Abstract
Herein, an enhanced coagulation model is proposed in which zeolite is used as a crystal nucleus to promote flocs. The zeolite is prepared from fly ash by microwave-assisted hydrothermal synthesis. Scanning electron microscopy (SEM), X-ray diffraction (XRD), and specific surface area and pore size analysis (BET) characterization confirmed the successful synthesis of ZFA, and improved the surface properties. Thus, the adsorption capacity of ZFA as crystal nucleus was improved, which enabled it to achieve better results in the process of enhanced coagulation. Compared with those of conventional coagulation, the oil content and SS removal rate of ZFA-enhanced coagulation increased by 85% and 44%, respectively. Compared with that of CFA-enhanced coagulation, the oil removal efficiency increased by 4%, and the SS removal efficiency increased by 9%. The optimal conditions of ZFA-enhanced coagulation were as follows: ZFA dosage of 100 mg/L, pH value of 5–8, ZFA particle size range of 60–75 μm, temperature of 40–50 ℃, and precipitation time of 30 min.
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The datasets used and/or analyzed during the current study are available from the corresponding author on reasonable request.
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This study was supported by the Northeast Petroleum University Youth Science Fund Project (2019QNL-30).
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All authors contributed to the study conception and design. Material preparation was performed by [Zhongchen Yu], [Ziliang Zhang] and [Zhonghua Dai]. Data collection and analysis were performed by [Hongmei Cui] and [Xing Huang]. The first draft of the manuscript was written by [Ling Yin] and [Xing Huang] and critical revision of the article was written by [Hongmei Cui]. All authors commented on previous versions of the manuscript. All authors read and approved the final manuscript.
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Cui, H., Yin, L., Huang, X. et al. Zeolite fly ash-enhanced coagulation treatment of oil recovery wastewater from polymer flooding. Environ Sci Pollut Res 29, 90318–90327 (2022). https://doi.org/10.1007/s11356-022-22035-7
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DOI: https://doi.org/10.1007/s11356-022-22035-7