Adsorption properties and mechanism for Fe(III) with solvent impregnated resins containing HEHEHP

Liu, Junshen; Gao, Xuezhen; Liu, Chuan; Guo, Lei; Zhang, Shengxiao; Liu, Xunyong; Li, Haimei; Liu, Chunping; Jin, Rencheng

doi:10.1016/j.hydromet.2013.06.002

Cited by 19 publications

(5 citation statements)

References 16 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Hence, the idea of the formation of multi-nuclear iron complexes in solution and on the resin exchange sites was supported by a range of experimental evidence. Liu et al [71] also noted the importance of the tendency of iron(III) ions to hydrolyse above pH 1.5. In this case, resin impregnated with HEHEHP (2-ethylhexyl phosphonic acid mono (2-ethylhexyl) ester) possessed active exchange sites which could not accommodate the more complex iron species and thus capacity diminished.…”

Section: Discussionmentioning

confidence: 98%

“…When removing transition metal ions from solution, the pH has been shown in many studies to play a significant role in determining the efficiency of the ion exchange process. Liu et al [71] found that iron(III) uptake on solvent impregnated resins was highly dependent on solution pH, with a maximum loading observed at 1.5. Argun [72] noted that the exchange of nickel ions with clinoptilolite was accelerated by raising the solution pH to 6.…”

Section: Discussionmentioning

confidence: 99%

See 1 more Smart Citation

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

Millar

Schot

Couperthwaite

et al. 2015

Journal of Environmental Chemical Engineering

View full text Add to dashboard Cite

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...

show abstract

Section: Discussionmentioning

confidence: 98%

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

View full text Add to dashboard Cite

show abstract

“…The Ca 2+ ions can interact with acid groups of activated carbon to generate excess positive charge on the activated carbon surface, thereby enhancing the adsorption of negatively charged copper cyanide complexes, regardless of the net surface charge (Souza et al, 2018). Liu et al (2013) investigated the mechanism and adsorption properties of Fe(III) onto 2ethylhexyl phosphonic acid mono(2-ethylhexyl) ester (HEHEHP) resins. The selective removal of Fe(III) from leach liquor solutions is important as these ions lead to common problems in metal recovery.…”

Section: Adsorptionmentioning

confidence: 99%

Hydrometallurgical processes for heavy metals recovery from industrial sludges

Gunarathne

Rajapaksha

Vithanage

et al. 2020

Critical Reviews in Environmental Science and Technology

View full text Add to dashboard Cite

Hydrometallurgical processes for heavy metal recovery from industrial sludgesHydrometallurgical approaches have been successfully employed for metal separation and recovery from various types of waste materials. Therefore, hydrometallurgy is a promising technology for metal recovery and the removal of potentially toxic heavy metals found in industrial sludge.However, a comprehensive review that focuses on the heavy metal recovery from industrial sludge using hydrometallurgical approaches has not been conducted in the recent past. The present review discusses the capacity of hydrometallurgical techniques in recovering heavy metals sourced from different types of industrial sludges, highlighting recent scientific findings. Hydrometallurgical approaches primarily consist of three process stages: metal dissolution, concentration and purification, and metal recovery. The chemical characteristics of industrial sludge, including the type, concentration and speciation of heavy metals, directly impact selection of the best recovery method. Solvent extraction, ion-exchange, and adsorption are the major techniques employed in concentration and purification, whereas electrodeposition and precipitation are the main methods used in metals recovery. Future research should focus on the development of more efficient and environmentally-friendly methods for metal dissolution from industrial sludges contaminated with multiple metals, while increasing selectivity and energy use efficiency in the concentration and purification, and recovery steps.

show abstract

“…As can be seen, equilibrium results fitted the Langmuir isotherm (r 2 = 0.99) but not the Freundlich model (r 2 = 0.087). Therefore, it may be assumed that the adsorption of RhB on SIR was the monolayer on the surface of SIR, where the active sites and energies were homogenously distributed [32,33]. The fitted maximum monolayer adsorption capacity (q max ) of RhB on SIR was found to be 43.47 mg/g, and K L was 0.0126 L/mg.…”

Section: Adsorption Isothermmentioning

confidence: 99%

Removal of Rhodamine B from Water Using a Solvent Impregnated Polymeric Dowex 5WX8 Resin: Statistical Optimization and Batch Adsorption Studies

et al. 2020

View full text Add to dashboard Cite

Herein, commercially available Dowex 5WX8, a cation exchange polymeric resin, was modified through solvent impregnation with t-butyl phosphate (TBP) to produce a solvent impregnated resin (SIR), which was tested for the removal of rhodamine B (RhB) from water in batch adsorption experiments. The effect of SIR dosage, contact time, and pH on RhB adsorption was studied and optimized by response surface methodology (RSM), interaction, Pareto, and surface plots. Scanning electron microscopy (SEM) and Fourier transform infrared spectroscopy (FTIR) were respectively used for characterizing SIR surface morphology and identifying active binding sites before and after RhB adsorption. SEM showed that the pristine SIR surface was covered with irregular size and shape spots with some pores, while RhB saturated SIR surface was non-porous. FTIR revealed the involvement of electrostatic and π–π interactions during RhB adsorption on SIR. Dosage of SIR, contact time, and their interaction significantly affected RhB adsorption on SIR, while pH and its interaction with dosage and contact time did not. The optimum identified experimental conditions were 0.16 g of SIR dose and 27.66 min of contact time, which allowed for 98.45% color removal. Moreover, RhB adsorption equilibrium results fitted the Langmuir isotherm with a maximum monolayer capacity (qmax) of 43.47 mg/g.

show abstract

Adsorption properties and mechanism for Fe(III) with solvent impregnated resins containing HEHEHP

Cited by 19 publications

References 16 publications

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

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

Hydrometallurgical processes for heavy metals recovery from industrial sludges

Removal of Rhodamine B from Water Using a Solvent Impregnated Polymeric Dowex 5WX8 Resin: Statistical Optimization and Batch Adsorption Studies

Contact Info

Product

Resources

About