Academic literature on the topic 'Chemical removal'

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Journal articles on the topic "Chemical removal"

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Fan, Jie, Han Hu, Ying Zhang, and Lei Zhu. "Biological Phosphorus Removal Combined with Ferrous Chemical Phosphorus Removal." Advanced Materials Research 955-959 (June 2014): 3339–42. http://dx.doi.org/10.4028/www.scientific.net/amr.955-959.3339.

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Chemical phosphorus removal is widely applied to enhance the biological phosphorus removal in order to meet the discharge requirement. Performance change caused by ferrous sulfate was investigated in this study. Compared to the control system which was not chemically dosed, pH and SVI slightly decreased while conductivity increased. The correlation between phosphorus and conductivity was weakened. The release and uptake of potassium declined, illustrating a negative impact of chemical precipitant on phosphorus accumulating organisms (PAO). The phosphorus uptake decreased while phosphorus relea
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Sharon, Vinitha. "Effect of Greywater Characteristics on its Chemical Coagulation." International Journal of Engineering Technology and Management Sciences 4, no. 2 (2020): 1–6. http://dx.doi.org/10.46647/ijetms.2020.v04i02.001.

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The effect of physico-chemical characteristics of greywater on its chemical coagulation was assessed employing real greywater with varying characteristics using both alum and polyaluminium chloride (PACl) as coagulants. Optimum PACl dosages required were significantly less compared to alum for similar initial turbidity levels. Also, PACl produced less turbid treated greywater. As the initial pH increased, the optimum coagulant dose also increased for both alum and PACl. At similar optimum dosages, PACl gave higher COD removal compared to alum. Total coliform removal showed no significant diffe
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Altinbaş, M., C. Yangin, and I. Ozturk. "Struvite precipitation from anaerobically treated municipal and landfill wastewaters." Water Science and Technology 46, no. 9 (2002): 271–78. http://dx.doi.org/10.2166/wst.2002.0257.

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A two-stage treatment system including upflow anaerobic sludge blanket reactor pre-treatment combined with a chemical post treatment system such as magnesium ammonium phosphate (MAP) precipitation was proposed as a comparable alternative to conventional biological treatment. In this study, anaerobically pre-treated domestic wastewater, domestic wastewater mixed with 2% and 3% of leachate by volume and raw leachate were further treated chemically with MAP precipitation. MAP precipitation was both applied at the stoichiometric ratio (Mg:NH4 = PO4; 1:1:1) and above the stoichiometric ratio (1.1:1
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Watanabe, Yoshimasa. "Phosphorous removal by chemical coagulation." Japan journal of water pollution research 11, no. 10 (1988): 611–16. http://dx.doi.org/10.2965/jswe1978.11.611.

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Zollitsch, Carsten. "Chemical Removal of Powder Coatings." JOT-International Surface Technology 4, no. 1 (2011): 36–37. http://dx.doi.org/10.1365/s35724-011-0015-5.

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Thistleton, J., T. Clark, P. Pearce, and S. A. Parsons. "Mechanisms of Chemical Phosphorus Removal." Process Safety and Environmental Protection 79, no. 6 (2001): 339–44. http://dx.doi.org/10.1205/095758201753373104.

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Kono, Akihiko, Kenji Yada, Hideo Horibe, Hiromitsu Ota, and Motonori Yanagi. "Removal of Negative-tone Novolak Chemical Amplification Resist by Chemicals." KAGAKU KOGAKU RONBUNSHU 36, no. 6 (2010): 589–93. http://dx.doi.org/10.1252/kakoronbunshu.36.589.

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Taherabdollah, Ali, and Mustafa Abdullah. "Comparison of Removal of Chromium by using Natural and Chemical Adsorbents." International Journal of Science and Research (IJSR) 12, no. 9 (2023): 642–45. http://dx.doi.org/10.21275/sr23903165126.

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Hande Gursoy-Haksevenler, B., and Idil Arslan-Alaton. "Treatment of olive mill wastewater by chemical processes: effect of acid cracking pretreatment." Water Science and Technology 69, no. 7 (2014): 1453–61. http://dx.doi.org/10.2166/wst.2014.042.

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The effect of acid cracking (pH 2.0; T 70 °C) and filtration as a pretreatment step on the chemical treatability of olive mill wastewater (chemical oxygen demand (COD) 150,000 m/L; total organic carbon (TOC) 36,000 mg/L; oil–grease 8,200 mg/L; total phenols 3,800 mg/L) was investigated. FeCl3 coagulation, Ca(OH)2 precipitation, electrocoagulation using stainless steel electrodes and the Fenton's reagent were applied as chemical treatment methods. Removal performances were examined in terms of COD, TOC, oil–grease, total phenols, colour, suspended solids and acute toxicity with the photobacteri
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Elsheikh, Mahmoud Abdel-Shafy. "Tannery wastewater pre-treatment." Water Science and Technology 60, no. 2 (2009): 433–40. http://dx.doi.org/10.2166/wst.2009.351.

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Tannery wastewater is one of the most pollution sources. It can cause environmental problems related to its high organic matter, suspended solids and chromium. Chromium (III) salts are the most widely used chemicals for tanning processes, causing the tannery wastewater to be highly pollutant with chromium. The main objective of this study is to investigate the pre-treatment of an actual Egyptian tannery wastewater using two systems; the first electrolytic system and the second physico-chemical system. The performances of electrolytic system at current of 10, 20, 30 and 40 A were discussed. Poo
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Dissertations / Theses on the topic "Chemical removal"

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Bernstein, Howard. "A system for heparin removal." Thesis, Massachusetts Institute of Technology, 1985. http://hdl.handle.net/1721.1/15291.

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Thesis (Ph. D.)--Massachusetts Institute of Technology, Dept. of Chemical Engineering, 1985.<br>MICROFICHE COPY AVAILABLE IN ARCHIVES AND SCIENCE.<br>Bibliography: leaves 255-264.<br>by Howard Bernstein.<br>Ph.D.
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Gaulin, Jean-Philippe. "Selective caffeine removal by microbial consortia." Thesis, McGill University, 2003. http://digitool.Library.McGill.CA:80/R/?func=dbin-jump-full&object_id=80272.

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Coffee processing presents a considerable waste disposal problem, mainly because of the large volumes generated and the chemical composition of the by-products, particularly the caffeine levels. The use of Pseudomonas putida IF-3, a caffeine-degrading microorganism, in a microbial consortium for bioremediation of caffeine found in coffee wastes was investigated. Caffeine degradation was observed in fed-batch reactor experiments with caffeine as sole source of carbon and nitrogen. Metabolic regulation and caffeine removal potential by Pseudomonas putida IF-3 were investigated by suppleme
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Roostaei, Nadia. "Removal of phenol from water by adsorption." Thesis, National Library of Canada = Bibliothèque nationale du Canada, 1999. http://www.collectionscanada.ca/obj/s4/f2/dsk1/tape8/PQDD_0001/MQ46605.pdf.

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Abdulrahman, Aymn. "Removal of mixed acids from aqueous solution." Thesis, The University of Maine, 2015. http://pqdtopen.proquest.com/#viewpdf?dispub=3662514.

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<p> Carboxylic acids are commonly generated in biorefinery operations such as fermentation or aqueous extraction of hemicellulose feedstocks. In most cases, organic acids are generated as dilute components in aqueous streams. If they can be recovered from solution inexpensively they may find value as pure chemical products or as starting materials for a wide variety of organic products, including biofuels.</p><p> Liquid-liquid extraction is a separation method applied to recover mixed carboxylic acids from a fermented wood extract. These acids included: acetic, propionic, butyric, valeric, c
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Ng, Dedy. "Nanoparticles removal in post-CMP (Chemical-Mechanical Polishing) cleaning." Thesis, Texas A&M University, 2005. http://hdl.handle.net/1969.1/4159.

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Research was performed to study the particle adhesion on the wafer surface after the chemical-mechanical polishing (CMP) process. The embedded particles can be abrasive particles from the slurry, debris from pad material, and particles of film being polished. Different methods of particle removal mechanism were investigated in order to find out the most effective technique. In post-CMP cleaning, surfactant was added in the solution. Results were compared with cleaning without surfactant and showed that cleaning was more effective with the combined interaction of the mechanical effort from the
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Mahmud, Hassan. "Development of pervaporation membrane for volatile organic chemical removal." Thesis, University of Ottawa (Canada), 1996. http://hdl.handle.net/10393/9896.

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Pervaporation is a membrane based process which overcomes many of the deficiencies of current technologies for the removal/recovery of volatile organic chemicals (VOCs) from aqueous streams. In this process, VOCs from a liquid stream are driven across a permselective membrane and exit as a vapor due to the vacuum maintained in the downstream side of the membrane. Proven hydrophobic membranes used for pervaporation today suffer from limitations of mechanical stability, while membranes with superior mechanical characteristics do not possess sufficient selectivity to be useful for these applicati
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Omoregie, Henryson Osawaru 1953. "Removal of chemical species by electrically charged bicomponent fibers." Diss., The University of Arizona, 1996. http://hdl.handle.net/10150/282121.

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A new water deionization method was conceived and investigated. Bench scale reactors were designed and tested. Numerical analysis of ion movement in water in the presence of electrical, hydraulic, and chemical gradients was conducted. The new water treatment technology uses bicomponent fibers (BCF). Ions in water are concentrated near charged bicomponent fibers. Bicomponent fibers are composed of two materials. The outer annulus is made of nylon and has an inside diameter of 10 mum and outer diameter of 50 mum. The inner annulus is composed of carbon powder and has an outer diameter of 10 mum.
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Sundaram, Hari Prashanth. "SO₂ removal with coal scrubbing." Morgantown, W. Va. : [West Virginia University Libraries], 2001. http://etd.wvu.edu/templates/showETD.cfm?recnum=2035.

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Thesis (M.S.)--West Virginia University, 2001.<br>Title from document title page. Document formatted into pages; contains vii, 42 p. : ill. (some col.). Vita. Includes abstract. Includes bibliographical references (p. 33-34).
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Shieh, Marvin Bryan. "Face-up chemical mechanical polishing : kinematics and material removal rate." Thesis, Massachusetts Institute of Technology, 2006. http://hdl.handle.net/1721.1/36701.

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Thesis (S.B.)--Massachusetts Institute of Technology, Dept. of Mechanical Engineering, 2006.<br>Includes bibliographical references (leaf 27).<br>A working prototype face-up CMP tool has successfully been completed. Experiments conducted on the face-up CMP machine qualitatively correspond with the theoretical polishing model. Discrepancies in data from the theoretical model could potentially be caused by non-uniform loading of the polishing pad and uneven distribution of slurry over the pad due to the edge effects on fluid flow. Despite the discrepancies, experimental data suggest that the the
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Chua, Xiang Le. "Derivatisation of chemical warfare agent degradant without removal of water." Thesis, Chua, Xiang Le (2018) Derivatisation of chemical warfare agent degradant without removal of water. Masters by Coursework thesis, Murdoch University, 2018. https://researchrepository.murdoch.edu.au/id/eprint/42915/.

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Degradation products are distinct chemical signature for the detection of chemical warfare agents and forensic attribution in cases where the parent compound no longer exists. Being the common degradant to nerve agents, methylphosphonic acid serves as an explicit biomarker for the use of nerve agents. However, this non-volatile compound requires derivatisation prior to its detection, which incurs time-limiting factor and error. Therefore, development for a novel rapid and simple approach for identifying these degradants is of high importance to shed light on the use of chemical warfare agents
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Books on the topic "Chemical removal"

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Water Environment Federation. Task Force on Biological and Chemical Systems for Nutrient Removal. and Water Environment Federation. Municipal Subcommittee., eds. Biological and chemical systems for nutrient removal: A special publication. Water Environment Federation, 1998.

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Wong, L. Biological removal and chemical recovery of metals from sludges. Purdue University Press, 1985.

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Randy, Merritt, Williamson Ashley D, and United States. Environmental Protection Agency. Control Technology Center, eds. Evaluation of a liquid chemical scrubber system for styrene removal. U.S. Environmental Protection Agency, Control Technology Center, 1994.

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Batts, Robert Alan. Chemical phosphorus removal from wastewaters: A laboratory and pilot scale study. University of Birmingham, 1996.

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F, Hock V., US Army Center for Public Works., and Construction Engineering Research Laboratories (U.S.), eds. Demonstration of lead-based paint removal and chemical stabilization using Blastox®. U.S. Army Center Public Works, 1996.

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P, Huang C., and Water Environment Research Foundation, eds. Chemical characteristics and solids uptake of heavy metals in wastewater treatment: Project 93-CTS-1. Water Environment Research Foundation, 2000.

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Evanson, Ian Edward John. Removal of volatile organic compounds by absorption with catalytic enhanced chemical reaction. University of Birmingham, 1999.

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Randy, Merritt, Williamson Ashley D, and Air and Energy Engineering Research Laboratory, eds. Evaluation of a liquid chemical scrubber system for styrene removal: Project summary. U.S. Environmental Protection Agency, Air and Energy Engineering Research Laboratory, 1995.

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Lofrano, Giusy. Emerging compounds removal from wastewater: Natural and solar based treatments. Springer, 2012.

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W, Hanson Steven, and Water Engineering Research Laboratory, eds. Removal of uranium from drinking water by ion exchange and chemical clarification: Project summary. U.S. Environmental Protection Agency, Water Engineering Research Laboratory, 1987.

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Book chapters on the topic "Chemical removal"

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Bergs, Thomas, and Fritz Klocke. "Chemical Material Removal." In Manufacturing Processes 3. Springer Berlin Heidelberg, 2025. https://doi.org/10.1007/978-3-662-70580-3_3.

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Rana, Harvesh Kumar, Amit Kumar Singh, Virendra Kumar, and Shailendra Arya. "Nanoadsorbents for Removal of Chemical Contaminants." In Engineering Materials. Springer Nature Switzerland, 2025. https://doi.org/10.1007/978-3-031-87409-3_6.

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Zhao, Wenyi. "Methods for Impurity Removal." In Handbook for Chemical Process Research and Development, Second Edition, 2nd ed. CRC Press, 2023. http://dx.doi.org/10.1201/9781003288411-20.

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Henze, Mogens, and Poul Harremoës. "Chemical-Biological Nutrient Removal — The HYPRO Concept." In Chemical Water and Wastewater Treatment. Springer Berlin Heidelberg, 1990. http://dx.doi.org/10.1007/978-3-642-76093-8_33.

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Eikebrokk, Bjørnar. "Removal of Humic Substances by Coagulation." In Chemical Water and Wastewater Treatment IV. Springer Berlin Heidelberg, 1996. http://dx.doi.org/10.1007/978-3-642-61196-4_15.

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Rott, Ulrich. "Magnetic Floc Separation in Chemical Phosphate Removal." In Chemical Water and Wastewater Treatment II. Springer Berlin Heidelberg, 1992. http://dx.doi.org/10.1007/978-3-642-77827-8_33.

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Kaviya, S. "Physical and Chemical Methods for Selenium Removal." In Selenium Contamination in Water. John Wiley & Sons, Ltd, 2021. http://dx.doi.org/10.1002/9781119693567.ch10.

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Zhao, Wenyi. "Methods for Residual Metal Removal." In Handbook for Chemical Process Research and Development, Second Edition, 2nd ed. CRC Press, 2023. http://dx.doi.org/10.1201/9781003288411-19.

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Tadini, Pietro, Urbano Tancredi, Michele Grassi, et al. "Comparison of Chemical Propulsion Solutions for Large Space Debris Active Removal." In Chemical Rocket Propulsion. Springer International Publishing, 2016. http://dx.doi.org/10.1007/978-3-319-27748-6_41.

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Sidebottom, H. W., O. Rattigan, J. J. Treacy, and O. J. Nielsen. "Atmospheric Removal Processes for Chlorine-Containing Compounds." In Physico-Chemical Behaviour of Atmospheric Pollutants. Springer Netherlands, 1990. http://dx.doi.org/10.1007/978-94-009-0567-2_34.

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Conference papers on the topic "Chemical removal"

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Hunter, David A., and Skid C. Thomason. "Surface Preparation: Advances in Chemical Coating Removal." In Paint and Coatings Expo (PACE) 2007. SSPC, 2007. https://doi.org/10.5006/s2007-00044.

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Abstract This paper introduces the available technology of chemical coating removal as an alternative to mechanical coating removal by comparing and contrasting the advantages and disadvantages of each chemical coating removal technology. Due to the high cost and environmental drawbacks of mechanical methods of coating removal, chemical coating removal systems have advanced as a cost effective and environmentally friendly way to remove coatings that are highly cost effective on a per square foot basis cost comparison. The presentation will discuss all chemical coating removal technology, featu
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Iezzi, Erick B., and Grant C. Daniels. "Selective Degradation and Removal of Silyl-Containing Topcoats from Non-Metallic Substrates Using Environmentally Friendly Fluoride Salts." In CONFERENCE 2023. AMPP, 2023. https://doi.org/10.5006/c2023-18797.

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Abstract The topcoat and primer used on the exterior of Department of Defense (DoD) assets (e.g., aircraft, vehicles) are currently removed using harsh chemicals, abrasive materials, or thermal treatments. All of these methods generate hazardous waste, are labor intensive, and consume resources. Chemical stripping is one of the most effective methods of coating removal, especially on large assets, yet it remains the most hazardous to individuals due to the potential for dermal and inhalation exposure of toxic chemicals. Additionally, none of these methods can selectively remove the topcoat fro
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Ranieri, Pietro, Jason Stimson, Levi Snowden, and Peter Yancey. "Atmospheric Plasma: One-Step Precision Process to Remove Coating and Promote Chemical Adhesion." In CONFERENCE 2022. AMPP, 2022. https://doi.org/10.5006/c2022-18152.

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Abstract Removal of coatings around thin-walled ligaments or potentially defective structures require a precision tool that does not impact the structure leading to failure. The removal of any metal or damage to the surface must be avoided in these scenarios, which disqualifies highly abrasive removal methods such as blast cleaning and water-jetting. Atmospheric plasma coating removal (APCR) is a precision tool that can remove the layers of the original coating and modify the surface properties of the bare metal surface to promote chemical adhesion by increasing surface energy. Presented in th
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Morris, Al. "Rules of Removal: Chemical Paint Stripping and Historic Masonry." In SSPC 2014 Greencoat. SSPC, 2014. https://doi.org/10.5006/s2014-00035.

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Flores, Oscar E. "Condenser Chemical Cleaning Using Foamed Ethylenediaminetetraacetic Acid." In CORROSION 1985. NACE International, 1985. https://doi.org/10.5006/c1985-85185.

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Abstract Two condenser chemical cleanings were performed at our Mohave Generating Station using foamed tetrasodium ethylenediaminetetraacetic acid (sodium salt of EDTA). The cleanings were done to remove calcium sulfate scale from the condenser tube internals. The calcium sulfate precipitation was caused by upset chemical conditions in the circulating water system. As a result of the scale and the associated drop in heat transfer, both units were restricted from their full load output. The cleanings were successful in achieving complete scale removal. Based on our survey of the chemical cleani
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Caplan, Gary. "Chemical Cleaning Methodologies." In CORROSION 1988. NACE International, 1988. https://doi.org/10.5006/c1988-88224.

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Abstract Deposition in industrial cooling water systems can result in deposit-induced corrosion, reduced heat transfer and loss of product throughput. Both mechanical and chemical cleaning techniques are available for foulant removal. However, this paper focuses on chemical cleaning and more specifically on the key considerations in planning an acid cleaning. Areas of discussion include equipment inspection, deposit analysis, acid selection, spent acid disposal and safety. A checklist is provided to simplify the cleaning task.
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Jevec, J. M., P. M. Knollmeyer, and P. Paramithas. "Steam Generator Chemical Cleaning at the Palo Verde Nuclear Generating Station." In CORROSION 1995. NACE International, 1995. https://doi.org/10.5006/c1995-95443.

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Abstract The secondary side of the Palo Verde Units 2 and 3 steam generators were chemically cleaned in 1994. The primary purpose of the chemical cleaning was to remove deposits bridging between adjacent tubes and also to remove bulk tube and tubesheet deposits. A secondary objective was to remove deposits from the flow distribution plate-to-tube crevice. The chemical cleaning consisted of a magnetite dissolution step, a separate step aimed at removing deposits in the flow distribution plate crevices, and a final step to remove residual copper and passivate the carbon steel surfaces of the ste
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Harmer, David E. "Dresden-1 Chemical Cleaning Results of Chemical and Radiation Measurements." In CORROSION 1986. NACE International, 1986. https://doi.org/10.5006/c1986-86355.

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Abstract The introduction of NS-1 solvent into the entire primary system of Dresden Unit-1 nuclear power reactor on September 12, 1984, represented the culmination of several years of development, testing, planning, and construction. The solvent, NS-1, was newly developed to dissolve the highly radioactive deposits of nickel ferrite. An extensive metallurgical test program followed to document its compatibility with the construction materials of the Unit. To circulate the cleaning solvent throughout the primary system, temporary equipment was installed. Moreover, a completely new facility was
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Weaver, Carl E., and Ginger Curtis. "The Application of Fourier Transform Infrared Spectrometry in Industrial Chemical Cleaning." In CORROSION 1998. NACE International, 1998. https://doi.org/10.5006/c1998-98337.

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Abstract The loss of efficiency and throughput of refinery and petrochemical processes as a result of the buildup of organic and inorganic scales, films, or fouling deposits on the internal surfaces of the process equipment is a costly problem. Refiners enlist the aid of industrial cleaning services to remove these fouling deposits to regain this loss of efficiency and reduce operating costs. Both mechanical and chemical techniques are utilized in the removal of these deposits. A key principle in successful industrial chemical cleaning is to identify the organic binders for these fouling depos
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Sorrentino, Salvatore, Federico Vernuccio, Elia Broggio, et al. "Nonresonant background removal in broadband CARS microspectroscopy using deep learning algorithms." In Advanced Chemical Microscopy for Life Science and Translational Medicine 2025, edited by Garth J. Simpson, Ji-Xin Cheng, and Wei Min. SPIE, 2025. https://doi.org/10.1117/12.3041439.

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Reports on the topic "Chemical removal"

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Martino, C., D. Herman, J. Pike, and T. Peters. ACTINIDE REMOVAL PROCESS SAMPLE ANALYSIS, CHEMICAL MODELING, AND FILTRATION EVALUATION. Office of Scientific and Technical Information (OSTI), 2014. http://dx.doi.org/10.2172/1134065.

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Raphaelian, L. A. Combined chemical and microbiological removal of organic sulfur from coal. Office of Scientific and Technical Information (OSTI), 1991. http://dx.doi.org/10.2172/6148180.

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Kaste, P. J., R. G. Daniel, R. A. Pesce-Rodriguez, M. A. Schroeder, and J. A. Escarsega. Hydrogen Plasma Removal of Military Paints: Chemical Characterization of Samples. Defense Technical Information Center, 1998. http://dx.doi.org/10.21236/ada354821.

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Setser, D. W. Chemical Reactions of NCL(A Sup 1 Delta): Generation and Removal. Defense Technical Information Center, 1999. http://dx.doi.org/10.21236/ada380849.

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Gray, D., and A. Sawy. Chemical and biodesulfurization systems for removal of organic sulfur from coal. Office of Scientific and Technical Information (OSTI), 1990. http://dx.doi.org/10.2172/6895418.

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Gallagher, J., T. San, and G. Mayer. Removal of color and residual chemical oxygen demand from synfuel wastewater. Office of Scientific and Technical Information (OSTI), 1988. http://dx.doi.org/10.2172/6893041.

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Gates, D. D., K. K. Chao, and P. A. Cameron. The removal of mercury from solid mixed waste using chemical leaching processes. Office of Scientific and Technical Information (OSTI), 1995. http://dx.doi.org/10.2172/95487.

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Bauer, C. B., R. D. Rogers, L. Nunez, M. D. Ziemer, T. T. Pleune, and G. F. Vandegrift. Review and evaluation of extractants for strontium removal using magnetically assisted chemical separation. Office of Scientific and Technical Information (OSTI), 1995. http://dx.doi.org/10.2172/219548.

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Cundiff, Charles H., Robert M. Leverette, and Jason R. Varner. Low Volatile Organic Compound (VOC) Chemical Agent Resistant Coating (CARC) Removal and Disposal. Defense Technical Information Center, 2001. http://dx.doi.org/10.21236/ada388926.

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Dai, Y., and C. J. King. Modeling of fermentation with continuous lactic acid removal by extraction utilizing reversible chemical complexation. Office of Scientific and Technical Information (OSTI), 1995. http://dx.doi.org/10.2172/90681.

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