Fungal processes for bioremediation of toxic metal and radionuclide pollution

“…The experiments were conducted in shake flasks and the leaching of different metals such as Al, Cd, Cr, Cu, Zn and Mn present in fly ash was determined. Gadd et al [10] endorsed employing A. niger in bioremediation of radionuclide pollution. They also mentioned that, the process commercially is not yet feasible.…”

Section: Introductionmentioning

confidence: 99%

Bioleaching of heavy metals from a low-grade mining ore using Aspergillus niger

Mulligan

Kamali

Gibbs

2004

Journal of Hazardous Materials

148

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“…Fungi are ubiquitous in the natural environment (Gadd et al 1999). They have been well-studied for their capacity to chelate, adsorb, and biosynthesize heavy metals deposited in the environment (Malik 2004).…”

Section: Discussionmentioning

confidence: 99%

Effect of Copper(II), Lead(II), and Zinc(II) on Growth and Sporulation of Halophytophthora from Taiwan Mangroves

Leaño

Pang

2010

Water Air Soil Pollut

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This study evaluated the effect of lead (Pb (II)), zinc (Zn(II)) and copper (Cu(II)) on growth and sporulation of four Halophytophthora species (Halophytophthora vesicula, Halophytophthora elongata, Halophytophthora spinosa var. lobata, and an oogonia-producing Halophytophthora sp.) isolated from different mangrove sites in Taiwan. Results show that all isolates grew well or even better at 1 ppm concentration of the heavy metals tested. Growth of all test isolates was totally inhibited at 500 ppm, except for H. spinosa var. lobata exposed to Zn(II). For sporulation, all isolates produced moderate to abundant zoosporangia or oogonia at 1 ppm Pb(II) and Zn(II). Production of zoosporangia by H. vesicula, H. elongata and H. spinosa var. lobata was significantly affected or totally inhibited at 1 ppm Pb (II) and Zn(II) and all concentrations of Cu(II). Abnormal oogonia were produced by Halophytophthora sp. at 10 ppm Cu(II) and 100 ppm of the three heavy metals. In general, Cu(II) and Zn(II) were found to be the most toxic, and the least toxic was Pb (II). H. spinosa var. lobata was the most tolerant to all the heavy metals, while H. vesicula and H. elongata were the most sensitive. Results of this study shows that increased concentrations of Pb(II), Cu(II), and Zn (II) in the mangrove environment can significantly affect growth and impair normal reproduction of Halophytophthora species.

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“…In addition Na, Pb and Cr peaks indicate the binding of metal ions onto the BPMB surface. So, the SEM Calcium alginate as an eco-friendly supporting material 7 micrograph demonstrated the highest affinity for metal ions by BPMB [50][51][52].…”

Section: Examination Of Biosorbent By Scanning Electron Microscope (Sem)mentioning

confidence: 99%

Calcium alginate as an eco-friendly supporting material for Baker’s yeast strain in chromium bioremediation

Mahmoud

Mohamed

2017

HBRC Journal

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In this study, Baker's yeast strain (Saccharomyces cerevisiae) biomass was immobilized in alginate extract 3% forming Biomass/Polymer Matrices Beads (BPMB). These beads were investigated for chromium biosorption from aqueous solution. Factors such as solution pH, contact times, temperature values, stirring rates, BPMB dosages and initial chromium ions concentrations were experimentally tested using repeated-batch process to determine the sorption capacity for chromium (VI) ions. Batch experiments were conducted at pH range from 1.5 to 7.5. The optimum pH value was 3.5 for direct chromium removal. The effect of chromium concentration was studied using different concentrations from 200 to 1000 ppm. Freundlich's isothermal model showed better representation of data than Langmuir's isothermal model with correlation coefficient 0.922. The maximum biosorption capacity of chromium was found to be 154 mg g À1 at initial concentration 200 ppm under optimum conditions. At the end of the experiments, BPMB were investigated for chromium biosorption from tannery effluent sample. Results showed decrease in chromium concentration up to 85%. The availability of recycling of the BPMB was also studied for three subsequent cycles. The surface sequestration of metal ions by BPMB was characterized before and after metal binding using a scanning electron microscope (SEM) equipped with an energy dispersive X-ray analysis (EDXA) and FTIR spectroscopy in order to determine the mechanisms of chromium biosorption. ª 2015 The Authors. Production and hosting by Elsevier B.V. on behalf of Housing and Building National Research Center. This is an open access article under the CC BY-NC-ND license (http:// creativecommons.org/licenses/by-nc-nd/4.0/).

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Fungal processes for bioremediation of toxic metal and radionuclide pollution

Cited by 11 publications

References 0 publications

Bioleaching of heavy metals from a low-grade mining ore using Aspergillus niger

Bioleaching of heavy metals from a low-grade mining ore using Aspergillus niger

Effect of Copper(II), Lead(II), and Zinc(II) on Growth and Sporulation of Halophytophthora from Taiwan Mangroves

Calcium alginate as an eco-friendly supporting material for Baker’s yeast strain in chromium bioremediation

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