月桂酰基谷氨酸钠在菱锌矿表面的吸附机理

doi:10.12068/j.issn.1005-3026.2025.20230319

摘要/Abstract

摘要：

随着易分选硫化锌矿日益消耗，氧化锌矿的开发显得尤为重要.以月桂酰基谷氨酸钠(SLG)为捕收剂，系统研究了其对菱锌矿的浮选行为及吸附机理，为氧化锌矿石高效浮选捕收剂的开发提供参考.浮选试验结果表明，与月桂酸钠(SL)相比，SLG对菱锌矿具有更好的捕收能力，在pH为弱碱性、SLG用量为80 mg/L时，菱锌矿回收率可达94.8%.通过接触角、Zeta电位、红外光谱测试分析结果表明，捕收剂SLG与菱锌矿表面主要发生了化学吸附，由XPS检测分析推断主要是SLG分子酰胺基团中C==O与矿物表面位点发生了键合作用.

关键词: 月桂酰基谷氨酸钠(SLG), 菱锌矿, 吸附机理, 捕收剂, 浮选

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

中图分类号:

TD 923

刘文刚, 丁盛院, 刘文宝, 赵亮. 月桂酰基谷氨酸钠在菱锌矿表面的吸附机理[J]. 东北大学学报（自然科学版）, 2025, 46(5): 153-158.

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.

图/表 11

图1 菱锌矿的 X 射线衍射图

Fig.1 X-ray diffraction patterns of smithsonite

图2 SLG和SL质量浓度对菱锌矿浮选回收率的影响

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

图3 pH变化对菱锌矿浮选回收率的影响

Fig.3 Effect of pH variation on smithsonite flotation recovery

表1 SLG作用前后菱锌矿表面接触角的变化

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

图4 添加SLG前后菱锌矿表面Zeta电位随pH变化

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

图5 SLG与菱锌矿作用前后的红外光谱a—SLG； b—菱锌矿与SLG作用后； c—菱锌矿.

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

图6 菱锌矿与SLG作用前后XPS能谱图

Fig.6 XPS survey spectra of smithsonite before and

图7 菱锌矿表面C 1s窄谱扫描图

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

图8 菱锌矿表面Zn 2p窄谱扫描图

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

图9 菱锌矿表面O 1s窄谱扫描图

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

图10 菱锌矿表面N 1s窄谱扫描图

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

参考文献 15

[1]	中国地质调查局全球矿产资源战略研究中心. 《全球矿产资源储量评估报告2024》发布［J］. 黄金科学技术， 2024，32（2）： 240.
	Global Mineral Resource Strategy Research Center of China Geological Survey. Global mineral reserve estimation report 2024 released［J］. Gold Science and Technology， 2024， 32（2）： 240.
[2]	Ejtemaei M， Gharabaghi M， Irannajad M. A review of zinc oxide mineral beneficiation using flotation method［J］. Advances in Colloid and Interface Science， 2014， 206： 68-78.
[3]	Shi Q， Feng Q M， Zhang G F， et al. Electrokinetic properties of smithsonite and its floatability with anionic collector［J］. Colloids and Surfaces A： Physicochemical and Engineering Aspects， 2012， 410： 178-183.
[4]	黎颖娴，刘海军，张晔翔，等.氨基酸表面活性剂的性能研究［J］.广东化工，2024，51（10）：33-35.
	Li Ying-xian， Liu Hai-jun， Zhang Ye-xiang. Properties studies of amino acid surfactant［J］. Guangdong Chemical Industry， 2024，51（10）： 33-35.
[5]	李彩霞，白阳，赵鑫，等.新型氨基酸类捕收剂在钼尾矿浮选中的应用［J］.非金属矿，2019，42（5）：55-57.
	Li Cai-xia， Bai Yang， Zhao Xin， et al. Application of novel amino acid collectors in flotation of molybdenum tailings［J］. Nonferrous Metals， 2019， 42（5）： 55-57.
[6]	Zhao L， Liu W G， Duan H， et al. Design and selection of flotation collectors for zinc oxide minerals based on bond valence model［J］. Minerals Engineering， 2021， 160： 106681.
[7]	Cao Q B， Zou H， Liu D， et al. Flotation separation of smithsonite from calcite using an amino-acid collector［J］. Separation and Purification Technology， 2022， 281： 119980.
[8]	Wu J H， Xu L H， Wang D H， et al. Selective adsorption of 1-hydroxyethylidene-1，1-diphosphonic acid on calcite surface in smithsonite flotation system［J］. Minerals Engineering， 2023， 203： 116893.
[9]	Zeng Y H， Yao X， Liu G X， et al. Flotation behavior and mechanism of phenylpropenyl hydroxamic acid for the separation of smithsonite and calcite［J］. Journal of Molecular Liquids， 2021， 339： 116893.
[10]	Feng Q C， Wen S M， Zhao W J， et al. Adsorption of sulfide ions on cerussite surfaces and implications for flotation［J］. Applied Surface Science， 2016， 360： 365-372.
[11]	Wang J Y， Xie L， Liu Q X， et al. Effects of salinity on xanthate adsorption on sphalerite and bubble-sphalerite interactions［J］. Minerals Engineering， 2015， 77： 34-41.
[12]	Liao R P， Feng Q C， Wen S M， et al. Hydrolytic polymaleic anhydride as a depressant for flotation separation of fine smithsonite from calcite： an experimental and MD study［J］. Colloids and Surfaces A： Physicochemical and Engineering Aspects， 2023， 678： 132471.
[13]	Liu W B， Peng X Y， Liu W G， et al. Novel polyhydroxy cationic collector N-（2，3-propanediol）-N-dodecylamine： synthesis and flotation performance to hematite and quartz［J］. International Journal of Mining Science and Technology， 2023， 33（1）： 115-122.
[14]	Bai S J， Li C L， Fu X Y， et al. Characterization of zinc sulfide species on smithsonite surfaces during sulfidation processing： effect of ammonia liquor［J］. Journal of Industrial and Engineering Chemistry， 2018， 61： 19-27.
[15]	Liu W G， Zhao L， Liu W B， et al. Enhanced flotation of smithsonite from calcite based on the synergistic action of carboxylated chitosan and sodium carbonate［J］. Advanced Powder Technology， 2023， 34（12）： 104261.