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An BH, Xu DM, Wang RT, Wen YX, Geng R, Wu JY, Tang XC, Chen HB. The simultaneous removal of methylene blue (MB) and Ca 2+ by recyclable adsorbents based the scales derived from coal gasification system. ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH INTERNATIONAL 2024; 31:32519-32537. [PMID: 38658508 DOI: 10.1007/s11356-024-33240-x] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/28/2023] [Accepted: 04/03/2024] [Indexed: 04/26/2024]
Abstract
The transformation of solid wastes from industrial production into effective adsorbents could significantly contribute to wastewater treatment. In this study, after acidizing and burning soft scale (SS) from coal gasification system, two magnetic adsorbents (mag-ASS and mag-BASS) were prepared via the combination of magnetite with ultrasonic, respectively. The treatment effects of mag-ASS and mag-BASS were then investigated for simulated wastewater containing macromolecular organic matter [i.e., methylene blue (MB)] and Ca2+. The results indicated that the pseudo second order kinetic, Elovich, Freundlich, Langmuir and Temkin model could well describe the adsorption behavior of MB and Ca2+ onto mag-ASS and mag-BASS. The maximum adsorption capacities of mag-ASS for MB and mag-BASS for Ca2+ were 600.53 mg/g and 102.54 mg/g, respectively. Surprisingly, the adsorption abilities of mag-ASS for MB and mag-BASS for Ca2+ show significantly higher than the others. The adsorption mechanisms of MB mainly included electrostatic interaction, π-π conjugate interaction and cation exchange, while those of Ca2+ were mainly electrostatic interaction and cation exchange. The diffusion of MB and Ca2+ onto the magnetic adsorbents might be controlled by the combined effects of intraparticle and liquid film diffusion. There was no significant reduction in adsorption capacity after 8 cycles of adsorption and desorption, indicating that SS-based magnetic adsorbents had good recyclability and stability. Moreover, the removal efficiency of mag-BASS for total hardness and total organic carbon in real coal gasification gray water (CGGW) was 82.60 and 64.10%, respectively. The treatment of CGGW and the resource of wastes would significantly promote the reasonable disposal of coal gasification scales.
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Affiliation(s)
- Bai-Hong An
- State Key Laboratory of Pollution Control and Resource Reuse, College of Environmental Science and Engineering, Tongji University, Shanghai, 200092, China
- National Engineering Research Center for Urban Pollution Control, Tongji University, Shanghai, 200092, China
| | - Da-Mao Xu
- State Key Laboratory of Pollution Control and Resource Reuse, College of Environmental Science and Engineering, Tongji University, Shanghai, 200092, China
- National Engineering Research Center for Urban Pollution Control, Tongji University, Shanghai, 200092, China
| | - Run-Ting Wang
- Department of Materials Science, Fudan University, Shanghai, 200433, China
| | - Ye-Xuan Wen
- State Key Laboratory of Pollution Control and Resource Reuse, College of Environmental Science and Engineering, Tongji University, Shanghai, 200092, China
- National Engineering Research Center for Urban Pollution Control, Tongji University, Shanghai, 200092, China
| | - Rui Geng
- State Key Laboratory of Pollution Control and Resource Reuse, College of Environmental Science and Engineering, Tongji University, Shanghai, 200092, China
- National Engineering Research Center for Urban Pollution Control, Tongji University, Shanghai, 200092, China
| | - Jia-Yun Wu
- Sinopec Ningbo Engineering Co., LTD, Ningbo, 315103, China
| | - Xian-Chun Tang
- State Key Laboratory of Pollution Control and Resource Reuse, College of Environmental Science and Engineering, Tongji University, Shanghai, 200092, China
| | - Hong-Bin Chen
- State Key Laboratory of Pollution Control and Resource Reuse, College of Environmental Science and Engineering, Tongji University, Shanghai, 200092, China.
- National Engineering Research Center for Urban Pollution Control, Tongji University, Shanghai, 200092, China.
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Guo F, Guo Y, Chen L, Jia W, Zhu Y, Li Y, Wang H, Yao X, Zhang Y, Wu J. Multitudinous components recovery, heavy metals evolution and environmental impact of coal gasification slag: A review. CHEMOSPHERE 2023; 338:139473. [PMID: 37451637 DOI: 10.1016/j.chemosphere.2023.139473] [Citation(s) in RCA: 4] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/23/2023] [Revised: 06/27/2023] [Accepted: 07/10/2023] [Indexed: 07/18/2023]
Abstract
In recent years, the coal gasification industry has rapidly developed, becoming one of the most promising technologies in the advanced and clean coal chemical industry. As a result, the annual emission of coal gasification fine slag (CGFS) has continuously increased. The present situation of CGFS is regarded as a notorious waste in gasification plants and is rudely landfilled or deposited in slag yards, which leads to a large waste of land resources, the release of dangerous elements, and numerous pollution problems. Although CGFS is classified as industrial solid waste, its unique physical and chemical properties make it a valuable resource that cannot be overlooked. This paper focuses on the resource utilization technology and environmental impact of CGFS. The resource utilization of different components of CGFS has realized the evolution from waste to valuable substances. Moreover, during the disposal and utilization of CGFS, its environmental effects cannot be ignored. The main problems and future research directions are also further proposed. Efforts should be focused on the challenges of the technology, cost, and environmental protection in the application process to achieve industrial application, and ultimately committed to sustainable and green development goals, and promote the sustainable management and conservation of resources.
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Affiliation(s)
- Fanhui Guo
- School of Chemical Engineering and Technology, China University of Mining and Technology, Xuzhou, 221116, Jiangsu, China; National Engineering Research Center of Coal Preparation and Purification, China University of Mining and Technology, Xuzhou, 221116, Jiangsu, China.
| | - Yang Guo
- School of Chemical Engineering and Technology, China University of Mining and Technology, Xuzhou, 221116, Jiangsu, China; National Engineering Research Center of Coal Preparation and Purification, China University of Mining and Technology, Xuzhou, 221116, Jiangsu, China.
| | - Liqing Chen
- School of Chemical Engineering and Technology, China University of Mining and Technology, Xuzhou, 221116, Jiangsu, China; National Engineering Research Center of Coal Preparation and Purification, China University of Mining and Technology, Xuzhou, 221116, Jiangsu, China.
| | - Wenke Jia
- School of Chemical Engineering and Technology, China University of Mining and Technology, Xuzhou, 221116, Jiangsu, China; National Engineering Research Center of Coal Preparation and Purification, China University of Mining and Technology, Xuzhou, 221116, Jiangsu, China.
| | - Yingkun Zhu
- School of Chemical Engineering and Technology, China University of Mining and Technology, Xuzhou, 221116, Jiangsu, China; National Engineering Research Center of Coal Preparation and Purification, China University of Mining and Technology, Xuzhou, 221116, Jiangsu, China.
| | - Yan Li
- School of Chemical Engineering and Technology, China University of Mining and Technology, Xuzhou, 221116, Jiangsu, China; National Engineering Research Center of Coal Preparation and Purification, China University of Mining and Technology, Xuzhou, 221116, Jiangsu, China.
| | - Hongguan Wang
- School of Chemical Engineering and Technology, China University of Mining and Technology, Xuzhou, 221116, Jiangsu, China; National Engineering Research Center of Coal Preparation and Purification, China University of Mining and Technology, Xuzhou, 221116, Jiangsu, China.
| | - Xuehui Yao
- School of Chemical Engineering and Technology, China University of Mining and Technology, Xuzhou, 221116, Jiangsu, China; National Engineering Research Center of Coal Preparation and Purification, China University of Mining and Technology, Xuzhou, 221116, Jiangsu, China.
| | - Yixin Zhang
- School of Chemical Engineering and Technology, China University of Mining and Technology, Xuzhou, 221116, Jiangsu, China; National Engineering Research Center of Coal Preparation and Purification, China University of Mining and Technology, Xuzhou, 221116, Jiangsu, China.
| | - Jianjun Wu
- School of Chemical Engineering and Technology, China University of Mining and Technology, Xuzhou, 221116, Jiangsu, China; National Engineering Research Center of Coal Preparation and Purification, China University of Mining and Technology, Xuzhou, 221116, Jiangsu, China.
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Mesoporous Spherical Silica Filler Prepared from Coal Gasification Fine Slag for Styrene Butadiene Rubber Reinforcement and Promoting Vulcanization. Polymers (Basel) 2022; 14:polym14204427. [PMID: 36298005 PMCID: PMC9608839 DOI: 10.3390/polym14204427] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/01/2022] [Revised: 10/14/2022] [Accepted: 10/17/2022] [Indexed: 11/25/2022] Open
Abstract
Coal gasification fine slag (CFS) is a solid contaminant produced by an entrained flow gasifier, which pollutes fields and the air in the long term. CFS is a potential polymer reinforcement filler and has been used in polypropylene and acrylonitrile butadiene styrene resins. Coal gasification fine slag mesoporous silica (FS-SiO2) was prepared by acid leaching, calcination, and pH adjustment, with a larger specific surface area and less surface hydroxyl compared to the commercial precipitated silica (P-silica). The cure characteristics, crosslink density, mechanical properties, the morphology of the tensile fractures, dynamic mechanics, and rubber processing of the prepared styrene butadiene rubber (SBR) composites filled with P-silica and FS-SiO2 were analyzed, respectively. The results indicated that FS-SiO2 was dispersed more uniformly in the SBR matrix than P-silica owing to its smaller amount of surface hydroxyl and spherical structure, resulting in a better mechanical performance and wet skid resistance. In particular, the SBR composites with a filler pH of 6.3 exhibited the highest crosslink density and tensile strength, being superior to commercial P-silica. Significantly, the curing time decreased with the increase in the pH of FS-SiO2, which caused the rubber processing to be more efficient. This strategy can reduce the cost of rubber composites and the environmental pollution caused by CFS.
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