Relevant bibliographies by topics / Bio-oxidation

Contents

  1. Journal articles
  2. Dissertations / Theses
  3. Books
  4. Book chapters
  5. Conference papers
  6. Reports

Academic literature on the topic 'Bio-oxidation'

Author: Grafiati
Published: 4 June 2021
Last updated: 1 February 2022

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Journal articles on the topic "Bio-oxidation"

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JIANG, Tao, Qian LI, Yong-bin YANG, Guang-hui LI, and Guan-zhou QIU. "Bio-oxidation of arsenopyrite." Transactions of Nonferrous Metals Society of China 18, no. 6 (December 2008): 1433–38. http://dx.doi.org/10.1016/s1003-6326(09)60021-2.

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Blight, K., D. E. Ralph, and S. Thurgate. "Pyrite surfaces after bio-leaching: a mechanism for bio-oxidation." Hydrometallurgy 58, no. 3 (December 2000): 227–37. http://dx.doi.org/10.1016/s0304-386x(00)00136-5.

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Moro-oka, Yoshihiko, and Munetaka Akita. "Bio-inorganic approach to hydrocarbon oxidation." Catalysis Today 41, no. 4 (June 1998): 327–38. http://dx.doi.org/10.1016/s0920-5861(98)00023-6.

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SAVARD, M. E., R. GREENHALGH, and B. A. BLACKWELL. "BIO-OXIDATION OF BAZZANENE AND TRICHODIENE." Mycotoxins 1988, no. 1Supplement (1988): 141–42. http://dx.doi.org/10.2520/myco1975.1988.1supplement_141.

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Bechi, Beatrice, Susanne Herter, Shane McKenna, Christopher Riley, Silke Leimkühler, Nicholas J. Turner, and Andrew J. Carnell. "Catalytic bio–chemo and bio–bio tandem oxidation reactions for amide and carboxylic acid synthesis." Green Chem. 16, no. 10 (2014): 4524–29. http://dx.doi.org/10.1039/c4gc01321b.

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Montes-Rosua, Cristina, Nieves Iglesias-Gonzalez, Rafael Romero, Alfonso Mazuelos, and Francisco Carranza. "Monitoring polythionate bio-oxidation by conductivity measurement." Minerals Engineering 95 (September 2016): 40–47. http://dx.doi.org/10.1016/j.mineng.2016.06.008.

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Morales, Marjorie, Jonathan Arancibia, Mariana Lemus, Javier Silva, Juan Carlos Gentina, and German Aroca. "Bio-oxidation of H2S by Sulfolobus metallicus." Biotechnology Letters 33, no. 11 (July 10, 2011): 2141–45. http://dx.doi.org/10.1007/s10529-011-0689-2.

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Xiao, Dan, Jennifer Gregg, K. V. Lakshmi, and Peter J. Bonitatibus. "Bio-Inspired Molecular Catalysts for Water Oxidation." Catalysts 11, no. 9 (August 31, 2021): 1068. http://dx.doi.org/10.3390/catal11091068.

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The catalytic tetranuclear manganese-calcium-oxo cluster in the photosynthetic reaction center, photosystem II, provides an excellent blueprint for light-driven water oxidation in nature. The water oxidation reaction has attracted intense interest due to its potential as a renewable, clean, and environmentally benign source of energy production. Inspired by the oxygen-evolving complex of photosystem II, a large of number of highly innovative synthetic bio-inspired molecular catalysts are being developed that incorporate relatively cheap and abundant metals such as Mn, Fe, Co, Ni, and Cu, as well as Ru and Ir, in their design. In this review, we briefly discuss the historic milestones that have been achieved in the development of transition metal catalysts and focus on a detailed description of recent progress in the field.
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Kang, Eun-Tae, Jong-Po Kim, and Chang-Yeoul Kim. "Surface modification and bio-activation of bio-inert glasses through thermal oxidation." Journal of Non-Crystalline Solids 389 (April 2014): 1–10. http://dx.doi.org/10.1016/j.jnoncrysol.2014.01.043.

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Lei, Jiang. "Surface Characteristic of Pyrrhotite Bio-Oxidized by Acidithiobacillus Ferrooxidans." Advanced Materials Research 343-344 (September 2011): 920–25. http://dx.doi.org/10.4028/www.scientific.net/amr.343-344.920.

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This paper deals with the surface characteristic of pyrrhotite bio-oxidized byAcidithiobacillus ferrooxidans. Large amounts of jarosite and element sulfur were determined in the bio-oxidation processe of pyrrhotite. More complicatedly, biofilm exists on the surface of pyrrhotite. This type of structured community ofA. ferrooxidanswas enclosed in the extracellular polymeric substances (EPS), and covered with the deposition generated in the bio-oxidation processe of pyrrhotite.
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Dissertations / Theses on the topic "Bio-oxidation"

1

Grant, C. R. "Evaluation of the bio-oxidation of alkanes." Thesis, University College London (University of London), 2012. http://discovery.ucl.ac.uk/1367613/.

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This thesis documents the progress made in utilising the alkane hydroxylase complex of P.putida GPo1 expressed in E.coli as a whole-cell biocatalyst for the oxidation of n-dodecane to 1-dodecanol. The process is of considerable interest due to the difficulty in performing the reaction using conventional chemistry and the large global market for fatty alcohols. The first results chapter compares the fermentative bio-oxidations using E.coli pGEc47ΔJ on n-octane and n-dodecane in a stirred tank reactor. The first reported conversion of n-dodecane in-vivo using this enzyme system in a recombinant host is reported. A number of bottlenecks were identified in this chapter; in particular, (i) poor induction of the alkS expression system with ndodecane, which controls the expression of the alk enzymes (ii) a suspected mass transport limitation (iii) substantial over-oxidation of the desired 1- dodecanol product to dodecanoic acid. The second results chapter firstly describes the development of a microwell platform in order to characterise the system more efficiently. Phase mixing limitations and organic phase spillage/evaporation were overcome in order to develop the microwell platform for the fermentative bio-oxidation which is the first reported microwell scale-down which matches the volumetric and specific rates achieved in a bioreactor for a substrate of such low solubility. Secondly, the microwell platform was used with design of experiments (DoE) methodology to rapidly and systematically characterise the overoxidation issue and identify appropriate solutions. Using this approach, substrate solubility was identified as the most critical factor affecting the tendency for overoxidation; the use of cosolvents to improve n-dodecane solubility in the aqueous phase was found to improve the 1-dodecanol yields and reduce dodecanoic acid yields. Oxygen availability and carbon source availability also proved important factors in the extent of overoxidation. Despite the improvements made the problem was only partially overcome and it was decided, based on the results, that biological engineering of the strain was necessary to remove the downstream aldehyde dehydrogenase alkH which was likely to be exacerbating overoxidation. The process of designing and constructing 3 new plasmids is described in results chapters four and five. These plasmids were designed with the aim of identifying the role of various alk proteins and ultimately identifying ways of improving substrate access to the enzyme and reducing overoxidation. It was found as a result of this work that overoxidation was reduced by removal of alkH but that the alkane-1-monooxygenase alkB was still capable of direct overoxidation to the dodecanoic acid even in the absence of alkH. More significantly, the function of an outer membrane protein of unknown function was also confirmed by this work. It was found to be essential for conversion of n-dodecane in-vivo but was also found to be toxic to the host organism when overexpressed. Finally, it was found that the alkane-1-monooxygenase enzyme system was also capable of C14 and C16 alkane oxidation; this has not previously been reported in literature in-vivo.
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High, Jessica M. "Microcosm evaluation of vinyl chloride bio-oxidation under anaerobic conditions." Connect to this title online, 2008. http://etd.lib.clemson.edu/documents/1219865442/.

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Chaturvedula, Sumana. "Gold catalysis for selective oxidation for application to bio-derived substrates." Thesis, Imperial College London, 2013. http://hdl.handle.net/10044/1/14614.

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The depletion of fossil resources, the volatility of the oil price market and the urgency to mitigate the effects of climate change have pushed the development in chemical industry for sustainable, energy efficient and economic processes for fine chemical production. Selective oxidation of alcohols using noble metal catalysts is a key catalytic conversion for the production of carbonylic and carboxylic compounds for the chemical, pharmaceutical, automobile or consumer goods industry. Gold based catalysts, in particular, have demonstrated superior performance over commonly employed catalysts or stoichiometric oxidants. Challenges, however, remain to develop not only active and selective catalysts but with a long lifetime for industrial application. This thesis is based on the study and development of gold based catalyst systems for the selective oxidation of alcohols under mild conditions. The main model compound studied is the selective oxidation of salicyl alcohol to salicyl aldehyde and salicylic acid. Salicyl aldehyde is a very important chemical compound for the production of a range of fine chemicals and chelating compounds with an estimated market capacity of 4000-6000 tonnes/year. Reactions were carried out in a semi-batch stirred glass reactor under atmospheric pressure using air as oxidant and water as solvent. The setup successfully enabled the direct study of the kinetics and mechanism without influences of mass transport. Studies demonstrated the reaction followed sequential mechanism of first order with the consecutive oxidation of salicyl aldehyde to salicylic acid. The main catalyst system used was gold on powdered activated carbon, prepared by sol-immobilisation using Tetrakis(hydroxymethyl)phosphonium chloride (THPC) as stabiliser. 1wt% Au/C achieved maximum turnover frequency numbers (TOF) of 342 h-1 and selectivities of 79% towards salicyl aldehyde at 100% conversion. The increase in gold loading to 3wt% resulted in a decrease in activity caused by an increased gold particle size. The addition of Pd as second active metal showed the formation of an alloy and a decrease in activity with the increase in Pd amount. The application of the Au/C catalyst system for continuous processing was investigated using gold on granular carbon in a trickle bed reactor. Base-free selective oxidation of salicyl alcohol was studied via synthesis of MgO dispersed on oxides, in particular hydrotalcites. The basicity, measured by CO2 adsorption capacity, increased with increased loading of MgO. The catalysts showed potential activity, achieving 59% conversion with 90% selectivity towards salicyl aldehyde.
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Sopaci, Saziye Betul. "Microorganism Mediated Stereoselective Bio-oxidation And Bio-hydrogenation Reactions And Thiamine Pyrophosphate Dependent Enzyme Catalyzed Enantioselective Acyloin Reactions." Phd thesis, METU, 2009. http://etd.lib.metu.edu.tr/upload/2/12610516/index.pdf.

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In this study various microbial and enzymatic methods developed for enantioselective acyloin synthesis for preparation of some pharmaceutically important intermediates. By performing Aspergillus flavus (MAM 200120) mediated biotransformation, enantioselective bio-oxidation of meso-hydrobenzoin was achieved with a high ee value (76%). Racemic form of hydrobenzoin was also employed for the same bio-oxidation process and this bioconversion was resulted in accumulation of meso form (>
90% yield) confirming the suggested mechanism of oxidation-reduction sequence of hydrobenzoin. Wieland-Miescher ketone (3,4,8,8a-tetrahydro-8a-methylnaphthalene-1,6(2H,7H)-dione) is an important starting material for bioactive compounds like steroids and terpenoids. Many synthetic approaches include enantioselective reduction of this compound. In this study Aspergillus niger (MAM 200909) mediated reduction of Wieland-Miescher ketone was achieved with a high yield (80%), de (79%) and ee (94%) value and these results were found much more superior than previously reported studies. Carboligating enzymes benzaldehyde lyase (BAL) (EC 4.1.2.38) and benzoiyl formate decarboxilase (BFD) (E.C. 4.1.1.7) are used for biocatalytic acyloin synthesis. These enzymes are immobilized to surface modified superparamagnetic silica coated nanoparticles by using metal ion affinity technique. With this system recombinant histidine tagged BAL and BFD purified and immobilized to magnetic particles by one-pot purification-immobilization procedure. SDS page analysis showed that our surface modified magnetic particles were eligible for specific binding of histidine tagged proteins. Conventional BAL and BFD catalyzed benzoin condenzation reactions and some representative acyloin reactions were performed with this system with a high enantioselectivity (99-92%) and yield. Results obtained with magnetic particle-enzyme system were also found comparable with that of free enzyme catalyzed reactions.
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Douthwaite, John. "The selective oxidation of bio-derived platform chemicals over supported gold catalysts." Thesis, Cardiff University, 2016. http://orca.cf.ac.uk/93926/.

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A fundamental limitation effecting the exploitation of bio-fuels is that they are not currently economically competitive with conventional fossil fuels. The development of novel chemical processes to convert bi-products from these reactions into high value chemicals could be one method to reduce the economic deficit between these two industries. Glycerol and furfural are produced as bi-products in the production of 1st and 2nd generation bio-fuels. This thesis explores the potential of using supported Au catalysts for the oxidation of these bio-derived compounds for the synthesis of high value chemicals. The reaction conditions were found to significantly affect the product distribution and the reaction rate for the aerobic, liquid phase oxidation of glycerol over a AuPt/TiO2 catalyst. Mechanistic studies suggested that glycerol acid and tartronic acid are primary products in this reaction. This study also implied that C-C scission leading to the unfavourable formation of C1 and C2 products occurred from glyceraldehyde, dihydroxyacetone and glyceric acid. Au nanoparticles supported on hydrophobic supports were found reduce C-C scission, and the incorporation of Pd and Pt to a Au/BN catalyst was found to further increase desirable C3 selectivity. Additional work confirmed that the in-situ formation of H2O2 was primarily responsible for C-C cleavages, which led to the postulation that Dakin oxidation was the mechanistic process by which it proceeds. Supported trimetallic AuPdPt nanoparticles were found to be active for the oxidation of glycerol under base free conditions. The catalyst was found to significantly influence the activity of these particles. It was determined that a Au/TiO2 catalyst could selectively oxidise furfural to produce reasonable yields of furoic Acid. Polymerisation of the substrate was found to inhibit catalytic performance which was suggested to be a result of the polymers binding irreversibly to the catalyst. Optimisation of the catalyst and experimental procedure was found to reduce this unfavourable polymerisation, which led to the production of furoic acid yields in excess of 89% using a AuPd/Mg(OH)2 catalyst. Further tests indicated that the size of the metal nanoparticles and the Au:Pd ratio significantly affected catalytic performance for this reaction. Mechanistic studies identified the presence of three reactions; the direct oxidation of furfural, the oxidative dehydrogenation of furfuryl alcohol and the Cannizzaro reaction. A kinetic study allowed for the determination of the activation energies corresponding to each of these pathways, which ultimately highlighted the potential of using a catalyst for this reaction on an industrial scale.
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Yeh, Ruth Yu-Li. "Treatment of dye wastewaters by adsorption with and without the bio-oxidation process." Thesis, University of South Wales, 1995. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.295273.

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Ardemani, Leandro. "Catalytic conversion of bio-derived platform molecules into useful chemicals via selective oxidation." Thesis, Aston University, 2016. http://publications.aston.ac.uk/31851/.

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Green Chemistry regards the design of products and processes that minimise the use and generation of hazardous substances. Heterogeneous catalysis facilitates such energy and atom efficient processes, affording simple and low cost product isolation methods, and catalytic materials that can be easily recovered and reused. This thesis reports on the selective aerobic oxidation of 5-hydroxymethyl-2-furufural (HMF), a potential platform chemical that may be derived from cellulose, into 2,5-furandicarboxylic acid (FDCA) over noble metal nanoparticles dispersed on a solid base support. FDCA has been touted as a potential replacement for polyethyleneterephtalate (PET) and is also an interesting synthetic building block. Au nanoparticles are extremely active and selective oxidation catalyst for a range of environmental and fine chemical transformations, however they require a homogeneous base, such as NaOH, to work. Au NPs dispersed on hydrotalcites (HT), anionic microporous clays, have shown promise in HMF oxidation to FDCA, hydrotalcite acting as both the support and the source of base. However, key questions remained regarding the nature of active site, potential role of homogeneous contributions and importance of reaction basicity upon activity and selectivity. Kinetic profiling of HMF and its intermediates HMFCA and FFCA over Na-free Au/MgAl HT catalysts highlight the role of base in achieving high FDCA yields. The order of reaction in Au, in oxygen and in HMF were found, determination of the Arrhenius Ea for the R-OH and the R-CHO functions allowed to find the rate-determining step. Ex situ and operando XAS were performed to detect Au oxidation state and Au chemical environment in the catalyst, enlighting the true active site during the selox. Eventual changes in Au oxidation state were investigated to find how the precursor HAuCl4 evolves during the calcination. As the reaction was found to be pH-sensitive and as the calcination of HTs convert them into stronger bases, the impact of calcination temperature was studied; also a comparison between calcination and calcination rehydration protocols was done. The incorporation of Pd into Au catalysts improved activity and lifetime for these AuPd bimetallic formulations. AuPd NPs were prepared via DP method on HT support, varying Au:Pd ratio, then kinetic studies for the selox of HMF to FDCA were carried out, followed by accurate characterisations.
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Chiari, Lucile. "Développement de nouveaux systèmes bio-hybrides pour la photocatalyse asymétrique." Thesis, Université Grenoble Alpes (ComUE), 2019. http://www.theses.fr/2019GREAV029.

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Au cours des dernières décennies, le développement d'une chimie durable est devenu une priorité pour notre société Dans ce contexte, la biocatalyse, par l’utilisation d’enzymes naturelles, modifiées ou artificielles constituées d’un catalyseur de synthèse greffé au sein d’une protéine apparait comme une solution intéressante.Dans ce projet, nous cherchons à développer des photocatalyseurs bio-hybrides combinant un photosensibilisateurs (RuPhot) et un catalyseurs (RuCat) au sein d'un cristal protéique pour la photocatalyse hétérogène d’oxydation asymétrique de substrats organiques en utilisant l’eau comme seule source d’atome d’oxygène. La protéine sélectionnée est le domaine d'oligomérisation de la protéine Leafy du Ginkgo biloba. Cette protéine est capable de générer des structures poreuses par auto-assemblage. A l'intérieur des tubes, une chaîne peptidique d'environ 30 acides aminés par monomère est présente et servira de plateforme de greffage. Trois systèmes hybrides cristallins avec RuPhot et RuCat seuls ainsi qu’avec une combinaison des deux ont été obtenus. La mise au point des techniques de caractérisation a été faite sur l’hybride RuCat apportant des informations intéressantes sur la cinétique et la sélectivité du greffage ainsi que sur une modification du catalyseur intervenant au cours du greffage. Les études réalisées sur l’hybrides RuPhot ont quant à elles montrées qu’il était possible, comme cela était planifié de greffer plusieurs chromophores par protéine et de pouvoir bénéficier ainsi d’un effet d’antenne pour une efficacité maximisée. Les études catalytiques pour l'oxydation des sulfures et des alcènes sont en cours.Dans un tout autre domaine, 16% de cette thèse a été consacré à un contrat de doctorat conseil auprès de l'entreprise NMRBio. L'objectif était de développer de nouvelles voies de synthèses de composés marqués par des isotopes stables en vue d'études structurales et dynamiques de protéines par RMN
For the last decades the development of sustainable chemistry became a priority for our society. In this context, biocatalysis appears to be an interesting solution, through the use of natural, modified or artificial enzymes consisting of a synthetic catalyst grafted into a protein.In this project, we aim to develop bio-hybrid photocatalysts combining a photosensitizer (RuPhot) and a catalyst (RuCat) within a protein crystal for heterogeneous asymmetric oxidation photocatalysis of organic substrates using water as the only source of oxygen atoms. The selected protein is the oligomerization domain of the Leafy protein of Ginkgo biloba. This protein is able to generate porous structures by self-assembly. Inside the tubes, a peptide chain of about 30 amino acids per monomer is present and it will serve as grafting platform. Three crystalline hybrid systems were obtained with RuPhot and RuCat alone as well as a combination of the two. The characterization was carried out on the RuCat hybrid providing interesting information on the kinetics and selectivity of grafting as well as on a modification of the catalyst during grafting. The studies carried out on the RuPhot hybrids have shown that it was possible, as planned, to graft several chromophores per protein and thus benefit from an antenna effect for maximum efficiency. Catalytic studies for the oxidation of sulphides and alkenes are underway.In a completely different field, 16% of this thesis was devoted to a doctoral consulting contract with the company NMRBio. The objective was to develop new pathways for the synthesis of stable isotope-labelled compounds in order to perform structural and dynamic NMR studies in proteins
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Chukwuchendo, Emmanuel Chukwunonso. "Bio-oxidation of ferrous iron at low temperature conditions in a packed bed column bioreactors." Thesis, Cape Peninsula University of Technology, 2016. http://hdl.handle.net/20.500.11838/2545.

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Thesis (MTech (Chemical Engineering))--Cape Peninsula University of Technology, 2016.
The oxidation of microbial ferrous iron is an important sub-process in the bioleaching process. Several studies focussing on microbial ferrous iron oxidation have been investigated and reported in various studies. These studies were carried out using stirred tank bioreactors and shake flasks at optimum conditions. However, these studies could not describe the context of heap bioleach system. Packed column system may describe heap bioleaching, and most studies on microbial ferrous iron oxidation were performed under flooded conditions, which do not represent solution flow dynamics in a heap situation. Biooxidation of ferrous iron oxidation kinetics of Acidiobacillus ferrooxidans was studied in a packed-bed bioreactor to investigate the kinetics in a system that mimics the solution flow dynamic of a heap bioleach operation at low-temperature conditions. This was done in a batch mode operation, with glass marble (15 mm) as reactor packing. The pH of the bioreactor was maintained at pH 1.35 ± 0.05 and aeration at 500 ml/min. Unstructured models known as Monod and Hansford were used to describe the experimental data in determining the kinetics of bio-oxidation.
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Chandraprabha, M. N. "Studies On Bio-Oxidation A Refractory Gold Containing Sulphidic Concentrate With Respect To Optimization And Modeling." Thesis, Indian Institute of Science, 2000. http://hdl.handle.net/2005/188.

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Although bacterial leaching of sulphidic minerals is a well-known phenomenon, it is only in the last ten years that full-scale bacterial leaching plants have been commissioned for gold processing. In order for bacterial leaching to compete successfully with other pretreatment processes for refractory ores, particularly with established technologies such as roasting and pressure leaching, it needs to be efficient. This requires the optimization of the parameters affecting the leaching reaction and the growth of bacteria. The entire biotreatment process is agitation leaching, carried out in stirred reactors or Pachuca type reactors. The bacterial oxidation is a complex reaction involving gaseous, liquid and solid phases. The interactions are highly complex, and analysis is complicated by the presence of solids in the leaching medium. Inspite of the amount of research that has been performed, kinetic and process models are underdeveloped. Since kinetic data varies widely with the type and source of concentrate, experimental data should be generated before doing the full-scale reactor design. In sizing reactors for a commercial scale process, it would be useful to have a mathematical model that one could use to predict the amount and rate of release of metal, as a function of the various operating parameters of the system. G.R.Halli arsenical gold sulphide concentrate obtained from Hutti Gold Mines Ltd., Karnataka, was chosen for our study, because of its high refractoriness. An indegenous strain of Thiobacillus ferrooxidans was used for biooxidation. The experiments were conducted in a well-agitated stirred tank reactor under controlled conditions. Sparged air was supplemented with carbon-dioxide for optimized growth. In this work, more than 90% gold and 95% silver could be recovered from the sulphidic gold concentrate when bioleaching was used ahead of cyanidation, compared to 40% and 50% by direct cyanidation. A generalized model, which accounts for both direct bacterial attack and indirect chemical leaching, has been proposed for the biooxidation of refractory gold concentrates. The bacterial balance, therefore, accounts for its growth both on solid substrate and in solution, and for the attachment to and detachment from the surface. The overall process is considered to consist of several sub-processes, each of which can be described in terms of a mechanism and related rate expressions. These sub-processes were studied seperately under kinetically controlled conditions. The key parameters appearing in the rate equations were evaluated using the experimental data. Since the refractory concentrate contains pyrite and arsenopyrite as the major leachable entities, leaching studies have been done on pure pyrite and arsenopyrite as test minerals and the key parameters in the rate equations are evaluated using this data. The model so developed is tested with the leaching kinetics of the concentrate. The growth of bacteria is dependent on the availability of the substrate, ferrous iron, and the dependence is modelled by the widely accepted Monod equation. The effect of carbon dioxide supplementation on the bacterial activity was studied and the optimal concentration for growth was found to be l%(v/v). Studies on indirect chemical leaching showed that the rate is sensitive to surface area of concentrate. Indirect rate constant of arsenopyrite was found to be greater than that of pyrite, since pyrite is more nobler than arsenopyrite. Conditions of direct leaching alone was obtained at high pulp density and using substrate adapted bacteria. The rate constant of arsenopyrite was found to be greater than that of pyrite. The parameters obtained were tested with the overall batch leaching data of the concentrate and favourable comparision was obtained. Thus, it has been possible to isolate the various simultaneous sub-processes occurring during the leaching and propose useful models to describe these processes in some detail. The model has been extended successfully to predict the continuous leaching behaviour using the parameters obtained from the batch data. Studies on the effect of residence time and pulp density on steady state behaviour showed that there is a critical residence time and pulp density below which washout conditions occur. The critical residence time at 10% pulp density was found to be 11 hrs. Operation at pulp densities lower than 5% and residence times lower than 72 hrs is not favourable for efficient leaching. Studies on the effect of initial ferric iron concentration showed that there exists an optimum concentration of ferric iron at which the time required to reach steady state is minimum.
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Books on the topic "Bio-oxidation"

1

Spencer, Peter A. Metallurgical considerations in the design of a bio-oxidation plant: A case study for a refractory arsenopyrite concentrate. Warrendale, PA: Minerals, Metals & Materials Society, 1990.

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United States. Dept. of the Army, ed. Wet air oxidation with powdered activated carbon bio-treatment (PACT). [Washington, D.C.?: Dept. of the Army, 1993.

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Syed, Sajid Ahmed. Oxidation studies of surrogate bio-diesel fuels in opposed flow diffusion flames. 2005.

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Yu-Li, Ruth Yeh. Treatment of dye wastewaters by adsorption with and without the bio-oxidation process. 1995.

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Boon, Mieke. Theoretical and experimental methods in the modelling of bio-oxidation kinetics of sulphide Minerals. Mieke Boon, 1996.

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Advances in Wastewater Treatment I. Materials Research Forum LLC, 2021. http://dx.doi.org/10.21741/9781644901144.

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The book presents new materials and methods for waste water treatments; including advanced oxidation processes, membrane technologies, detection and removal of heavy metals and organic compounds, and the use of nanomaterials, low cost adsorbents and bio flocculants.
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Advances in Wastewater Treatment I. Materials Research Forum LLC, 2021. http://dx.doi.org/10.21741/9781644901151.

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The book presents new materials and methods for waste water treatments; including advanced oxidation processes, membrane technologies, detection and removal of heavy metals and organic compounds, and the use of nanomaterials, low cost adsorbents and bio flocculants.
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Fisher, David. Mechanical Properties of MAX Phases. Materials Research Forum LLC, 2021. http://dx.doi.org/10.21741/9781644901274.

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MAX Phase Materials are uniquely structured carbide and nitride materials which combine the rigidity, oxidation-resistance and high-temperature strength of ceramic materials with such metallic properties as good machinability, thermal-shock resistance, damage-tolerance and good transport properties. Potential applications include microelectronic layers, coatings for electrical contacts, thermal shock-resistant refractories, high-temperature heating elements, neutron-irradiation resistant nuclear applications, thermal barriers, protective aerospace coatings, and bio-compatible materials. The book reviews theoretical and experimental research up to early 2021 and references 185 original resources with their direct web links for in-depth reading.
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Hirao, Toshikazu. Functionalized Redox Systems: Synthetic Reactions and Design of π- and Bio-Conjugates. Springer, 2015.

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Hirao, Toshikazu. Functionalized Redox Systems: Synthetic Reactions and Design of π- and Bio-Conjugates. Springer, 2016.

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Book chapters on the topic "Bio-oxidation"

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Dieterich, Larry. "Barr: Bio Anaerobic Reduction and RE-Oxidation." In Contaminated Soil ’95, 1185–86. Dordrecht: Springer Netherlands, 1995. http://dx.doi.org/10.1007/978-94-011-0421-0_66.

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Vilím, J., T. Knaus, and F. G. Mutti. "CHAPTER 6. Bio-catalyzed Aerobic Oxidation Reactions." In Catalysis Series, 131–80. Cambridge: Royal Society of Chemistry, 2020. http://dx.doi.org/10.1039/9781839160332-00131.

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Ho, Ming-Hsun, Shentan Chen, Roger Rousseau, Michel Dupuis, R. Morris Bullock, and Simone Raugei. "Bio-Inspired Molecular Catalysts for Hydrogen Oxidation and Hydrogen Production." In ACS Symposium Series, 89–111. Washington, DC: American Chemical Society, 2013. http://dx.doi.org/10.1021/bk-2013-1133.ch006.

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Lv, Xin, Hongbo Zhao, Yanjun Zhang, Yisheng Zhang, Xiaoyu Meng, Jun Wang, and Guanzhou Qiu. "Review on the Bio-oxidation of Pyrite: Implications for the Mining Industry." In TMS 2020 149th Annual Meeting & Exhibition Supplemental Proceedings, 1309–14. Cham: Springer International Publishing, 2020. http://dx.doi.org/10.1007/978-3-030-36296-6_121.

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Maklyuk, Elena, Ganna Tsygichko, Ruslan Vilnyy, and Alex Mojon. "Regularity of Transformations of Oil-Contaminated Microbial Ecosystems by Super-Oxidation Technology and Subsequent Bio-remediation." In Soil Science Working for a Living, 275–80. Cham: Springer International Publishing, 2017. http://dx.doi.org/10.1007/978-3-319-45417-7_27.

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Hudlicky, T. "Efficient Synthesis of Optically Active Carbohydrates and Other Oxygenated Compounds Through Bio-Oxidation of Chlorinated Aromatics." In Microbial Reagents in Organic Synthesis, 123–34. Dordrecht: Springer Netherlands, 1992. http://dx.doi.org/10.1007/978-94-011-2444-7_10.

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Carvalho, Liliane C., Suzimara R. Silva, Romeu M. N. Giardini, Lucas S. Magalhães, Michael L. M. Rodrigues, and Versiane A. Leão. "Selection of Microorganism for the Bio-Oxidation of a Refractory Gold-Concentrate with Focus on the Behaviour of Antimony Sulphides." In The Minerals, Metals & Materials Series, 1777–86. Cham: Springer International Publishing, 2018. http://dx.doi.org/10.1007/978-3-319-95022-8_147.

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Sharma, Rakesh Kumar, Bhavya Arora, Sriparna Dutta, and Manoj B. Gawande. "Photo-oxidation Technologies for Advanced Water Treatment." In Advanced Nano-Bio Technologies for Water and Soil Treatment, 221–55. Cham: Springer International Publishing, 2020. http://dx.doi.org/10.1007/978-3-030-29840-1_10.

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Sousa, Joao Santos, Pierre-Marie Girard, Evelyne Sage, Jean-Luc Ravanat, and Vincent Puech. "DNA Oxidation by Reactive Oxygen Species Produced by Atmospheric Pressure Microplasmas." In Plasma for Bio-Decontamination, Medicine and Food Security, 107–19. Dordrecht: Springer Netherlands, 2011. http://dx.doi.org/10.1007/978-94-007-2852-3_9.

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Florea, Mihaela, and Vasile I. Parvulescu. "Selective Oxidation of Biomass Constitutive Polymers to Valuable Platform Molecules and Chemicals." In Chemicals and Fuels from Bio-Based Building Blocks, 379–402. Weinheim, Germany: Wiley-VCH Verlag GmbH & Co. KGaA, 2016. http://dx.doi.org/10.1002/9783527698202.ch15.

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Conference papers on the topic "Bio-oxidation"

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Fei, Qingzhi, Zhi Xu, and Xiaoxu Liu. "Studies on the Effects of Different Bio-Media on Bio-Contact Oxidation Reactor." In 2008 2nd International Conference on Bioinformatics and Biomedical Engineering (ICBBE '08). IEEE, 2008. http://dx.doi.org/10.1109/icbbe.2008.1064.

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Zhu, Lingfeng, Ruqi Gao, Zhaoyao Zhang, and Jing Chen. "Study on Bio-Contact Oxidation Techniques in Rives Remediation." In 2010 4th International Conference on Bioinformatics and Biomedical Engineering (iCBBE 2010). IEEE, 2010. http://dx.doi.org/10.1109/icbbe.2010.5517484.

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Karlsson, Erik A., Bao-Lin Lee, Torbjörn Åkermark, Eric V. Johnston, Markus D. Kärkäs, Junliang Sun, Örjan Hansson, Jan-E. Bäckvall, and Björn Åkermark. "Photosensitized Water Oxidation Using a Bio-Inspired Manganese Catalyst." In 14th Brazilian Meeting on Organic Synthesis. São Paulo: Editora Edgard Blücher, 2013. http://dx.doi.org/10.5151/chempro-14bmos-r0189-1.

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Dagaut, Philippe, and Sandro Gai¨l. "Kinetics of Gas Turbine Liquid Fuels Combustion: Jet-A1 and Bio-Kerosene." In ASME Turbo Expo 2007: Power for Land, Sea, and Air. ASMEDC, 2007. http://dx.doi.org/10.1115/gt2007-27145.

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The oxidation of kerosene and bio-kerosene (kerosene-rapeseed oil methyl esters 80/20 in mole) was studied experimentally in a jet-stirred reactor at 10 atm and constant residence time, over the high temperature range 740-1200 K, and for variable equivalence ratios in the range 0.5–1.5. Concentration profiles of reactants, stable intermediates, and final products were obtained by probe sampling followed by on-line and off-line GC analyses. The oxidation of these fuels in these conditions was modeled using a detailed kinetic reaction mechanism consisting of 2027 reversible reactions and 263 species. The surrogate bio-kerosene model-fuel used consisted of a mixture of n-hexadecane, n-propylcyclohexane, n-propylbenzene, and n-decane. For bio-kerosene, the methyl ester fraction was simply represented by n-hexadecane. The proposed kinetic reaction mechanism used in the modeling yielded a good representation of the kinetics of oxidation of kerosene and bio-kerosene under JSR conditions. The data and the model showed the bio-kerosene (Jet A-1/RME mixture) has a slightly higher reactivity than Jet A-1 whereas not major modification of the products distribution was observed besides the formation of small methyl esters from RME’s oxidation.
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Catalanotti, E., K. J. Hughes, M. Pourkashanian, I. Uryga-Bugajska, and A. Williams. "Development of a High Temperature Oxidation Mechanism for Bio-Aviation Fuels." In ASME 2008 International Mechanical Engineering Congress and Exposition. ASMEDC, 2008. http://dx.doi.org/10.1115/imece2008-68667.

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Almost all current civil and military aviation around the world use a kerosene-type fuel. However one of the alternatives is to use a mixture of petrochemicals and biofuel, especially methyl esters derived from vegetable oil (Fatty Acid Methyl Esters, FAMEs) that given their properties appear to be one of the most suitable for Aviation fuels. Studies were conducted to develop a fundamental and detailed reaction mechanism for the combustion of bio-aviation fuel through a combination of the existing kerosene based reaction mechanism developed previously by the authors (Aviation Fuel Reaction Mechanism v1.1), along with published chemical kinetic mechanisms for methylbutanoate (MB). Methylbutanoate is the simplest FAME that exhibits similar patterns of reactivity to FAME’s of longer carbon chain length typical of those derived from vegetable oils, furthermore it has been the subject of several studies to provide chemical kinetic mechanisms to predict its oxidation behavior. Evaluations of the combined reaction mechanism have been performed using CHEMKIN™ and similar software simulating high temperature/pressure conditions. A comparison between the oxidation processes of the Kerosene and Bio-Aviation fuel was carried out, along with sensitivity analysis to provide insight into some of the differences observed. A similar behaviour was observed for blends of 20%MB/80%Kerosene in the combustion conditions studied, indicating that combustion in current aircraft engines would not be adversely affected by using such a blend.
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Zhu, Lingfeng, Ruqin Gao, Zhaorao Zhang, and Le Zhang. "Research on Combined Packing Treating Domestic Wastewater in Bio-Contact Oxidation Technology." In 2010 4th International Conference on Bioinformatics and Biomedical Engineering (iCBBE). IEEE, 2010. http://dx.doi.org/10.1109/icbbe.2010.5518287.

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Niu, Zhi-Guang, Jia-Qi Bai, Zi-Ming Mi, Ying Zhang, Jie Sun, and Fang Wang. "Application of bio-contact oxidation process as pretreatment technology to constructed wetland." In 2011 International Conference on Electric Technology and Civil Engineering (ICETCE). IEEE, 2011. http://dx.doi.org/10.1109/icetce.2011.5776213.

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Shafagh, Ida, Kevin J. Hughes, Elena Catalanotti, Zhen Liu, Mohamed Pourkashanian, and Chris W. Wilson. "Experimental and Modelling Studies of the Oxidation of Surrogate Bio-Aviation Fuels." In ASME 2011 Turbo Expo: Turbine Technical Conference and Exposition. ASMEDC, 2011. http://dx.doi.org/10.1115/gt2011-45982.

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Jet fuels currently in use in the aviation industry are exclusively kerosene-based. However, potential problems regarding security of supply, climate change and increasing cost are becoming more significant, exacerbated by the rapidly growing demand from the aviation sector. Biofuels are considered one of the most suitable alternatives to petrochemical-based fuels in the aviation industry in the short to medium term, since blends of biofuel and kerosene provide a good balance of properties currently required from an aviation fuel. Experimental studies at a variety of stoichiometries using a flat flame burner with kerosene and kerosene/biofuel blends have been performed with product analysis by gas sampling and laser induced fluorescence detection of OH, CO and CO2. These studies have been complemented by modelling using the PREMIX module of Chemkin to provide insights into and to validate combined models describing the oxidation chemistry of surrogate fuels depicting kerosene, fatty acid methyl ester biofuels and Fischer-Tropsch derived fuels. Sensitivity analysis has identified important reactions within these schemes which where appropriate have been investigated by molecular modelling techniques available within GAUSSIAN 03.
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Zhu, Lingfeng, Yiping Guo, Ruqin Gao, Caili Su, and Yangyang Wang. "Notice of Retraction: Factors Optimization of Bio-Contact Oxidation Techniques in River Remediation." In 2011 5th International Conference on Bioinformatics and Biomedical Engineering. IEEE, 2011. http://dx.doi.org/10.1109/icbbe.2011.5781148.

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Jiang, Shan-Quan, Xiang-Wei Sun, Li-Xing Ling, Chun-Yan Zhong, Yue Hu, Shi-Hong Cheng, and Wu-Feng Wu. "Comparative Trial on Biological Contact Oxidation and Bio-filter Process for Wastewater Treatment." In 2nd Annual International Conference on Advanced Material Engineering (AME 2016). Paris, France: Atlantis Press, 2016. http://dx.doi.org/10.2991/ame-16.2016.185.

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Reports on the topic "Bio-oxidation"

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Coates, John D. Uranium Immobilization through Fe(II) bio-oxidation: A Column study. Office of Scientific and Technical Information (OSTI), September 2009. http://dx.doi.org/10.2172/1122941.

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Coates, John D. Immobilization of Radionuclides Through Anaerobic Bio-oxidation of Fe(ll). Office of Scientific and Technical Information (OSTI), June 2005. http://dx.doi.org/10.2172/893579.

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Coates, John D. Immobilization of Radionuclides Through Anaerobic Bio-oxidation of Fe(ll). Office of Scientific and Technical Information (OSTI), June 2006. http://dx.doi.org/10.2172/896803.

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Coates, John D. Anaerobic U(IV) Bio-oxidation and the Resultant Remobilization of Uranium in Contaminated Sediments. Office of Scientific and Technical Information (OSTI), June 2005. http://dx.doi.org/10.2172/893580.

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Paul Fallgren. Innovative Protocols for in SITU MTBE Degradation by Using Molecular Probes-An Enhanced Chemical-Bio Oxidation Technique. Office of Scientific and Technical Information (OSTI), February 2009. http://dx.doi.org/10.2172/993521.

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