Hetero-difunctional Reagent with Superior Flotation Performance to Chalcopyrite and the Associated Surface Interaction Mechanism

Langmuir : the ACS Journal of Surfaces and Colloids
Sheng LiuHongbo Zeng

Abstract

Surface modification by chemical reagents is of profound importance to modulate the surface characteristic and functionality of materials, which has attracted tremendous interest in many research fields and industrial applications, such as froth flotation of minerals. In this work, a new reagent S-[(2-hydroxyamino)-2-oxoethyl]- O-octyl-dithiocarbonate ester (HAOODE) with heterodifunctional ligands was designed and synthesized to improve the flotability of chalcopyrite (CuFeS2). Fourier transform infrared spectroscopy and X-ray photoelectron spectroscopy results showed the co-adsorption of heterodifunctional ligands (i.e., dithiocarbonate and hydroxamate groups) of HAOODE on chalcopyrite via Cu(I)-S and Cu(II)-O covalent bonds. The bubble probe atomic force microscopy (AFM) technique was employed to quantitatively measure the air bubble-chalcopyrite interactions with and without the reagent adsorption. AFM force results revealed that the bubble could be more readily attached to flat chalcopyrite after HAOODE treatment under different hydrodynamic conditions because of the enhanced hydrophobic interaction, with the decay length D0 increasing from 0.65 to 1.20 nm. The calculated bubble-particle interaction forces also demonstrated...Continue Reading

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Mar 22, 2018·Advances in Colloid and Interface Science·Yaowen XingHans-Jürgen Butt

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Citations

Oct 7, 2019·Journal of Colloid and Interface Science·Chen ShiHongbo Zeng
Aug 1, 2021·Advances in Colloid and Interface Science·Lei XieHongbo Zeng
Nov 7, 2019·Langmuir : the ACS Journal of Surfaces and Colloids·Xiaoping HuangHong Zhong
Feb 6, 2020·Langmuir : the ACS Journal of Surfaces and Colloids·Lei XieHongbo Zeng

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