Polyhydroxoethylmethacrylate (polyHEMA) -trimethylolpropanetrimethacrylate ( (TMPTM) as a support for metal biosorption with Arthrobacter sp.

Vegliò, Francesco; Beolchini, Francesca; Gasbarro, A.; Lora, S.; Corain, Benedetto; Toro, Luigi

doi:10.1016/s0304-386x(96)00058-8

Cited by 17 publications

(18 citation statements)

References 8 publications

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“…Uptake of Cr (125.4 mg/g) is over 5 times greater than the highest values reported for active sludge (24 mg/g) or for free or immobilized R arrhizus in a stirred tank or fluidized bed reactor (23-24 mg/g) (35). The removal of Cr observed in our study was 25 times greater than the highest values reported for uptake by a single organism (3-5 mg/g) (19). The increased resistance of the stabilized chitosan to low pH and the high uptake of Cr show the potential for applications in extremely acid conditions.…”

Section: Biomass Stabilizationcontrasting

confidence: 56%

“…Mechanical and chemical stability has been conferred by immobilization techniques, such as adsorption on inert supports, entrapment in polymeric matrices, covalent bonding to carriers, and chemical cross-linking (18,19).…”

Section: Reprintsmentioning

confidence: 99%

“…The physicochemical parameters examined were based on previous literature reports (18,19) and from preliminary kinetic studies performed with chitosan (1 g/L) at pH 4 and metal concentrations of 50 mg/L where liquid samples were removed and analyzed over time. Under the experimental conditions, with most of the metals examined, equilibrium conditions occurred within 2 hours (Fig.…”

Section: Kinetic Studiesmentioning

confidence: 99%

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Biosorption of Metal Ions Using Chitosan, Chitin, and Biomass of Rhizopus Oryzae

Mcafee¹,

Gould²,

Nadeau³

et al. 2001

Sep Sci Technol

130

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The biosorptive capacity of dried biomass fungus Rhizopus oryzae Went & Prinsen-Geerlings for metal sorption was compared with commercially available sources of chitin, chitosan and chitosan cross-linked with benzoquinone. Initial pH of the metal solution significantly influenced metal uptake capacity. The optimum biomass/solution ratio for metal uptake in all systems was 1 g/L. The highest metal uptake values (137, 108, 58, and 124 mg/g, respectively, for copper, zinc, arsenic, and chromium) were achieved with chitosan (1 g/L, at pH 4) from initial metal concentrations of 400 mg/L. Decreases in mean metal concentrations from a simulated copper/zinc mine effluent were 73%, 14%, and 36% for copper, aluminum, and zinc, respectively, which corresponded to re-ORDER REPRINTS spective metal uptake values of 16, 11, and 21 mg/g. Sorption from a simulated gold mine effluent showed decreases in mean concentrations of aluminum, arsenic, and copper of 85%, 30%, and 92%, respectively, which corresponded to respective metal uptake values of 3.0, 6.0, and 1.6 mg/g. The observed decreases in copper levels to concentrations below 1 mg/L indicate potential for specific polishing applications. At low pH, R oryzae biomass was more resistant than was chitosan. Cross-linking with benzoquinone under alkaline conditions conferred stability to the chitosan biomass under low pH, but some reduction in sorption capacity was observed.

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Section: Biomass Stabilizationcontrasting

confidence: 56%

Section: Reprintsmentioning

confidence: 99%

Section: Kinetic Studiesmentioning

confidence: 99%

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Biosorption of Metal Ions Using Chitosan, Chitin, and Biomass of Rhizopus Oryzae

Mcafee¹,

Gould²,

Nadeau³

et al. 2001

Sep Sci Technol

130

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“…14 In addition, the poor mechanical stability of the native microorganisms may have limited their further application under real conditions. 15,16 Hence, it is important to improve the stability of microorganisms before their further application in industries. As far as the authors know, immobilization was the only method to improve the mechanical stability of the microorganisms.…”

Section: Introductionmentioning

confidence: 99%

Application of Chlorine Dioxide in Cell Surface Modification to Enhance Its Mechanical Stability and Metal Ion Adsorption

Wei

Zhou

et al. 2019

ACS Omega

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There has been a trend toward the use of microorganisms as the biomaterial for removing dyes and metals from wastewater. However, native microorganism cells have low mechanical stability, which limit their further application in industries. In this study, chlorine dioxide (ClO 2 ), a high-efficiency, low-toxicity, and environmentally benign disinfectant, was used for microorganism surface modification to enhance the mechanical stability and metal ion adsorption of the cell. ClO 2 can either modify cell walls to improve their metal adsorption capacity or modify cell membranes to improve their mechanical stability. Fourier-transform infrared spectroscopy analysis indicated that several cell surface groups were involved in the cell wall modification of Bacillus sp. Microscopic observation indicated that ClO 2 treatment could deter cell membranes from forming vesicles in sodium hydroxide (NaOH) aqueous solution, and freeze-etching showed that ClO 2 treatment could alter the erythrocyte membrane proteins which might also contribute to improving the cell stability. The experimental results on Bacillus sp., Pseudomonas aeruginosa , and Mucor rouxii show that ClO 2 treatment may increase, or at least not reduce, the ability of microbial cells to adsorb heavy metals, but it can significantly improve the resistance of these cells to NaOH cleavage. It seems ClO 2 is a promising auxiliary for biosorption of heavy-metal ions.

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“…The study of sorption performances of Arthrobacter sp. dispersed in aqueous solution (Veglio' et al, 1997b) and inside the polymer network of a macro-and microporous cross-linked resin based on poly(hydroxyethyl methacrylate) (polyHEMA)-trimethylolpropane tri-methacrylate (TMPTM) (Veglio' et al, 1997a) has already been reported. Arthrobacter sp.…”

Section: Introductionmentioning

confidence: 99%

Kinetic Modeling of Copper Biosorption by Immobilized Biomass

Vegliò

Beolchini

Toro

1998

Ind. Eng. Chem. Res.

Self Cite

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The kinetic modeling of copper biosorption by Arthrobacter sp. immobilized in a hydroxyethyl methacrylate-based matrix is reported in this work. The resin−biomass complex (RBC) has been used for copper biosorption in different conditions according to a factorial experiment. Factors investigated were cross-linker (trimethylolpropane trimethacrylate) concentration, biomass concentration in the solid, and particles' granulometry. A maximum copper specific uptake of about 7 mg of Cu/g of biomass (dry weight) has been observed, in the case of a RBC with the following characteristics: 2% (w/w) cross-linker concentration, 8% (w/w) biomass concentration, and 425−750 μm granulometry. The shrinking core model has been used for the fitting of experimental data. A good fit has been found in the case of controlling intraparticle diffusion in all experimental trials. The copper diffusion coefficient in RBC has been estimated from the slope of the regression lines. Values obtained for the diffusion coefficients do not differ from one another with respect to the estimated standard error. An average apparent copper diffusion coefficient of about 3 × 10-6 cm2 /s has been found.

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Polyhydroxoethylmethacrylate (polyHEMA) -trimethylolpropanetrimethacrylate ( (TMPTM) as a support for metal biosorption with Arthrobacter sp.

Cited by 17 publications

References 8 publications

Biosorption of Metal Ions Using Chitosan, Chitin, and Biomass of Rhizopus Oryzae

Biosorption of Metal Ions Using Chitosan, Chitin, and Biomass of Rhizopus Oryzae

Application of Chlorine Dioxide in Cell Surface Modification to Enhance Its Mechanical Stability and Metal Ion Adsorption

Kinetic Modeling of Copper Biosorption by Immobilized Biomass

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