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Du Y, Huang Y, Wang W, Su S, Yang S, Sun H, Liu B, Han G. Application and development of foam extraction technology in wastewater treatment: A review. THE SCIENCE OF THE TOTAL ENVIRONMENT 2024; 930:172755. [PMID: 38670372 DOI: 10.1016/j.scitotenv.2024.172755] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/21/2024] [Revised: 04/17/2024] [Accepted: 04/23/2024] [Indexed: 04/28/2024]
Abstract
With the advancement of technology, wastewater treatment has become a significant challenge limiting the clean and sustainable development of chemical and metallurgical industries. Foam extraction, based on interfacial separation and mineral flotation, has garnered considerable attention as a wastewater treatment technology due to its unique physicochemical properties. Although considerable excellent accomplishments were reported, there still lacks a comprehensive summary of process features and contaminant removal mechanisms via foam extraction. According to the latest research progresses, the principles and characteristics of foam extraction technology, the classification and application of flotation reagents are systematically summarized in this work. Then comprehensively commented on the application fields and prospects of iterative flotation technology such as ion flotation, adsorption flotation and floating-extraction. The shortcomings and limitations of the current foam extraction technologies were discussed, and the feasible process intensification techniques were highlighted. This review aims to enchance the understanding of the foam extraction mechanism, and provides guidance for the selection appropriate reagents and foam extraction technologies in wastewater treatment.
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Affiliation(s)
- Yifan Du
- School of Chemical Engineering, Zhengzhou University, Zhengzhou 450001, Henan, PR China
| | - Yanfang Huang
- School of Chemical Engineering, Zhengzhou University, Zhengzhou 450001, Henan, PR China; Henan Critical Metals Institue, Zhengzhou University, Zhengzhou 450001, Henan, PR China; Zhongyuan Critical Metals Laboratory, Zhengzhou 450001, Henan, PR China
| | - Wenjuan Wang
- School of Chemical Engineering, Zhengzhou University, Zhengzhou 450001, Henan, PR China
| | - Shengpeng Su
- School of Chemical Engineering, Zhengzhou University, Zhengzhou 450001, Henan, PR China
| | - Shuzhen Yang
- School of Chemical Engineering, Zhengzhou University, Zhengzhou 450001, Henan, PR China; Henan Critical Metals Institue, Zhengzhou University, Zhengzhou 450001, Henan, PR China; Zhongyuan Critical Metals Laboratory, Zhengzhou 450001, Henan, PR China
| | - Hu Sun
- School of Chemical Engineering, Zhengzhou University, Zhengzhou 450001, Henan, PR China; Henan Critical Metals Institue, Zhengzhou University, Zhengzhou 450001, Henan, PR China; Zhongyuan Critical Metals Laboratory, Zhengzhou 450001, Henan, PR China
| | - Bingbing Liu
- School of Chemical Engineering, Zhengzhou University, Zhengzhou 450001, Henan, PR China; Henan Critical Metals Institue, Zhengzhou University, Zhengzhou 450001, Henan, PR China; Zhongyuan Critical Metals Laboratory, Zhengzhou 450001, Henan, PR China.
| | - Guihong Han
- School of Chemical Engineering, Zhengzhou University, Zhengzhou 450001, Henan, PR China; Henan Critical Metals Institue, Zhengzhou University, Zhengzhou 450001, Henan, PR China; Zhongyuan Critical Metals Laboratory, Zhengzhou 450001, Henan, PR China.
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Huang Z, Wang H. Study on the impact of photoaging on the generation of very small microplastics (MPs) and nanoplastics (NPs) and the wettability of plastic surface. ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH INTERNATIONAL 2023; 30:92963-92982. [PMID: 37501030 DOI: 10.1007/s11356-023-29012-8] [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: 05/03/2023] [Accepted: 07/24/2023] [Indexed: 07/29/2023]
Abstract
Photoaging is one of the important reasons for the sharp increase of waste plastics, especially microplastics (MPs), in the environment. Therefore, studying the photoaging of plastics is of great significance for controlling plastic pollution from the source. Nevertheless, there are few studies on plastic photoaging from the perspective of polymer structure. Besides, the capacity of different types of plastics to generate MPs with small particle size is relatively little studied. In view of this, we conducted a preliminary study on the capacity of different types of plastics to generate MPs using flow cytometry. We also studied the impact of photoaging on different types of plastics. The results showed that flow cytometry can be used to quantify very small MPs (1-50 μm) and nanoplastics (NPs) (< 1 μm). Furthermore, photoaging often accelerates the generation of MPs and roughens plastic surface. Besides, photoaging can introduce some oxygen-containing groups onto plastic surface, thereby changing the wettability of plastic surface. Moreover, benzene rings in polymer structures may inhibit the generation of MPs but may promote the transformation of the plastic surface from hydrophobic to hydrophilic during photoaging. Although the changes in properties of plastics caused by photoaging have adverse effects on the environment, some new processes and materials still can be developed based on photoaging of plastics. This work contributes to a better understanding of the photoaging of plastics from the perspective of polymer structure, which has certain positive significance for controlling plastic pollution from the source.
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Affiliation(s)
- Zike Huang
- Department of Chemical Engineering, College of Chemistry and Chemical Engineering, Central South University, Changsha, 410083, People's Republic of China
| | - Hui Wang
- Department of Chemical Engineering, College of Chemistry and Chemical Engineering, Central South University, Changsha, 410083, People's Republic of China.
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Meng X, Li Y, AlMasoud N, Wang W, Alomar TS, Li J, Ye X, Algadi H, Seok I, Li H, Xu BB, Lu N, El-Bahy ZM, Guo Z. Compatibilizing and toughening blends of recycled acrylonitrile-butadiene-styrene/recycled high impact polystyrene blends via styrene-butadiene-glycidyl methacrylate terpolymer. POLYMER 2023. [DOI: 10.1016/j.polymer.2023.125856] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 03/09/2023]
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