A review on methods of regeneration of spent pickling solutions from steel processing

Regel‐Rosocka, Magdalena

doi:10.1016/j.jhazmat.2009.12.043

Cited by 244 publications

(114 citation statements)

References 49 publications

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“…In developed countries, removal of heavy metals in wastewater is normally achieved by advanced technologies such as ion exchange resins, vacuum evaporation, crystallization, solvent extraction and membrane technologies (Regel-Rosocka, 2010, Agrawal & Sahu, 2009, Nagarale, 2006, Ulbricht,2006. However, in developing countries, these treatments cannot be applied because of technical levels and insufficient funds.…”

Section: Electroplating Wastewatermentioning

confidence: 99%

Biomass Adsorbent for Removal of Toxic Metal Ions From Electroplating Industry Wastewater

Nascimento¹,

Sousa²,

Neto³

et al. 2012

Electroplating

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Section: Electroplating Wastewatermentioning

confidence: 99%

Biomass Adsorbent for Removal of Toxic Metal Ions From Electroplating Industry Wastewater

Nascimento¹,

Sousa²,

Neto³

et al. 2012

Electroplating

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“…Owning to the inefficiency of the traditional methods for the treatment of spent pickling baths, as the precipitation-filtration process [4], many different techniques such as liquid-liquid extraction [5] or anionic resins [6] have been suggested [7]. In this way, the electrolysis in a membrane reactor is presented in this paper as an alternative for the treatment of the spent pickling baths in one single step.…”

Section: Introducctionmentioning

confidence: 99%

Study of the zinc recovery from spent pickling baths by means of an electrochemical membrane reactor using a cation-exchange membrane under galvanostatic control

Carrillo-Abad

García-Gabaldón

Pérez-Herranz

2014

Separation and Purification Technology

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to reach the equilibrium between the zinc transferred through the membrane and that deposited on the cathode. Therefore, the synthetic cathodic zinc is not consumed at any time. Moreover, under this circumstances iron codeposition is also avoided. INTRODUCCTIONOne of the most well known uses of metallic zinc is to protect iron or steel pieces from corrosion processes by coating them with it [1]. In order to coat the pieces, the oldest technique used is the hot dip galvanizing, which is based on dipping the pieces into molten zinc. Previously to the dipping process, these pieces must be cleaned by means of different pretreatments. The present paper focuses on the effluents coming from the pickling process, which consists of attacking the pieces surface with HCl for cleaning them from rust and impurities. The effluents coming from the pickling process contain high concentrations of Zn, Fe and HCl together with low concentrations of organic compounds, such as hydrogen evolution reaction inhibitors, and other heavy metals [2].Therefore, spent pickling baths have to be treated before their disposal to accomplish with the environmental restrictions. However, the development of an adequate treatment for this effluent is very difficult because of the high complexity usually encountered in the hydrochloric acid effluents, where the target species are present in a heterogeneous mixture with different amounts of non-desirable compounds [3].Owning to the inefficiency of the traditional methods for the treatment of spent pickling baths, as the precipitation-filtration process [4], many different techniques such as liquid-liquid extraction [5] or anionic resins [6] have been suggested [7]. In this way, the electrolysis in a membrane reactor is presented in this paper as an alternative for the treatment of the spent pickling baths in one single step. In a previous work [8], the authors performed an electrochemical study of the solution to obtain the kinetics of the electrochemical processes and, then, an undivided electrochemical batch reactor was used in potentiostatic and galvanostatic mode [9,10] to determine the viability of zinc recovery from spent pickling baths. During these experiments zinc redissolution was observed at high time values for all the experimental conditions. This process is related to the synergic effect of iron ions and dissolved chlorine gas that attacks zinc deposits causing their oxidation [11,12]. 3In order to prevent the zinc redissolution phenomena, an anion-exchange membrane (AEM) was initially used [13] to avoid chlorine presence in the cathodic compartment.This membrane permitted zinc conversion values closer to 100% and higher current efficiencies. However, iron began to codeposit with zinc as the latter was being removed from the solution since the iron-zinc system deposits following the anomalous codeposition phenomenon [14][15][16], in which the less noble metal (zinc) deposits preferentially, and iron deposition depends on the zinc-iron ratio, the applied current and the pH value.Therefore...

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“…The enhancement in TcO 4 -extraction with crown ether, compared with conventional solvents, is attributed to improvement in the solvation properties of IL. The authors of the chapter have studied Cyphos ILs as extractants for regeneration of spent pickling solutions from hot-dip galvanizing plants (Marszalkowska et al, 2010;Regel-Rosocka et al 2006Regel-Rosocka, 2009, 2010. Among the studied extractants trihexyl(tetradecyl)phosphonium chloride (Cyphos IL 101), trihexyl(tetradecyl)phosphonium bis(2,4,4-trimethylpentyl)phosphinate (Cyphos IL 104), trihexyl(tetradecyl)phosphonium bis(trifluoromethylsulphonyl)imide (Cyphos IL 109), and trihexyl(tetradecyl)phosphonium tetrafluoroborate (Cyphos IL 111) in mixture with toluene have been investigated as reagents to extract Zn 2+ , Fe 3+ or Fe 2+ from chloride media.…”

Section: Phosphonium Ilsmentioning

confidence: 99%

Ionic Liquids in Separation of Metal Ions from Aqueous Solutions

Regel‐Rosocka¹,

Wiśniewski²

2011

Applications of Ionic Liquids in Science and Technology

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A review on methods of regeneration of spent pickling solutions from steel processing

Cited by 244 publications

References 49 publications

Biomass Adsorbent for Removal of Toxic Metal Ions From Electroplating Industry Wastewater

Biomass Adsorbent for Removal of Toxic Metal Ions From Electroplating Industry Wastewater

Study of the zinc recovery from spent pickling baths by means of an electrochemical membrane reactor using a cation-exchange membrane under galvanostatic control

Ionic Liquids in Separation of Metal Ions from Aqueous Solutions

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