Biosorption Of Co Research Articles

Screening and performance optimization of fungi for heavy metal adsorption in electrolytes.

The resource recovery and reuse of precious metal-laden wastewater is widely recognized as crucial for sustainable development. Superalloy electrolytes, produced through the electrolysis of superalloy scrap, contain significant quantities of precious metal ions, thereby possessing substantial potential for recovery value. This study first explores the feasibility of utilizing fungi to treat Superalloy electrolytes. Five fungi resistant to high concentrations of heavy metals in electrolytes (mainly containing Co, Cr, Mo, Re, and Ni) were screened from the soil of a mining area to evaluate their adsorption characteristics. All five fungi were identified by ITS sequencing, and among them, Paecilomyces lilacinus showed the best adsorption performance for the five heavy metals; therefore, we conducted further research on its adsorption characteristics. The best adsorption effect of Co, Cr, Mo, Re, and Ni was 37.09, 64.41, 47.87, 41.59, and 25.38%, respectively, under the conditions of pH 5, time 1 h, dosage 26.67 g/L, temperature 25-30°C, and an initial metal concentration that was diluted fivefold in the electrolyte. The biosorption of Co, Mo, Re, and Ni was better matched by the Langmuir model than by the Freundlich model, while Cr displayed the opposite pattern, showing that the adsorption process of P. lilacinus for the five heavy metals is not a single adsorption mechanism, but may involve a multi-step adsorption process. The kinetics study showed that the quasi-second-order model fitted better than the quasi-first-order model, indicating that chemical adsorption was the main adsorption process of the five heavy metals in P. lilacinus. Fourier transform infrared spectroscopy revealed that the relevant active groups, i.e., hydroxyl (-OH), amino (-NH2), amide (- CONH2), carbonyl (-C = O), carboxyl (-COOH), and phosphate (PO43-), participated in the adsorption process. This study emphasized the potential application of P. lilacinus in the treatment of industrial wastewater with extremely complex background values.

Biosorption and Symbiotic Potential of Horse Gram Rhizobia in Soils Contaminated with Cobalt

The current study aims evaluation of biosorption and symbiotic potential of horse gram plants associated with rhizobia inspite of Cobalt (Co) metal stress, and these rhizobia strains play a pivotal role in the phytoremediation of Co heavy metal-contaminated soils. Horse gram rhizobial isolates HGR-4, HGR-6, HGR-13 and HGR-25 were able to tolerate 1000µgg-1 Co supplemented in culture media and also 100µgg-1 in Co supplemented soil. The plants nodulated with the isolates from the study have shown higher nodulation, nitrogen and leghaemoglobin content in the potted experiment on par with the control plants. Atomic absorption spectroscopic analysis of Co content in horse gram plants inoculated with these four isolates showed maximum biosorption of Co among the bacterial root nodules. Application of these strains can be potentially aid the phytoextraction of Co from contaminated soils on association with horse gram plants.

The biosorption of Co(II) by Homalothecium sericeum from aqueous solutions under batch conditions: response surface methodology optimization and Daphnia magna bioassay

The biosorption of Co(II) by Homalothecium sericeum from aqueous solutions under batch conditions: response surface methodology optimization and Daphnia magna bioassay

Effect of alkali treatment on the removal of Co(II) ions by Leucaena leucephala biomass

In this study, raw Leucaena leucephala (Raw-LL) and its chemically treated NaOH counterparts (LL-NaOH) were used as low-cost biosorbents to remove Cobalt (II) from the aqueous solution. The biosorbents were characterized by Fourier-transform infrared spectroscopy (FT-IR), scanning electron microscopy (SEM), energy-dispersive X-ray spectroscopy (EDS), thermal gravimetric analysis (TGA), and X-ray diffraction (XRD), while the point of zero-charge (pHPZC) was also measured. Co(II) removal by Raw-LL and LL-NaOH was studied using batch experiments after optimizing various factors, namely the initial solution pH, contact time, initial Co(II) concentration, dosage of biosorbents, and temperature. The derived results from the characterization revealed changes in the biosorbent’s surface chemistry that positively impacted Co(II) removal. In addition, the sorption capacity of Co(II) on Raw-LL and LL-NaOH showed dependence on all investigated parameters. The kinetic data were fitted to pseudo-first and pseudo-second-order kinetic models, and the isotherm data were analyzed by Langmuir and Freundlich models. The biosorption of Co(II) on Raw-LL and LL-NaOH followed pseudo-second-order kinetic (R2 > 0.999) and Langmuir isotherm model (R2 > 0.995). Based on the Langmuir isotherm, the maximum biosorption capacity was 9.4 (Raw-LL) and 25.4 mg/g (LL-NaOH), values considered high for biomass-derived materials without activation/carbonization at elevated temperatures.

Optimization of Heavy Metals Biosorption via Artificial Neural Network: A Case Study of Cobalt (II) Sorption by Pseudomonas alcaliphila NEWG-2.

The definitive screening design (DSD) and artificial neural network (ANN) were conducted for modeling the biosorption of Co(II) by Pseudomonas alcaliphila NEWG-2. Factors such as peptone, incubation time, pH, glycerol, glucose, K2HPO4, and initial cobalt had a significant effect on the biosorption process. MgSO4 was the only insignificant factor. The DSD model was invalid and could not forecast the prediction of Co(II) removal, owing to the significant lack-of-fit (P < 0.0001). Decisively, the prediction ability of ANN was accurate with a prominent response for training (R2 = 0.9779) and validation (R2 = 0.9773) and lower errors. Applying the optimal levels of the tested variables obtained by the ANN model led to 96.32 ± 2.1% of cobalt bioremoval. During the biosorption process, Fourier transform infrared spectroscopy (FTIR), energy-dispersive X-ray spectroscopy, and scanning electron microscopy confirmed the sorption of Co(II) ions by P. alcaliphila. FTIR indicated the appearance of a new stretching vibration band formed with Co(II) ions at wavenumbers of 562, 530, and 531 cm–1. The symmetric amino (NH2) binding was also formed due to Co(II) sorption. Interestingly, throughout the revision of publications so far, no attempt has been conducted to optimize the biosorption of Co(II) by P. alcaliphila via DSD or ANN paradigm.

Voltammetric detection of biosorption of Co, Ni, Zn, Cd, Pb, and Cu on Hypnum cupressiforme Hedw. in aquatic media

Voltammetric detection of biosorption of Co, Ni, Zn, Cd, Pb, and Cu on Hypnum cupressiforme Hedw. in aquatic media

Polymeric Biomass Derived Adsorbents for Co(II) Remediation, Recycling and Analysis.

The gradual replacement of conventional materials with materials tailored to the green development goals is one of the needs of the day. Correspondingly, this article reviews and integrates, for the first time, the gathered knowledge on the use of the adsorbents based on polymeric biomasses (biosorbents) for a cleaner separation of cobalt (Co) from synthetic and actual solutions. It is a two-part comprehensive approach that debates the Co biosorption potential of bio-based polymers from the perspective of their virtual and real applications for decontamination, recovery, and analytical purposes. First, the removal performances of these materials to batch and fixed column biosorption of Co(II) from mono-component and multi-metallic laboratory solutions are systematized and discussed. Following that, the focus of the first part is shifted to the analytical capabilities of the biosorbents proposed for Co(II) quantification from synthetic solutions. The second section considers the polymeric biomasses successfully incorporated in practical strategies for the removal and recovery of Co(II) from real solutions. The opportunities provided by the use of biosorbents for the development of accurate and greener procedures in Co(II) analysis are also highlighted. The directions in which the research on this topic should be continued and strengthened are suggested.

Application of Saccharomyces cerevisiae in the Biosorption of Co(II), Zn(II) and Cu(II) Ions from Aqueous Media

Yeast biomass is considered a low-cost material that can be successfully used for the biosorption of metal ions from aqueous solution, due to its structural characteristics. This study evaluates the biosorptive performance of Saccharomyces cerevisiae in the biosorption of Co(II), Zn(II) and Cu(II) ions from aqueous media in batch mono-component systems. The influence of solution pH, biosorbent dose, contact time, temperature and initial metal ions concentration was examined step by step, to obtain the optimal conditions for biosorption experiments. Maximum uptake efficiency for all metal ions on this biosorbent was obtained at: pH = 5.0, 4.0 g biosorbent/L, room temperature of 23 °C, and a contact time of 60 min, and these were considered optimal. The equilibrium results were analyzed using Langmuir, Freundlich and Dubinin–Radushkevich isotherm models, while for the modeling of the kinetics data, three models (pseudo-first order, pseudo-second order and intra-particle diffusion) were used. Dubinin–Radushkevich isotherm model and the pseudo-second order model showed the best fit with the experimental data obtained at biosorption of Co(II), Zn(II) and Cu(II) ions on Saccharomyces cerevisiae. Both maximum biosorption capacities and pseudo-second rate constants follow the order: Co(II) &gt; Zn(II) &gt; Cu(II), suggesting that the structural particularities of metal ions are important in the biosorption processes. Based on the obtained equilibrium and kinetic parameters, the biosorption mechanism is analyzed and the possible applications are emphasized.

Biosorption of Co (II) ions from aqueous solutions using selected local Luffa Cylindrica: Adsorption and characterization studies

The present study is concerned with the removal of Cobalt (II) from aqueous solution by adsorption onto low cost adsorbent. Luffa Cylindrica as adsorbent, (LC) was investigated in batch adsorption system. LC was characterized by Scanning Electron Microscopy (SEM) and Brunauer-Emmett-Teller (BET) surface area analyzer. The sorption of Co (II) ions by LC was subjected to equilibrium, thermodynamics and kinetic studies and was carried out by considering the effects of pH, effect of masse and particles size of the biosorbent, initial metal ions concentration, contact time and temperature. BET surface area of LC was 46.396 m 2 /g. The optimum conditions for maximum adsorption were attained at pH 6 and LC mass is 1.5 g with particle size is < 0.08 mm and contact time is 60 min. The pseudo-second-order rate equation described the Kinetic data well. The process is chemisorptive and controlled by the pseudo-second-order. Adsorption parameters were determined using both Langmuir and Freundlich isotherms, but the experimental data were better fitted to the Langmuir equation than to Freundlich equation, with correlation coefficients above 0.99 which indicates the adsorption is monolayer adsorption with maximum adsorption capacity for Co(II) was 2.53 mg/g.

Adsorptive Removal of Cobalt (II) and Chromium (III) from Aqueous Solution onto Citrus Limon Leaves Powder

The growth of heavy metals in wastewater is a widespread concern that affects thousands of lives and spread diseases worldwide. Its extraction is subject of concert from last few decades. Looking forward in the current study, Citrus Limon leaves were used as an adsorbent for the Biosorption of Co(II) and Cr(III) in a batch system. Citrus Limon leaves were brought from the local garden of Amakhel, Tank, Pakistan. The removal process of Co(II) and Cr(III) was examined under different conditions of pH, contact time, and initial concentration to get the optimum condition. It was found optimum contact time for Co(II) and Cr(II) was 20 and 10 minutes. By the increase of concentration of adsorbate, the value of qe was investigated for Co(II) and Cr(III) at 20oC. The optimum initial concentration for Cr(III) and Co(II) was 60 ppm and 40 ppm, respectively. The optimum shaking power for Cr(III) and Co(II) was found to be 150 rpm and 120 rpm, respectively.

Development of an analytical method for the extraction and determination of trace metals using fungus (Mucor pusillus, Lindt., 1886) immobilised sepiolite powder biocomposite in various samples by ICP-AES

ABSTRACT In this study, an extraction procedure based on biosorption of Co(II), Cr(III), Mn(II), Ni(II) and Zn(II) using biocomposite of fungus (Mucor pusillis, Lindt., 1886) immobilised sepiolite powder has been developed preconcentration. For the quantitative recovery of the analytes, different parameters pH, amount of solid-phase, flow rate of the sample solution and eluent type were optimised. The interference of foreign ions on the recovery of the analytes was also investigated. Elution was carried out with 2 mL of 5% HNO3, 100 mg sorbent dosage. The recoveries of Co(II), Cr(III), Mn(II), Ni(II) and Zn(II) by Mucor pusillis (Lindt., 1886) immobilised on sepiolite powder were obtained 100 ± 2%, 98 ± 2% 96 ± 2%, 99 ± 2%, 98 ± 3% at 95% confidence level, respectively, for spiked environmental samples. The analytical detection limits were calculated 1.2, 1.3, 1.4, 0.6 and 0.2 ng/mL for Co(II), Cr(III), Mn(II), Ni(II) and Zn(II) preconcentration, respectively. Standard reference materials of biological samples were used to validate the data. Method was applied on the real environmental samples including tap water, river water and vegetable samples to determine the concentration of the analytes. Determinations were carried out using ICP-AES.

Bioremoval of Cobalt(II) from Aqueous Solution by Three Different and Resistant Fungal Biomasses.

The biosorption of Co(II) on three fungal biomasses: Paecilomyces sp., Penicillium sp., and Aspergillus niger, was studied in this work. The fungal biomass of Paecilomyces sp. showed the best results, since it removes 93% at 24 h of incubation, while the biomasses of Penicillium sp. and Aspergillus niger are less efficient, since they remove the metal 77.5% and 70%, respectively, in the same time of incubation, with an optimum pH of removal for the three analyzed biomasses of 5.0 ± 0.2 at 28°C. Regarding the temperature of incubation, the most efficient biomass was that of Paecilomyces sp., since it removes 100%, at 50°C, while the biomasses of Penicillium sp. and Aspergillus niger remove 97.1% and 94.1%, at the same temperature, in 24 hours of incubation. On the contrary, if the concentration of the metal is increased, the removal capacity for the three analyzed biomasses decreases; if the concentration of the bioadsorbent is increased, the removal of the metal also increases. It was observed that, after 4 and 7 days of incubation, 100%, 100%, and 96.4% of Co(II) present in naturally contaminated water were removed, respectively.

Biosorption of Co (II) from aqueous solution using algal biochar: Kinetics and isotherm studies

The present investigation deals with the utilization of biochar derived from the pyrolysis of microalgae Scenedesmus dimorphus as an adsorbent for the removal of cobalt (II) ion (Co) from aqueous solution. A series of experiments were conducted in a batch system to evaluate the performance of the biochar for Co removal. The effect of contact time on adsorption of Co (II) onto surface of the biochar was investigated. The equilibrium sorption data were analyzed by using Langmuir, Freundlich, Temkin, Harkins-Jura and Dubinin-Radushkevich (D-R) isotherms and were found to be adequate in describing the Co adsorption onto the biochar. Equilibrium data were well fitted for Freundlich, Temkin and D-R isotherms. The kinetic study of Co (II) adsorption on microalgae biochar were described by applying pseudo-first-order and pseudo-second-order rate equations. The surface of adsorbent before and after the removal of Co (II) was characterized by using SEM, EDX and XRD analysis.

Biosorption of Co(II) Metal by Original and KMnO4 Pretreated Trapa natan Biopolymer

Bioadsorption of Co(II) metal ions from the aqueous medium using Trapa natan peels biomass was examined for preliminary pH, initial metal absorption and contact time. Pretreatment of biomass were carried out with oxidizing agents. The maximum uptake q (mgg-1) for Co(II) obtained by KMnO4 -TNP was about (53.92) as compared to Native- TNP (24.28) at pH 5. The equilibrium and kinetics models were applied over data. The Langmuir and Freundlich equilibrium adsorption models were investigated and observed to the fit the data. The Freundlich model gave better fit than the Langmuir model with R2 value of 0.9951. Kinetic study revealed that adsorption was fast in first 60 minutes and equilibrium was achieved after 120 minutes for Co(II) metal. The suitability of a pseudo second order chemical reaction for the sorption of Co(II) onto this biosorbent was apparent. The results revealed that Trapa natans peels biomass is effective, potential and best beneficial biosorbent for removal of heavy metals.

Adsorptive removal of cobalt ions on raw and alkali-treated lemon peels

Batch-wise biosorption of Co(II) from aqueous cobalt nitrate solution of different concentrations has been carried out on raw and NaOH-treated lemon peels. They were characterized by Fourier transform infrared spectroscopy, scanning electron microscopy, energy-dispersive X-ray spectroscopy, thermogravimetric analysis and Brunauer–Emmett–Teller surface area analysis. The influence of biosorbent dose, pH, contact time and temperature on the adsorption process has been studied. Maximum adsorption was observed at pH 6. The equilibrium adsorption on raw and NaOH-treated lemon peels was achieved in 150 and 210 min, the maximum adsorption capacity being 20.83 and 35.71 mg/g, respectively. Energy-dispersive X-ray spectroscopy and desorption study confirmed that the mechanism of adsorption is ion exchange. The Langmuir isotherm and pseudosecond-order kinetic model gave the best fit for the adsorption of Co(II). The desorption was found to be more than 96 % using 0.1 N HCl, and the adsorbent could be reused three times with intermediate alkaline regeneration stage. Experiments to establish the effect of competing metal ions on biosorption capacity were also performed. Thus, NaOH-treated lemon peels have shown the potential as a good biosorbent for treating industrial wastewater at low cobalt concentration.

Potential of Various Immobilization Matrices in Heavy Metal Ions Removal Using Nostoclinckiabeads: A Comparative Study

This article reports the potential of removal of heavy metal ions of hexavalent chromium Cr(VI) and bivalent Cobalt Co (II) by different immobilization matrices containing dead cyanobacterial biomass of Nostoclinckia. Nostoclinckia was pre-treated by successive washes in distilled water, dried and then crushed to increase the surface area of biomass which was then immobilized in different immobilization matrices like Calcium alginate, polyvinyl alcohol alginate and polyvinyl alcohol alginate glutaraldehyde that was stable and easy to handle. The immobilized beads of Nostoclinckia was used to study the adsorption of metals (Cr VI & Co II) from simulated wastewaters under varying range of contact time (5-180 minutes), pH (1-6) and initial metal ion concentration (10-50mg/l) in a batch adsorption system. Experimental results showed that the different matrices pose impact on the different variable parameters like the optimum pH for biosorption of Cr (VI) ions was found to be 2.0 in alginate immobilized biomass while it was 4.0 polyvinyl alcohol alginate and polyvinyl alcohol alginate glutaraldehyde immobilized biomass. Similarly the maximum biosorption of Co (II) occurred at pH 3.0 in alginate biosorbent while it was 5 in polyvinyl alcohol alginate and polyvinyl alcohol alginate glutaraldehydebiosorbent. Similarly values of optimized contact times and initial metal ion concentrations were different for same biomass concentration immobilized in different matrices. From the results it can be concluded that the immobilization matrices affects the optimum values of different parameters in same conditions. Langmuir and Freundlich adsorption models were applied to describe the isotherms and isothermic constants. Freundlich model was fitted best in case of both metals. Alginate immobilized biomass was suited most for removal of hexavalent chromium (R 2 =0.992) while PVA-A is found to have very high adsorption capacity for Co (II) as shown by (R 2 =0.9978).

Iron Oxide Impregnated Morus alba L. Fruit Peel for Biosorption of Co(II): Biosorption Properties and Mechanism

Biosorption is an ecofriendly wastewater treatment technique with high efficiency and low operating cost involving simple process for the removal of heavy metal ions from aqueous solution. In the present investigation, Morus alba L. fruit peel powder (MAFP) and iron oxide impregnated Morus alba L. fruit peel powder (IO-MAFP) were prepared and used for treating Co(II) contaminated aqueous solutions. Further the materials were characterized by using FTIR and SEM-EDX analysis. From FT-IR analysis it was found that hydroxyl, methoxy, and carbonyl groups are responsible for Co(II) biosorption. The kinetic data obtained for both biosorbents was well fitted with pseudo-second-order kinetic model. The equilibrium data was in tune with the Langmuir and Freundlich isotherm models. The thermodynamic studies were also carried and it was observed that sorption process was endothermic at 298–328 K. These studies demonstrated that both biosorbents were promising, efficient, economic, and biodegradable sorbents.

Biosorption of Co(II) by Schizosaccharomyces pombe: Kinetic and Thermodynamic Studies for Process Design

The characterisation of biosorption by Schizosaccharomyces pombe of Co(II) was done under varying experimental conditions including pH, temperature, initial metal concentration and biosorbent dose. Optimum pH was found to be 5.0 with optimal biosorbent dose for highest adsorption capacity at 1.0 g L-1. Higher initial metal concentrations helped enhance qe slightly with the highest value, 2.7 mg g-1, being achieved at 25°C and 50 mg L-1 initial Co(II). Temkin isotherm model showed the best statistical fit for equilibrium data while Freundlich isotherm model exhibited thermodynamic consistency. Pseudo-first order kinetics was found to represent Co(II) biosorption. Increasing ΔG0 values calculated with respect to higher operational temperatures were in agreement with kinetic profiling simulations whereby higher temperatures were found to be less favourable. Overall efficiency of S. pombe as a biosorbent for Co(II) was found to be significantly less than Ni(II), for this reason it can be regarded as a potential bioseparation agent for aqueous mixtures containing both Co(II) and Ni(II).

Thermodynamics of Biosorption for Removal of Co(II) Ions by an Efficient and Ecofriendly Biosorbent (Saccharum bengalense): Kinetics and Isotherm Modeling

In this research work, a low‐cost biomass derived from the pulp of Saccharum bengalense (SB) was used as an adsorbent material/biosorbent for the removal of Co(II) ions from aqueous solution. Langmuir, Freundlich Timken, and Dubinin‐Radushkevich (D‐R) adsorption isotherms have been applied to further define the mechanism of sorption. From the comparison of different adsorption isotherm models, it was found that biosorption of Co(II) by SB followed Langmuir and Freundlich models. The sorption capacity for cobalt of Saccharum bengalense was (qm = 14.7 mg/g) at 323K. A comparison of kinetic models applied to the adsorption of Co(II) onto Saccharum bengalense was evaluated for the pseudo‐first‐order, pseudo‐second‐order, Elovich, and intraparticle diffusion and Bangham′s kinetics models. It was found that the pseudo‐second‐order mechanism is predominant. Activation parameters evaluated from thermodynamics and kinetic parameters such as free energy change (ΔG0 = −0.254, ΔG# = 84.63 kJ/mol), enthalpy change (ΔH0 = +22.24, ΔH# = 0.004 kJ/mol), and entropy change (ΔS0 = 0.065, ΔS# = 0.262 kJ/mol) revealed the spontaneous, endothermic, and feasible nature of adsorption process. The results of the present investigation suggested that Saccharum bengalense (SB) can be used as an environmentally and economically feasible biosorbent for the removal of Co(II) from aqueous solutions.

Flocculating Property of Extracellular Polymeric Substances Produced by a Biofilm-Forming Bacterium Acinetobacter junii BB1A

Extracellular polymeric substances (EPS) produced by a biofilm-producing bacterium Acinetobacter junii BB1A were characterized. Purified EPS on analysis revealed neutral sugar (73.21 %), uronic acid (10.12 %), amino sugars (0.23 %), α- amino acids (11.13 %), and aromatic amino acids (1.23 %). Infrared spectrometry revealed the presence of hydroxyl, carboxyl, and amide groups. The average molecular weight of the polysaccharide (PS) fraction of EPS was ~2×10(5). Gas liquid chromatography analysis of PS revealed the presence of three main sugar residues, namely, mannose, galactose, and arabinose (molar ratio of 3:1:1). Cation-independent flocculation above 90 % was observed in the pH range of 4-5 with EPS dosage of 30 mgl(-1) at 20 °C. The emulsifying activity of EPS was 66.6 % with toluene, 60 % with n-hexadecane, 53.3 % with olive oil, and least activity of 13.3 % with kerosene. Proteinase K- and trichloroacetic acid-treated EPS showed reduction in flocculation and emulsification, suggesting the significant role of protein component. Energy dispersive X-ray spectroscopy was used to provide direct evidence of biosorption of Co(II), Cd(II), and Hg(II) by EPS.