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Nickel (II) Preconcentration and Speciation Analysis During Transport from Aqueous Solutions Using a Hollow-fiber
Ana Nelly Bautista-Flores1, Eduardo Rodríguez De San Miguel2, Josefina de Gyves3
1Química Industrial, Universidad Tecnológica del Sureste de Veracruz, Av. Universidad Tecnológica Lote Grande #1, Nanchital 93770, Veracruz, Mexico. bafa27@hotmail.com.
Membranes
|June 25, 2014
Summary
This study optimized nickel (II) preconcentration using a hollow fiber supported liquid membrane (HFSLM) with Kelex 100. High preconcentration factors up to 4240 were achieved, demonstrating effective nickel separation and analysis.
Area of Science:
- Analytical Chemistry
- Environmental Science
Background:
- Nickel (II) analysis requires efficient preconcentration and speciation techniques.
- Hollow Fiber Supported Liquid Membranes (HFSLM) offer a promising platform for metal ion separation.
Purpose of the Study:
- To investigate and optimize nickel (II) preconcentration and speciation using an HFSLM.
- To determine the influence of various parameters on the preconcentration factor (E).
Main Methods:
- Utilized a hollow fiber supported liquid membrane (HFSLM) with Kelex 100 as the carrier.
- Employed a 3-factor Doehlert matrix response surface methodology for optimization.
- Investigated the impact of donor pH, acceptor pH, and carrier concentration.
Main Results:
- Achieved high preconcentration factors for nickel (II), reaching up to 4240.
- Nickel preconcentration was largely unaffected by common inorganic anions and dissolved organic matter, except for cyanide.
- The process demonstrated a kinetic-controlled regime, with preconcentration increasing with temperature.
Conclusions:
- The developed HFSLM method is effective for nickel (II) preconcentration and speciation.
- The method shows robustness against common interfering substances, enhancing its applicability.
- Optimization using response surface methodology successfully maximized preconcentration efficiency.
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