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Journal of Dispersion Science and Technology Volume 44, 2023 - Issue 4
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Research Article

The demulsification of oily wastewater by a hyperbranched polymer grafted SiO2

Yu Zhanga School of Chemistry & Environmental Engineering, Hubei Minzu University, Enshi, P.R. ChinaCorrespondence[email protected]
,
Jiazhe Kuangb School of Chemistry & Environmental Engineering, Yangtze University, Jingzhou, P.R. China
,
Bin Lic Xinjiang Tarim Oilfield Construction Engineering Co., Ltd, PetroChina Tarim Oilfield Company, Korla, P.R. China
,
Yuanzhu Mib School of Chemistry & Environmental Engineering, Yangtze University, Jingzhou, P.R. China
,
Ying Yangb School of Chemistry & Environmental Engineering, Yangtze University, Jingzhou, P.R. China
&
Xuening Fengb School of Chemistry & Environmental Engineering, Yangtze University, Jingzhou, P.R. China
Pages 651-659 | Received 03 Feb 2021, Accepted 21 Jul 2021, Published online: 14 Aug 2021
 
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Abstract

In this work, a PAMAM@SiO2 demulsifier was synthesized by the reaction of a hyperbranched poly (amido amine) (PAMAM) and KH570 modified SiO2. The structure, morphology and composition of PAMAM@SiO2 were characterized by FT-IR, SEM and EDS. The effect of the concentration of PAMAM@SiO2, salinity and temperature on the demulsification performance was systematically studied. The results showed that the transmittance of aqueous phase after demulsification could reach as high as 92.1% at optimal conditions, and corresponding oil removal rate was 99.53%. Interfacial activity, three-phase contact angle, self-assembly of interfacial film and dynamic interfacial tension were investigated to explore the demulsification mechanism. Also, the aggregation process of oil droplets in emulsion was observed with a microscope. It indicates that the PAMAM@SiO2 demulsifier has a potential application in the treatment process of oily wastewater.

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