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Cui K, Han X, Zhou P, Hao M, Wang X, Bian L, Nie J, Yang G, Liang J, Liu X, Wang F. A novel highly dispersed calcium silicate hydrate nanosheets for efficient high-concentration Cu 2+ adsorption. JOURNAL OF HAZARDOUS MATERIALS 2024; 475:134774. [PMID: 38870850 DOI: 10.1016/j.jhazmat.2024.134774] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/24/2024] [Revised: 05/15/2024] [Accepted: 05/29/2024] [Indexed: 06/15/2024]
Abstract
Currently, the low cost and effective purification toward heavy metal ions in wastewater has garnered global attention. Herein, we used hydrothermal method to prepare highly dispersed calcium silicate hydrate in fluorite tailings. And the stacking thickness of calcium silicate hydrate layered morphology was less than 5 nm. For high concentration Cu2+ purification investigation in wastewater, we found that the equilibrium adsorption capacity reached 797.92 mg/g via the CSH with 3:2 Ca/Si molar ratio, be 1.43-21.8 times than that of reported data. Therein, the metal-metal exchange and deposition are the primary pathways for Cu2+ adsorption, and electrostatic attraction is the secondary pathway. And the relative ∼100 % removal rate of high-concentration Ni2+ and Cr3+ ions were confirmed via CSH prepared from different tailings. This method offers a cost-effective way to utilize tailings for preparing highly efficient adsorbents toward HMIs removal in wastewater.
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Affiliation(s)
- Kaibin Cui
- Key Laboratory of Special Functional Materials for Ecological Environment and Information (Hebei University of Technology), Ministry of Education, Tianjin 300130, China; Institute of Power Source and Ecomaterials Science, Hebei University of Technology, Tianjin 300130, China
| | - Xiaoyu Han
- Key Laboratory of Special Functional Materials for Ecological Environment and Information (Hebei University of Technology), Ministry of Education, Tianjin 300130, China; Institute of Power Source and Ecomaterials Science, Hebei University of Technology, Tianjin 300130, China
| | - Pengfei Zhou
- Key Laboratory of Special Functional Materials for Ecological Environment and Information (Hebei University of Technology), Ministry of Education, Tianjin 300130, China; Institute of Power Source and Ecomaterials Science, Hebei University of Technology, Tianjin 300130, China
| | - Ming Hao
- Key Laboratory of Special Functional Materials for Ecological Environment and Information (Hebei University of Technology), Ministry of Education, Tianjin 300130, China; Institute of Power Source and Ecomaterials Science, Hebei University of Technology, Tianjin 300130, China
| | - Xianku Wang
- Key Laboratory of Special Functional Materials for Ecological Environment and Information (Hebei University of Technology), Ministry of Education, Tianjin 300130, China; Institute of Power Source and Ecomaterials Science, Hebei University of Technology, Tianjin 300130, China
| | - Liang Bian
- Key Laboratory of Solid Waste Treatment and Resource Recycle, State Key Laboratory of Environment-friendly Energy Materials, Tianfu Institute of Research and Innovation, School of Environment and Resource, Southwest University of Science and Technology, Mianyang 621010, Sichuan, China.
| | - Jianan Nie
- Key Laboratory of Solid Waste Treatment and Resource Recycle, State Key Laboratory of Environment-friendly Energy Materials, Tianfu Institute of Research and Innovation, School of Environment and Resource, Southwest University of Science and Technology, Mianyang 621010, Sichuan, China
| | - Guanling Yang
- Key Laboratory of Special Functional Materials for Ecological Environment and Information (Hebei University of Technology), Ministry of Education, Tianjin 300130, China; Institute of Power Source and Ecomaterials Science, Hebei University of Technology, Tianjin 300130, China
| | - Jinsheng Liang
- Key Laboratory of Special Functional Materials for Ecological Environment and Information (Hebei University of Technology), Ministry of Education, Tianjin 300130, China; Institute of Power Source and Ecomaterials Science, Hebei University of Technology, Tianjin 300130, China
| | - Xinnan Liu
- Key Laboratory of Solid Waste Treatment and Resource Recycle, State Key Laboratory of Environment-friendly Energy Materials, Tianfu Institute of Research and Innovation, School of Environment and Resource, Southwest University of Science and Technology, Mianyang 621010, Sichuan, China
| | - Fei Wang
- Key Laboratory of Special Functional Materials for Ecological Environment and Information (Hebei University of Technology), Ministry of Education, Tianjin 300130, China; Institute of Power Source and Ecomaterials Science, Hebei University of Technology, Tianjin 300130, China.
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The Influence of Slag/Fly Ash Ratio and Sodium Silicate Modulus on the Properties of 1-3-2 Alkali-Based Piezoelectric Composite. MATERIALS 2022; 15:ma15031150. [PMID: 35161094 PMCID: PMC8840355 DOI: 10.3390/ma15031150] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 01/01/2022] [Revised: 01/28/2022] [Accepted: 01/28/2022] [Indexed: 02/04/2023]
Abstract
In this paper, a comprehensive experimental investigation on the effect of the slag-to-fly ash ratio (hereafter referred to as SL/FA) and sodium silicate modulus on the properties of a 1-3-2 piezoelectric composite was carried out. The influence of the SL/FA ratio on various properties was initially investigated. Compared with other specimens, specimens with SL/FA = 40%:60% had the highest electromechanical coupling coefficient (Kt = 77.67%, Kp = 71%). Therefore, the specimen with SL/FA = 40%:60% was chosen to explore the effect of the sodium silicate modulus. Additionally, the specimen with SL/FA = 40%:60% and a sodium silicate modulus of 1.3 had the best electromechanical conversion efficiency with Kt = 75.68% and Kp = 75.95%. The 1-3-2 alkali-based piezoelectric composite proved to have the characteristics of a low cost, optimal piezoelectric and mechanical properties, higher tunability, and better compatibility with concrete. It is a potential alternative to cement-based piezoelectric composites and may be widely utilized to monitor the health of concrete structures.
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