Cobalt and nickel uptake by silica-based extractants
Cobalt and nickel uptake by silica-based extractants
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二氧化硅基萃取剂对钴和镍的吸收
DOI:
10.1080/01496395.2017.1405034
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发表时间:
2017
影响因子:
2.8
通讯作者:
Pepper S
中科院分区:
文献类型:
--
作者:
Pepper S
The pKas of ethyl/butyl phosphonate silica (EBP-Si) have been determined, and the removal of cobalt and nickel from solution was investigated as a function of various parameters and compared with those of Purolite S950. pH uptake experiments suggested a combination of ion exchange and acid dissociation of the surface occurring. Isotherm data, fitted using the Langmuir and Dubinin–Radushkevich (D-R) models, indicated that stronger complexes formed with S950 than with EBP-Si. Kinetic data, fitted using a pseudo-second-order model, suggested that the rate-determining process is the reaction of metal ions with the chelating functionality of the resin. Uptake by EBP-Si is two to three times faster than that on S950.
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DOI:
--
发表时间:
2012
期刊:
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2013
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1994
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Talanta: The International Journal of Pure and Applied Analytical Chemistry
影响因子:
--
作者:
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