New generation Amberlite XAD resin for the removal of metal ions: A review

Ahmad, Akil; Siddique, Jamal Akhter; Laskar, Mohammad Asaduddin; Kumar, Rajeev; Mohd‐Setapar, Siti Hamidah; Khatoon, Asma; Shiekh, Rayees Ahmad

doi:10.1016/j.jes.2014.12.008

Cited by 94 publications

(37 citation statements)

References 145 publications

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“…51 Instead of preparing the silylated sulfonamide precursor for surface graing to SBA-15 and MCM-41 silica, the SILP was synthesized starting from a PS-DVB-based resin as a support with sulfonyl-chloride reactive sites. Silicabased materials suffer from a lack of stability in strongly acidic or alkaline conditions, low breakthrough for polar analytes, 40 collapse of the mesoporous structure in water due to silicate hydrolysis 47 and the need to use more expensive starting compounds such as 2-(4-chlorosulfonylphenyl)ethyltrimethoxysilane instead of a sulfonyl chloride resin.…”

Section: Silps Characterizationmentioning

confidence: 99%

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Recovery of scandium(iii) from diluted aqueous solutions by a supported ionic liquid phase (SILP)

2017

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The adsorption of scandium from diluted, acidic solutions by a supported ionic liquid phase (SILP) was investigated, as part of a process for recovery of scandium from bauxite residue (red mud). Both dry impregnation and covalent linking were studied for the SILP preparation. The SILP betainium sulfonyl(trifluoromethanesulfonylimide) poly(styrene-co-divinylbenzene) [Hbet-STFSI-PS-DVB] was prepared by covalent linking of the ionic liquid to the resin and this resulted in an adsorbent suitable for scandium recovery. For a chloride feed solution, the effects of pH, contact time, adsorption capacity, desorption, reusability of adsorbent and the influence of Fe(III), Al(III) and Ca(II) on the Sc(III) adsorption were studied. The adsorption of Sc(III) from nitrate and sulfate feed solution under optimal conditions was studied as well. The adsorption kinetics followed a pseudo-second order kinetic model. Equilibrium studies at room temperature showed that the experimental data could be well fitted by the Langmuir isotherm model. The stripping of Sc(III) from the loaded SILP was achieved with 1 M sulfuric acid. The SILP was stable and could be reused for seven adsorption/desorption cycles without significant losses in its adsorption efficiency for Sc(III). IntroductionScandium belongs to the group of rare-earth elements (REEs) and nds applications in aluminum alloys, halide lamps and fuel cells.1 However, it is an expensive metal with small global production volumes. Although scandium is relatively abundant in the Earth's crust (22 ppm), there are few scandium minerals and it rarely occurs in rich ore deposits. It is mainly recovered as by-product from the production of other metals (REEs, U, Ti, W, Al, Ni, Ta and Nb).2-4 Bauxite residue (red mud), the waste industrial product of the Bayer process for alumina production from bauxite ore, can contain up to 130 ppm of scandium and it is potentially a valuable scandium resource.5,6 Scandium can partially be recovered from bauxite residue by acid leaching. Typically, in this way many metal impurities go into the leachate as well and in concentrations much higher than that of scandium. 1,7,8 Liquid-liquid extraction is used for the recovery of Sc(III), 9 but it requires much higher initial concentrations of Sc(III) than the ones that can be found in the pregnant leach solutions.1 Nevertheless, for recovery of low concentrations of Sc(III) its enrichment with a selective adsorbent in high capacity ion exchange columns could be an efficient technique. Much of the research work on Sc(III) recovery by adsorption and extraction has been performed with resins, View Article OnlineView Journal | View Issue components can contaminate the aqueous effluents. 37 In the second class of SILPs there is no discrete IL phase in the structure of the solid support. Instead, the IL can be considered as a covalently anchored ligand. Covalent linking ensures that the IL will not be leached from the support. 32,40The objective of this work is to develop a stable SILP for the adsorption of Sc(III...

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Section: Silps Characterizationmentioning

confidence: 99%

“…1) ) and large pore volumes (200 A). 40 The support with a polystyrene-divinylbenzene (PS-DVB) matrix is unlikely to affect the metal ion adsorption processes. Therefore, only the IL will play an active role in the adsorption process.…”

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confidence: 99%

Recovery of scandium(iii) from diluted aqueous solutions by a supported ionic liquid phase (SILP)

2017

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“…Adsorption and ion exchange are known processes that have been used for metal removal for many years, especially when the contaminants are present at very low concentrations. It is recognized to be very efficient, but regeneration of the adsorbent produces a concentrated solution that requires further treatment (Merrikhpour and Jalali 2013;Ahmad et al 2015). Processes involving membranes have also been considered for the treatment of wastewater containing heavy metals (Meeks et al 2013;Gui et al 2015).…”

Section: Response Surface Analysis For the Average Energy Consumptionmentioning

confidence: 99%

Heavy metal removal from simulated wastewater using electrochemical technology: optimization of copper electrodeposition in a membraneless fluidized bed electrode

Tonini

Ruotolo

2016

Clean Techn Environ Policy

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Heavy metal removal from industrial wastewaters has been intensively studied, since it is well known that they can cause severe problems to human health and aquatic life, even at very low concentrations. In this work, it was demonstrated that electrodeposition in fluidized bed electrode (FBE) can be efficiently employed to remove metal ions from solution, avoid contamination, and recover the metal. Copper electrodeposition from diluted solutions was efficiently performed using a membraneless FBE. The average current efficiency (ACE), average energy consumption (AEC), and space-time yield (AY) was optimized taking into account the operational and process variables. It was noted that for all response variables studied, the raise of supporting electrolyte concentration (C s ) contributed to improvements in the process. The operational conditions current (I) and bed expansion (E) determined the values of CE, Y, and EC under activated control, but the initial copper concentration (C 0 ) determined how long the electrodeposition process will work under activated or mass transfer control, thus affecting the average values of CE, Y, and EC. Considering C 0 of 500 mg L -1 , copper can be optimally recovered with ACE [60 %, AY[38 kg h -1 m -3 , and AEC\4.0 kWh kg -1 by applying the lowest I and the highest levels of E and C s . It was concluded that the electrochemical technology using a membraneless FBE reactor is economically competitive and be applied for the treatment of wastewaters contaminated with copper or other metals.

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“…Heavy metals are environmental toxins which harm the environment even at low concentration. They are persistent environmental contaminants (Gouda and Al Ghannam, 2016) and can accumulate in the food chain (Ahmad et al, 2015).…”

Section: Introductionmentioning

confidence: 99%

Malatya İleri Biyolojik Atıksu Arıtma Tesisi Arıtma Çamurunda Cu ve Zn’nun Mevsimsel İzlenmesi

Topal¹,

Elitok²

2018

International Journal of Pure and Applied Sciences

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In this study, Cu and Zn concentrations were monitored for 12 months in sewage sludge from the Malatya Advanced Biological Wastewater Treatment Plant (MABWTP). The obtained data were evaluated both monthly and seasonally and compared with the standard values given in the Regulation on the Use of Domestic and Urban Sewage Sludge in Soil. The highest Cu and Zn concentrations in sewage sludge from the MABWTP were 181.74±9.0 mg kg -1 and 653.8±32.6 mg kg -1 in September and the lowest Cu and Zn concentrations were 103.69±5.18 mg kg -1 and 436.2±21.8 mg kg -1 in December and March. The highest concentrations of Cu and Zn in the sewage sludge from MABWTP were found to be 167.21±8.3 mg kg -1 and 611.80±30.5 mg kg -1 in the summer and autumn, and the lowest Cu and Zn concentrations were 109.39±5.4 mg kg -1 and 440.13±22 mg kg -1 in the winter season. When the concentrations of Cu and Zn in the MABWTP treatment sludge were examined, it was found that they were lower than the limit values given in the regulation. As a result, it was determined that sewage sludge taken from MABWTP could be used for soil in terms of Cu and Zn concentrations.

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New generation Amberlite XAD resin for the removal of metal ions: A review

Cited by 94 publications

References 145 publications

Recovery of scandium(iii) from diluted aqueous solutions by a supported ionic liquid phase (SILP)

Recovery of scandium(iii) from diluted aqueous solutions by a supported ionic liquid phase (SILP)

Heavy metal removal from simulated wastewater using electrochemical technology: optimization of copper electrodeposition in a membraneless fluidized bed electrode

Malatya İleri Biyolojik Atıksu Arıtma Tesisi Arıtma Çamurunda Cu ve Zn’nun Mevsimsel İzlenmesi

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