A high selective ion-imprinted polymer grafted on a novel nanoporous material for efficient gold extraction

Abstract

In this work, for the first time, an ion-imprinted polymer was developed for selective extraction and determination of gold ions. To increase the sorbent efficiency, this polymer was coated on a novel nanoporous carbon-based material, carbohydrate-derived Max-Planck Gesellschaft 1, which is also the first example of grafting imprinted polymer on nanoporous-carbon material. These particles were applied successfully for preconcentration of ultratrace amount of gold ions, following determination by flame atomic absorption spectrometry. Some effective factors on the efficiency of gold ions extraction, such as concentration and volume of eluent, sample and eluent flow rates, and also effect of interfering ions especially palladium and platinum ions, were investigated. The LOD was determined to be 0.27 ng/mL. Furthermore, the precision of the method was calculated to be 2.14% under optimal conditions with recovery more than 97.3%. The technique was also used to determine the concentration of gold ions in mine stone samples with satisfactory results. The accuracy of this method was investigated by determination of gold ions concentrations in several reference materials with certified gold content.

Molecular Imprinting for High-Added Value Metals: An Overview of Recent Environmental Applications

“…Another research team [37] developed an ion-imprinted polymer for selective extraction and determination of gold ions. To increase the adsorbent efficiency, this polymer was coated on a novel nanoporous carbon-based material, carbohydrate-derived Max-Planck Gesellschaft 1, which is also the first example of grafting imprinted polymer on nanoporous-carbon material.…”

Polyol route synthesis of a Fe3O4@CuS nanohybrid for fast preconcentration of gold ions

“…13 Among different separation/enrichment techniques, adsorption is a simple and more economic technique. Different sorbents such as polymercarbon nanotubes, 14 modied sawdust, 15 cellulose, 16 modied Fe 3 O 4 , 17 titanium dioxide, 18 persimmon powder, 19 ion imprinted polymers, 20 polymer coated nanoporous-carbon 21 and mesoporous carbon 22 have been used as sorbents for gold adsorption.…”

Speciation, adsorption and determination of chromium(III) and chromium(VI) on a mesoporous surface imprinted polymer adsorbent by combining inductively coupled plasma atomic emission spectrometry and UV spectrophotometry

“…The most widely used separation methods for chromium speciation include precipitation separation , SPE , chromatography , and liquid–liquid extraction . Among them, SPE is the most commonly used separation technique for the speciation of chromium due to the advantage of flexibility and high enrichment factors . Numerous functional materials have been prepared and applied for speciation analysis of chromium as adsorbents, such as agro‐waste materials , cation exchanger , ionic‐liquids‐functionalized silica , and thiol‐functionalized MCM‐41 .…”