A comparative study of two chelating ion-exchange resins for the removal of chromium(III) from aqueous solution

Göde, Fethiye; Pehlivan, Erol

doi:10.1016/s0304-3894(03)00110-9

Cited by 251 publications

(148 citation statements)

References 24 publications

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“…Synthetic resin is another kind of medical absorbent material with macropore high molecular polymers belonging to neutral macropore resin that absorbs substances via Vandar Val gravitation. Its absorbent ability has been found to be characterized by a fast absorbent speed, high mechanical strength, relative absorbent specificity mainly absorbing the substances with a molecular weight of 500-5 000 Da and showing an outstanding absorbent ability to those toxins which can bind to proteins closely or are highly fat-soluble [23,24] . In the experiment of resin blood perfusion in vitro, we found that the resin blood perfusion device was able to effectively absorb transaminase and bilirubin but weakly affect kidney function and blood ammonia, considering that it absorbed medium molecules not small molecules.…”

Section: Discussionmentioning

confidence: 99%

Assessment of resin perfusion in hepatic failurein vitroandin vivo

Wang

Wang²,

Luo³

et al. 2004

WJG

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AIM:To observe the adsorbent effect of resin on endotoxin, cytokine, bilirubin in plasma of patients with hepatic failure and to determine the resin perfusion as an artificial liver support system in the treatment of hepatic failure. METHODS:One thousand milliliters of discarded plasma was collected from each of 6 severe hepatitis patients treated with plasma exchange. The plasma was passed through a resin perfusion equipment for 1-2 h via extracorporeal circulation, and then absorbent indicators of transaminase, bilirubin, blood ammonia, endotoxin and cytokines were examined. In the meantime, study of in vivo resin plasma perfusion was performed on 7 severe hepatitis patients to compare the changes of endotoxin and cytokines in blood before and after perfusion. RESULTS:The levels of total bilirubin, endotoxin, interleukin 1β and TNF-α in plasma were significantly decreased after in vitro resin plasma perfusion. The levels of interleukin 1β, TNF-α and endotoxin in blood were also evidently declined after in vivo resin plasma perfusion. Nevertheless, no obvious changes in IL-6, creatinine (Cr) and urea nitrogen (UN), blood ammonia and electrolytes were found both in vitro and in vivo. CONCLUSION:Bilirubin, endotoxin and cytokines in plasma of patients with hepatic failure can be effectively adsorbed by resin in vitro. Most cytokines and endotoxin in plasma can also be effectively removed by resin in vivo. It demonstrates that resin perfusion may have good treatment efficacy on hepatic failure and can be expected to slow down the progression of hepatic failure.Wang YJ, Wang ZW, Luo BW, Liu HL, Wen HW. Assessment of resin perfusion in hepatic failure in vitro and in vivo. World J Gastroenterol 2004; 10(6): 837-840

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Section: Discussionmentioning

confidence: 99%

Assessment of resin perfusion in hepatic failurein vitroandin vivo

Wang

Wang²,

Luo³

et al. 2004

WJG

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“…All working solutions of varying concentrations were obtained by successive dilution (Gode and Pehlivan 2003). The concentration of chromium solution is presented in the form of mg of Cr per Litre of solution.…”

Section: Batch Experimentsmentioning

confidence: 99%

“…Several studies have been reported in the literature to remove chromium from aqueous solutions using ion exchange resins (Cavaco et al 2007;Ibrahim and Jimoh 2008;Rafati et al 2010). Gode and Pehlivan (2003) removed Cr(III) from aqueous streams using Chelax 100 and Lewatit TP 207 cationic exchange resins. In this study, the sorption reached equilibrium in 120 min and the maximum sorption capacity obtained was in the order of 0.28 mmol g -1 .…”

Section: Introductionmentioning

confidence: 99%

Removal of hazardous hexavalent chromium from aqueous solution using divinylbenzene copolymer resin

Bajpai

Dey

Jha

et al. 2012

Int. J. Environ. Sci. Technol.

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This paper presents the removal of hazardous hexavalent chromium from liquid waste streams using divinylbenzene copolymer resin Amberlite IRA 96. Important sorption parameters such as contact time, pH, resin dosage and initial metal concentration were studied at 30°C. The kinetic study was conducted using pseudo-first and pseudo-second-order kinetics at 30°C. The sorption process was found to be pH dependent. Maximum removal was obtained at pH 2 under optimized conditions. The sorption process was rapid and 99 % of the removal was achieved in first 30 min. The equilibrium data were fitted to both Langmuir and Freundlich models. The better regression coefficient (R 2 ) in Freundlich model suggests the multilayer sorption process. The value of Gibbs free energy for sorption process was found to be -12.394 kJmol -1 . The negative value indicated the spontaneity of the sorption process. Scanning electron microscope and energy dispersive X-ray spectroscopy studies were conducted to find the role of surface morphology during sorption process. The Fourier transform infrared study was conducted to identify the functional groups responsible for interaction between the resin and chromium. Desorption and regeneration studies were also carried out.

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“…Cr(III) ise düşük sevilerde insan ve hayvan metabolizması için hayati rol oynarken yüksek miktarları tehlikeli olabilmekte ve güçlü oksidantların varlığında da toksik bir bileşik olan Cr(VI)'ya dönüşebilmektedir. Bu nedenle Cr(III)'ün atıksulardan giderilmesi gerekir (Gode and Pehlivan, 2003;Gode and Pehlivan, 2007;Mustafa et al, 2008). Atıksulardan kromu uzaklaştırmak için kimyasal çöktürme, elektrokimyasal çöktürme, iyon değişimi, adsorpsiyon, diyaliz/elektrodiyaliz, membran ayırma, ultrafiltrasyon, ters osmoz, flotasyon, elektrokoagulasyon ve sedimentasyon gibi birçok arıtım teknolojisi geliştirilmiştir (Mohan and Pittman, 2006;Alyüz and Veli, 2009).…”

Section: Introductionunclassified

Removal of Cr(III) from Synthetic Wastewater by using a Strong Cation Exchange Resin

Aşçı¹

2017

jist

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ÖZET: Cr(III), çeşitli endüstriyel atıksularda var olan toksik ağır metallerden biridir. Bu çalışmada sulu çözeltilerden krom giderimi iyon değişimi yöntemiyle araştırılmıştır. Bu amaçla sorbent olarak güçlü bir katyon değiştirici reçine olan Dowex 88 kullanılmıştır. Deneysel çalışmalarda pH, sıcaklık, reçine miktarı ve sorpsiyon süresi gibi parametrelerin krom giderimine etkisi incelenmiştir. Ayrıca, termodinamik, izoterm ve kinetik çalışmalar yapılmıştır. İzoterm çalışmalarında Langmuir ve Freundlich izoterm modelleri denenmiş ve deneysel verilerin her iki izoterm modeline de uyduğu görülmüştür. Termodinamik sonuçlar, Dowex 88 reçinesine krom sorpsiyonunun ekzotermik ve kendiliğinden gerçekleştiğini göstermiştir. Kinetik çalışmalar sonucunda ise sorpsiyon verilerinin tersinir birinci mertebe kinetik modele uyduğu gözlenmiştir.Anahtar Kelimeler: Cr(III), Dowex 88, iyon değişimi, izoterm, termodinamik ABSTRACT: Cr(III), is toxic heavy metal present in wastewaters from a variety of industries. In this study, chromium removal was investigated using ion exchange method from aqueous solutions. For this purpose, strong cation exchanger resin Dowex 88 was used as sorbent. During the experimental studies, the effect of parameters such as pH, temperature, resin dosage and sorption time on chromium removal was observed. Thermodynamic, isotherm and kinetic studies were also performed. In the isotherm studies, Langmuir and Freundlich isotherm models were applied and it was occured that the experimental data fit to both isotherm models. Thermodynamic results showed that the chromium sorption onto Dowex 88 resin had exothermic and spontaneous. As a result of the kinetic studies observed that the sorption data follows first-order reversible kinetics.

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A comparative study of two chelating ion-exchange resins for the removal of chromium(III) from aqueous solution

Cited by 251 publications

References 24 publications

Assessment of resin perfusion in hepatic failurein vitroandin vivo

Assessment of resin perfusion in hepatic failurein vitroandin vivo

Removal of hazardous hexavalent chromium from aqueous solution using divinylbenzene copolymer resin

Removal of Cr(III) from Synthetic Wastewater by using a Strong Cation Exchange Resin

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