Hydrometallurgical valorization of chromium, iron, and zinc from an electroplating effluent

Ishfaq, Ayesha; Ilyas, Sadia; Yaseen, Arslan; Farhan, Muhammad

doi:10.1016/j.seppur.2018.09.050

Cited by 32 publications

(9 citation statements)

References 39 publications

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“…But, its path to secondary resource development and recovery has slowed in industries. Recovery of toxic metals from wastewaters is one of the needs of environmental refinement done by various processes 10 – 14 . The use of the solvent extraction process has expanded with environmentally friendly solvents 15 , 16 .…”

Section: Introductionmentioning

confidence: 99%

Recycling of zinc ions in disc-donut column considering forward mixing mass transfer, and effects of pulsed and non-pulsed condition

Asadollahzadeh

Torkaman

Torab‐Mostaedi

et al. 2022

Sci Rep

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The current study focuses on the recovery of zinc ions by solvent extraction in the pulsed contactor. The Zn(II) ions from chloride solution were extracted into the organic phase containing di-(2-ethylhexyl) phosphoric acid (D2EHPA) extractant. The resulting data were characterized for the relative amount of (a) pulsed and no-pulsed condition; and (b) flow rate of both phases. Based on the mass balance equations for the column performance description, numerical computations of mass transfer in a disc-donut column were conducted and validated the experimental data for zinc extraction. Four different models, such as plug flow, backflow, axial dispersion, and forward mixing were evaluated in this study. The results showed that the intensification of the process with the pulsed condition increased and achieved higher mass transfer rates. The forward mixing model findings based on the curve fitting approach validated well with the experimental data. The results showed that an increase in pulsation intensity, as well as the phase flow rates, have a positive impact on the performance of the extractor. In contrast, the enhancement of flow rate led to the reduction of the described model parameters for the adverse phase.

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Section: Introductionmentioning

confidence: 99%

Recycling of zinc ions in disc-donut column considering forward mixing mass transfer, and effects of pulsed and non-pulsed condition

Asadollahzadeh

Torkaman

Torab‐Mostaedi

et al. 2022

Sci Rep

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“…However, Li extraction also increased above pH eq 5.0, being > 3% at pH eq 6.0. Such phenomena can be corroborated by the order of stability below olation in the aqueous phase and a greater hydrolysis constant (pK a ) of Co 2+ than that of Li + speciation of metal ions [40][41][42][43]. At the optimal pH eq 5.0, extraction efficiencies of Co and Li were 88.2% and 0.7%, respectively.…”

Section: Solvent Extraction Of Cobalt With Na-cyanex 272mentioning

confidence: 87%

Recycling of end-of-life LiNixCoyMnzO2 batteries for rare metals recovery

Sattar

Ilyas

Kousar

et al. 2019

Environmental Engineering Research

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An investigation of rare metals recovery from LiNixCoyMnzO2 cathode material of the end-of-life lithium-ion batteries is presented. To determine the influence of reductant on the leach process, the cathode material (containing Li 7.6%, Co 20.4%, Mn 19.4%, and Ni 19.3%) was leached in H2SO4 solutions either with or without H2O2. The optimal process parameters with respect to acid concentration, addition dosage of H2O2, temperature, and the leaching time were found to be 2.0 M H2SO4, 4 vol.% H2O2, 70°C, and 150 min, respectively. The yield of metal values in the leach liquor was > 99%. The leach liquor was subsequently treated by precipitation techniques to recover nickel as Ni(C4H7N2O2)2 and lithium as Li2CO3 with stoichiometric ratios of 2:1 and 1.2:1 of dimethylglyoxime:Ni and Na2CO3:Li, respectively. Cobalt was recovered by solvent extraction following a 3-stage process using Na-Cyanex 272 at pHeq ~5.0 with an organic-to-aqueous phase ratio (O/A) of 2/3. The loaded organic phase was stripped with 2.0 M H2SO4 at an O/A ratio of 8/1 to yield a solution of 114 g/L CoSO4; finally recovered CoSO4.xH2O by crystallization. The process economics were analyzed and found to be viable with a margin of $476 per ton of the cathode material.

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“…Several industrial units such as leather tanning, chrome plating, electroplating, and wood preservation involve use of chromium compounds at large scale. [1][2][3][4] Most of chromium compounds are water soluble, and excess of these compounds is thrown as aqueous waste into water bodies. Hexavalent chromium (Cr +6 ) has been found 300 times more toxic as compared with trivalent chromium (Cr +3 ).…”

Section: Introductionmentioning

confidence: 99%

Silver nanoparticles supported on smart polymer microgel system for highly proficient catalytic reduction of Cr⁺⁶ to Cr⁺³ with formic acid

Hussain

Ali

Shahid

et al. 2021

Applied Organom Chemis

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Poly(styrene@N‐isopropylmethacrylamide‐methacrylic acid) [P (St‐NM)] microgels were prepared via seed facilitated emulsion polymerization process. In situ reduction of silver ions was carried out to generate Ag nanoparticles in the voids of shell region of polymer microgels. Synthesized P (St‐NM) and Ag‐P (St‐NM) particles were characterized by UV–Vis spectroscopy, transmission electron microscopy (TEM), Fourier‐transformed infrared spectroscopy (FTIR), and X‐ray diffraction (XRD). The stability of Ag nanoparticles within P (St‐NM) system over the wide range of pH and temperature is also a part of this study. Thus, prepared Ag‐P (St‐NM) was tested for its catalytic efficiency against reduction of K2Cr2O7 using formic acid (FA) as reductant. Factors affecting catalytic efficiency of Ag‐P (St‐NM) system towards transformation of Cr+6 to Cr+3 were investigated. Other toxic chemicals can also be reduced using same catalytic system.

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Hydrometallurgical valorization of chromium, iron, and zinc from an electroplating effluent

Cited by 32 publications

References 39 publications

Recycling of zinc ions in disc-donut column considering forward mixing mass transfer, and effects of pulsed and non-pulsed condition

Recycling of zinc ions in disc-donut column considering forward mixing mass transfer, and effects of pulsed and non-pulsed condition

Recycling of end-of-life LiNixCoyMnzO2 batteries for rare metals recovery

Silver nanoparticles supported on smart polymer microgel system for highly proficient catalytic reduction of Cr⁺⁶ to Cr⁺³ with formic acid

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Hydrometallurgical valorization of chromium, iron, and zinc from an electroplating effluent

Cited by 32 publications

References 39 publications

Recycling of zinc ions in disc-donut column considering forward mixing mass transfer, and effects of pulsed and non-pulsed condition

Recycling of zinc ions in disc-donut column considering forward mixing mass transfer, and effects of pulsed and non-pulsed condition

Recycling of end-of-life LiNixCoyMnzO2 batteries for rare metals recovery

Silver nanoparticles supported on smart polymer microgel system for highly proficient catalytic reduction of Cr+6 to Cr+3 with formic acid

Contact Info

Product

Resources

About

Silver nanoparticles supported on smart polymer microgel system for highly proficient catalytic reduction of Cr⁺⁶ to Cr⁺³ with formic acid