Selective online solid-phase extraction of copper using p-morpholino-methylcalix[4]arene appended silica-based column

This study deals with investigation of selectivity of p-morpholino-methylcalix[4]arene appended silica from a group of metal ions having similar charge and radii. The values of distribution ratio revealed that modified silica possess higher selectivity for Cu 2+ . In addition, relative selectivity c...

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Bibliographic Details
Published in:Separation science and technology 2020-06, Vol.55 (9), p.1650-1655
Main Authors: Memon, Naeem A., Memon, Fakhar N., KARA, Hatice K., KARA, Hüseyin, Sherazi, Sayed T. H., Memon, Ayaz A., Memon, Shahabuddin, Leghari, Muhammad K.
Format: Article
Language:English
Subjects:
Adsorption
atomic absorption spectroscopy
Cadmium
Calixarene
Carbon dioxide
Cobalt
Coefficients
Copper
Heavy metals
HPLC
Lakes
Lead
Metal ions
Selectivity
Silica
silica resin
Silicon dioxide
Solid phases
solid-phase extraction
Water analysis
Water sampling
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Summary:This study deals with investigation of selectivity of p-morpholino-methylcalix[4]arene appended silica from a group of metal ions having similar charge and radii. The values of distribution ratio revealed that modified silica possess higher selectivity for Cu 2+ . In addition, relative selectivity coefficients of modified silica were found to be 24.1, 13.8, 8.6 and 4.01 for Cu 2+ /Ni 2+ , Cu 2+ /Co 2+ , Cu 2+ /Cd 2+ , Cu 2+ /Pb 2+ , respectively. The maximum adsorption capacity was 1.5 mmolg −1 . The reusability data suggested no any loss of adsorption capacity of this material up to 10 cycles. The developed material was also applied for determination of copper in lake water samples with satisfactory results.
ISSN:0149-6395
1520-5754
DOI:10.1080/01496395.2019.1600551