Biosorption of uranium (VI) by immobilized Aspergillus fumigatus beads

Wang, Jingsong; Hu, Xinjiang; Liu, Yunguo; Xie, Shuguang; Bao, Zheng-lei

doi:10.1016/j.jenvrad.2010.03.002

Cited by 122 publications

(30 citation statements)

References 27 publications

(21 reference statements)

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“…It can be seen that the primary fast phase of biosorption by dead biomass occurred within the first 20 min and this was followed by second slow phase until equilibrium. A similar trend was observed (Wang et al, 2010). Equilibrium time was found to be 30 min.…”

Section: Contact Timesupporting

confidence: 86%

An Investigation on Tolerance and Biosorption Potential of Aspergillus awamori ZU JQ 965830.1 to Cu(II)

2013

Egypt. J. Microbiol.

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HE MINIMUM inhibitory concentration (MIC) value of ……A.awamori for Cu(II) was 3100mg/l and a complete inhibition of biomass production was observed at 800mg/l concentration of Cu(II). Slight changes were observed by SEM investigation in Cu(II)-stressed biomass. Quantification of Cu(II) was performed by EDAX. Transmission electron microscopy investigation (TEM) confirmed the involvement of extracellular adsorption, intracellular penetration through the cell wall and vacuolation. Cu(II) stress induced noticeable changes in the activities of polyphenol oxidase(PPO), glutathione reductase (GR) and peroxidase (POD) and in the concentration of total antioxidant, soluble protein and thiol. High performance liquid chromatography analysis (HPLC) revealed that Cu(II) stress stimulated the production of oxalic acid .Maximum Cu(II) uptake capacity was achieved at pH 4.0, initial metal ion concentration 500mg/l and biomass dosage 1g/l. Maximum Cu(II) uptake capacities were reached after 180 min for live biomass and 30 min for dead biomass. Fourier transform infrared spectroscopy (FTIR) results gave an indicateion of chelation between oxygen-, nitrogen-, phosphorus-and especially sulphur-containing ligands of biomass with metal ions. X-ray diffraction analysis (XRD) revealed the presence of CuSO 4 .H 2 O in live and dead biomass. EDAX confirmed the occurrence of sulphur, oxygen and Cu(II) in the cell wall.Keywords: Aspergillus awamor;, Cu(II), Stress, Antioxidant enzymes, Biosorption.Several inorganic and organic compounds such as heavy metals, fuels and petroleum industry products cause soil and water contamination. For this reason, research focused toward better decontamination methods and the development of new technologies is imperative (Velásquez & Dussan, 2009).Remediation methods for heavy metals differ from those for organic compounds. As compared to organic compounds, metals are non-biodegradable (Gupta & Rastogi, 2008). Therefore, biomobilization is a valid concept in the management of metal pollution. Some metal ions, like Cu(II) and Zn(II) are essential for biological processes, but other nonessential metals like Cd(II) and Hg(II) are considered highly toxic elements to nearly all organisms even at low MANAL T. EL-SAYED Egypt. J. Microbiol. 48(2013) 24concentrations (Guelfi et al., 2003). However, Cu(II) is toxic to most organisms at elevated concentrations, largely through enzyme inhibition and oxidation of membrane components as a result of the ability of Cu(II) to generate toxic hydroxyl radicals (Melo et al., 2004). Membrane damage then leads to rapid leakage of ions and other low molecular weight compounds (Soares et al., 2003).Various techniques such as precipitation, coagulation, ion exchange, reverse osmosis, evaporation, filtration, electrochemical treatment and oxidation and reduction have been employed to remove toxic heavy metals from industrial wastewaters. Most of these techniques are ineffective or extremely expensive in terms of energy and reagent consumption, especially when concentrations of diss...

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Section: Contact Timesupporting

confidence: 86%

An Investigation on Tolerance and Biosorption Potential of Aspergillus awamori ZU JQ 965830.1 to Cu(II)

2013

Egypt. J. Microbiol.

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“…The smaller the size, greater would be the chances of aggregation. Similarly biosorption of U(VI) by immobilized Aspergillus fumigatus beads decreased from 7.2 to 1.7 mg/g when the adsorbent dose is increased from 1 to 3.5 % (Wang et al 2010). …”

Section: Effect Of Biosorbent Dosementioning

confidence: 95%

“…The band near 1,000/cm may be assigned to stretching vibration of C=O group in the bonding. The IR spectral analysis before and after uranium loading indicated that the key components and structure remained integral; however, there is a substantial decrease in the intensity at 1,700-1,500/cm which is due to -NH bending and 3,600-3,400/cm due to -OH and -NH groups (Wang et al 2010). The decrease in absorption intensity in these regions after adsorption of uranium indicated that hydroxyl, carboxyl and -NH group are involved in uranium binding.…”

Section: Infrared and Edax Analysesmentioning

confidence: 97%

“…Some low-cost biosorbents such as sargassum biomass (Yang and Volesky 1999), water hyacinth (Bhainsa and D'Souza 2001), algal biomass (Kalin et al 2005), banyan leaves, red algae (Bhat et al 2008), alginate beads (Gok and Aytas 2009), Aspergillus fumigatus (Wang et al 2010), citrus biomass (Saleem and Bhatti 2011), pine saw dust (Zou and Zhao 2012), etc. have been exploited for various workers.…”

Section: Introductionmentioning

confidence: 99%

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Removal of uranium(VI) from aqueous solutions using Eucalyptus citriodora distillation sludge

Bhatti

Hamid

2013

Int. J. Environ. Sci. Technol.

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Adsorption and desorption of uranium(VI) from dilute aqueous solutions by Eucalyptus citriodora distillation sludge was studied in a batch mode. The potential of Eucalyptus citriodora distillation sludge to remove uranium(VI) from aqueous solutions has been investigated at different conditions of solution pH, metal ion concentrations, biosorbent dosage, biosorbent particle size, contact time and temperature. The results indicated that biosorption capacity of Eucalyptus citriodora distillation sludge was strongly affected by the medium pH, the biosorbent dose, metal ion concentrations and medium temperature. Reduction in particle size increased the biosorption capacity. Langmuir and Freundlich isotherm models were applied to biosorption data to determine the biosorption characteristics. An optimum biosorption capacity (57.75 mg/g) was achieved with pH 4.0, particle size 0.255 mm, biosorbent dose 0.5 g/100 mL and initial uranium(VI) concentration of 100 mg/L. Uranium(VI) removal by Eucalyptus citriodora distillation sludge was rapid, the equilibrium was established within 60 min and pseudo-second-order model was found to fit with the experimental data. The biosorption process decreased with an increase in the temperature indicating its exothermic nature. Pretreatments of biomass with different reagents affected its biosorption capacity. A significant increase (34 %) in biosorption capacity (83.25 mg/g) was observed with benzene treatment. Fourier-transform infra-red studies showed the involvement of carbonyl, carboxyl and amide groups in the biosorption process. The results indicated that sulfuric acid had the best effects as an eluent showing 93.24 % desorption capacity.

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“…SEM micrographs of powdered dead fungal biomass showed a smooth surface before adsorption (Figure 8a) and after Pb adsorption, the surface of the biomass appeared to be prominently rough as it was covered with many clusters of small Pb crystals (Figure 8b). Wang et al (2010) showed the SEM images of biosrption of uranium (IV) by immobilized A fumigatus beads. Chakravarty et al (2010) studied the biosorption of Pb(II) by native and Pb loaded bael leaves.…”

Section: Scanning Electron Microscope (Sem) and Energy Dispersive X-rmentioning

confidence: 99%

Process optimization and mechanistic studies of lead (II): Aspergillus caespitosus interaction for industrial effluent treatment

Aftab¹,

Akhtar²,

Jabbar³

et al. 2012

Afr. J. Biotechnol.

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The lead (II) accumulation potential of various biosorbent had been widely studied in the last few years, but an outstanding Pb(II) accumulating biomass still seems crucial for bringing the process to a successful application stage. This investigation describes the use of non-living biomass of Aspergillus caespitosus for removal of Pb from Pb(NO 3 ) 2 solution in a batch system under different experimental conditions. The highest Pb(II) sorption (351.7 ± 5.7 mg/g biomass) was observed at 600 µg/ml initial Pb concentration. Biosorption data were well defined by pseudo-second order, saturation mixed order and Langmuir isotherm models. The thermodynamic parameters: G (303 K), H and S were determined to be 4.64 kJ/mol, 75.4 kJ/mol and 26.2 J/mol-K respectively. The Pb uptake from binary solution was inhibited in the order of copper > nickel > zinc > manganese. Fourier transform infrared spectroscopy (FT-IR) characterization of Pb biosorption revealed the involvement of -SO 3 and -CN groups along with other groups. The biosorbed Pb was stripped out (85.5%) using 0.01 M HCl and about 12% loss in Pb(II) sorption capacity was observed after five sorption-desorption cycles. High Pb (II) uptake (351.7 ± 5.7 mg/g biomass) by A. caespitosus proved it to be an outstanding biomaterial until now reported in literature for accumulating from solutions.

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Biosorption of uranium (VI) by immobilized Aspergillus fumigatus beads

Cited by 122 publications

References 27 publications

An Investigation on Tolerance and Biosorption Potential of Aspergillus awamori ZU JQ 965830.1 to Cu(II)

An Investigation on Tolerance and Biosorption Potential of Aspergillus awamori ZU JQ 965830.1 to Cu(II)

Removal of uranium(VI) from aqueous solutions using Eucalyptus citriodora distillation sludge

Process optimization and mechanistic studies of lead (II): Aspergillus caespitosus interaction for industrial effluent treatment

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