Relevant bibliographies by topics / Biosorption sites

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Academic literature on the topic 'Biosorption sites'

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

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Journal articles on the topic "Biosorption sites"

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Parvathi, K., R. Nareshkumar, and R. Nagendran. "MANGANESE BIOSORPTION SITES OFSACCHAROMYCES CEREVISIAE." Environmental Technology 28, no. 7 (July 2007): 779–84. http://dx.doi.org/10.1080/09593332808618833.

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Fu, Yuzhu, and T. Viraraghavan. "Dye biosorption sites in Aspergillus niger." Bioresource Technology 82, no. 2 (April 2002): 139–45. http://dx.doi.org/10.1016/s0960-8524(01)00172-9.

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Kapoor, Anoop, and T. Viraraghavan. "Heavy metal biosorption sites in Aspergillus niger." Bioresource Technology 61, no. 3 (September 1997): 221–27. http://dx.doi.org/10.1016/s0960-8524(97)00055-2.

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Tsezos, M., E. Remoudaki, and V. Angelatou. "Biosorption sites of selected metals using electron microscopy." Comparative Biochemistry and Physiology Part A: Physiology 118, no. 3 (November 1997): 481–87. http://dx.doi.org/10.1016/s0300-9629(97)00009-1.

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Lee, Yi Chao, Shui Ping Chang, Chih Sheng Lee, and Nien Hsin Kao. "Influence of Pigment Extraction on Pb(II) Biosorption of Cladophora and Spirogyra Algae Powder." Advanced Materials Research 610-613 (December 2012): 3591–98. http://dx.doi.org/10.4028/www.scientific.net/amr.610-613.3591.

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The Cladophora and Spirogyra genera are classified within the green algae division. Species belonging to these genera comprise large filamentous algae, possess significant biomass, and are found in freshwater around the world. These characteristics give Cladophora and Spirogyra high potential to be developed as biological materials. For this study, we harvested fresh Cladophora and Spirogyra and produced algae powder using two of conventional procedures: with pigment extraction and without pigment extraction. The resulting algae powders were subjected to Pb(II) biosorption, and the differences in biosorption rates were subsequently analyzed. Our study found the following: (i) significant differences in cell structure, cell wall thickness, the type and content of cell composition, and the quantity of epiphytes between Cladophora and Spirogyra. This variation influenced the functional groups within the resulting algae powders and their binding sites, which further led to different levels of Pb(II) adsorption. (ii) Glacial acetic acid, a compound commonly employed in pigment extraction procedures, affected the functional groups and the binding sites of the resulting algae powders. For Cladophora algae powder, Pb(II) biosorption was reduced by 16.6 %; whereas for Spirogyra algae powder, Pb(II) biosorption was reduced by 19.8 %. (iii) The pigment extraction procedure exerted the most significant influence on the carbonyl groups and hydroxyl groups in algae powder. (iv) The pigment extraction procedure is not suitable for the preparation of algae powders which will be used for metal ion biosorption.
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Zinicovscaia, Inga, Nikita Yushin, Daler Abdusamadzoda, Dmitrii Grozdov, and Margarita Shvetsova. "Efficient Removal of Metals from Synthetic and Real Galvanic Zinc–Containing Effluents by Brewer’s Yeast Saccharomyces cerevisiae." Materials 13, no. 16 (August 16, 2020): 3624. http://dx.doi.org/10.3390/ma13163624.

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The performance of the brewer’s yeast Saccharomyces cerevisiae to remove metal ions from four batch systems, namely Zn(II), Zn(II)-Sr(II)-Cu(II), Zn(II)-Ni(II)-Cu(II), and Zn(II)-Sr(II)-Cu(II)-Ba(II), and one real effluent was evaluated. Yeast biosorption capacity under different pH, temperature, initial zinc concentration, and contact time was investigated. The optimal pH for removal of metal ions present in the analyzed solution (Zn, Cu, Ni, Sr, and Ba) varied from 3.0 to 6.0. The biosorption process for zinc ions in all systems obeys Langmuir adsorption isotherm, and, in some cases, the Freundlich model was applicable as well. The kinetics of metal ions biosorption was described by pseudo-first-order, pseudo-second-order, and Elovich models. Thermodynamic calculations showed that metal biosorption was a spontaneous process. The two-stage sequential scheme of zinc ions removal from real effluent by the addition of different dosages of new sorbent allowed us to achieve a high efficiency of Zn(II) ions removal from the effluent. FTIR revealed that OH, C=C, C=O, C–H, C–N, and NH groups were the main biosorption sites for metal ions.
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Lu, Wenlong, Yifeng Xu, Chuanzhou Liang, Baba Imoro Musah, and Lai Peng. "Simultaneous Biosorption of Arsenic and Cadmium onto Chemically Modified Chlorella vulgaris and Spirulinaplatensis." Water 13, no. 18 (September 11, 2021): 2498. http://dx.doi.org/10.3390/w13182498.

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The biosorption behaviour of arsenic(V) and cadmium(II) ions by unmodified and five types of chemically modified Chlorella vulgaris and Spirulina platensis was investigated. The biosorption rates of As(V) and Cd(II) in binary metal solutions were lower than those in sole metal systems, which exhibited a competition between As(V) and Cd(II) ions to occupy the active sites of the adsorbent. Among the five chemical reagents, NaCl and ZnCl2 were the most suitable modifiers for improving the biosorption performance of C. vulgaris and S. platensis, respectively. The maximum biosorption capacities of As(V) and Cd(II) were: (a) 20.9 and 1.2 mg/g, respectively, for C. vulgaris modified with NaCl; (b) 24.8 and 29.4 mg/g, respectively, for S. platensis modified with ZnCl2, which were much higher than those using other chemically modifying methods. The pseudo-second-order kinetic model fitted well with all the biosorption processes. The SEM analysis revealed that the modification changed the surface morphologies and enhanced the porosity of the algae biomass. The FTIR analysis established the presence of diverse groups of compounds that were largely hydroxyl, carboxylate, amino, and amide groups on the adsorbents that contributed significantly to the upregulated biosorption. This work showed the potential application of chemically modified C. vulgaris and S. platensis biomasses to effectively remove both from water.
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Xiao, Jun, Miyamoto Chikanori, Ke-Feng Yu, Seki Hideshi, Maruyama Hideo, and Pei-Min He. "Biosorption of heavy metals onto nonliving Laminaria japonica." Water Science and Technology 65, no. 8 (April 1, 2012): 1514–20. http://dx.doi.org/10.2166/wst.2012.042.

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In this paper, study of the biosorption of Cd2+ and Pb2+ by nonliving Laminaria japonica in a batch adsorption system is described. The content of acidic sites and the dissociation constant of carboxylic acid functional groups (metal-binding site) of L. japonica were experimentally determined by conductometric and potentiometric titrations and theoretically predicated by using monodentate and bidentate binding models. The models are based on the monodentate or bidentate binding reactions of bivalent metal ions to acidic sites. The acidic site content and carboxylic acid dissociation constants determined are 1.25 and 0.18 mmol L−1, respectively. The results showed that the bidentate adsorption model fits well the biosorption of bivalent metal ions onto L. japonica with the bidentate binding constants for Cd2+ and Pb2+ being 5.72 × 103 and 6.24 × 104 L mol−1, respectively. The adsorption process of L. japonica followed the pseudo-second-order kinetics.
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Timková, Ivana, Jana Sedláková-Kaduková, and Peter Pristaš. "Biosorption and Bioaccumulation Abilities of Actinomycetes/Streptomycetes Isolated from Metal Contaminated Sites." Separations 5, no. 4 (November 12, 2018): 54. http://dx.doi.org/10.3390/separations5040054.

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Heavy metal pollution is of great concern. Due to expansion of industrial activities, a large amount of metal is released into the environment, disturbing its fragile balance. Conventional methods of remediation of heavy metal-polluted soil and water are expensive and inefficient. Therefore, new techniques are needed to provide environmentally friendly and highly selective remediation. Streptomycetes, with their unique growth characteristics, ability to form spores and mycelia, and relatively rapid colonization of substrates, act as suitable agents for bioremediation of metals and organic compounds in polluted soil and water. A variety of mechanisms could be involved in reduction of metals in the environment, e.g., sorption to exopolymers, precipitation, biosorption and bioaccumulation. Studies performed on biosorption and bioaccumulation potential of streptomycetes could be used as a basis for further development in this field. Streptomycetes are of interest because of their ability to survive in environments contaminated by metals through the production of a wide range of metal ion chelators, such as siderophores, which provide protection from the negative effects of heavy metals or specific uptake for specialized metabolic processes. Many strains also have the equally important characteristic of resistance to high concentrations of heavy metals.
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Chang, Shui Ping, Yi Chao Lee, Chih Sheng Lee, and Nien Hsin Kao. "Using Gin Adsorption Model for Assessing the Influence of Algal Powder Bleach Process in Cu(II) Adsorption." Applied Mechanics and Materials 295-298 (February 2013): 123–28. http://dx.doi.org/10.4028/www.scientific.net/amm.295-298.123.

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The Cladophora and Spirogyra algae examined in this study belong to the Chlorophyta division. Macro filamentous algae, which are widespread in fresh water worldwide, have high potential to be developed as biological materials because of their large biomass and availability. In this study, we collected fresh algae from where they grew and produced bleached and unbleached algae powder using to adsorb Cu(II) ion solution. After the biosorption process, we noted the following four significant findings: (i) The functional groups and binding sites in the produced algae powder were affected, causing variations in the amount of copper adsorbed. The variations resulted from differences in the cell structure, the cell wall thickness of Cladophora and Spirogyra algae, cell composition, and the types and amount of epiphytic algae. (ii) Common bleaching procedures using glacial acetic acid influenced the binding sites of the functional groups and the biomass of the produced powder. Because of the bleaching, the amount of copper adsorbed by the Cladophora powder declined by 14.2%, and by 15.7% for Spirogyra powder. (iii) The carbonyl and hydroxyl groups of unbleached powder were the main elements affected during the bleaching procedures. Examining whether the biosorption experiment results fit Gin’s biosorption model, we found that the biosorption amount and equilibrium reaction of the two bleached algae powders were inferior to that of the unbleached algae powders. (iv) The bleaching procedure using glacial acetic acid was not suitable for producing algae powder to use as an adsorbent for metal ions.
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Dissertations / Theses on the topic "Biosorption sites"

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Kaya, Levent. "Biosortion Sites For Lead [pb (ii)] In Phanerochaete Chrysosporium." Master's thesis, METU, 2004. http://etd.lib.metu.edu.tr/upload/2/12605494/index.pdf.

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Biosorption is a phenomenon involving the mechanisms that basically mediate heavy metal tolerance of microorganisms as well as sequestration of heavy metals from environment. Different classes of microorganisms have different biosorption capacities, as a result of the differences in composition and types of functional groups found on cell surfaces. The present study was undertaken to identify the molecular mechanisms for lead [Pb(II)] biosorption in the white-rot fungus, Phanerochaete chrysosporium. The methodology involved selective blocking of the functional groups known to participate in heavy metal biosorption and allowed us to determine their relative roles in Pb (II) biosorption in this organism. The relative concentrations of the Pb (II) sorbed from the aqueous environment and Mg2+ and Ca2+ ions released to the aqueous environment were measured and compared with both native and chemically-modified biomasses by using atomic absorption spectroscopy. Fourier-Transform Infrared (FTIR) spectroscopy technique was used to monitor and analyze the molecular-level changes in both native and chemically modified cell surfaces upon Pb (II) exposure. Interactions of Pb (II) with the biomass surface was determined by observing the changes in wavenumber and absorbance of NH stretching and Amide I bands arising from the amine groups and C=O stretching band arising from the carboxyl groups. The roles of phosphate groups and lipids were also investigated. Carboxyl groups seemed to be the most important functional groups for Pb (II) biosorption in P. chrysosporium, since the biosorption capacity dramatically decreased (by 92.8 %) in carboxyl groups-blocked biomass. Amine groups were found to play a secondary and minor role in Pb (II) biosorption, only a slight decrease (6 %) in Pb (II) biosorption was detected with amine groups-blocked biomass. Blocking of phosphate groups provided a small increase in biosorptive capacity and did not appear to have much significant role in biosorption. Upon chemical treatment with acetone to extract lipids of the cell surfaces, an increase of 20.3 % in the Pb (II) biosorptive capacity was determined. It was concluded that carbonyl and carboxyl groups of chitin and glucan are the major sites and ion exchange via these groups is the main mechanism for Pb (II) biosorption in P. chrysosporium.
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Jauberty, Loïc. "Adsorption des radionucléides en solution par les écorces forestières : obtention et mise en oeuvre d'un agro-matériau sur un ancien site minier uranifère." Limoges, 2011. http://www.theses.fr/2011LIMO4055.

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Ce travail démontre qu’un matériau naturel tel que l’écorce d’origine forestière peut efficacement se substituer aux résines échangeuses d’ions synthétiques dans des procédés industriels de dépollution des eaux contaminées par des éléments traces métalliques (ETM). Un tel procédé, qualifié de biosorption, a été plus particulièrement étudié dans le cas de l’uranium. Des essais préliminaires réalisés en condition de laboratoire ont été conduits en batch sur des écorces de Douglas préalablement activées. Les conditions physico-chimiques optimales du processus de biosorption tout comme sa modélisation mathématique selon les isothermes de Langmuir ont ensuite été étudiées. Les résultats obtenus permettent d’estimer notamment les valeurs de capacité maximale d’adsorption (qmax) et d’affinité (b) qui, dans le cas de l’uranium, s’établissent respectivement à 1,25 méq/g (soit 149 mg U/g) et 8,3 L/méq. Tout d’abord développé à l’échelle du laboratoire, le procédé a été transféré à l’échelle préindustrielle en partenariat avec la société Pe@rl. Dans ce cas, des essais menés sur un ancien site minier de la société AREVA NC (site de Margnac-Pény, Haute-Vienne) confirment les performances du système. Les données recueillies à cette occasion sont par ailleurs cohérentes avec celles qui sont issues de l’exploitation du logiciel de simulation CHESS, ce qui nous permet d’envisager l’optimisation de l’exploitation industrielle du procédé de biosorption. Enfin, nos travaux démontrent que les écorces peuvent être modifiées chimiquement par oxydation ou greffage de sites d’adsorption spécifiques, augmentant ainsi leurs capacités maximales d’adsorption tout comme leurs affinités vis-à-vis de l’uranium
This work shows that a natural material such as forest bark can effectively substitute for synthetic ion exchange resins for industrial water pollution control. Such a process, named biosorption, was particularly studied in the case of uranium. It was first characterized in batch condition with activated Douglas fir barks. Optimal physicochemical conditions of biosorption process as well as its mathematical modelling through Langmuir isotherms were then studied. The results led to the evaluation of the maximal adsorption capacity (qmax) and affinity (b) that, for uranium, reaches 1. 25 meq/g (149 mg U/g) and 8. 3 L/meq respectively. First developed at the laboratory scale, this technology was, thanks to the support of the Pe@rl Company, transferred and tested through a pilot project under industrial conditions with contribution of AREVA NC (division minière at Margnac Pény, Haute-Vienne, France). Data collected during experiments were found to be in accordance with those obtained with the CHESS simulation software, which allows us to consider an optimization of the biosorption process at the industrial scale. Finally, our work shows that chemical modification of barks, either by oxidation or grafting of specific adsorption sites, results in increases of their maximum adsorption capacities as well as their affinities for uranium
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Carvajal, Denny A. "Understanding the Role of the Bacteria, Isolated from the Hanford Site Soil, on the Fate and Transport of Uranium." FIU Digital Commons, 2011. http://digitalcommons.fiu.edu/etd/459.

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Bacteria are known for their abilities to influence the geochemical processes and affect the mobility of contaminants in the subsurface. Arthrobacter strain G975 was studied to improve our understanding of their effect on uranium’s fate and transport. The research experimentally identified and compared several parameters, including cell growth rate, cell viability, and the bacteria partition coefficient, Kd, under various uranium and bicarbonate concentrations mimicking Hanford Site subsurface environmental conditions, as well as the microbes ability to interact with uranyl phosphate minerals. The results show that the G975 strain can uptake up to 90% of the U(VI) concentrations tested, following linear isotherm models whose uptake capacity was measured up to 150.2 ± 71.4 mg/g and decreased with increasing bicarbonate concentrations. AFM and SEM/EDS analysis confirmed surface membrane uranium precipitates. The research presented here is part of a large effort to advance the understanding of the biogeochemistry processes and plausible remediation strategies concerning uranium contamination.
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Book chapters on the topic "Biosorption sites"

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Kotrba, Pavel, Lubomír Rulíšek, and Tomas Ruml. "Bacterial Surface Display Surface display of Metal-Binding Sites." In Microbial Biosorption of Metals, 249–83. Dordrecht: Springer Netherlands, 2011. http://dx.doi.org/10.1007/978-94-007-0443-5_11.

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Roux, J.-Cl, E. Fourest, and Cl Sahut. "Normative Aspects Biosorption: Is it Necessary to Standardize a Protocol for Comparing Biosorbents ?" In Biotechnology for Waste Management and Site Restoration, 141–46. Dordrecht: Springer Netherlands, 1997. http://dx.doi.org/10.1007/978-94-009-1467-4_17.

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Pérez, R. Maria, A. Abalos, José Manuel Gómez, and Domingo Cantero. "Biosorption of Heavy Metals by Pseudomonas aeruginosa Isolated from a Petroleum Contaminated Site." In Advanced Materials Research, 615–18. Stafa: Trans Tech Publications Ltd., 2007. http://dx.doi.org/10.4028/0-87849-452-9.615.

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Babu, Neelesh, Vinay Mohan Pathak, Akash, and Navneet. "Biosorption of Heavy Metals." In Biotechnology, 1898–909. IGI Global, 2019. http://dx.doi.org/10.4018/978-1-5225-8903-7.ch077.

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Large-scale production of commodities for mankind by industries did huge damage to the environment. Industrial waste contains lots of toxic materials including heavy metals were drained to water bodies like river, lakes, ponds, etc. These effluents drastically ruin water quality as well as the soil fertility. Type of industry and its raw material decides quantity and quality of the emerged wastes including both biodegradable as well as non-biodegradable. Among non-biodegradable wastes, copper, chromium, nickel, cadmium, etc. are widespread contaminants of soil, water, and these are most common heavy metals. Several heavy metals such as cadmium, mercury, and lead are highly poisonous and fatal to human as well as animals. Several plants as well as microbes respond to heavy metals by diverse biological processes like biosorption to their cell wall and entrapment in their capsule, oxidation and reduction, precipitation, complexation, etc. These responses may help significantly in the remediation of heavy metals from the contaminated sites.
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Babu, Neelesh, Vinay Mohan Pathak, Akash, and Navneet. "Biosorption of Heavy Metals." In Handbook of Research on Microbial Tools for Environmental Waste Management, 270–81. IGI Global, 2018. http://dx.doi.org/10.4018/978-1-5225-3540-9.ch013.

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Large-scale production of commodities for mankind by industries did huge damage to the environment. Industrial waste contains lots of toxic materials including heavy metals were drained to water bodies like river, lakes, ponds, etc. These effluents drastically ruin water quality as well as the soil fertility. Type of industry and its raw material decides quantity and quality of the emerged wastes including both biodegradable as well as non-biodegradable. Among non-biodegradable wastes, copper, chromium, nickel, cadmium, etc. are widespread contaminants of soil, water, and these are most common heavy metals. Several heavy metals such as cadmium, mercury, and lead are highly poisonous and fatal to human as well as animals. Several plants as well as microbes respond to heavy metals by diverse biological processes like biosorption to their cell wall and entrapment in their capsule, oxidation and reduction, precipitation, complexation, etc. These responses may help significantly in the remediation of heavy metals from the contaminated sites.
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Reports on the topic "Biosorption sites"

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Myneni, Satish C., Bhoopesh Mishra, and Jeremy Fein. Role of Sulfhydryl Sites on Bacterial Cell Walls in the Biosorption, Mobility and Bioavailability of Mercury and Uranium. Office of Scientific and Technical Information (OSTI), April 2009. http://dx.doi.org/10.2172/1111104.

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Myneni, Satish C. B., Jeremy Fein, and Bhoopesh Mishra. Role of Sulfhydryl Sites on Bacterial Cell Walls in the Biosorption, Mobility and Bioavailability of Mercury and Uranium. Office of Scientific and Technical Information (OSTI), September 2016. http://dx.doi.org/10.2172/1325258.

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