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Dai Z, Zheng Y, Guo Z, Peng J, Jian S, Wang Z. Selective depression mechanism of polyaspartic acid and calcium oxide on arsenopyrite after copper ions activation and its effect on flotation separation performance. JOURNAL OF HAZARDOUS MATERIALS 2024; 473:134689. [PMID: 38788583 DOI: 10.1016/j.jhazmat.2024.134689] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/20/2024] [Revised: 05/08/2024] [Accepted: 05/20/2024] [Indexed: 05/26/2024]
Abstract
The arsenopyrite activated by copper ions have similar flotation properties to chalcopyrite. Polyaspartic acid (PASP) and calcium oxide (CaO) using as combination depressants for the selective separation of copper-activated arsenopyrite and chalcopyrite were carried out by micro-flotation experiments, contact angle measurements, surface adsorption capacity tests, zeta potential measurements, X-ray photoelectron spectroscopy (XPS) analyses, inductively coupled plasma-optical emission spectrometer (ICP-OES) tests and time-of-flight secondary ion mass spectrometry (ToF-SIMS) analyses, and its depression mechanism was investigated. The results of flotation experiments showed that the recovery of arsenopyrite after addition of the depressants reached only 7.80 %, while the recovery of chalcopyrite reached 94.02 %. The results of contact angles, adsorption capacity tests and zeta potential measurements showed that the PASP-CaO can selectively enhance the hydrophilicity of arsenopyrite surface, but has little effect on the chalcopyrite. XPS analyses and ICP-OES tests further verified that the depressants first eliminated the activation of copper ions and then selectively adsorbed on the surface of arsenopyrite. ToF-SIMS analyses showed that the PASP-CaO would achieve selective depression of arsenopyrite in the form of PASP, PASP-Ca complexes and Ca(OH)+, respectively. Finally, the mechanism diagram of PASP-CaO selectively depressing arsenopyrite was derived. These results will provide an excellent theoretical reference for the flotation separation of copper arsenic sulfide ore.
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Affiliation(s)
- Zhe Dai
- State Key Laboratory of Complex Nonferrous Metal Resources Clean Utilization, Kunming University of Science and Technology, Kunming 650093, China; Faculty of Land Resource Engineering, Kunming University of Science and Technology, Kunming 650093, China
| | - Yongxing Zheng
- State Key Laboratory of Complex Nonferrous Metal Resources Clean Utilization, Kunming University of Science and Technology, Kunming 650093, China.
| | - Ziqi Guo
- Faculty of Land Resource Engineering, Kunming University of Science and Technology, Kunming 650093, China
| | - Jieli Peng
- State Key Laboratory of Complex Nonferrous Metal Resources Clean Utilization, Kunming University of Science and Technology, Kunming 650093, China
| | - Sheng Jian
- Faculty of Land Resource Engineering, Kunming University of Science and Technology, Kunming 650093, China; Kunming Metallurgical Research Institute Co., Ltd., Kunming 650031, China
| | - Zhenxing Wang
- State Key Laboratory of Complex Nonferrous Metal Resources Clean Utilization, Kunming University of Science and Technology, Kunming 650093, China
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Hou Y, Feng H, He J, Meng F, Sun J, Li X, Wang X, Su Z, Sun C. Terbium alginate encapsulated CsPbI 3@Pb-MOF: a ratiometric fluorescent bead for detection and adsorption of Fe 3. Dalton Trans 2024; 53:2541-2550. [PMID: 38234224 DOI: 10.1039/d3dt04187e] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/19/2024]
Abstract
Halide perovskite nanocrystals are innovative luminescent materials for fluorescent probes with high quantum yield and narrow emission bandwidth. However, the limited stability, single-signal response, and separation challenges obstruct their widespread use in water ion detection. Herein, a ratiometric fluorescence sensor based on terbium alginate gel beads (green fluorescent, namely Tb-AG) embedded with powdered CsPbI3@Pb-MOF (red fluorescent) was prepared for fluorescent determination and adsorption of Fe3+. Pb-MOF's protection notably enhances the water stability of CsPbI3, while the energy transfer between CsPbI3@Pb-MOF and Tb3+ elevates the optical performance of CsPbI3@Pb-MOF@Tb-AG. Significantly, Fe3+ markedly suppresses CsPbI3@Pb-MOF red fluorescence at 647 nm, while not noticeably affecting Tb-AG green emission at 528 nm. The sensor exhibited a strong linear response to Fe3+ concentrations ranging from 0 to 90 μM, with a detection limit of 0.44 μM and high selectivity. The CsPbI3@Pb-MOF@Tb-AG-based sensor has been effectively validated through its successful use in detecting Fe3+ in tap and river water samples. Furthermore, CsPbI3@Pb-MOF@Tb-AG demonstrates a notable adsorption capacity of 325.4 mg g-1 Fe3+. Finally, the mechanism of Fe3+ detection and adsorption was determined.
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Affiliation(s)
- Yangwen Hou
- School of Materials Science and Engineering, Changchun University of Science and Technology, Changchun, 130022 Jilin, China
| | - Hua Feng
- Jilin Provincial Science and Technology Innovation Center of Optical Materials and Chemistry, School of Chemistry and Environmental Engineering, Changchun University of Science and Technology Changchun, Changchun, 130022 Jilin, China.
| | - Jingting He
- School of Materials Science and Engineering, Changchun University of Science and Technology, Changchun, 130022 Jilin, China
| | - Fanfei Meng
- Jilin Provincial Science and Technology Innovation Center of Optical Materials and Chemistry, School of Chemistry and Environmental Engineering, Changchun University of Science and Technology Changchun, Changchun, 130022 Jilin, China.
| | - Jing Sun
- Jilin Provincial Science and Technology Innovation Center of Optical Materials and Chemistry, School of Chemistry and Environmental Engineering, Changchun University of Science and Technology Changchun, Changchun, 130022 Jilin, China.
| | - Xiao Li
- Jilin Provincial Science and Technology Innovation Center of Optical Materials and Chemistry, School of Chemistry and Environmental Engineering, Changchun University of Science and Technology Changchun, Changchun, 130022 Jilin, China.
| | - Xinlong Wang
- Key Laboratory of Polyoxometalate Science of Ministry of Education, Northeast Normal University, Changchun, 130024 Jilin, China.
| | - Zhongmin Su
- Jilin Provincial Science and Technology Innovation Center of Optical Materials and Chemistry, School of Chemistry and Environmental Engineering, Changchun University of Science and Technology Changchun, Changchun, 130022 Jilin, China.
- State Key Laboratory of Supramolecular Structure and Materials, Institute of Theoretical Chemistry, College of Chemistry, Jilin University, Changchun, 130021 Jilin, China
| | - Chunyi Sun
- Key Laboratory of Polyoxometalate Science of Ministry of Education, Northeast Normal University, Changchun, 130024 Jilin, China.
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Fei Y, Han N, Zhang M, Yang F, Yu X, Shi L, Khataee A, Zhang W, Tao D, Jiang M. Facile preparation of visible light-sensitive layered g-C 3N 4 for photocatalytic removal of organic pollutants. CHEMOSPHERE 2022; 307:135718. [PMID: 35842043 DOI: 10.1016/j.chemosphere.2022.135718] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/20/2022] [Revised: 07/04/2022] [Accepted: 07/11/2022] [Indexed: 06/15/2023]
Abstract
The graphite-phase carbon nitride (g-C3N4) photocatalytic materials were prepared by one-step calcination method to degrade methylene blue (MB) and potassium butyl xanthate (PBX) under visible light irradiation. The prepared g-C3N4 photocatalytic materials were investigated in detail by various characterizations, and the experiments showed that the graphitic phase carbon nitride photocatalytic materials were successfully prepared by the one-step calcination method. The material possesses excellent optical properties and strong visible light absorption, thus achieving photocatalytic degradation of MB and PBX. The catalyst dosage, pH, the initial concentration of pollutants have important effects on photocatalytic activity of MB and PBX. The photocatalytic degradation efficiency was 98.99% for MB and 96.83% for PBX under the optimal conditions (catalyst dosage, initial pollutant concentration and pH value were 500 mg L-1, 20 mg L-1 and 7, respevtively). The photocatalytic mechanisms on MB and PBX were elucidated. ·OH was the key specie for MB, while ·O2- was the key specie for PBX. This study advances the development of photocatalytic technology for mineral wastewater.
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Affiliation(s)
- Yawen Fei
- School of Resources and Environmental Engineering, Shandong University of Technology, Zibo, 255000, PR China
| | - Ning Han
- Department of Materials Engineering, KU Leuven, 3001, Leuven, Belgium.
| | - Minghui Zhang
- School of Resources and Environmental Engineering, Shandong University of Technology, Zibo, 255000, PR China
| | - Feixue Yang
- School of Resources and Environmental Engineering, Shandong University of Technology, Zibo, 255000, PR China
| | - Xiaobing Yu
- Shandong Jinfu Mining Co. Ltd., Zibo, 255000, PR China
| | - Lilong Shi
- Shandong Yanggu Huatai Chemical Co. Ltd., Liaocheng, 252300, PR China
| | - Alireza Khataee
- Research Laboratory of Advanced Water and Wastewater Treatment Processes, Department of Applied Chemistry, Faculty of Chemistry, University of Tabriz, 51666-16471, Tabriz, Iran; Department of Environmental Engineering, Faculty of Engineering, Gebze Technical University, 41400, Gebze, Turkey; Department of Material Science and Physical Chemistry of Materials, South Ural State University, 454080, Chelyabinsk, Russian Federation.
| | - Wei Zhang
- Department of Materials Engineering, KU Leuven, 3001, Leuven, Belgium
| | - Dongping Tao
- School of Resources and Environmental Engineering, Shandong University of Technology, Zibo, 255000, PR China
| | - Man Jiang
- School of Resources and Environmental Engineering, Shandong University of Technology, Zibo, 255000, PR China; State Key Laboratory of Mineral Processing, Beijing, 100160, PR China.
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Zuo Q, Wu D, Cao J, Wang Z, Shi Y, Huang L. A DFT-based method to determine the ammonium-induced activation and sulfidation pathway of tenorite. J Taiwan Inst Chem Eng 2022. [DOI: 10.1016/j.jtice.2022.104221] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
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Lou J, Lu G, Wei Y, Zhang Y, An J, Jia M, Li M. Enhanced degradation of residual potassium ethyl xanthate in mineral separation wastewater by dielectric barrier discharge plasma and peroxymonosulfate. Sep Purif Technol 2022. [DOI: 10.1016/j.seppur.2021.119955] [Citation(s) in RCA: 7] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
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Testing the Capacity of Staphylococcus equorum for Calcium and Copper Removal through MICP Process. MINERALS 2021. [DOI: 10.3390/min11080905] [Citation(s) in RCA: 9] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 02/04/2023]
Abstract
This research focused on the evaluation of the potential use of a soil-isolated bacteria, identified as Staphylococcus equorum, for microbial-induced calcite precipitation (MICP) and copper removal. Isolated bacteria were characterized considering growth rate, urease activity, calcium carbonate precipitation, copper tolerance as minimum inhibitory concentration (MIC) and copper precipitation. Results were compared with Sporosarcina pasteurii, which is considered a model bacteria strain for MICP processes. The results indicated that the S. equorum strain had lower urease activity, calcium removal capacity and copper tolerance than the S. pasteurii strain. However, the culture conditions tested in this study did not consider the halophilic feature of the S. equorum, which could make it a promising bacterial strain to be applied in process water from mining operations when seawater is used as process water. On the other hand, copper removal was insufficient when applying any of the bacteria strains evaluated, most likely due to the formation of a copper–ammonia complex. Thus, the implementation of S. equorum for copper removal needs to be further studied, considering the optimization of culture conditions, which may promote better performance when considering calcium, copper or other metals precipitation.
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Adsorption and depression mechanism of an eco-friendly depressant PCA onto chalcopyrite and pyrite for the efficiency flotation separation. Colloids Surf A Physicochem Eng Asp 2021. [DOI: 10.1016/j.colsurfa.2021.126574] [Citation(s) in RCA: 9] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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Effect of Ferric Ions on Sulfidization Flotation of Oxidize Digenite Fine Particles and Their Significance. MINERALS 2021. [DOI: 10.3390/min11030305] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
Abstract
Digenite fine particles are easily oxidized and ferric ions (Fe3+) commonly exist in the flotation pulp of digenite. This study investigated the effect of Fe3+ on the sulfidization flotation of oxidized digenite fine particles using sodium butyl xanthate (SBX) as a collector. The results of microflotation experiments show that the flotation rate and recovery of oxidized digenite fine particles can be improved by adding Na2S and SBX, whereas the existence of large amounts of Fe3+ is not beneficial for the sulfidization flotation of digenite. The results of Fe3+ adsorption, zeta potential, and contact angle measurements indicate that Fe3+ can be adsorbed on the digenite surface mainly in the form of Fe(OH)3, which hinders the adsorption of SBX and significantly reduces the surface hydrophobicity of digenite. X-ray photoelectron spectroscopy analysis further suggests that the poor surface hydrophobicity of digenite in the presence of Fe3+ is due to the production of large amounts of hydrophilic iron and copper oxides/hydroxides on the surface. Furthermore, optical microscopy analysis shows that these hydrophilic species effectively disperse digenite fine particles in the pulp, which eventually leads to the poor floatability of digenite. Therefore, it is necessary to reduce the amount of Fe3+ present in the pulp and adsorbed on digenite surface before sulfidization to realize effective separation of oxidized digenite fine particles and iron sulfide minerals.
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