2 edition of extraction of pentachlorophenol from pressure treated wood using supercritical carbon dioxide found in the catalog.
extraction of pentachlorophenol from pressure treated wood using supercritical carbon dioxide
Written in English
|Statement||by Jung-Seok Yi.|
|The Physical Object|
|Pagination||77 leaves, bound. :|
|Number of Pages||77|
conditioned were treated with pentachlorophenol in one of the seven different heavy oil hydrocarbon solvents shown in Table 1. Stubs were treated using an initial air pressure of kPa ( psig) followed by a pressure period of kPa ( psig) for hours. Solution temperatures ranged from ° C (° F). A final vacuum at -. Carbon dioxide (chemical formula CO 2) is a colorless gas with a density about 60% higher than that of dry air. Carbon dioxide consists of a carbon atom covalently double bonded to two oxygen atoms. It occurs naturally in Earth's atmosphere as a trace current concentration is about % ( ppm) by volume, having risen from pre-industrial levels of ppm.E number: E (preservatives).
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The Extraction of Pentachlorophenol from Pressure Treated Wood Using Supercritiical Carbon Dioxide AN ABSTRACT OF THE THESIS OF Tung-Seok Yi for the degree of Master of Science in Chemical Engineering presented on Novem The extraction of pentachlorophenol (PCP) from pressure treated wood wafers with supercritical carbon dioxide has been studied.
Experimental data were obtained for the effects of pressure ( - MPa), temperature ( - K), flow rate (1 - 3 ml/min at supercritical conditions), and sample size ( x 10 x 50 mm and x 10 x 50 mm) by measuring the effluent concentration versus : Jung-Seok Yi. Graduation date: The extraction of pentachlorophenol (PCP) from pressure treated wood\ud wafers with supercritical carbon dioxide has been studied.
Supercritical Fluid Extraction of Pentachlorophenol from Pressure-Treated Wood. Separation Science and Technology32 (6), DOI: /Cited by: PCP was extracted from leather with supercritical carbon dioxide and in situ derivatized with acetic anhydride in the presence of a base (e.g., triethylamine).
Supercritical fluid extraction of pentachlorophenol from pressure-treated wood. Separation Science and Technology32(6)– Schneider, P.
F Pressure measurement in wood as a method to understand pressure impregnation process: Bethell, Rueping, Lowry and supercritical carbon dioxide.
diss., Oregon State University, Corvallis. When chelants are used as cosolvents, the complexing agents bind to the metal ions, hence enabling extraction of the resulting complexes into the supercritical medium. The structures of the complexing molecules alter the polarity of the fluid medium, hence increasing the extraction of metal ions .Author: Daniel Assumpção Bertuol, Franco Rico Amado, Estevan Dorneles Cruz, Eduardo Hiromitsu Tanabe.
Contamination of the environment by waste CCA (Cu, Cr, As) wood, containing the toxic heavy metals, copper, chromium, and arsenic that are hazardous to human health, can be significantly reduced by supercritical fluid extraction (SFE) technology.
An environmentally benign solution for the detoxification of these CCA woods is the use of SFE technology for the treatment because no extra pollutant Cited by: The posterior derivatization with TEA-AA of the TSE extracts using a Soxhlet system, was very slow, about 6 h.
Instead, when the derivatization reaction is carried out under carbon dioxide supercritical (CO 2, sc) fluid, it is completed in only 30 minutes, and the yield is equal to the reaction made in Soxhlet system.
Because of that, we prefer Cited by: 5. MATERIAL SAFETY DATA SHEET 1. Product and Company Identification Material name Penta OL Technical Pentachlorophenol Revision date Version # 01 CAS # Mixture Product use Wood preservative. Synonym(s) None.
Manufacturer/Supplier KMG- File Size: KB. Exposure to pentachlorophenol in the indoor air of pressure-treated log homes brushed with pentachlorophenol has been measured at to parts per billion (ppb), and levels in the air of industrially dipped, non-pressure-treated log homes have been measured at to ppb.
Levels. Supercritical Fluid Extraction of Pentachlorophenol from Pressure-Treated Wood. Separation Science and Technology32 (6), DOI: / P.
Chen, W. Zhou, L. Tavlarides. Remediation of polychlorinated biphenyl contaminated soils/sediments by supercritical fluid by: Report • The role of pentachlorophenol treated wood for emissions of dioxins into the environment 7 As most of the dip‑treatment plants were in southern Sweden, it is very likely that most of the dip‑treated wood was used in this region, probably for the construction of detached houses built over the period ‑ Ohira T., Extraction of pentachlorophenol from pressure treated wood using supercritical carbon dioxide book M., Itoya Y., and Nakamura S.
() Efficient extraction of hinokitiol from wood of Hiba with supercritical carbon dioxide. Mokuzai gakkaishi. 42, – Google ScholarCited by: 3. Abstract Solvent extraction of pent achlorophenol (PCP) from wood chips of the PCP-treated ammunition box has been studied using methanol, ethanol and acetonitrile.
Experimental variables were chosen as the composition of sol-vents, the ratio of solvent per dried wood, size of the substance, extraction temperature and sonication applied to the.
tors. Supercritical fluid extraction was carried out at constant temperature and time and the pressure of extraction was varied. The pressure of extraction of scopoletin from different plant varieties reported in the literature was with ethanol as a modifier–18 In this experiment only pure carbon dioxide.
The extraction of pentachlorophenol (PCP) from pressure-treated wood wafers with supercritical carbon dioxide (SC-CO2) was studied in a continuous-flow extractor.
Ohira T., Terauchi F., and Yatagai M. () Tropolones extracted from the wood of western red cedar by supercritical carbon dioxide.
Holzforsch – CrossRef Google ScholarCited by: 3. Jung-Seok Yi has written: 'The extraction of pentachlorophenol from pressure treated wood using supercritical carbon dioxide' -- subject(s): Pentachlorophenol, Supercritical fluid extraction Asked.
The extraction of caffeine from whole coffee beans with supercritical carbon dioxide was studied in a continuous‐flow extraction apparatus. Decaffeination rates were determined as a function of CO 2 flow rate, temperature and pressure by continuously monitoring the caffeine in the effluent with a flame ionization detector.
The full text of this article hosted at is unavailable due to technical difficulties. preserving wood, the pressure process and the non-pressure process. The pres-sure-treating process involves placing the wood in a pressure-treating vessel where it is immersed in the preserva-tive and then subjected to applied pres-sure.
The excess penta is vacuumed from the vessel and the treated wood is removed, inspected, stored, and shipped. treated wood may lead to further formation of these contaminant compounds. Pentachlorophenol volatilizes from treated wood. It has a significant phenolic odor, which becomes quite strong when the material is heated.
Though not registered for indoor use, heavily treated interior surfaces may be a source of exposure sufficient. SFE is based on the use of carbon dioxide in supercritical phase, which is at low pressure and temperature (74 bar and 32°C): in this state CO 2 possesses a polarity similar to pentane and so it is a good candidate for the extraction of lipophilic by: Pentachlorophenol treated wood is unlikely to be involved in a release or spill because the pentachlorophenol chemical is fixed in the wood.
If pentachlorophenol treated wood or chemical is released, follow the instructions below. Personal Precautions, Protective Equipment and File Size: KB. Supercritical fluid extraction of pentachlorophenol from pressure-treated wood. Separation Science and Technology 32(6) Progress 01/01/97 to 12/31/97 Outputs Studies to develop a better understanding of the effects of pressure change on the dimensional stability of wood during supercritical fluid impregnation are continuing.
The treated wood chips are then subjected to supercritical fluid treatment, at high pressure and moderate temperatures, using, for example, carbon dioxide and modifiers. The process can be closely regulated by varying temperature or pressure. The pentachlorophenol in the resulting extract can be recovered for either reuse or disposal.
The second use is the long-term protection of wood from fungi by soaking it or permeating it in an autoclave with solvents containing pentachlorophenol at % concentration.
Protection lasts years. This is the only use of pentachlorophenol in the United States. Supercritical fluid extraction (SFE) is an alternative sample preparation method with general goals of reduced use of organic solvents and increased sample throughput. The factors to consider include temperature, pressure, sample volume, analyte collection, modifier (cosolvent) addition, flow and pressure control, and Size: KB.
Pentachlorophenol (PCP) is an organochlorine compound used as a pesticide and a produced in the s, it is marketed under many trade names. It can be found as pure PCP, or as the sodium salt of PCP, the latter which dissolves easily in al formula: C₆HCl₅O.
United States Environmental Protection Agency National Risk Management Research Laboratory Research Triangle Park, NC Research and Development EPA//SR/ 4>EPA Project Summary Products of Incomplete Combustion from Direct Burning Of Pentachlorophenol-treated Wood Wastes S.Y.
Lee and J.C. Valenti The report gives results of a study to identify potential air pollution. Pentachlorophenol Pressure Treated Wood. Trade Names/Synonyms. Penta-treated wood. Recommended Use. Poles, timber, Cross-Arms.
Restrictions on Use. Pentachlorophenol pressure treated wood is treated with a Restricted Use Pesticide regulated under the Federal Insecticide, Fungicide, and Rodenticide Act (FIFRA), and must be used for.
SAFETY DATA SHEET Issue Date: June Revision Date: June SDS ID: 01 * * *Section 1 - IDENTIFICATION* * * Material Name: Pentachlorophenol Pressure Treated Wood. Trade Names/Synonyms. Penta-treated wood.
Recommended Use. Poles, Piling, Posts, Lumber, Timbers. Restrictions on UseFile Size: 1MB. EPA//R/ October CONTAMINANTS AND REMEDIAL OPTIONS AT WOOD PRESERVING SITES Foster Wheeler Enviresponse, Inc. Edison, New Jersey i Contract No.
C Work Assignment 2-R Mary K. Stinson Technical Support Branch Superfund Technology Demonstration Division Edison, New Jersey RISK REDUCTION ENGINEERING. The subject site is a former lumber mill and wood-treating facility that has undergone extended remedial efforts.
Pentachlorophenol (PCP) levels ranging up to 2, mg/Kg remained within a smear zone located approximately five to seven feet beneath a concrete floor. (Tc = 31°C, Pc = 74 bar) and water (Tc = °C, Pc = bar) but some processes (extraction, reactions) involove the use of supercritical methanol, ethanol, propane, ethane mainly.
Supercritical CO 2 processes are the most widely spread as these are exempt of the operations of elimination of solvent residues, operations generally needed when. Pentachlorophenol (PCP) is a biocide used widely in the wood preservation industry.
The oxidative sequence ultimately en ds in the formation of carbon dioxide. Microbial removal of pentachlorophenol from soil using Flavobacterium. Enzyme Microbiol. Dasappa, S.M. and R.C. Loehr. Toxicity reduction in contaminated soil File Size: KB.
Pentachlorophenol was one of the most widely used biocides in the United States. Although it is no longer available to the general public, it continues to be an exposure risk. Exposures can occur from volatilization of the chemical from treated surfaces and from skin contact with treated wood.
Pentachlorophenol has been found at about of the more than 1, hazardous waste sites on. Material Safety Data Sheet Pentachlorophenol Treated Wood 4/14/ _____ Page 3 of 7 Print Date: 4/14/ * * * Section 8 - Exposure Controls / Personal Protection * * * Engineering Controls Use with adequate ventilation to ensure exposure levels are maintained below the exposure limits.
Use a. The present invention is a process for the extraction of cork-containing material by means of a compressed gas at temperatures between 10 and ° C. and pressures between 1 and bar, wherein the extraction is carried out in particular at isobaric conditions, the compressed gas, the bulk radially or flows through axially and the bed to be extracted is combined with an adsorption material.
Video shows what pentachlorophenol means. A fully chlorinated derivative of phenol that is used as a fungicide and wood preservative. pentachlorophenol synonyms: PCP. Pentachlorophenol .C.A. Bolin, S.T.
Smith / Renewable and Sustainable Energy Reviews 15 () – Fig. 1. Life cycle stages of penta-treated utility poles. product (pcf) and is .*The Use of Supercritical Carbon Dioxide to Isolate Sterols from Kraft Black Liquor Tall Oil, Richard Gilbert, Richard Venditti, Dimitris Argyropoulos, Consortium for Plant Biotechnology Research, CPBR SymposiumWashington DC, February