Spectrophotometric Determination of Copper in Waste Water Using Liquid?Liquid Extraction in a Flow-Injection System

Alonso, Ángel Cabo; Almendral, M.J.; Curto, Y.; Porras, M.J.

doi:10.1007/s00604-003-0068-3

Cited by 20 publications

(12 citation statements)

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“…To solve this problem, a separation/preconcentration step prior to analysis is required. Several enrichment procedures have been reported for copper determination involving different analytical techniques such as solidphase extraction (SPE) [9,10], liquid-liquid extraction (LLE) [11], ion-exchange [12], flotation [13], etc. Despite the good analytical performance which can be obtained with these separation/preconcentration techniques, their use is limited by their disadvantages, such as lengthy separation, high reagent consumption, multiple stages, and unsatisfactory enrichment factors [14].…”

Section: Introductionmentioning

confidence: 99%

Ultrasound-assisted emulsification solidified floating organic drop microextraction for the determination of trace amounts of copper in water samples

Chang

Zhang

et al. 2010

Front. Environ. Sci. Eng. China

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A simple and efficient liquid-phase microextraction (LPME) technique was developed using ultrasound-assisted emulsification solidified floating organic drop microextraction (USAE-SFODME) combined with flame atomic absorption spectrometry, for the extraction and determination of trace copper in water samples. 1-(2-Pyridylazo)-2-naphthol (PAN) was used as chelating agent. Microextraction efficiency factors (including extraction solvent type, extraction volume, time, temperature, and pH), the amount of the chelating agent, and salt effect were investigated and optimized. Under the optimum extraction conditions, figures of merit of the proposed method were evaluated. The calibration graph was linear in the range of 20-600 mg%L -1 with a detection limit of 0.76 mg%L -1 . The relative standard deviation (R.S.D) for ten replicate measurements of 20 and 400 mg%L -1 of copper was 3.83% and 2.65%, respectively. Finally, the proposed method was applied to tap water, river water, and sea water, and accuracy was assessed through the analysis of certified reference water or recovery experiments.

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Section: Introductionmentioning

confidence: 99%

Ultrasound-assisted emulsification solidified floating organic drop microextraction for the determination of trace amounts of copper in water samples

Chang

Zhang

et al. 2010

Front. Environ. Sci. Eng. China

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“…However, due to the presence of Cu in food and environmental samples at low levels, a preconcentration step prior to its spectrophotometric determination is usually necessary in order to reach an appropriate level of sensitivity. Many preconcentration procedures for copper determination in various media have been developed, such as coprecipitation (Wu and Boyle, 1997), liquid-liquid extraction (Kara and Alkan, 2002;Alonso et al, 2003), solid-phase extraction (Yamini et al, 2003;Moraes et al, 2005;Liang et al, 2005), etc.…”

Section: Introductionmentioning

confidence: 99%

Cloud point extraction preconcentration and spectrophotometric determination of copper in food and water samples using amino acid as the complexing agent

Liang

Yang

2010

Journal of Food Composition and Analysis

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“…In terms of the removal of heavy metal ions, numerous methods have been developed, such as chemical precipitation, ion exchange, liquid–liquid extraction, membrane filtration, electrochemical reduction, biosorption, electrodialysis and electro‐coagulation . However, these methods suffer from one or more drawbacks, involving high capital and maintenance costs, expensive equipment, significant energy consumption, incomplete metal removal, sludge generation, etc.…”

Section: Introductionmentioning

confidence: 99%

Utilization of industrial waste as a novel adsorbent: Mono/competitive adsorption of chromium(VI) and nickel(II) using diatomite waste modified by EDTA

Sha

Fan

2017

Applied Organom Chemis

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The adsorption of Cr(VI) and Ni(II) using ethylenediaminetetraacetic acidmodified diatomite waste (EDTA-DW) as an adsorbent in single and binary systems was investigated. The EDTA-DW was characterized using various analytical techniques, including Fourier transform infrared spectroscopy, thermogravimetric analysis, Brunauer-Emmett-Teller measurements, X-ray diffraction, scanning electron microscopy and energy-dispersive spectrometry.The adsorption experiment was conducted by varying pH, adsorbent dosage, initial concentration and temperature. In the single system, the sorption data for Cr(VI) fitted the Langmuir isotherm, but the Ni(II) adsorption data fitted well the Freundlich isotherm. The maximum sorption capacity of Cr(VI) and Ni(II) was 2.9 mg g −1 at pH = 3 and 3.64 mg g −1 at pH = 8, respectively. The kinetic data for both Cr(VI) and Ni(II) followed well the pseudo-second-order kinetic model in single and binary systems. Meanwhile, the extended Langmuir and extended Freundlich multicomponent isotherm models were found to fit the competitive adsorption data for Cr(VI) and Ni(II). In addition, in the binary system, the existence of Ni(II) hindered the adsorption of Cr(VI), but the presence of Cr(VI) enhanced the removal of Ni(II). This study provides some realistic and valid data about the usage of modified diatomite waste for the removal of metal ions.

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Spectrophotometric Determination of Copper in Waste Water Using Liquid?Liquid Extraction in a Flow-Injection System

Cited by 20 publications

References 0 publications

Ultrasound-assisted emulsification solidified floating organic drop microextraction for the determination of trace amounts of copper in water samples

Ultrasound-assisted emulsification solidified floating organic drop microextraction for the determination of trace amounts of copper in water samples

Cloud point extraction preconcentration and spectrophotometric determination of copper in food and water samples using amino acid as the complexing agent

Utilization of industrial waste as a novel adsorbent: Mono/competitive adsorption of chromium(VI) and nickel(II) using diatomite waste modified by EDTA

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