, Todd Shupe

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