Effective Elimination of Hazardous Chromium (VI) Using Periodic Elements and Contemporary Adsorption Methods by Using Magnesium Ferrite Nanoparticle: A Review — Oak Academic Publishing
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Effective Elimination of Hazardous Chromium (VI) Using Periodic Elements and Contemporary Adsorption Methods by Using Magnesium Ferrite Nanoparticle: A Review
Department of Soil and Environmental Sciences, University of Barishal, Barishal, Bangladesh
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Department of Soil and Environmental Sciences, University of Barishal, Barishal, Bangladesh
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Department of Soil and Environmental Sciences, University of Barishal, Barishal, Bangladesh
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Department of Soil and Environmental Sciences, University of Barishal, Barishal, Bangladesh
1 Department of Soil and Environmental Sciences, University of Barishal, Barishal, Bangladesh
2 Department of Soil and Environmental Sciences, University of Barishal, Barishal, Bangladesh
3 Department of Soil and Environmental Sciences, University of Barishal, Barishal, Bangladesh
4 Department of Soil and Environmental Sciences, University of Barishal, Barishal, Bangladesh
A well-known hazardous metal and top contaminant in wastewater is hexavalent chromium. The two forms of most commonly found chromium are chromate (<math display='inline' xmlns='http://www.w3.org/1998/Math/MathML'> <mrow> <msubsup> <mrow> <mtext>CrO</mtext></mrow> <mn>4</mn> <mrow> <mn>2</mn><mo>−</mo></mrow> </msubsup> </mrow> </math> ) and dichromate (<math display='inline' xmlns='http://www.w3.org/1998/Math/MathML'> <mrow> <msub> <mrow> <mtext>Cr</mtext></mrow> <mn>2</mn> </msub> <msubsup> <mtext>O</mtext> <mn>7</mn> <mrow> <mn>2</mn><mo>−</mo></mrow> </msubsup> </mrow> </math> ). Leather tanning, cooling tower blow-down, plating, electroplating, rinse water sources, anodizing baths etc. are the main sources of Cr (VI) contamination. The Cr (VI) is not only non-biodegradable in the environment but also carcinogenic to living population. It is still difficult to treat Cr contaminated waste water effectively, safely, eco-friendly, and economically. As a result, many techniques have been used to treat Cr (VI)-polluted wastewater, including adsorption, chemical precipitation, coagulation, ion-exchange, and filtration. Among these practices, the most practical method is adsorption for the removal of Cr (VI) from aqueous solutions, which has gained widespread acceptance due to the ease of use and affordability of the equipment and adsorbent. It has been revealed that Fe-based adsorbents’ oxides and hydroxides have high adsorptive potential to lower Cr (VI) content below the advised threshold. Fe-based adsorbents were also discovered to be relatively cheap and toxic-free in Cr (VI) treatment. Fe-based adsorbents are commonly utilized in industry. It has been discovered that nanoparticles of Fe-, Ti-, and Cu-based adsorbents have a better capacity to remove Cr (VI). Cr (VI) was effectively removed from contaminated water using mixed element-based adsorbents (Fe-Mn, Fe-Ti, Fe-Cu, Fe-Zr, Fe-Cu-Y, Fe-Mg, etc.). Initial findings suggest that Cr (VI) removal from wastewater may be accomplished by using magnesium ferrite nanomaterials as an efficient adsorbent.
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