A Detailed Laboratory Scale Feasibility Study of Recovering Metallic Iron and Chromium from Chromium Contaminated Soils

Meegoda, Jay N.; Kamolpornwijit, Wiwat; Batagoda, Janitha H.

doi:10.1007/s40098-016-0208-4

Cited by 5 publications

(3 citation statements)

References 18 publications

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“…Recent developments in the understanding of the conventional process emphasize various methods such as thermal treatment [27], desalination [28], direct reduction [29,30], resin adsorption [31,32,214,217], electrolysis [33,34], electrocoagulation [35,36], activated carbon adsorption [212,213], composite ceramic adsorption [37,215,218], carbon nano fibers adsorption [211,216], nano materials catalyzed reduction [38,39], and catalytic reduction [40,41]. The conventional processes are complex due to the different intensive sub-processes and use of large amounts of chemicals and generation of toxic sludges.…”

Section: Comparison Of Conventional and Bioremediation Methodsmentioning

confidence: 99%

“…The conventional processes are complex due to the different intensive sub-processes and use of large amounts of chemicals and generation of toxic sludges. [13,42,43] Carbothermal reduction of Cr(VI) was conducted by adding carbon at temperature ranging from 1000 to 1400 o C in a TGA apparatus with particle size limitation of the Cr(VI) contaminated soil sample [27]. To achieve a complete reduction 15% carbon was added to soil, however, evaluation of CO2 emission was ignored during the process.…”

Section: Comparison Of Conventional and Bioremediation Methodsmentioning

confidence: 99%

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Recent bioreduction of hexavalent chromium in wastewater treatment: A review

Pradhan

Sukla

Sawyer

et al. 2017

Journal of Industrial and Engineering Chemistry

355

125

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Hexavalent chromium (Cr(VI)) in water is a proven carcinogen to different internal and external organs of the living organisms. There are different human activities incorporated to the anthropogenic sources in the environment enriching Cr(VI) of high concentration in the water system above the regulatory level. The physical, chemical and biological properties of chromium favour the dissolution in the water environment. This concerns the environmental researcher to tackle and mitigate. Chemical or biological techniques or a combination of the two have been used to remove Cr(VI) from polluted waters. Biological techniques include integrated bioremediation, such as the primary processes of direct bioreduction and biosorption, and secondary processes of microbial fuel cell, biostimulation, surface modified dry biomass and biochar adsorption, and engineered biofilm and cell free reductase. These techniques are used by a wide range of living organisms including bacteria, fungi, plants, plant leaves, plant nuts and algae. This group of living organisms transform and remove Cr(VI) from water during the cellular metabolisms, extracellular activities, physical and chemical adsorptions on the cell surface, and photosynthesis. Variation of different physical, chemical and environmental parameters affecting the efficiency of the bioremediation process have impacted on the design of bioreactors. There has been a recent development of a microbial fuel cell which use the proximity of Cr(VI) reduction as a cathode half cell for the generation of renewable energy and simulation of its' removal from water.

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Section: Comparison Of Conventional and Bioremediation Methodsmentioning

confidence: 99%

Section: Comparison Of Conventional and Bioremediation Methodsmentioning

confidence: 99%

Recent bioreduction of hexavalent chromium in wastewater treatment: A review

Pradhan

Sukla

Sawyer

et al. 2017

Journal of Industrial and Engineering Chemistry

355

125

View full text Add to dashboard Cite

show abstract

“…In carbothermal reduction method, the hexavalent chromium-polluted soil is mixed with carbon at high temperature (1000-1400°C) in a thermogravimetric analysis (TGA) apparatus (Meegoda et al 2017). Complete reduction of hexavalent chromium is achieved by adding 15% carbon into the soil, and the resultant emission of CO 2 was overlooked during the procedure.…”

Section: Conventional Methodsmentioning

confidence: 99%

Successive use of microorganisms to remove chromium from wastewater

Elahi

Arooj

Bukhari

et al. 2020

Appl Microbiol Biotechnol

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Heavy metal pollution is a direct consequence of the extensive utilization of heavy metals in various industrial processes. The persistence and nondegradability of heavy metals cause them to bioaccumulate in nature, and when they come in direct contact with the pristine environment, they not only contaminate it severely but also pose dire consequences to the health of all living forms on earth, including humans. Chromium (Cr) is one of the heavy metals which has been extensively used in various industrial processes such as mining, alloy manufacturing, tanning of hides and skins, pigment production, etc. However, it is regarded as a priority pollutant due to its highly toxic, teratogenic, mutagenic, and carcinogenic nature, and the U.S. Environmental Protection Agency (EPA) also categorized it into group "A" human carcinogen. In contrast to water-soluble hexavalent chromium (Cr 6+), its reduced form, trivalent chromium (Cr 3+), is relatively benign and readily precipitated at environmental pH. Thus, bioremediation of Cr 6+ through microorganisms including bacteria, yeast, and algae provides a promising approach to decontaminate a metal-polluted environment. This review describes an overview of the microbial reduction of Cr 6+ , resistance mechanism, and the antioxidant profiling exhibited by these microorganisms when exposed to Cr 6+. It also describes the pilot-scale study of the successive use of bacterial, fungal, and algal strains and the subsequent use of microbially purified water for the cultivation of plant growth. Multiple metal-resistant microorganisms are a good bioresource for green chemistry to eradicate environmental Cr 6+. Key Points • Hexavalent chromium (Cr 6+) is highly toxic for living organisms including humans. • Microbial Cr resistance is mediated at the genetic, proteomic, and molecular levels. • Successive use of microorganisms is the best strategy to exterminate Cr 6+ from the environment.

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Bioreduction of Hexavalent Chromium Using Microalgae

Pradhan

Sukla

2018

The Role of Microalgae in Wastewater Treatment

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A Detailed Laboratory Scale Feasibility Study of Recovering Metallic Iron and Chromium from Chromium Contaminated Soils

Cited by 5 publications

References 18 publications

Recent bioreduction of hexavalent chromium in wastewater treatment: A review

Recent bioreduction of hexavalent chromium in wastewater treatment: A review

Successive use of microorganisms to remove chromium from wastewater

Bioreduction of Hexavalent Chromium Using Microalgae

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