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Zhang Y, Li M, Huang W, Fan K, Li J, Zhong M, Li Z, Li C, Zhang Q. Research on modified blast furnace dust in demulsification: The synergistic effect of ferric oxide, hydrophobic carbon, and polysilicate. JOURNAL OF THE AIR & WASTE MANAGEMENT ASSOCIATION (1995) 2022; 72:403-419. [PMID: 35113008 DOI: 10.1080/10962247.2022.2032480] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/26/2021] [Revised: 12/30/2021] [Accepted: 01/05/2022] [Indexed: 06/14/2023]
Abstract
Current treatment processes for the cold rolling emulsion wastewater were in the dilemma that the cost was so high while the efficiency was not satisfied in China. In this work, a novel material with high-performance demulsification was obtained and used to treat the emulsion wastewater efficiently by modifying blast furnace dust (BFD), a steel industry waste. Firstly, the BFD was characterized by various analytical techniques and the results suggested that hydrophobic functional groups, positively charged iron oxide, and polysilicon in the BFD were contributed to removing stable oil droplets. Therefore, the BFD modification was conducted accordingly by optimizing the proportion and reaction conditions of these three components. The study demonstrated that the removal rate of oil and CODcr reached 75.21% and 81.23% under the conditions of the carbon type of GWF-HAC-R90, the carbon content of 14.86%, and the n(Fe)/n(Si) of 1.55, respectively. Based on this, the effects of pH, demulsifier dosage, and average agitation rate were investigated. The emulsion components before and after demulsification were analyzed by GC-MS, and the demulsification mechanism was expounded combined with kinetics. Results showed that the Fe2O3 with positive charge played a dominant role in emulsions with mainly anionic surfactants, while hydrophobic carbon structures and polysilicate acted as the auxiliaries. Besides, comprehensive analysis and characterization results suggested that the demulsification effect was a combination of the synergic processes: 1) electrostatic interaction developed by the anionic surfactant oil droplets and the positively charged the BFD particles; 2) hydrophobic association among the oil droplet with nonionic surfactant and amphiphilic carbon-iron complexes; 3) adsorption bridging between the surfactant oil droplets and polysilicate. The results of comparative tests in treating the actual cold-rolling emulsion wastewater showed the MBFD could bring about significant technical, economic benefits and achieve utilization of metallurgical solid wastes.Implications: Blast furnace dust (BFD) is an industrial solid waste obtained by dry de-dusting from blast furnace gas during the blast furnace ironmaking process. The main components of BFD are iron oxide and carbon, and also contain small amounts of different recoverable non-ferrous metals zinc, secret, indium and lead, which have recovery value. In this study, we enhanced the three parts of BFD and used to demulsification. In this study, the BFD was modified in three aspects (hydrophobic functional groups, positively charged iron oxide, and polysilicon) to achieve the secondary utilization of waste in emulsion wastewater treatment. And investigated the effect of reaction conditions on the demulsification effect with modified blast furnace dust (MBFD). Furthermore, the GC-MS analyzes combined with kinetics interpret the demulsification mechanism with the MBFD as a secondary resource. Finally, the comparative tests in treating the actual cold-rolling emulsion wastewater showed the MBFD could bring about significant technical and economic benefits and achieve utilization of metallurgical solid wastes.
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Affiliation(s)
- Yibo Zhang
- School of Civil Engineering and Architecture, Wuhan University of Technology, Wuhan, People's Republic of China
| | - Meng Li
- School of Civil Engineering and Architecture, Wuhan University of Technology, Wuhan, People's Republic of China
| | - Wansong Huang
- Hubei Jianke International Engineering Construction, Ltd., Wuhan, People's Republic of China
| | - Kun Fan
- School of Civil Engineering and Architecture, Wuhan University of Technology, Wuhan, People's Republic of China
| | - Jiawei Li
- School of Civil Engineering and Architecture, Wuhan University of Technology, Wuhan, People's Republic of China
| | - Min Zhong
- School of Civil Engineering and Architecture, Wuhan University of Technology, Wuhan, People's Republic of China
| | - Zefeng Li
- School of Civil Engineering and Architecture, Wuhan University of Technology, Wuhan, People's Republic of China
| | - Chengwei Li
- School of Civil Engineering and Architecture, Wuhan University of Technology, Wuhan, People's Republic of China
| | - Qian Zhang
- School of Civil Engineering and Architecture, Wuhan University of Technology, Wuhan, People's Republic of China
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Ren H, Hou D, Zhou S, Wang B, Yang D, Luo Z. Study on the Effect of Petroleum Components on the Elution of Oily Sludge by a Compound Biosurfactant. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2022; 38:2026-2037. [PMID: 35108021 DOI: 10.1021/acs.langmuir.1c02870] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/14/2023]
Abstract
Currently, research on oily sludge treatment mainly focuses on optimizing the deoiling effect and research on the deoiling mechanism, and the influence of petroleum components on the properties and treatment of oily sludge is rarely considered. Therefore, in this study, petroleum substances in three types of oil sludge were eluted using the biosurfactant cleaning technology, and the influence of petroleum components on the cleaning process was explored. The results showed that the biosurfactants rhamnolipid and sophorolipid had a synergistic effect, and the oil-removal rate was as high as 92.2% when the SL mass fraction was 0.4 in the compound biosurfactant. Three types of oily sludge, wellsite-landing sludge, pipeline-landing sludge, and tank-bottom sludge, were cleaned by the compound biosurfactant; the results showed that the residual petroleum substance in liquid and solid phases, the turbidity value, and the zeta-potential value of the supernatant of oil sludge samples after cleaning increased with the increase in the heavy components of the oily sludge, and the oil-removal rate decreased gradually. After cleaning, the average relative molecular weight of the three oil phases increased with the heavy components, which was increased by 1.83, 4.83, and 10.72%, respectively, and the increase in molecular weight increased the difficulty of cleaning. After cleaning, the retention time and peak intensity of the oil sample changed significantly, and it had a stronger elution effect on low-molecular-weight alkanes. It was found that the compound biosurfactant had a good elution effect on polycyclic aromatic hydrocarbons, but the increase in the content of heavy components and the increase in aromatic rings increased the difficulty of cleaning. Moreover, it was found that the compound biosurfactant could not completely elute the petroleum substances on the surface of solid particles, and the asphaltene components in the oil phase were more difficult to elute than other components.
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Affiliation(s)
- Hongyang Ren
- College of Chemistry and Chemical Engineering, Southwest Petroleum University, Chengdu 610500, China
- Key Laboratory of Shale Gas Exploration, Ministry of Natural Resources, Chongqing Institute of Geology and Mineral Resources, Chongqing 401120, China
- State Environmental Protection Key Laboratory of Collaborative Control and Remediation of Soil and Water Pollution, Chengdu 610059, China
| | - Diya Hou
- College of Chemistry and Chemical Engineering, Southwest Petroleum University, Chengdu 610500, China
| | - Shanyu Zhou
- College of Chemistry and Chemical Engineering, Southwest Petroleum University, Chengdu 610500, China
| | - Bing Wang
- College of Chemistry and Chemical Engineering, Southwest Petroleum University, Chengdu 610500, China
- Key Laboratory of Shale Gas Exploration, Ministry of Natural Resources, Chongqing Institute of Geology and Mineral Resources, Chongqing 401120, China
| | - Deming Yang
- Key Laboratory of Shale Gas Exploration, Ministry of Natural Resources, Chongqing Institute of Geology and Mineral Resources, Chongqing 401120, China
| | - Zhengyu Luo
- State Environmental Protection Key Laboratory of Collaborative Control and Remediation of Soil and Water Pollution, Chengdu 610059, China
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Lu Z, Liu W, Bao M, Zhao L, Sun X, Lu J, Li Y. Oil recovery from polymer-containing oil sludge in oilfield by thermochemical cleaning treatment. Colloids Surf A Physicochem Eng Asp 2021. [DOI: 10.1016/j.colsurfa.2020.125887] [Citation(s) in RCA: 10] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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Duan M, Wang X, Fang S, Zhao B, Li C, Xiong Y. Treatment of Daqing oily sludge by thermochemical cleaning method. Colloids Surf A Physicochem Eng Asp 2018. [DOI: 10.1016/j.colsurfa.2018.06.046] [Citation(s) in RCA: 37] [Impact Index Per Article: 6.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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Gao J, Jiang F, Zhai G. Ultra-High Molecular Weight Alpha-Amino Poly(Methyl Methacrylate) with High Tgthrough Emulsion Polymerization by Using Transition Metal Cation-Tertiary Amine Pairs as a Mono-Centered Initiator. MACROMOL REACT ENG 2016. [DOI: 10.1002/mren.201500067] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Affiliation(s)
- Jie Gao
- Department of Materials Chemistry; College of Science and Engineering; Changzhou University; Changzhou 213164 China
| | - Fengchi Jiang
- Department of Materials Chemistry; College of Science and Engineering; Changzhou University; Changzhou 213164 China
| | - Guangqun Zhai
- Department of Materials Chemistry; College of Science and Engineering; Changzhou University; Changzhou 213164 China
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Zhang Z, Wang G, Nie Y, Ji J. Hydrodynamic cavitation as an efficient method for the formation of sub-100 nm O/W emulsions with high stability. Chin J Chem Eng 2016. [DOI: 10.1016/j.cjche.2016.04.011] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
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