Article
Engineering, Chemical
Ming Cao, Fan Xiao, Zijian Yang, Yingbo Chen, Ligang Lin
Summary: This research combines electrospinning and electrospraying technology to construct a Polytetrafluoroethylene (PTFE) nanofiber membrane (NFM) for efficient oily wastewater treatment. The membrane shows excellent separation performance for oil-water mixtures and surfactant-stabilized emulsions. These NFMs have the potential to be applied in low-pressure driven membrane separation systems for preliminary separation of different types of oily wastewater.
SEPARATION AND PURIFICATION TECHNOLOGY
(2022)
Article
Polymer Science
Yang Yang, Sheng Han, Jincan Yan
Summary: In this study, demulsification and membrane separation technologies were combined to design a PVDF membrane with demulsification function. The modified membrane showed high separation efficiency and good anti-pollution performance, and the demulsification mechanism was analyzed.
JOURNAL OF APPLIED POLYMER SCIENCE
(2022)
Article
Engineering, Multidisciplinary
Jiahui Gu, Zhou Qu, Xiangning Zhang, Hongwei Fan, Chunxi Li, Juergen Caro, Hong Meng
Summary: Achieving a water-oil interface imbalance is important for the demulsification of water-in-oil emulsions. Conventional demulsifying membranes break the interface balance using high transmembrane pressure. This study presents a contact demulsification concept using a novel demulsifying membrane with a superhydrophobic surface. The membrane shows excellent separation efficiency and high flux even for nanoscale water-in-toluene emulsions. This concept paves the way for developing next-generation demulsifying membranes for water-in-oil emulsion separation.
Article
Materials Science, Ceramics
Billel Salhi, Nadeem Baig, Ismail Abdulazeez, Amir Al-Ahmed, Isam H. Aljundi
Summary: This study presents a facile method for fabricating high flux polyaniline-modified ceramic membranes for the separation of emulsified oil. The modified membranes exhibit superhydrophilic/superoleophobic properties and show stable oil rejection flux.
CERAMICS INTERNATIONAL
(2022)
Article
Engineering, Chemical
Jialu Zhang, Xiangfeng Huang, Yongjiao Xiong, Weiwei Zheng, Wanqi Liu, Mengfan He, Lexue Li, Jia Liu, Lijun Lu, Kaiming Peng
Summary: The study utilized bioinspired spider silk to construct a novel superhydrophilic electrospun nanofibrous membrane for highly efficient separation of nanoemulsions, achieving both high oil rejection and high permeate flux. The directional migration and coalescence of nano-sized oil droplets on spindle-knotted structures driven by Laplace force and the rejection of large oil droplets by the superhydrophilic nanofibrous membrane with negligible fouling were crucial in achieving the breakthrough results.
SEPARATION AND PURIFICATION TECHNOLOGY
(2022)
Article
Environmental Sciences
Saiguo Yang, Jingqiu Sun, Kun Wu, Chengzhi Hu
Summary: Electrocoagulation is an efficient technology for removing oil-in-water emulsions, with higher electric field intensity aiding in oil removal and accelerating the aggregation of oil droplets. Increasing current density in EC processes results in higher Al3+ dosage and larger electric field intensity, which is conducive to oil droplet demulsification. These findings provide insight and a theoretical basis for improving oil removal by EC processes.
Review
Chemistry, Multidisciplinary
Jiacheng Yu, Changqian Cao, Yongxin Pan
Summary: The challenges of efficiently separating highly viscous crude oil/water mixtures due to offshore crude oil exploitation, marine transportation, and oil recovery are discussed. Adsorption and filtration techniques are considered powerful and renewable approaches, with advancements in materials for improved separation performance highlighted. The review covers background information, wetting theories, state-of-the-art materials, separation mechanisms, and challenges in viscous crude oil/water separation.
ADVANCED MATERIALS INTERFACES
(2021)
Article
Engineering, Environmental
Yang Zhao, Yuna Gu, Guandao Gao
Summary: In this study, a piezoelectric ceramic membrane (PCM) was used to transform hydraulic pressure pulses into electroactive responses, enabling in situ demulsification and oil/water separation. The PCM generated rapid voltage oscillations and high electric field intensity, facilitating electrocoalescence and continuous membrane demulsification. This environmentally friendly and energy-saving membrane technology provides a new opportunity for practical applications in wastewater treatment.
Article
Chemistry, Physical
Jiayan Zhang, Xin Lei, Xinping Yu, Ruochen Fang
Summary: By developing a special wettable cotton fabric with demulsification ability, the P-GMA/SiO2/OA cotton showed high tensile strength and exceptional resistance to both chemical corrosion and self-cleaning ability. It can efficiently separate various emulsified oil mixtures under actual operating conditions.
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
(2023)
Article
Chemistry, Multidisciplinary
Sonia Mir, Saeed Kooshki
Summary: The field of plasma-liquid interactions is rapidly growing, but there is a notable gap in the study of plasma-emulsion interactions. This study introduces a groundbreaking approach utilizing the fountain dielectric barrier discharge (FDBD) plasma reactor to investigate the effects of plasma on emulsions. The results show that short-term plasma treatment can effectively separate emulsified water, while prolonged exposure to plasma leads to stable emulsion formation.
Article
Chemistry, Physical
Dongdong Gao, Fang Cheng, Yong Wang, Chunmei Li, Eva Murong Yang, Chao Li, Lijun Zhang, Gang Cheng
Summary: In this study, a superhydrophobic sponge (MS-EP-APT) was developed using asphaltene (APT), melamine sponges (MS) and polyethyleneimine (PEI) for demulsification and water-oil mixture separation. The sponge exhibited high separation efficiency for immiscible oil/water mixtures, surfactant stabilized water-in-oil (W/O) emulsions, and anionic surfactant-stabilized oil-in-water (O/W) emulsions. It also demonstrated good reusability and salt tolerance even in seawater, making it a promising candidate for green manufacturing and engineering in resource recovery and environmental remediation.
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
(2023)
Article
Engineering, Chemical
Zhan Gao, Xia Gu, Caini Liu, Zilai Zhang, Huaiqi Shao, Qingbo Zhang, Mingce Long, Xiaoyan Guo
Summary: In this study, a superoleophilic membrane-magnetic particles coupling system driven by internal electrostatic force was demonstrated, enabling the super efficient separation of water-in-oil emulsions and overcoming membrane fouling. Magnetic nanoparticles with superoleophilic behaviors and electrostatic repulsion forces played a crucial role in the separation process. Furthermore, the incorporation of magnetic nanoparticles into the membrane increased roughness and superoleophilic ability, leading to improved separation capacity.
JOURNAL OF MEMBRANE SCIENCE
(2022)
Article
Nanoscience & Nanotechnology
Yajie Ding, Bihan Hu, Liwei Zhuang, Jianqiang Wang, Jindan Wu, Fu Liu, Jiping Wang
Summary: The developed PVDF membrane compensated with PHEMA and PDMS achieved long-lasting and efficient separation for viscous emulsions through chemical coordination phase separation, showing excellent fouling resistance and release properties.
ACS APPLIED MATERIALS & INTERFACES
(2021)
Article
Engineering, Chemical
Xu Zhu, Lei Zhu, Hui Li, Chunyu Zhang, Jinwei Xue, Ran Wang, Xurong Qiao, Qingzhong Xue
Summary: The PVA hydrogel nanofibrous membrane achieves sustained separation capability in oil-water emulsion separation through the SCD method, indicating great potential for practical applications.
JOURNAL OF MEMBRANE SCIENCE
(2021)
Article
Green & Sustainable Science & Technology
Haoze Wang, Jiefeng Meng, Feng Li, Taohai Li
Summary: In this study, graphitic carbon nitride/metal-organic framework material was synthesized through a simple hydrothermal method, and cotton was modified using a simple soaking method to prepare superhydrophobic cotton with photocatalytic ability. The modified cotton exhibited an excellent superhydrophobic angle and could sorb oil more than 10 times its own mass. The cotton material could achieve oil-water separation in various conditions and was able to separate micro-nano-scale water droplets from water-in-oil emulsions. Additionally, the cotton showed high efficiency in the degradation of Eriochrome Black T under light irradiation.
JOURNAL OF CLEANER PRODUCTION
(2023)
