Preliminary Study of Iron Removal from Hydrochloric Pickling Liquor by Ion Exchange

Marañón, E.; Suárez, Francisco J.; Alonso, F. J.; Fernández, Yolanda; Sastre, Herminio

doi:10.1021/ie9806895

Cited by 36 publications

(19 citation statements)

References 2 publications

(1 reference statement)

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“…When mixing iron(III) ions and hydrochloric acid together, care had to be taken that anionic complexes were not formed such as FeCl 4 À . As outlined by Maranon et al [67] this latter reaction was not expected unless the concentration of HCl was 1 M or higher, which was not the case in the current study. The co-presence of protons with iron(III) species in the bottle-point tests meant that competition for exchange sites occurred.…”

Section: Discussionsupporting

confidence: 64%

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Equilibrium and column studies of iron exchange with strong acid cation resin

Millar

Schot

Couperthwaite

et al. 2015

Journal of Environmental Chemical Engineering

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A B S T R A C TThe exchange of iron species from iron(III) chloride solutions with a strong acid cation resin has been investigated in relation to a variety of water and wastewater applications. A detailed equilibrium isotherm analysis was conducted wherein models such as Langmuir-Vageler, Competitive Langmuir, Freundlich, Temkin, Dubinin-Astakhov, Sips and Brouers-Sotolongo were applied to the experimental data. An important conclusion was that both the bottle-point method chosen and solution normality used to generate the ion exchange equilibrium isotherm influenced which sorption model fitted the isotherm profiles optimally. Invariably, the calculated value for the maximum loading of iron on strong acid cation resin was substantially higher than the value of 47.1 g/kg of resin which would occur if one Fe 3 + ion exchanged for three "H + " sites on the resin surface. Consequently, it was suggested that above pH 1, various iron complexes sorbed to the resin in a manner which required less than 3 sites per iron moiety. Column trials suggested that the iron loading was 86.6 g/kg of resin when 1342 mg/L Fe(III) ions in water were flowed at 31.7 BV/h. Regeneration with 5-10% HCl solutions reclaimed approximately 90% of exchange sites.2014 Elsevier Ltd. All rights reserved. IntroductionMetal pollution of our water resources remains a major concern [1-3]. Several methods have been employed to remediate contaminated solutions including precipitation [4], coagulationflocculation [5], adsorption [6-8], ion exchange [9,10], membrane filtration [11], flotation [12,13] and electrochemical means [14]. Physico-chemical techniques are attractive due to a variety of reasons such as process economics, reliability and ease of use [15]. Ion exchange is of particular interest as not only can the metals potentially be recovered but also the technology is well developed, simple and effective [16]. Iron is a common contaminant in natural waters [17], mining effluents [18], hydrometallurgical solutions [19] and a range of other industrial wastes [20]. Demineralization of water and wastewater solutions is widely practiced in industry, usually with a combination of cation and anion resins to remove the dissolved ions [21]. Kaya et al. [22] have shown that the presence of iron even at low concentration can significantly reduce the operating capacity of synthetic strong acid cation resins. Victor-Ortega Abbreviations: A, Temkin isotherm parameter (L/mmol or L/mg); a s , Sips equilibrium isotherm coefficient; a, exponent which represents the inherent energy heterogeneity of the sorbent surface; AIC, Akaike information criterion; ARE, average relative error; b T , Temkin constant related to the heat of adsorption (J/mol); BV, bed volumes; C e , equilibrium concentration of iron ions in solution (mg/L); C o , initial concentration of iron ions in solution (mg/L); e, adsorption potential (J/mol); E, energy of adsorption (J/mol); eq, equivalents; EABS, sum of the absolute errors; HYBRID, hybrid fractional error function; K CL , Competitive Lan...

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Section: Discussionsupporting

confidence: 64%

“…The co-presence of protons with iron(III) species in the bottle-point tests meant that competition for exchange sites occurred. For instance, Maranon et al [67] demonstrated in column studies that when the concentration of HCl present in solution was increased the breakthrough of dissolved iron species was accelerated.…”

Section: Discussionmentioning

confidence: 99%

Equilibrium and column studies of iron exchange with strong acid cation resin

Millar

Schot

Couperthwaite

et al. 2015

Journal of Environmental Chemical Engineering

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“…E. Maranon, etc. [5]has studied the effects of cation exchange resin, chelatingresin and anion exchange resin in hydrochloric acid spent pickling liquors iron removal. Studies have shown that acid cation exchange resin and the chelating resin can remove the Fe (II),while anion exchange resin had good removal efficiency on FeCl 4 -which is a negatively charged compounds formed by Fe (III) and chloride ion.…”

Section: Ion Exchangementioning

confidence: 99%

A Review on Spent Pickling Liquors Treatment

Liu¹,

Qi²,

Liu³

2017

dteees

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Abstract. Spent pickling liquors is a hazardous waste because it is acidic and contains a large quantity of metal ions. It will cause severe environmental pollution and waste of resource if not properly treated. The traditional neutralization method will cause secondary pollutant. In this review, the latest development and research of spent pickling liquors treatment have been summarized, mainly including high temperature roasting, evaporation, ferric salt crystallization, ion exchange, membrane, chemical transformation, and electrolytic method. In the end of this review, there is outlook of spent pickling liquors treatment. It pointed out that the optimized way is to take the waste picking liquors as resource and combine the comprehensive utilization with the environment protection.

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“…Many ion-exchange resins are available nowadays for metal sorption. While many chelating resins have been successfully used for removing heavy metals from wastewaters and spent baths, e.g., Lewatit TP-207 [3,4], Dowex M4195, Amberlite IRC748 [5], and Purolite S-950 [6], only few resins, such as Purolite S957 (sulfonated mono-phosphonic resin), have been reported for selective removal of iron ions from Cr(III) passivation bath [7,8].…”

Section: Introductionmentioning

confidence: 99%