Adsorption Mechanism of Smithsonite Surfaces by Sodium Lauryl Glutamate

doi:10.12068/j.issn.1005-3026.2025.20230319

Abstract

Abstract:

With the increasing depletion of easily sortable zinc sulphide ores， it is significant important to develop zinc oxide ores. The flotation behavior and adsorption mechanism of smithsonite was systematically investigated using sodium lauryl glutamate （SLG） as a collector to provide a reference for the development of high-efficiency flotation collectors for zinc oxide ores. The flotation test results show that SLG has a better ability to collect smithsonite compared with sodium laurate （SL）， with a flotation recovery of smithsonite reaching to 94.8% at a weakly alkaline pH and collector concentration of 80 mg/L. The findings from contact angle， Zeta potential and FT-IR analysis demonstrate that the primary chemical adsorption between SLG and smithsonite surfaces， as evidenced by XPS analysis， is predominantly attributable to the bonding between C==O in amide group of the SLG molecule and the mineral surface sites.

Key words: sodium lauryl glutamate（SLG）, smithsonite, adsorption mechanism, collector, flotation

CLC Number:

TD 923

Wen-gang LIU, Sheng-yuan DING, Wen-bao LIU, Liang ZHAO. Adsorption Mechanism of Smithsonite Surfaces by Sodium Lauryl Glutamate[J]. Journal of Northeastern University(Natural Science), 2025, 46(5): 153-158.

Figures/Tables 11

Fig.1 X-ray diffraction patterns of smithsonite

Fig.2 Effect of SLG and SL mass concentration on smithsonite flotation recovery

Fig.3 Effect of pH variation on smithsonite flotation recovery

Table 1 Change of contact angle on the smithsonite surfaces before and after treatment with SLG

物料	菱锌矿	菱锌矿+SLG
接触角θ/(°)	29.03	91.21

Fig.4 Smithsonite Zeta potential variation with pH before and after treatment of SLG

Fig.5 FT-IR spectra of SLG before and after treatment with smithsonite

Fig.6 XPS survey spectra of smithsonite before and

Fig.7 Narrow spectrum scanning of C 1s on smithsonite surfaces

Fig.8 Narrow spectrum scanning of Zn 2p on smithsonite surfaces

Fig.9 Narrow spectrum scanning of O 1s on smithsonite surfaces

Fig.10 Narrow spectrum scanning of N 1s on smithsonite surfaces after treatment with SLG

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