Iron oxide waste to clean arsenic-contaminated water

Randhawa, N S; Murmu, Nisha; Tudu, Shakuntala; Sau, D C

doi:10.1007/s10311-014-0477-z

Cited by 18 publications

(8 citation statements)

References 15 publications

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“…Randhawa et al studied iron oxide (hematite and magnetite) collected from a steel plant. These iron oxide wastes have dual advantage of negligible cost of preparation as well as lowered potential environmental hazards due to the waste.…”

Section: As Removal Methodsmentioning

confidence: 99%

“…It was shown that lignite was the most effective adsorbent for As(V) followed by bentonite, shale, and iron sand and the amounts of As(III) adsorbed on all adsorbents were lower than those of As(V). Randhawa et al [85] studied iron oxide (hematite and magnetite) collected from a steel plant. These iron oxide wastes have dual advantage of negligible cost of preparation as well as lowered potential environmental hazards due to the waste.…”

Section: Adsorptionmentioning

confidence: 99%

“…2, such as zeolite [77,80], chitosan beads [76,79], magnetite nanoparticles [74], iron-oxide coated natural rock [75], other geological adsorbents like lignite, bentonite, shale, and iron sand [78], submerged plant Hydrilla verticilata [108], certain bacterial, and fungal species like Bacillus cereus [112,134], Saccharomyces cerevisiae [111], Rhodococcus sp. [135], Staphylococcus xylosus [90], fruit and plant waste like orange peels [115], Rhazia sticta herb [117], Moringa oleifera [122], herbal dye waste of Rosa rosa [119], industrial waste (hematite) [85] have been found to be best fit with the Langmuir model for the adsorption of As.…”

Section: Langmuir Isotherm Modelmentioning

confidence: 99%

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Review on Biosorption of Arsenic From Contaminated Water

Dadwal

Mishra

2017

CLEAN Soil Air Water

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Arsenic contamination in water is a worldwide problem. It is spreading in the environment as a result of numerous natural and anthropogenic sources having a massive influence on health of human and ecological systems. In order to mitigate this problem, there are various conventional technologies available for the removal of arsenic like oxidation, coagulation and flocculation, ion exchange, and membrane processes. However, there are various limitations associated with these techniques such as high cost and generation of toxic byproducts due to which attention has been paid to biosorption in the past few years, as it is an eco‐friendly as well as cost‐effective technique. Arsenic biosorption by various low‐cost adsorbents and biosorbents such as activated carbons, algae, submerged plants, bacteria, fungi, plant, and fruit wastes have been surveyed and critically reviewed in this paper along with their sorption efficiencies. Furthermore, the nonlinear models of adsorption dynamics and thermodynamic feasibility of arsenic biosorption together with detailed analysis of biological mechanisms of arsenic ion uptake by bacteria, fungi and algae has been discussed in detail in the present work. Alternatives of disposal of arsenic loaded sludge obtained after the biosorption of arsenic has also been addressed.

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Section: As Removal Methodsmentioning

confidence: 99%

Section: Adsorptionmentioning

confidence: 99%

Section: Langmuir Isotherm Modelmentioning

confidence: 99%

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Review on Biosorption of Arsenic From Contaminated Water

Dadwal

Mishra

2017

CLEAN Soil Air Water

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“…Lead discharges into aqua-environment present a special concern, since this metal is bounded to bioaccumulation and excessive concentrations of lead are associated with various diseases in humans and animals (Issabayeva et al 2006;Okoro and Ejike 2007;Zhang et al 2010). Unacceptable concentrations of arsenic (Randhawa et al 2014), lead (Gundogdu et al 2009), cadmium (Anwar et al 2010), copper (Li et al 2003), etc., are of serious concerns in many developing nations of the globe.…”

Section: Introductionmentioning

confidence: 98%

Efficient lead sorption from wastewater by carbon nanofibers

et al. 2015

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Wastewater from many industries contains toxic metal ions, which should be removed before water is released into the environment. Many adsorbents have been developed to remove metals, but their efficiency should be improved by, e.g., increasing surface area. Here, we tested the use of carbon nanofibers synthesized on the surface of activated carbon, to remove lead ions (Pb 2? ). We studied the effect of carbon nanofiber dose, pH, contact time and agitation speed on the sorption capacity. The best conditions were with nanofiber dose of 0.25 g/L, pH of 5.5, contact time of 60 min and agitation speed of 200 rpm. The nanocomposite product was also used for the removal of lead from industrial wastewater. We also found a successful removal of 67 % of lead ions from semiconductor wastewater sample.

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“…Arsenic mainly originates from 8 weathering reactions, bio-logical activities, geochemical reactions, 9 volcanic emissions and also from some anthropogenic sources 10 including mining, glass processing, insecticides, pesticides and 11 landfill leaching [1]. Exposure of arsenic in drinking water 12 probably brings the greatest threat to human health [2].…”

mentioning

confidence: 99%