Application of Carbon-loaded Polyurethane Foam Produced by Ethanol Media in Determination of Gold in Geological Samples

Yi-fei MA; Guang-heng WANG; Ni ZHANG; Wen-xu GAO; Bin QUAN

doi:10.15898/j.cnki.11-2131/td.201801150005

Rock and Mineral Analysis > 2018 > 37(5): 533-540. > DOI: 10.15898/j.cnki.11-2131/td.201801150005

Yi-fei MA, Guang-heng WANG, Ni ZHANG, Wen-xu GAO, Bin QUAN. Application of Carbon-loaded Polyurethane Foam Produced by Ethanol Media in Determination of Gold in Geological Samples[J]. Rock and Mineral Analysis, 2018, 37(5): 533-540. DOI: 10.15898/j.cnki.11-2131/td.201801150005

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Application of Carbon-loaded Polyurethane Foam Produced by Ethanol Media in Determination of Gold in Geological Samples

1.
College of Chemistry and Chemical Engineering, Xi'an University of Science and Technology, Xi'an 710054, China
2.
Xi'an Northwest Geological Institute for Nonferrous Metals Co., LTD., Xi'an 710054, China

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Received Date: January 14, 2018
Revised Date: March 04, 2018
Accepted Date: May 06, 2018
Published Date: August 31, 2018

Abstract

HIGHLIGHTS
(1) Activated carbon-ethanol solution was used to prepare carbon-loaded polyurethane foam. The preparation time was greatly shortened, and the preparation efficiency was significantly improved.

(2) The stable adsorption capacity of activated carbon was constant for different preparation methods.

(3) By using carbon-loaded polyurethane foam to adsorb gold, the time of oscillation can be reduced to 20 min, and the linear range significantly increased.

ABSTRACT

BACKGROUND Compared with unloaded polyurethane foam, carbon-loaded polyurethane foam can effectively increase the adsorption capacity of gold, but the existing preparation method of carbon-loaded polyurethane foam is not efficient.
OBJECTIVESTo shorten the preparation time of carbon-loaded polyurethane foam, improve the preparation efficiency, and optimize experimental conditions.
METHODSActivated carbon-ethanol solution was used to prepare carbon-loaded polyurethane foam. By optimizing conditions such as the load medium type, reagent concentration, and soaking time, the time for preparing 100 carbon-loaded polyurethane foams can be reduced to under 30 min. A method for the determination of gold in geological samples by Inductively Coupled Plasma-Optical Emission Spectrometry (ICP-OES) combined with carbon-loaded polyurethane foam is described.
RESULTSThe experimental results show that the oscillation time can be shortened to 20 min. The mass concentration of gold has a good linear relationship with the spectral intensity in the range of 0-100 μg/mL with the correlation coefficient of 0.9997. The detection limit (3σ) is 0.0066 μg/g, and the relative standard deviations of the results are 0.81%-2.11% (n=10).
CONCLUSIONSFour certified reference materials of gold ore are used to evaluate the method. The results show good accuracy and precision, and the method meets the requirements of geological sample analysis.

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References (18)

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Application of Carbon-loaded Polyurethane Foam Produced by Ethanol Media in Determination of Gold in Geological Samples