Application of a new depressant dithiocarbamate chitosan in separation of chalcopyrite and molybdenite

Hao, Jiamei; Liu, Jian; Qin, Xiaoyan; Gao, Hulin; Bai, Xuduo; Wen, Shuming

doi:10.1016/j.colsurfa.2021.127920

Cited by 16 publications

(3 citation statements)

References 29 publications

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“…The symmetrical C-O-C stretching vibration peak appeared at 1065 cm −1 . The stretching vibrational peaks of C=O (amide band I), N-H (amide band II) and C-N (amide band III) were found at 1645, 1590 and 1370 cm −1 , respectively [30].…”

Section: Characterization Of Clitmentioning

confidence: 98%

Water-Recyclable Chitosan-Based Ion-Imprinted Thermoresponsive Hydrogel for Rare Earth Metal Ions Accumulation

Qiu

Ding

Tang

et al. 2022

IJMS

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The demand for rare earth metal increases rapidly in the modern high-tech industry and therefore the accumulation of rare earth metal ions from an aqueous environment becomes a significant concern worldwide. In this paper, a water-recyclable chitosan-based La3+-imprinted thermoresponsive hydrogel (CLIT) was prepared to accumulate La3+ from solution. The CLIT was characterized by DSC, FITR, Raman spectroscopy, XPS, and SEM, which revealed obvious reversible thermosensitivity and imprinted sites of La3+ ions. An adsorption capacity of 112.21 mg/g to La3+ ions was achieved on CLIT under its optimum adsorption conditions (pH 5, 50 °C, 60 min). The adsorption could be well illustrated by second-order kinetics and Freundlich isotherm models. The La3+-adsorbed CLIT could be recycled only by rinsing with 10 °C cold water, with a desorption rate of 96.72%. After ten cycles of adsorption-desorption, CLIT retained good adsorption capability. In the solution containing six ions, the adsorption coefficients kLa3+/Mn+ of CLIT were 2.04–3.51 times that of non-imprinted hydrogel, with kLa3+/Y3+, kLa3+/Gd3+, kLa3+/Al3+, kLa3+/Fe3+ and kLa3+/Cu2+ being 1.67, 2.04, 3.15, 2.72 and 4.84, respectively.

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Section: Characterization Of Clitmentioning

confidence: 98%

Water-Recyclable Chitosan-Based Ion-Imprinted Thermoresponsive Hydrogel for Rare Earth Metal Ions Accumulation

Qiu

Ding

Tang

et al. 2022

IJMS

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“…The derivatives of CTS, for example, N-carboxymethyl CTS acts as a selective depressant of serpentine to promote the separation of serpentine and pyrite, and also as an effective depressant of calcite during calcite/apatite separation (Zhang et al, 2017). Dithiocarbamate chitosan (DTC-CTS) was also found to be a selective depressant for chalcopyrite in chalcopyrite/molybdenite flotation (Hao et al, 2022). However, no report on the application and mechanism of CTS in the separation of specularite and aegirite can be found.…”

Section: Introductionmentioning

confidence: 99%

Effective separation of specularite and aegirite using chitosan as a novel depressant

Li¹,

Zhang²,

Gao³

et al. 2022

Physicochem. Probl. Miner. Process.

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As a typical iron-bearing silicate gangue, aegirite often associates with specularite. Due to the iron element contained in aegirite, it has similar surface properties to specularite. Flotation is by far one of the most efficient methods of processing this kind of iron ore. But the traditional depressants unable to take action in the separation of specularite and aegirite. Chitosan was used as a novel depressant to attempt to separate specularite from aegirite through microflotation tests, adsorption tests, contact angle measurements, Zeta potential measurements, and XPS analysis. The flotation results indicate that chitosan show more strong depression effect on specularite than aegirite. Zeta potential measurements, contact angle measurements and adsorption tests demonstrate that chitosan is more inclined to adsorb on the specularite surface than aegirite, which hinders the subsequent adsorption of collector sodium oleate and increases difference in hydrophobicity between the two minerals. The XPS results of specularite validate the adsorption of chitosan on specularite, and illustrate that electrons of chitosan were partially transferred to oxygen and iron atoms in specularite during the adsorption process.

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“…Molybdenum is a strategic metal with excellent properties. It is widely used in metallurgy, aerospace, electrical, chemical and other fields due to its high strength, low density, chemical stability, good corrosion resistance and high thermal conductivity [1][2][3]. Molybdenite is the main raw material for molybdenum extraction [4].…”

Section: Introductionmentioning

confidence: 99%

The Evaluation of Carrageenan as a Novel and Environmentally Friendly Molybdenite Depressant

Zhao

Chen

et al. 2022

Minerals

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In order to achieve the effective separation of copper-molybdenum in the presence of xanthate and kerosene, carrageenan was explored as a novel environmentally friendly molybdenite depressant in this work. The flotation behavior of molybdenite was studied by micro-flotation tests, and the depression mechanism was investigated through zeta potential, Fourier Transform Infrared Spectroscopy (FTIR) and atomic force microscope (AFM) analysis. The flotation results showed that molybdenite was significantly depressed by carrageenan in the pH range of 6–12 even in the presence of xanthate and kerosene. Zeta potential, FTIR and AFM measurement demonstrated that carrageenan could adsorb strongly on the molybdenite surface and change the surface wettability of molybdenite, thus significantly reducing the floatability of molybdenite.

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Application of a new depressant dithiocarbamate chitosan in separation of chalcopyrite and molybdenite

Cited by 16 publications

References 29 publications

Water-Recyclable Chitosan-Based Ion-Imprinted Thermoresponsive Hydrogel for Rare Earth Metal Ions Accumulation

Water-Recyclable Chitosan-Based Ion-Imprinted Thermoresponsive Hydrogel for Rare Earth Metal Ions Accumulation

Effective separation of specularite and aegirite using chitosan as a novel depressant

The Evaluation of Carrageenan as a Novel and Environmentally Friendly Molybdenite Depressant

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