Separation of hexavalent chromium from industrial effluent through liquid membrane using environmentally benign solvent: A study of experimental optimization through response surface methodology

Mondal, Supriyo Kumar; Saha, Prabirkumar

doi:10.1016/j.cherd.2018.02.001

Cited by 29 publications

(21 citation statements)

References 34 publications

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“…Among the chemicals exhausted from these factories, methylene blue (MB) is responsible for fast heart rate, vomiting (spitting), shock, Heinz body formation, cyanosis, jaundice (icterus), quadriplegia and tissue necrosis in humans, [2][3][4][5] whereas chromium compounds cause nausea, diarrhoea, liver failure, dermatitis (eczema), internal haemorrhage (bleeding) and respiratory troubles. [6][7][8][9] Various chemical and physical methods have been employed to remove the MB and chromium compounds from aqueous solution, such as solvent extraction, 8 adsorption, [10][11][12][13] coagulation, [14][15][16] membrane separation, 17,18 ion exchange, 19,20 electrodeposition, 21 and reverse osmosis. 22 It is wellknown that, adsorption is a promising method to remove these compounds from waste water since this method has high enrichment efficiency and can be easily used to separate the phases.…”

Section: Introductionmentioning

confidence: 99%

Insight into the adsorption mechanisms of methylene blue and chromium(iii) from aqueous solution onto pomelo fruit peel

et al. 2019

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Section: Introductionmentioning

confidence: 99%

Insight into the adsorption mechanisms of methylene blue and chromium(iii) from aqueous solution onto pomelo fruit peel

et al. 2019

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“…Various methods have been investigated to remove Cr(VI) from industrial wastewater, such as electro-coagulation 7 , photo-catalytic reduction 8,9 , membrane separation 10,11 , adsorption 12–14 , ion-exchange 15,16 and microbial remediation 17,18 . Among these methods, adsorption has won a great deal of concern due to it’s a series of advantages, such as cost-effective, high sorption capacity, simple operation and no secondary pollution.…”

Section: Introductionmentioning

confidence: 99%

Adsorption mechanism of Cr(VI) onto GO/PAMAMs composites

Liu¹,

Fan²,

Peng³

2019

Sci Rep

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Graphene oxide/polyamidoamine dendrimers (GO/PAMAMs) composites were used to remove Cr(VI) from simulated effluents, the adsorption kinetics and thermodynamics of Cr(VI) onto GO/PAMAMs were systematically investigated. The results showed that the optimum pH value was 2.5, the removal percentage reached 90.7% for 30 mg/L of Cr(VI) within 120 min. The adsorption process was well described by pseudo-second-order kinetic model. The maximum adsorption capacities of Cr(VI) onto GO/PAMAMs were found to be 131.58, 183.82 and 211.42 mg/g at 293.15, 303.15 and 313.15 K, respectively, which were calculated from the Langmuir model equation. The adsorption thermodynamic parameters indicate that the adsorption of Cr(VI) onto GO/PAMAMs is a spontaneous endothermic process. The XPS analysis reveals the adsorption and removal mechanism of Cr(VI) on GO/PAMAMs that first the Cr(VI) binds to the protonated amine of GO/PAMAMs, then Cr(VI) be reduced to Cr(III) with the assistance of π-electrons on the carbocyclic six-membered ring of GO in GO/PAMAMs, and then Cr(III) was released into solution under the electrostatic repulsion between the Cr(III) and the protonated amine groups.

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“…In the same system (ELM), Hashim et al [47] demonstrated that the most influential parameters for Cr(VI) extraction by Cyanex 923 were concentration of the surfactant Span span and ratios of organic/internal or external phases. As reported by Saha et al [48], more than 95% of Cr(VI) was extracted by Aliquat-336 in sunflower oil as solvent in bulk liquid membranes system. The transport of Cr(VI) through the bulk liquid membrane was influenced by strip phase concentration, strip phase pH, and carrier concentration.…”

Section: Optimizationmentioning

confidence: 79%

Chromium(VI) Removal by Polyvinyl Chloride (PVC)/Aliquat-336 Polymeric Inclusion Membranes in a Multiframe Flat Sheet Membrane Module

et al. 2019

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A new multiframe flat sheet membrane contactor module containing several flat membranes was designed and implemented. Each frame contains a chamber (central hole) in which the feed and the receiving phases are put in contact with polyvinyl chloride (PVC)/Aliquat-336 polymeric flat sheet membranes for Cr(VI) removal from aqueous solutions (feed phase). To evaluate the efficiency of the system, the experimental design methodology was used to analyze the effect of temperature (T, °C), PVC/Aliquat-336 ratio, and Cr (VI) concentration in the feed phase and the concentration of sodium chloride (NaOH-NaCl) in the receiving phase. Two representative mathematical models of the two responses (extraction and back-extraction) were respectively obtained. A good correlation between the experimental results and those predicted (RS2 = 97.77 and RR2 = 97.87) was achieved, allowing the optimization of the different factors selected for each response, separately. The proposed system showed a good separation performance, leading to Cr(VI) extractions up to 93% when working at the optimized operating conditions.

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Separation of hexavalent chromium from industrial effluent through liquid membrane using environmentally benign solvent: A study of experimental optimization through response surface methodology

Cited by 29 publications

References 34 publications

Insight into the adsorption mechanisms of methylene blue and chromium(iii) from aqueous solution onto pomelo fruit peel

Insight into the adsorption mechanisms of methylene blue and chromium(iii) from aqueous solution onto pomelo fruit peel

Adsorption mechanism of Cr(VI) onto GO/PAMAMs composites

Chromium(VI) Removal by Polyvinyl Chloride (PVC)/Aliquat-336 Polymeric Inclusion Membranes in a Multiframe Flat Sheet Membrane Module

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