Sorption and desorption characteristics of cobalt in clay: Effect of humic acids

Baek, Kitae; Yang, Ji‐Won

doi:10.1007/bf02705582

Cited by 18 publications

(6 citation statements)

References 12 publications

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“…As shown in Fig. 5 can be dissociated easily, and the deprotonated functional groups can bind with cadmium ions [15]. Previous research has also shown that copper removal increased with the increased acidity of the feed solution [16].…”

Section: -4 Effect Of Phmentioning

confidence: 86%

Micellar Enhanced Ultrafiltration (MEUF) and Activated Carbon Fiber (ACF) Hybrid Processes for the Removal of Cadmium from an Aqueous Solution

Rafique¹,

Lee²

2014

Korean Chemical Engineering Research

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− Micellar enhanced ultrafiltration (MEUF) was used to remove cadmium from an aqueous solution using sodium dodecyl sulfate (SDS) as a surfactant. Operational parameters such as initial permeate flux, retentate pressure, initial cadmium concentration, pH solution, molecular weight cut-off (MWCO), and molar ratio of cadmium to SDS were investigated. Removal efficiency of cadmium from an aqueous solution increased with an increase of retentate pressure, pH solution and molar ratio of cadmium to SDS, and decreased with an increase of initial permeate flux. Higher removal efficiency of cadmium from the aqueous solution was achieved using lower MWCO (smaller membrane pore size). Under optimized experimental condition, cadmium removal efficiency reached 74.6 % within an hour. Using MEUF-ACF hybrid process the removal efficiency of both cadmium and SDS was found to be over 90%.

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Section: -4 Effect Of Phmentioning

confidence: 86%

Micellar Enhanced Ultrafiltration (MEUF) and Activated Carbon Fiber (ACF) Hybrid Processes for the Removal of Cadmium from an Aqueous Solution

Rafique¹,

Lee²

2014

Korean Chemical Engineering Research

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“…At low pH, there are a lot of protons in solution, and it makes carboxylic or phenyl group protonated. On the contrary, at higher pH, H + bound with functional groups can be dissociated easily, and the deprotonated functional groups can bind with cobalt ions [26,27]. Furthermore, at higher concentration, more precipitation of cobalt is expected in the form of hydroxide [27].…”

Section: Effect Of Humic Acid Concentration and Phmentioning

confidence: 92%

Humic substance-enhanced ultrafiltration for removal of cobalt

Kim

Baek

Kim

et al. 2005

Journal of Hazardous Materials

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“…Under acidic conditions, due to competition with H + ions, less cadmium was adsorbed onto the micelle surface leading to a reduction in cadmium removal. On the contrary, at higher pH, H + bound with functional groups, can be dissociated easily, and the deprotonated functional groups can bind with cadmium ions [17]. Previous research has also shown that copper removal increased with the increased acidity of feed solution [18].…”

Section: Effect Of Phmentioning

confidence: 95%

Removal of cadmium ion using micellar-enhanced ultrafiltration (MEUF) and activated carbon fiber (ACF) hybrid processes: adsorption isotherm study for micelle onto ACF

Rafique

Zhan

Son

et al. 2016

Desalination and Water Treatment

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A B S T R A C TMicellar-enhanced ultrafiltration (MEUF) was applied to remove cadmium ion from wastewater using sodium dodecyl sulfate (SDS) as a micelle in this study. Investigations were carried out on operational parameters such as initial permeate flux, retentate pressure, initial cadmium concentration, pH solution, molecular weight cut-off (MWCO), and molar ratio of cadmium to SDS. Removal efficiency of cadmium increased with increase in retentate pressure, pH solution, and molar ratio of cadmium to SDS and decreased with increase in initial permeate flux. Higher removal efficiency of cadmium was achieved using lower MWCO. In optimized experimental condition, cadmium removal efficiency reached 75% within an hour. With MEUF-ACF hybrid process, removal efficiencies of cadmium and SDS were found to be over 99 and 90%, respectively. Freundlich isotherm equation fitted better with experimental results on adsorption of SDS by ACF than Langmuir isotherm equation. Overall SDS removal efficiency of ACF unit in series was 90%.

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Sorption and desorption characteristics of cobalt in clay: Effect of humic acids

Cited by 18 publications

References 12 publications

Micellar Enhanced Ultrafiltration (MEUF) and Activated Carbon Fiber (ACF) Hybrid Processes for the Removal of Cadmium from an Aqueous Solution

Micellar Enhanced Ultrafiltration (MEUF) and Activated Carbon Fiber (ACF) Hybrid Processes for the Removal of Cadmium from an Aqueous Solution

Humic substance-enhanced ultrafiltration for removal of cobalt

Removal of cadmium ion using micellar-enhanced ultrafiltration (MEUF) and activated carbon fiber (ACF) hybrid processes: adsorption isotherm study for micelle onto ACF

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