Extraction of chromium (VI) from multicomponent acidic solutions by emulsion liquid membranes using TOPO as extractant

Kumbasar, Recep Ali

doi:10.1016/j.jhazmat.2009.01.113

Cited by 59 publications

(25 citation statements)

References 15 publications

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“…This problem has received considerable attention from environmentalists and scientists in recent years. [9,[23][24][25][26] Presently, three main processes have come forward to perform selective extraction of the metals. These are solvent extraction (SX), [27] membrane-based processes (MBPs), [28] adsorptions (APs), and ion-exchange processes (IEPs).…”

Section: Introductionmentioning

confidence: 99%

Performance Evaluation of Nickel Separation and Extraction Process from Simulated Spent Cr/Ni Electroplating Bath Solutions by ELM Process Using LIX63 and PC88A

Eyüpoğlu

Kumbasar

Işık

2014

Journal of Dispersion Science and Technology

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The study was conducted to investigate synergistic extraction of nickel from simulated spent Cr-Ni electroplating bath solutions by emulsion liquid membrane (ELM) process using 5,8-diethyl-7-hydroxydodecan-6-one oxime (LIX 63) and 2-ethylhexylphosphonic acid mono-2-ethylhexyl ester (PC88A) as carriers. The importance of ELM composition and the properties of simulated spent electroplating bath solution have been optimized to synergistically extract nickel. The important parameters affecting the nickel extraction efficiency and ELM stability, such as acid concentration, stripping solution type and concentration, extractant concentration, surfactant concentration, and phase ratio, were experimentally studied. Along with obtained 1309 Downloaded by [New York University] at 18:44 15 May 2015 results, higher than 99% of nickel was selectively extracted within 30 minutes from simulated electroplating bath solutions that their metal concentrations was in the range of 100-500 mg/L. in the optimum conditions. The higher separation factor value of nickel over chromium (b Ni/Cr ) was obtained as 898. As a result, the nickel extraction kinetic was found to depend on PC88A, since extraction mechanism of PC88A is slower than that of LIX63. So, the combined use of LIX63 and PC88A improved the selective extraction of nickel in that process.

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Section: Introductionmentioning

confidence: 99%

Performance Evaluation of Nickel Separation and Extraction Process from Simulated Spent Cr/Ni Electroplating Bath Solutions by ELM Process Using LIX63 and PC88A

Eyüpoğlu

Kumbasar

Işık

2014

Journal of Dispersion Science and Technology

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“…For this reason, the applicability of emulsion liquid membranes for chromium (VI) removal from aqueous solutions is evaluated. In recent years, a remarkable increase of the applications of emulsion liquid membranes in separation processes is observed [19][20][21][22][23]. The main advantages of the ELM system are: (a) high interfacial area for mass transfer, especially at the inner membrane-water interface, due to the small size of the aqueous phase droplets; (b) high diffusion rate of the metal ion through the membrane; (c) simultaneous performance of extraction (at the outer interface) and stripping (at the inner interface) in the same system, and (d) capability of treating a variety of elements and compounds in industrial setting at a greater speed and with a high degree of effectiveness, with varying contaminant concentrations and volume requirements.…”

Section: Introductionmentioning

confidence: 99%

Selective extraction of chromium (VI) from multicomponent acidic solutions by emulsion liquid membranes using tributhylphosphate as carrier

Kumbasar¹

2010

Journal of Hazardous Materials

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“…On the whole, the separation percentages are almost above 90 %. Kumbasar also discovered the same rule [24]. Further experimental results indicated that the separation percentage in the external phase with 20 g L -1 salinity is 97.8 % at 5 min.…”

Section: Effect Of H 2 S Concentrationsmentioning

confidence: 52%

Separation of Hydrogen Sulfide from Wastewater by Emulsion Liquid Membranes

Zhang

2011

Chem Eng & Technol

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Hydrogen sulfide was separated from highly saline wastewater by emulsion liquid membranes (ELMs). Such membranes consist of polyalkenyl succinimide as emulsifying agent, diethanolamine as carrier, kerosene as membrane, and sodium hydroxide as stripping solution. The effect of four surfactants on the stability of ELMs was investigated and every operational parameter was tested. The highest achievable separation efficiency was 99.73 % for a 100 mg L -1 solution. Obviously, the salinity of the external phase has a negligible effect on the separation of H 2 S using ELMs. IntroductionHydrogen sulfide (H 2 S) is a detrimental material in some industry processes. Because of its volatility, it harms the operator's health when inhaled and also causes environmental pollution even at very low concentrations [1,2]. It can be deadly depending on concentration and duration of exposure. Eye irritation starts to occur at 10-20 ppm, and a concentration over 1000 ppm might lead to death [3]. The corrosion of H 2 S in wastewater also causes serious failures of casting tubes and other metal equipment. Therefore, the control of H 2 S became a major concern in industrial wastewaters [4]. Several methods have been used to treat H 2 S, such as biofilters and biotrickling filters [5,6], adsorbents [7,8], and catalytic oxidations [9,10]. These methods all provide satisfactory removal efficiency, however, the process flows are complicated and the treatment cost is higher. For wastewaters with high salinity in the oil field, the above-mentioned methods have some shortcomings.The emulsion liquid membrane (ELM) technique was invented first by Li in 1968 [11, 12]. Typically, a stable emulsion with two immiscible phases is formed which subsequently is dispersed into wastewater as the external phase [13]. Normally, the internal phase is a stripped agent aqueous solution, the external phase contains the target substance, and the membrane phase is the oil phase containing a surfactant to remove the external and internal phases. The internal and external phases are usually miscible. The target substance is removed from the feed phase through the membrane phase and recovered from the internal aqueous phase by finally breaking the emulsion.The ELM technique has four advantages: (i) large mass transfer area, (ii) high diffusion rate, (iii) separation and stripping in one system, and (iv) wide adaptability and high separation efficiency [14][15][16]. Therefore, ELM processes have been frequently used in purification or separations, such as for hydrocarbons [17], organic acids and amines [18,19], wastewater treatment [20,21], metal ions [22][23][24][25], and so on. The experimental results demonstrated that the ELM was a successful technique and the extraction efficiency was above 90 %. However, there was no available information in the literature on the separation of H 2 S in wastewater using ELMs. Therefore, a new attempt was carried out.Here, separation of H 2 S from wastewater with high salinity using the ELM technique was performed. The wastewater...

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Extraction of chromium (VI) from multicomponent acidic solutions by emulsion liquid membranes using TOPO as extractant

Cited by 59 publications

References 15 publications

Performance Evaluation of Nickel Separation and Extraction Process from Simulated Spent Cr/Ni Electroplating Bath Solutions by ELM Process Using LIX63 and PC88A

Performance Evaluation of Nickel Separation and Extraction Process from Simulated Spent Cr/Ni Electroplating Bath Solutions by ELM Process Using LIX63 and PC88A

Selective extraction of chromium (VI) from multicomponent acidic solutions by emulsion liquid membranes using tributhylphosphate as carrier

Separation of Hydrogen Sulfide from Wastewater by Emulsion Liquid Membranes

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