Speciation and Selective Biosorption of Cr(III) and Cr(VI) Using Nanosilica Immobilized-Fungi Biosorbents

Mahmoud, Mohamed E.; Yakout, Amr A.; Abdel-Aal, Hany; Osman, Maher M.

doi:10.1061/(asce)ee.1943-7870.0000899

Cited by 23 publications

(20 citation statements)

References 32 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Numerous technologies have already been applied in the removal of Cr(VI) from aqueous solutions. These include adsorption, biosorption, ion-exchange, foam flotation, electrolysis, surface adsorption precipitation, reverse osmosis, sand filtration, chemical reduction/oxidation, electrochemical precipitation, membrane filtration and solvent extraction [27][28][29][30].…”

Section: Methodsmentioning

confidence: 99%

Cyclic Sequential Removal of Alizarin Red S Dye and Cr(VI) Ions Using Wool as a Low-Cost Adsorbent

et al. 2020

View full text Add to dashboard Cite

Alizarin red S (ARS) removal from wastewater using sheep wool as adsorbent was investigated. The influence of contact time, pH, adsorbent dosage, initial ARS concentration and temperature was studied. Optimum values were: pH = 2.0, contact time = 90 min, adsorbent dosage = 8.0 g/L. Removal of ARS under these conditions was 93.2%. Adsorption data at 25.0 °C and 90 min contact time were fitted to the Freundlich and Langmuir isotherms. R2 values were 0.9943 and 0.9662, respectively. Raising the temperature to 50.0 °C had no effect on ARS removal. Free wool and wool loaded with ARS were characterized by Fourier Transform Infrared Spectroscopy (FTIR). ARS loaded wool was used as adsorbent for removal of Cr(VI) from industrial wastewater. ARS adsorbed on wool underwent oxidation, accompanied by a simultaneous reduction of Cr(VI) to Cr(III). The results hold promise for wool as adsorbent of organic pollutants from wastewater, in addition to substantial self-regeneration through reduction of toxic Cr(VI) to Cr(III). Sequential batch reactor studies involving three cycles showed no significant decline in removal efficiencies of both chromium and ARS.

show abstract

Section: Methodsmentioning

confidence: 99%

Cyclic Sequential Removal of Alizarin Red S Dye and Cr(VI) Ions Using Wool as a Low-Cost Adsorbent

et al. 2020

View full text Add to dashboard Cite

show abstract

“…The time to reach adsorption equilibrium under the experimental conditions was 15 min. A potential for speciation analysis and selective extraction of Cr(III) and Cr(VI) ions from aqueous effluents was indicated [75].…”

Section: Immobilized Fungus Biosorbentsmentioning

confidence: 99%

Immobilized microbial biosorbents for heavy metals removal

Velkova

Kirova

Stoytcheva

et al. 2018

Engineering in Life Sciences

View full text Add to dashboard Cite

Intensive industrial and urban growth has led to the release of increasing amounts of environmental pollutants. Contamination by metals, in particular, deserves special attention due to their toxicity and potential to bioaccumulate via the food chain. Conventional techniques for the removal of toxic metals, radionuclides and precious metals from wastewater all have a number of drawbacks, such as incomplete metal extraction, high cost and risk of generating hazardous by‐products. Biosorption is a cost‐effective and environment‐friendly technology, an alternative to conventional wastewater treatment methods. Biosorption is a metabolically independent process, in which dead microbial biomass is capable of removal and concentrating metal ions from aqueous solutions. Free microbial biosorbents are of small size and low density, insufficient mechanical stability and low elasticity, which causes problems with metal ion desorption, separation of the sorbent from the medium and its regeneration. Hence, the possibilities for the implementation of continuous biosorbent processes for metal removal in flow‐type reactor systems are reduced and the practical application of biosorption in industrial conditions is limited. By immobilizing microbial biomass on suitable carriers the disadvantages of free biosorbents are eliminated and more opportunities for practical use of biosorption become available. This review examines different immobilization techniques and carriers, certain basic features and possibilities of using immobilized microbial biosorbents for the removal and concentration of metals from aqueous solutions.

show abstract

“…29 In order to overcome the drawbacks of conventional techniques, biosorption with SPE has been proposed for the removal and preconcentration of Cr ions. 37 Aspergillus ustus (Asp), Fusarium verticillioides (Fus),…”

Section: Diniz and Tarleymentioning

confidence: 99%

Speciation of trace metals and metalloids by solid phase extraction with spectrometric detection: a critical review

Türker¹

2016

Turk J Chem

View full text Add to dashboard Cite

Considerable interest is continuing to be shown in the speciation of metals, metalloids, and organometals due to the dependence of their toxicity and mobility on their chemical form. This review focuses on the speciation analysis of metals, metalloids, and organometals by solid phase extraction before spectrometric detection, and all aspects of analytical speciation such as determination of oxidation states and organometallic compounds. Some applications of speciation of metals and metalloids are also presented and discussed in this review. Fractionation, which is used sometimes as speciation, and chromatographic detection are not discussed. This review covers approximately the last four years ( -March 2016, offering a critical review of the speciation of metals, metalloids, and organometals.

show abstract

Speciation and Selective Biosorption of Cr(III) and Cr(VI) Using Nanosilica Immobilized-Fungi Biosorbents

Cited by 23 publications

References 32 publications

Cyclic Sequential Removal of Alizarin Red S Dye and Cr(VI) Ions Using Wool as a Low-Cost Adsorbent

Cyclic Sequential Removal of Alizarin Red S Dye and Cr(VI) Ions Using Wool as a Low-Cost Adsorbent

Immobilized microbial biosorbents for heavy metals removal

Speciation of trace metals and metalloids by solid phase extraction with spectrometric detection: a critical review

Contact Info

Product

Resources

About