|
1
|
You M, Hu Y, Zhou C, Liu G. Speciation Characterization and Environmental Stability of Arsenic in Arsenic-Containing Copper Slag Tailing. Molecules 2024; 29:1502. [PMID: 38611783 PMCID: PMC11012958 DOI: 10.3390/molecules29071502] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/27/2024] [Revised: 03/19/2024] [Accepted: 03/25/2024] [Indexed: 04/14/2024] Open
Abstract
The increasing presence of arsenic-containing impurities within Cu ores can adversely affect the smelting process and aggravate the environmental impact of slag tailing. This study investigates the geochemical, mineralogical, and chemical speciation characteristics to better understand the association and environmental stability of metal(loid)s in copper slag tailing. The results indicate that the predominant chemical compositions of the selected slag tailing are Fe2O3 (54.8%) and SiO2 (28.1%). These tailings exhibit potential for multi-elemental contamination due to elevated concentrations of environmentally sensitive elements. Mineral phases identified within the slag tailings include silicate (fayalite), oxides (magnetite and hematite), and sulfides (galena, sphalerite, arsenopyrite, and chalcopyrite). The consistent presence of silicate, iron, arsenic, and oxygen in the elemental distribution suggests the existence of arsenic within silicate minerals in the form of Si-Fe-As-O phases. Additionally, arsenic shows association with sulfide minerals and oxides. The percentages of arsenite (As(III)) and arsenate (As(V)) within the selected slag tailings are 59.4% and 40.6%, respectively. While the slag tailings are deemed non-hazardous due to the minimal amounts of toxic elements in leachates, proper disposal measures should be taken due to the elevated carbonate-bound levels of As and Cu present in these tailings.
Collapse
Affiliation(s)
- Mu You
- School of Biology Engineering, Huainan Normal University, Huainan 232001, China;
| | - Yunhu Hu
- School of Chemistry and Materials Engineering, Huainan Normal University, Huainan 232001, China;
| | - Chuncai Zhou
- School of Resources and Environmental Engineering, Hefei University of Technology, No. 193, Road Tunxi, Hefei 230009, China
| | - Guijian Liu
- School of Earth and Space Sciences, University of Science and Technology of China, Hefei 230026, China;
| |
Collapse
|
|
2
|
Jiang Z, Xue B, Mai X, Wu C, Zeng L, Xie L, Zheng Q. Integrating Fly Ash-Controlled Surface Morphology and Candle Grease Coating: Access to Highly Hydrophobic Poly (L-lactic Acid) Composite for Anti-Icing Application. NANOMATERIALS (BASEL, SWITZERLAND) 2023; 13:1230. [PMID: 37049323 PMCID: PMC10096872 DOI: 10.3390/nano13071230] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 02/28/2023] [Revised: 03/27/2023] [Accepted: 03/27/2023] [Indexed: 06/19/2023]
Abstract
New ways of recycling fly ash are of great significance for reducing the environmental pollution. In this work, biodegradable hydrophobic poly (L-lactic acid)/fly ash composites for anti-icing application were successfully fabricated via a facile solvent-volatilization-induced phase separation approach. A silane coupling agent of 3-(Trimethoxysilyl) propyl methacrylate was used to decorate a fly ash surface (FA@KH570) for strengthening the interface bonding between fly ash and poly (L-lactic acid). Moreover, FA@KH570 could obviously enhance the crystallinity of poly (L-lactic acid) (PLLA)/FA@KH570 composites, which accelerated the conversion from the liquid-liquid to the liquid-solid phase separation principle. Correspondingly, the controllable surface morphology from smooth to petal-like microspheres was attained simply by adjusting the FA@KH570 content. After coating nontoxic candle grease, the apparent contact angle of 5 wt% PLLA/FA@KH570 composite was significantly increased to an astonishing 151.2°, which endowed the composite with excellent anti-icing property. This strategy paves the way for recycling waste fly ash and manufacturing hydrophobic poly (L-lactic acid) composite for potential application as an anti-icing material for refrigerator interior walls.
Collapse
Affiliation(s)
- Zhiqiang Jiang
- Department of Polymer Materials and Engineering, College of Materials and Metallurgy, Guizhou University, Guiyang 550025, China; (Z.J.); (X.M.); (C.W.); (L.Z.)
- State Key Laboratory of Public Big Data, Guizhou University, Guiyang 550025, China
| | - Bai Xue
- Department of Polymer Materials and Engineering, College of Materials and Metallurgy, Guizhou University, Guiyang 550025, China; (Z.J.); (X.M.); (C.W.); (L.Z.)
- State Key Laboratory of Public Big Data, Guizhou University, Guiyang 550025, China
- National Engineering Research Center for Compounding and Modification of Polymer Materials, National and Local Joint Engineering Research Center for Functional Polymer Membrane Materials and Membrane Processes, Guiyang 550014, China
| | - Xiaoping Mai
- Department of Polymer Materials and Engineering, College of Materials and Metallurgy, Guizhou University, Guiyang 550025, China; (Z.J.); (X.M.); (C.W.); (L.Z.)
- State Key Laboratory of Public Big Data, Guizhou University, Guiyang 550025, China
| | - Changmei Wu
- Department of Polymer Materials and Engineering, College of Materials and Metallurgy, Guizhou University, Guiyang 550025, China; (Z.J.); (X.M.); (C.W.); (L.Z.)
- State Key Laboratory of Public Big Data, Guizhou University, Guiyang 550025, China
| | - Lingjun Zeng
- Department of Polymer Materials and Engineering, College of Materials and Metallurgy, Guizhou University, Guiyang 550025, China; (Z.J.); (X.M.); (C.W.); (L.Z.)
- State Key Laboratory of Public Big Data, Guizhou University, Guiyang 550025, China
| | - Lan Xie
- Department of Polymer Materials and Engineering, College of Materials and Metallurgy, Guizhou University, Guiyang 550025, China; (Z.J.); (X.M.); (C.W.); (L.Z.)
- State Key Laboratory of Public Big Data, Guizhou University, Guiyang 550025, China
- National Engineering Research Center for Compounding and Modification of Polymer Materials, National and Local Joint Engineering Research Center for Functional Polymer Membrane Materials and Membrane Processes, Guiyang 550014, China
| | - Qiang Zheng
- Department of Polymer Science and Engineering, Zhejiang University, Hangzhou 310027, China;
| |
Collapse
|
|
3
|
Shi L, Deng Q, Guo alidation L, Du Y, Du D, Zhang TC. Efficient removal of Cd(II), Cu(II), and Pb(II) in aqueous solutions by exhausted copper slag supported sulfidized nanoscale zerovalent iron. Sep Purif Technol 2023. [DOI: 10.1016/j.seppur.2023.123483] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 03/06/2023]
|