Consulta: subjectFacets:"Biosorption"
Registros recuperados: 22
Data/hora: 12/06/2024 01:30:41

Biosorption of uranium from aqueous solutions by nonliving biomass of marinealgae Cystoseira indica
Provedor de dados: 69
Autores: Hassan Khani,Mohammad; Reza Keshtkar,Ali; Meysami,Behrouz; Firouz Zarea,Mohammad; Jalali,Reza.
Biosorption of heavy metals can be an effective process for the removal and recovery of heavy metal ions from aqueous solutions. In this paper uranium biosorption by protonated, Ca-pretreated and non-pretreated Cystoseira indica algae biomass was investigated in a batch system. The results of the kinetic studies showed that the sorption of uranium on protonated and non-pretreated biomass followed pseudo-second order kinetics. The effect of pH on the equilibrium uranium sorption capacity of Cystoseira indica exhibited that highest uptake occurred at pH 4 at a solution with 350 mg/l uranium concentration. At various initial uranium concentrations from 50 to 1000 mg/l, batch sorption equilibrium at 30&amp;ordm;C was reached within 3 hrs and the sorption...
Tipo: Journal article
Palavras-chave: Biosorption; Cystoseira indica; Equilibrium; Kinetic; Marine algae; Uranium.
Ano: 2006
URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0717-34582006000200003

Effects of biosorption parameter: kinetics, isotherm and thermodynamics for Ni(II) biosorption from aqueous solution by Circinella sp.
Provedor de dados: 69
Autores: Alpat,Senol; Alpat,Sibel Kilinç; Çadirci,Bilge Hilal; Özbayrak,Özge; Yasa,Ihsan.
Circinella sp. was employed as a biosorbent for removal of Ni(II) from aqueous solution. The biosorption kinetics and isotherms were investigated. The effect of several parameters, such as biosorbent dosage, contact time, initial concentration, pH and temperature, on biosorption process was evaluated. The kinetic studies indicated that the biosorption followed pseudo-second order kinetic model. Biosorption behaviour of Ni(II) on Circinella sp. was expressed by both Langmuir and Freundlich isotherms. The equilibrium data fit better to the Langmuir model compared to the Freundlich model in concentration range studied (1.0-3.0 mM). The thermodynamic parameters (&amp;#916;G0, &amp;#916;H0 and &amp;#916;S0) were also determined, and it was found that the Ni(II)...
Tipo: Journal article
Palavras-chave: Biosorption; Circinella sp; Equilibrium; Kinetic; Nickel.
Ano: 2010
URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0717-34582010000500004

Biosorption of lead by the brown seaweed Sargassum filipendula - batch and continuous pilot studies
Provedor de dados: 69
Autores: Mesquita Vieira,Denise; Augusto da Costa,Antonio Carlos; Assumpção Henriques,Cristiane; Luiz Cardoso,Vicelma; Pessôa de França,Francisca.
The biosorption of lead by the brown alga Sargassum filipendula was studied. pH 4.0 was the optimum value for the biosorption of lead. Isotherms indicated that for solutions containing 0.03 ± 0.001 up to 3.27 ± 0.04 mmol/L of lead, 2.0g/L was the optimum biomass concentration. The Langmuir model was fitted to represent the experimental data, and the kinetics of biosorption presented equilibrium in 30 min. The continuous system operated for 56 hrs presenting a 100% binding of ionic lead, which corresponds to an accumulation of 168 g lead, equivalent to a load of 1.7 mmol ionic lead/g Sargassum filipendula. The results that were obtained in a continuous system showed a gradual saturation of the biomass in the reactors
Tipo: Journal article
Palavras-chave: Biosorption; Biosorption equilibrium continuous system lead Sargassum filipendula.
Ano: 2007
URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0717-34582007000300004

Equipment design for biosorption studies with microorganisms
Provedor de dados: 69
Autores: Jensen,Thomas E; Crang,Mary C; Crang,Richard F.E.
Two laboratory devices have been designed for experimental use in biosorption studies involving the uptake and controlled release of elements from encapsulated living cells of microorganisms. The first device is an alginate bead maker capable of producing uniform (1.5 mm diameter) sodium alginate beads with encapsulated microorganisms. The second device is a flow-cell that can subject the encapsulated microorganisms to changing fluids, streaming gaseous microaerophyllic conditions, and which also allows for samples of fluid and beads to be extracted at any time during changing experimental conditions. Both devices are novel and simple in their design, and enable improved accuracy and precise handling of encapsulated specimens with minimal labour and...
Tipo: Journal article
Palavras-chave: Bead maker; Biosorption; Flow-cell; Sodium alginate.
Ano: 2008
URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0717-34582008000400014

Heavy metal uptake by agro based waste materials
Provedor de dados: 69
Autores: Qaiser,Suleman; Saleemi,Anwar R; Mahmood Ahmad,Muhammad.
Presence of heavy metals in the aquatic systems has become a serious problem. As a result, there has been a great deal of attention given to new technologies for removal of heavy metal ions from contaminated waters. Biosorption is one such emerging technology which utilized naturally occurring waste materials to sequester heavy metals from industrial wastewater. The aim of the present study was to utilize the locally available agricultural waste materials for heavy metal removal from industrial wastewater. The wastewater containing lead and hexavalent chromium was treated with biomass prepared from ficus religiosa leaves. It was fund that a time of one hr was sufficient for sorption to attain equilibrium. The equilibrium sorption capacity after one hr was...
Tipo: Journal article
Palavras-chave: Biosorption; Ficus religiosa leaves; Hexavalent chromium; Kinetics; Lead; Wastewater.
Ano: 2007
URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0717-34582007000300008

Biosorption of lead(II) and chromium(VI) on groundnut hull: Equilibrium, kinetics and thermodynamics study
Provedor de dados: 69
Autores: Qaiser,Suleman; Saleemi,Anwar R; Umar,Muhammad.
The biosorption of lead(II) and chromium(VI) on groundnut hull was investigated. Batch biosorption experiments were conducted to find the equilibrium time and biosorption capacity. Effect of parameters like pH, temperature and initial metal concentration was studied. The maximum biosorption capacity of lead(II) and chromium(VI) was found to be 31.54 ± 0.63 and 30.21 ± 0.74 mg g-1, respectively. The optimum pH for lead(II) and chromium(VI) removal was 5 ± 0.1 and 2 ± 0.1, respectively. The temperature change, in the range of 20 - 45ºC affected the biosorption capacity. The maximum removal of lead(II) was achieved at 20 ± 2ºC, where as maximum uptake of chromium(VI) was observed at 40 ± 2ºC. The biosorption data was fitted to the Langmuir and the Freundlich...
Tipo: Journal article
Palavras-chave: Biosorption; Equilibrium; Groundnut hull; Kinetics; Thermodynamics.
Ano: 2009
URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0717-34582009000400003

Dynamic Cr(III) uptake by Macrocystis pyrifera and Undaria pinnatifida biomasses
Provedor de dados: 69
Autores: Plaza Cazón,Josefina; Viera,Marisa; Donati,Edgardo.
Background: The increased industrial activity has resulted in the discharge of large amount of pollutants including non-degradable metals into the environment. Chromium is produced in several industrial processes and it can be found in the environment in two stable oxidation states, Cr(VI) and Cr(III). Cr(VI) is more hazardous due to its carcinogenic and mutagenic effects on living organisms. Although much less toxic, Cr(III) can also exert genotoxic effects under prolonged or severe exposure. It can be separated from the solution by precipitation but biosorption using brown algae seems to be an effective and sustainable treatment technique owing to its cost-effectiveness and environmental friendly characteristics. Macrocystis pyrifera and Undaria...
Tipo: Journal article
Palavras-chave: Biosorption; Brown algae; Chromium; Heavy metals.
Ano: 2013
URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0717-34582013000300006

Effects of temperature on the sorption of Pb2+ and Cd2+ from aqueous solution by Caladium bicolor (Wild Cocoyam) biomass
Provedor de dados: 69
Autores: Horsfall Jnr,Michael; Spiff,Ayebaemi I.
This report is based on the investigation of the effect of temperature on the removal of Pb2+ and Cd2+ in aqueous effluent using C. bicolor biomass in a batch sorption process. The result showed that the most suitable sorption temperature was 40ºC with maximum sorption capacities of 49.02 mg/g and 52.63 mg/g for Pb2+ and Cd2+ respectively. Various thermodynamic parameters, such as &amp;#916;Gº, &amp;#916;Hº, &amp;#916;Sº and Ea have been calculated. The data showed that the sorption process is spontaneous and exothermic in nature and that lower solution temperatures favours metal ion removal by the biomass. The findings of this investigation suggest that physical sorption plays a role in controlling the sorption rate. The sticking probability model was...
Tipo: Journal article
Palavras-chave: Biosorption; Cocoyam; Heavy metals removal; Temperature; Thermodynamics of sorption; Waste management.
Ano: 2005
URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0717-34582005000200005

Batch and fixed-bed column biosorption of manganese ion by Sargassum filipendula
Provedor de dados: 69
Autores: Henriques,Cristiane Assumpção; da Costa,Antonio Carlos Augusto; dos Reis,Marcelo Martins; Costa,André Luiz Hemerly; Luna,Aderval Severino.
This paper presents experimental data of the biosorption of manganese onto Sargassum filipendula in both batch and fixed-bed column systems. Batch equilibrium data were used for nonlinear fittings of the Langmuir and Freundlich isotherms. A mathematical model based on mass balances in the fluid and in the sorbent was applied to represent the experimental fixed-bed column data. The utilization of isotherm parameters from the batch experiments in the breakthrough model implied a significant mismatch in relation to the laboratory data. Alternatively, additional fixed-bed column data provided new parameters for the isotherm evaluation, and the corresponding simulated profile of the breakthrough curve reached better agreement to the experimental results.
Tipo: Journal article
Palavras-chave: Biosorption; Breakthrough curve; Equilibrium isotherm; Manganese; Metal removal.
Ano: 2011
URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0717-34582011000500008

Biosorption kinetics of a direct azo dye Sirius Blue K-CFN by Trametes versicolor
Provedor de dados: 69
Autores: Erden,Emre; Kaymaz,Yasin; Pazarlioglu,Nurdan Kasikara.
In this study, lyophilized Trametes versicolor biomass is used as a sorbent for biosorption of a textile dye, Sirius Blue K-CFN, from an aqueous solution. The batch sorption was studied with respect to dye concentration, adsorbent dose and equilibrium time. The effect of pH and temperature on dye uptake was also investigated and kinetic parameters were determined. Optimal initial pH (3.0), equilibrium time (2 hrs), initial dye concentration ( 100 mg l-1) and biomass concentration (1.2 mg l-1) were determined at 26ï¿½C. The maximum biosorption capacity (q max) of Sirius Blue K-CFN dye on lyophilized T. versicolor biomass is 62.62 mg/g. The kinetic and isotherm studies indicated that the biosorption process obeys to a pseudo-second order model and Langmuir...
Tipo: Journal article
Palavras-chave: Biosorbent; Biosorption; Direct dye; Kinetics; Sirius Blue K-CFN; Trametes versicolor.
Ano: 2011
URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0717-34582011000200003

Biosorption of hexavalent chromium using tamarind (Tamarindus indica) fruit shell-a comparative study
Provedor de dados: 69
Autores: Rao Popuri,Srinivasa; Jammala,Ajithapriya; Naga Suresh Reddy,Kachireddy Venkata; Abburi,Krishnaiah.
The adsorption of chromium (VI) ions from aqueous solutions has been investigated on crude tamarind fruit shell, HCl treated and Oxalic acid treated shells at room temperatures. The biosorbents are characterized by FT-IR, EDXRF and porosimetry. The biosorption experiments are conducted through batch system. The influence of different experimental parameters such as pH, effect of initial metal ion concentration and effect of dosage of adsorbent on biosorption are evaluated. The adsorption followed first order kinetics. The data are fitted well to Langmuir and Freundlich isotherm models. A comparison is drawn on the extent of biosorption between untreated and treated forms of the tamarind shells. Due to their outstanding adsorption capacities, tamarind...
Tipo: Journal article
Palavras-chave: Biosorption; Chromium (VI); Pre-treatment; Tamarindus indica fruit shell.
Ano: 2007
URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0717-34582007000300003

Lead biosorption onto waste beer yeast by-product: a means to decontaminate effluent generated from battery manufacturing industry
Provedor de dados: 69
Autores: Parvathi,Krishnakumar; Nagendran,Ramachandramurthy; Nareshkumar,Radhakrishnan.
This paper projects the potential of waste beer yeast Saccharomyces cerevisiae in biosorbing lead from battery manufacturing industrial effluent. Experiments were carried out as a function of pH, biosorbent concentration, lead concentration and agitation speed. Specific lead uptake of 2.34 mg/g was recorded and the data gave good fits for Freundlich and Langmuir models with Kf and Qmax values of 0.5149 and 55.71 mg/g. The roles played by amines, carboxylic acids, phosphates, sulfhydryl group and lipids in lead biosorption were studied. Electrostatic attraction may be the mechanism of biosorption. The extent of contribution of the functional groups and lipids to lead biosorption was in the order: carboxylic acids &gt; lipids &gt; amines &gt; phosphates....
Tipo: Journal article
Palavras-chave: Biosorption; Electrostatic attraction; Freundlich; Langmuir; Functional group; Lead; Yeast.
Ano: 2007
URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0717-34582007000100009

PEACH PIT CHEMICALLY TREATED BIOMASS AS A BIOSORBENT FOR METFORMIN HYDROCHLORIDE REMOVAL: MODELING AND SORPTION MECHANISMS
Provedor de dados: 70
Autores: Hellmann,Liliane; Schmitz,Ana P. de O.; Módenes,Aparecido N.; Hinterholz,Camila L.; Antoniolli,Camila de A.
ABSTRACT In this work, the potential of peach pit biosorption in the removal of the drug metformin hydrochloride from water is evaluated. Experiments are carried out in a closed batch system to evaluate the effect of the solution pH (2–10), temperature (25, 35 and 45 °C), stirring (100, 150 and 200 rpm) and chemical treatments. During the study, biosorbent characterization, kinetic tests, equilibrium tests and thermodynamic parameter calculations are performed. The operating conditions that show the best results for both the raw biosorbent and the biosorbent submitted to acid, basic and acid followed by basic treatments with removal capacities of 3.17, 10.83, 18.10 and 49.14 mg g−1, respectively, are pH 7, 25 °C and 100 rpm, which result in an equilibrium...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Biosorption; Metformin hydrochloride; Peach pit; Kinetic modeling; Equilibrium modeling.
Ano: 2021
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-69162021000200181

Study of biosorption of copper and silver by marine bacterial exopolysaccharides
Provedor de dados: 5
Autores: Deschatre, Marine; Ghillebaert, F.; Guezennec, Jean; Simon-colin, Christelle.
Metal bioremediation was studied by biosorption of analytical grade copper Cu(II) and silver Ag(I) by an exopolysaccharide (EPS) produced by marine bacteria from French Polynesia. Colorimetric analysis showed that EPS was composed of neutral sugars, uronic acids, acetate and especially high sulfate amount (29%). Metal biosorption experiments were conducted in batch process. Results showed that the maximum sorption capacities calculated according to Langmuir model were 400 mg g(-1) EPS (6.29 mmol g(-1)) and 256 mg g(-1) EPS (2.38 mmol g(-1)) for Cu(II) and Ag(I), respectively. The influence of pH, biosorbent concentration, ionic strength on EPS biosorption capacities was investigated. Results showed that bacterial EPS can be considered as very promising for...
Tipo: Text
Palavras-chave: Biosorption; Bacterial exopolysaccharides; Copper and silver removal; Bioremediation.
Ano: 2015
URL: https://archimer.ifremer.fr/doc/00601/71336/69766.pdf

The use of Crambe abyssinica seeds as adsorbent in the removal of metals from waters
Provedor de dados: 91
Autores: Gonçalves Jr.,Affonso C.; Rubio,Fernanda; Meneghel,Ana P.; Coelho,Gustavo F.; Dragunski,Douglas C.; Strey,Leonardo.
This study aimed to evaluate the efficacy of crambe seeds (Crambe abyssinica Hochst) as adsorbent material in the removal of the toxic metals cadmium, lead and chromium from contaminated solutions. The byproduct was obtained from oil extraction of crambe seeds in a Soxhlet system. In kinetic tests, the adsorbent masses had varied in solutions containing the metals under pH 5.0 and 7.0. Metal concentrations were determined by flame atomic absorption spectrometry (FAAS). According to optimal conditions found, the adsorption assays were performed for obtaining the isotherms of each metal, which were linearized in agreement with the mathematical models of Langmuir and Freundlich. According to the obtained results, the adsorbent was effective in removing the...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Biosorption; Remediation of waters; Sustainability.
Ano: 2013
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1415-43662013000300009

Recovery of copper (II) absorbed in biomass of Cladosporium cladosporioides
Provedor de dados: 63
Autores: Carmo,Juliana Ribeiro do; Pimenta,Carlos José; Silva,Júlia Ferreira da; Souza,Sara Maria Chaulfoun de.
The biosorption process, characterized by the use of biomass for removing metals from aqueous solutions, is an attractive technology using inactive and dead biomasses to remove heavy metals from aqueous solutions in the absence of metabolic activity necessary for intracellular accumulation. The desorption process, which concentrates the metal previously absorbed for possible reuse, is also important. The desorption of copper (Cu) (II) associated with the biomass of Cladosporium cladosporioides (Fres) de Vries was evaluated following the biosorption process (adsorption). Specifically, four eluents were used (all at a concentration 0.1 mol L-1), sulfuric acid, hydrochloric acid, ethylenediaminetetraacetate disodium and calcium chloride, as well as the...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Biosorption; Metal; Desorption.
Ano: 2013
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-90162013000300002

Investigation of Some Parameters Affecting Methyl OrangeRemoval by Fusarium acuminatum
Provedor de dados: 52
Autores: Yucel,Tugba Tugrul.
ABSTRACT Dye stuff released to the ecosystem from textile industries cause a serious contamination and become a major environmental problem over the last few decades. As biological decolorization of textile wastewater is an important issue, Fusarium . acuminatum was used to removal of a frequently used textile dye, methyl orange. Live pellet of Fusarium acuminatum was used and decolorization studies performed in various temperatures and pH conditions with different dye concentrations. The highest decolorization rate was observed at 35ᴼC. 60 mg/L was found as the optimum initial dye concentration. In the pH range of 3-4, decolorization rate was approximately 70%. It was seen that Fusarium acuminatum have the great ability of the methyl orange removal. To...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Biosorption; Azo dye; Methyl orange; Fusarium acuminatum; Live pellet.
Ano: 2018
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-89132018000100419

Evaluation and enhancement of heavy metals bioremediation in aqueous solutions by Nocardiopsis sp. MORSY1948, and Nocardia sp. MORSY2014
Provedor de dados: 58
Autores: El-Gendy,Mervat Morsy Abbas Ahmed; El-Bondkly,Ahmed Mohamed Ahmed.
ABSTRACT An analysis of wastewater samples collected from different industrial regions of Egypt demonstrated dangerously high levels of nickel (0.27-31.50 mg L-1), chromium (1.50-7.41 mg L-1) and zinc (1.91-9.74 mg L-1) in the effluents. Alarmingly, these heavy metals are among the most toxic knownones to humans and wildlife. Sixty-nine Actinomycete isolates derived from contaminated sites were evaluated under single, binary, and ternary systems for their biosorption capacity for Ni2+, Cr6+ and Zn2+ from aqueous solutions. The results of the study identified isolates MORSY1948 and MORSY2014 as the most active biosorbents. Phenotypic and chemotypic characterization along with molecular phylogenetic evidence confirmed that the two strains are members of the...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Biosorption; Heavy metals; Dead and live biomass; Nocardiopsis; Nocardia; Wastewater.
Ano: 2016
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1517-83822016000300571

Screening of Trichoderma isolates for their potential of biosorption of nickel and cadmium
Provedor de dados: 58
Autores: Nongmaithem,Nabakishor; Roy,Ayon; Bhattacharya,Prateek Madhab.
Abstract Fourteen Trichoderma isolates were evaluated for their tolerance to two heavy metals, nickel and cadmium. Three isolates, MT-4, UBT-18, and IBT-I, showed high levels of nickel tolerance, whereas MT-4, UBT-18, and IBT-II showed better tolerance of cadmium than the other isolates. Under nickel stress, biomass production increased up to a Ni concentration of 60 ppm in all strains but then decreased as the concentrations of nickel were further increased. Among the nickel-tolerant isolates, UBT-18 produced significantly higher biomass upon exposure to nickel (up to 150 ppm); however, the minimum concentration of nickel required to inhibit 50% of growth (MIC50) was highest in IBT-I. Among the cadmium-tolerant isolates, IBT-II showed both maximum biomass...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Heavy metals; Biosorption; Trichoderma; MIC50; Fungistasis.
Ano: 2016
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1517-83822016000200305

Uptake of free and complexed silver ions by different strains of Rhodotorula mucilaginosa
Provedor de dados: 58
Autores: Gomes,Newton C.M.; Rosa,Carlos A.; Pimentel,Patrícia F.; Mendonça-Hagler,Leda C.S.
Five strains of Rhodotorula mucilaginosa were tested for the ability to accumulate free and complexed silver ions by metabolism-dependent and -independent processes. The ability to take up Ag+ was observed in both live and dead biomass, whereas silver dicyanide [Ag (CN)2-] uptake was strictly glucose dependent. In contrast to Ag (CN)2-, glucose addition inhibited by 16 to 25% the Ag+ uptake rate of living UFMG - Y02, Y27, and Y35 cells, while strains CBS 316 and UFMG-Y01 showed an improved uptake rate of about 115% and 13%, respectively. The Langmuir sorption model was used to evaluate the silver sorption capability of the R. mucilaginosa strains. The calculated q max value suggested that R. mucilaginosa strains UFMG-Y27 had the highest loading capacity....
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Bioaccumulation; Biosorption; Rhodotorula mucilaginosa; Silver.
Ano: 2002
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1517-83822002000100013

Heavy metal biosorption by chitin and chitosan isolated from Cunninghamella elegans (IFM 46109)
Provedor de dados: 58
Autores: Franco,Luciana de Oliveira; Maia,Rita de Cássia C.; Porto,Ana Lúcia F.; Messias,Arminda Sacconi; Fukushima,Kazutaka; Campos-Takaki,Galba Maria de.
Chitin and chitosan were extracted from mycelial biomass of Cunninghamella elegans and the performance for copper, lead and iron biosorption in aqueous solution was evaluated. The growth curve of C. elegans was accomplished by determination of biomass, pH, glucose and nitrogen consumption. Chitin and chitosan were extracted by alkali-acid treatment and the yields were 23.8 and 7.8%, respectively. For the adsorption analysis, the process of heavy uptake metal sorption was evaluated using polysaccharides solutions (1% w/v). The rate of metallic biosorption was dependent upon the concentration and pH of metal solutions, and the best results were observed with pH 4.0. Chitosan showed the highest affinity for copper and chitin for iron adsorption. The results...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Cunninghamella elegans; Chitin; Chitosan; Bioremediation; Biosorption.
Ano: 2004
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1517-83822004000200013

Nickel biosorption by Acinetobacter baumannii and Pseudomonas aeruginosa isolated from industrial wastewater
Provedor de dados: 58
Autores: Rodríguez,Carlos E.; Quesada,Adolfo.
Nickel biosorption ability was evaluated in two bacterial strains: Acinetobacter baumannii UCR-2971 and Pseudomonas aeruginosa UCR-2957, resulting in greatest adsorption at pH 4.5 and a residence time of 100 minutes. Biosorption isotherms showed that the process follows the Langmuir model. The maximum adsorption rates (Nmax) were 8.8 and 5.7 mg·g-1 for A. baumannii and P. aeruginosa, respectively; however, affinity constants suggest that P. aeruginosa (K=1.28) has higher affinity for nickel than A. baumannii (K=0.68). It is suggested that both strains could be used for wastewater treatment, as long as the concentration of Ni2+ is within the range of mg·L-1.
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Biosorption; Nickel; Acinetobacter baumannii; Pseudomonas aeruginosa; Wastewater treatment.
Ano: 2006
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1517-83822006000400012