Article
Chemistry, Physical
Ji Yun Lee, Sang Ho Lee, Seon Ae Hwangbo, Tae Geol Lee
Summary: The use of gelling agents to prepare surfactant-free emulsions can enhance emulsion stability and has great potential for various applications.
Review
Energy & Fuels
Murtada Mohammed Abdulredha, Siti Aslina Hussain, Luqman Chuah Abdullah, Tee Lee Hong
Summary: This paper reviews the research on emulsion formation, stability, chemical demulsification, and other aspects related to emulsion thermodynamics. Water-in-oil emulsions are common in the petroleum industry, and their stability is attributed to natural surface-active compounds in crude oil. However, researchers in the oilfield need to explore different methods, with chemical methods being an important approach, to demulsify these emulsions.
JOURNAL OF PETROLEUM SCIENCE AND ENGINEERING
(2022)
Article
Environmental Sciences
Muhammad Irfan, Javed Akbar Khan, Hussain H. Al-Kayiem, Sharjeel Waqas, Waqas Aleem, Nor Erniza Mohammad Rozali, Sabih Qamar, Abdulnour Ali Jazem Ghanim, Dobrochna Ginter-Kramarczyk, Stanislaw Legutko, Izabela Kruszelnicka, Saifur Rahman
Summary: Water separation is a significant issue in production facilities due to the use of chemical enhanced oil recovery methods that suppress oil/water separation with stable emulsions. This study assessed the impact of different emulsifiers on enhanced oil recovery and used laser scattering to measure emulsion stability. The findings showed that increasing surfactant concentration stabilizes the emulsion, while increasing alkali and polymer concentrations destabilize it. The study also focused on carbon number distribution, wax appearance temperature, and wax content in crude oil samples from different field locations, revealing a correlation between high carbon distribution and wax content.
Article
Agriculture, Multidisciplinary
Xiao-Wei Chen, Qi-Hua Hu, Xiao-Xiao Li, Chuan-Guo Ma
Summary: This study investigated the effects of different emulsion types, oil compositions, and oil fractions on the structure and lipid oxidation in emulgel systems. It was found that emulgels were more susceptible to oxidation compared to soybean oil, with water-in-oil emulgels showing higher oxidation resistance than oil-in-water emulgels. Additionally, the degree of unsaturation in the oil composition and oil fraction had significant impacts on lipid oxidation in the biphasic emulgel systems.
JOURNAL OF THE SCIENCE OF FOOD AND AGRICULTURE
(2022)
Article
Chemistry, Physical
Malek El-Aooiti, Auke de Vries, Derick Rousseau
Summary: The study suggests that low molecular weight surfactants can demulsify particle-stabilized water-in-oil (W/O) emulsions. The ability of surfactants to modify the wettability of interfacially-bound particles determines their demulsification effectiveness. Among the six surfactants tested, propylene glycol monolaurate (PgML), sorbitan monolaurate (SML), and citric acid esters of monoglycerides (CITREM) were effective demulsifiers, while sorbitan trioleate (STO), polyglycerol polyricinoleate (PGPR), and sorbitan monooleate (SMO) were ineffective. Emulsion destabilization was associated with faster release of sodium chloride (NaCl) from the internal phase.
JOURNAL OF COLLOID AND INTERFACE SCIENCE
(2023)
Article
Chemistry, Applied
Xin Hu, Bernard P. Binks, Zhenggang Cui
Summary: The nonionic surfactant sucrose stearate C-1801 can form crystals at high temperature in oil, which then stabilize water-in-oil (W/O) Pickering emulsions. These emulsions show long-term stability even after undergoing multiple heating-cooling cycles and freeze-thaw cycles. The behavior of C-1801 as an emulsifier demonstrates its potential as a stabilizer for W/O food products.
FOOD HYDROCOLLOIDS
(2022)
Article
Chemistry, Multidisciplinary
Seon-Ae Hwangbo, Seung-Yul Lee, Bu-An Kim, Chang-Kwon Moon
Summary: This paper presents an efficient method for surfactant-free nano-emulsification and discusses the effects of different operating parameters and particle size on emulsion stability. The focused ultrasonic system showed the best performance, producing stable nano-emulsions with a small particle size distribution.
Article
Chemistry, Physical
Huan Li, Xuefeng Liu
Summary: The research demonstrates that dynamic imine surfactants can be constructed in water through the formation of dynamic imine bonds, leading to the creation of dynamic combinatorial libraries. Different amphiphilic DIS have varying effects on stabilizing emulsions, with SBBA-HA (or SBBA-BA) DIS being suitable for stable emulsions while SBBA-OA (or SBBA-DA) DIS is not.
JOURNAL OF COLLOID AND INTERFACE SCIENCE
(2022)
Article
Engineering, Chemical
Yi Lu, Rui Li, Rogerio Manica, Qingxia Liu, Zhenghe Xu
Summary: CO2-responsive surfactants can enhance heavy oil recovery by adjusting their interfacial activity and can be partially recycled for water treatment, showing promising applications in various industries.
Article
Pharmacology & Pharmacy
Salman Akram, Nicolas Anton, Ziad Omran, Thierry Vandamme
Summary: Nano-emulsions are stable suspensions of nano-scaled droplets with high loading capacities, typically used for various purposes such as formulation processes and loading capabilities. While direct nano-emulsions have been extensively studied, reverse nano-emulsion technology shows promise as an alternative for drug delivery systems, offering advantages like spontaneous emulsification and improved loading capabilities.
Article
Chemistry, Multidisciplinary
Jianzhong Jiang, Shijie Yu, Wanqing Zhang, Haojie Zhang, Zhenggang Cui, Wenshui Xia, Bernard P. Binks
Summary: The novel charge-reversible surfactant can stabilize smart n-octane-in-water emulsions responsive to pH by transforming from anionic carboxylate to cationic form at different pH values. This allows for intelligent and precise control of stability, viscosity, and droplet size of the emulsions.
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
(2021)
Article
Agricultural Engineering
N. R. H. Rao, V. P. Beyer, R. K. Henderson, W. Thielemans, K. Muylaert
Summary: Flocculation combined with dissolved air flotation (DAF) is a promising technology for harvesting microalgae, and the optimization of flocculant-DAF operating conditions is frequently explored in laboratory experiments. The aim of this study was to systematically compare the harvesting efficiency (eta) between different types of benchtop DAF jars. Evaluation of 30 different types of DAF jars revealed that the eta was not influenced by the volume of the jars, but was impacted by the height to diameter ratio. These results provide useful guidance for the design of lab-scale DAF microalgae harvesting experiments.
BIORESOURCE TECHNOLOGY
(2023)
Article
Environmental Sciences
Duksoo Jang, Jaeyoung Lee, Am Jang
Summary: Pre-coagulation of oil-water emulsions effectively mitigates membrane fouling on ceramic membranes by reducing the zeta potential of oil droplets, increasing droplet size, and alleviating hydrophobic interactions between droplets and the membrane surface.
Review
Environmental Sciences
Wamda Faisal, Fares Almomani
Summary: This review introduces the application of chemical demulsifiers in the recovery of oil from water and water from oil. Different types of surfactants involved in emulsion formation and stability enhancement are discussed, and promising demulsifiers such as nanoparticles, hyperbranched polymers, and ionic liquids are explored. Functionalized magnetic nanoparticles and hyperbranched polymers achieve high oil recovery rates, while ionic liquids have limitations due to their high cost. Nanoparticles show excellent oil recovery behavior at low concentrations and ambient temperature.
Article
Energy & Fuels
Roland Nagy, Andrea Elekes, Laszlo Bartha, Mate Hartyanyi, Sandor Puskas
Summary: The study aimed to determine the dynamic viscosity of settled oil-in-water emulsions, and the test results showed that the composition of polymeric flow modifier and surfactant mixture significantly influence the viscosity and stability of crude oil-in-water emulsions.
PETROLEUM SCIENCE AND TECHNOLOGY
(2021)
Article
Engineering, Chemical
Paulina Maziarz, Jakub Matusik, Tiina Leiviska, Tomasz Strazek, Czeslaw Kapusta, Wieslaw Marek Woch, Waldemar Tokarz, Katarzyna Gorniak
SEPARATION AND PURIFICATION TECHNOLOGY
(2019)
Article
Engineering, Environmental
Paulina Maziarz, Jakub Matusik, Tomasz Straczek, Czeslaw Kapusta, Wieslaw Marek Woch, Waldemar Tokarz, Agnieszka Radziszewska, Tiina Leiviska
CHEMICAL ENGINEERING JOURNAL
(2019)
Article
Engineering, Environmental
Ruichi Zhang, Tiina Leiviska, Juha Tanskanen, Baoyu Gao, Qinyan Yue
CHEMICAL ENGINEERING JOURNAL
(2019)
Article
Engineering, Environmental
Emmanuel Abu-Danso, Sirpa Peraniemi, Tlina Leiviska, TaeYoung Kim, Kumud Malika Tripathi, Amit Bhatnagar
JOURNAL OF HAZARDOUS MATERIALS
(2020)
Article
Environmental Sciences
Elisangela Heiderscheidt, Heini Postila, Tiina Leiviska
SCIENCE OF THE TOTAL ENVIRONMENT
(2020)
Article
Engineering, Environmental
Ruichi Zhang, Ingar Walder, Tiina Leiviska
Summary: The study found that CFH-12 was effective in removing vanadium from mining waters, with oxidized vanadium (5+) present in the used material. Additionally, the pH of the influent water influenced the coagulant dosage in the removal process.
JOURNAL OF HAZARDOUS MATERIALS
(2021)
Article
Engineering, Environmental
Zhongfei Ren, Ulrich Bergmann, Tiina Leiviska
Summary: Hydrated electrons generated from the UV/sulfite process have proved to be effective in degrading PFOA in water, with higher pH conditions enhancing the degradation significantly. However, the presence of carbonate, nitrate, and humic acid can significantly inhibit the degradation of PFOA.
Article
Water Resources
Hanna Virpiranta, Sanna Taskila, Tiina Leiviska, Jouko Vepsalainen, Jaakko Ramo, Juha Tanskanen
Summary: The study found that conditioned sewage sludge is the most efficient low-cost carbon source under cold conditions, while succinate plays a predictable and efficient role in biological sulfate reduction. Peat not only adsorbs sulfate, but also serves as a nutrient source in the sulfate reduction process.
JOURNAL OF WATER AND CLIMATE CHANGE
(2021)
Article
Environmental Sciences
T. Leiviska, S. Risteela
Summary: The study examined the occurrence of pharmaceuticals, hormones, and bacterial community structures at a wastewater treatment plant in Finland with two parallel treatment lines. It found that there were fluctuations in species richness and diversity in the effluent samples, with a marked decrease observed between August and November. The study also showed differences in removal rates between conventional activated sludge treatment and membrane bioreactor treatment.
ENVIRONMENTAL POLLUTION
(2022)
Article
Engineering, Environmental
Ruichi Zhang, Baogang Zhang, Tiina Leiviska
Summary: Vanadium was successfully recovered from spent iron sorbent using a two-step process of alkaline leaching and precipitation with CaCl2. The optimal conditions for precipitation were determined and the differences in vanadium forms and crystalline structures in different sources of iron sorbent were identified.
RESOURCES CONSERVATION AND RECYCLING
(2022)
Article
Engineering, Environmental
Hanna Virpiranta, Tiina Leiviska, Sanna Taskila, Juha Tanskanen
Summary: This study successfully achieved the bioregeneration of strong base anion exchange resin loaded with sulfate using sulfate-reducing bacterial cultures. The bioregeneration capacity increased with regeneration time, with sulfate mainly reduced by the bacteria. The study demonstrated that biological sulfate reduction can be combined with ion exchange for sulfate removal, without generating brine.
Article
Water Resources
Eugenia Krasavtseva, Harshita Gogoi, Anton Svetlov, Tiina Leiviska, Dmitriy Makarov
Summary: This paper presents the results of wastewater treatment at a mining enterprise in the Murmansk region, Russia, focusing on sulfate, manganese, and strontium removal. A two-stage scheme using aminated peat biosorbent and commercial brucite-based sorbent was proposed and tested for wastewater purification. Optimal conditions were established to achieve maximum available concentration levels for fishery purposes.
MINE WATER AND THE ENVIRONMENT
(2023)
Article
Engineering, Environmental
Adedayo Bello, Bice S. Martincigh, Vincent O. Nyamori, Tiina Leiviska
Summary: This study compared the performance of tannin and iron sulphate coagulants for vanadium removal from effluent of an abandoned vanadium mine. Quebracho tannin coagulant showed impressive turbidity and vanadium removals over a wide pH range, while spruce tannin coagulant was less effective at pH 9. Iron sulphate performed better in terms of vanadium removal with lower doses, but required precise pH control for turbidity removal.
CHEMICAL ENGINEERING JOURNAL
(2023)
Article
Environmental Sciences
Zhongfei Ren, Ulrich Bergmann, Jean Noel Uwayezu, Ivan Carabante, Jurate Kumpiene, Tore Lejon, Tiina Leiviska
Summary: This study investigates the enrichment and destruction of perfluorooctanoic acid (PFOA) using a combined method of sorption/desorption and photocatalytic reduction. A new biosorbent, derived from pine bark, shows excellent removal efficiency for PFOA at low concentrations. The groundwater treatment utilizing the biosorbent reduces the total concentration of PFAS significantly. Desorption experiments demonstrate the effectiveness of NaOH and NaOH + methanol for PFOA desorption from the spent biosorbent. Combined adsorption/desorption and a UV/sulfite system prove to be a feasible solution for PFAS removal in environmental remediation.
ENVIRONMENTAL RESEARCH
(2023)
Article
Engineering, Environmental
Hanna Virpiranta, Samuel Okyere Abayie, Jarmo Makikangas, Mika Puirava, Kirsi Koivula, Tiina Leiviska
Summary: In this study, a comprehensive treatment process was proposed to improve the quality of fish processing wastewater. Modular dissolved air flotation (DAF) and biochar filtration were used to remove oil, grease, suspended solids, and absorb residual nutrients. The DAF treatment effectively removed oil and grease, while the biochar filtration clarified the wastewater and adsorbed residual nutrients. The spent biochar also showed improved properties as a possible soil conditioner.
JOURNAL OF ENVIRONMENTAL CHEMICAL ENGINEERING
(2023)
Article
Engineering, Chemical
Yunfei Yu, Xue Yang, Chenchen Zhang, Jie Chen, Wei Lin, Jianqiang Meng
Summary: This study reports an environmentally friendly and simple approach for preparing double-network (DN) ion gel membranes with high strength and excellent gas separation performance. By optimizing crosslinking density, mass ratio, and the type and content of free ionic liquid, the mechanical and gas separation properties of the DN membrane are improved.
SEPARATION AND PURIFICATION TECHNOLOGY
(2024)
Article
Engineering, Chemical
Si-qi Jiang, Qiang Gao, Xi-guang Li, Chao-zhu Deng, Jun Qiu, Xiang-nan Zhu
Summary: A dual-strengthening pretreatment method is proposed to remove PVDF more efficiently and enhance the leaching of LiCoO2. Experimental results show that dual-strengthening pretreatment can effectively remove PVDF and significantly improve the leaching efficiency compared to single pretreatment methods.
SEPARATION AND PURIFICATION TECHNOLOGY
(2024)
Article
Engineering, Chemical
Zengchi Hu, Xiaoyu Wang, Xiaohui Zhang, Xue Li, Jiangbin Xia
Summary: The rapid fabrication of high-performance composite membranes based on CMPs using simple and low-cost methods is challenging. In this study, three CMPs-based composite membranes were rapidly fabricated with adjustable size using unidirectional diffusion synthesis. The microstructural design enhanced the rejection rates of the membranes and they showed strong hydrolytic resistance, thermal stability, and acid-base resistance. Electrostatic adsorption and the adjustable microstructures significantly varied the repellence of the membranes to different charged molecules.
SEPARATION AND PURIFICATION TECHNOLOGY
(2024)
Article
Engineering, Chemical
Farzaneh Rouhani, Matineh Ayedi, Nasser Safari
Summary: Introducing defects into porous metal-organic frameworks is important for improving their adsorption performance. Quasi-MOFs, an underutilized variant of large-scale, fundamentally deficient MOFs, have been found to have substantial amounts of unsaturated metal sites to offset the drawbacks of MOFs. In this study, a quasi-MOF was produced using a water-stable MOF and demonstrated significantly improved phosphate adsorption capability due to the presence of defect sites.
SEPARATION AND PURIFICATION TECHNOLOGY
(2024)
Article
Engineering, Chemical
Valentin Reungoat, Morad Chadni, Louis M. M. Mouterde, Fanny Brunissen, Florent Allais, Helene Ducatel, Irina Ioannou
Summary: This study focuses on the recovery of sinapic acid using liquid-liquid extraction assisted by a hollow fiber membrane contactor from an aqueous feed obtained through the hydrolysis of mustard bran. The screening of solvents of different chemical nature showed that all tested solvents had an extraction efficiency of more than 80% for pH < 5. Four solvents were selected for use in the hollow fiber membrane contactor, and the volatile solvents showed higher mass transfer coefficients compared to non-volatile solvents. The extraction efficiency was intensified by increasing the initial concentration of sinapic acid and the feed-to-solvent ratio. CPME was found to have optimal recovery efficiency at a phase ratio of 8:1, yielding 0.9 g of sinapic acid per liter of CPME used.
SEPARATION AND PURIFICATION TECHNOLOGY
(2024)
Article
Engineering, Chemical
Takahiro Sakamoto, Takafumi Hanada, Hayate Sato, Mayu Kamisono, Masahiro Goto
Summary: The emergence of the battery society has led to a high demand for battery metals, resulting in a strain on their supply. This study introduces a novel technique using a hydrophobic deep eutectic solvent (DES) for leaching and recovering battery metals from low-grade nickel laterite ores. The DES enables selective leaching and recovery of the metals, offering a promising pathway for the extraction of critical battery metals.
SEPARATION AND PURIFICATION TECHNOLOGY
(2024)
Article
Engineering, Chemical
Rongrong He, Jiarui Chen, Chunyao Zhang, Dan Lu, Lin Zhang, Tao He
Summary: Researcher has developed a method to quantify the charge density in nanofiltration (NF) membrane separation layer and applied it in NF membranes that can separate Mg2+ and Li+. The results showed that overcompensated amine groups played a major role, and there was a linear relationship between charge density and coating bi-layers or PAH layers.
SEPARATION AND PURIFICATION TECHNOLOGY
(2024)
Article
Engineering, Chemical
Zhijian Zhang, Min Chen, Zhe Lin, Zhichao Yang, Yafeng Du, Zhihui Chen, Zhenhao Yang, Kongyin Zhao, Ligang Lin
Summary: Membrane technology plays an important role in molecular/ion separation processes, but faces challenges such as membrane fouling. This study introduces a new ion-crosslinking method to fabricate copper alginate hydrogel membranes with improved mechanical strength and antimicrobial capabilities. The membranes exhibit excellent separation performance and enhanced long-term molecule/ion separation through improved anti-swelling properties. Molecular dynamics simulations and life cycle analysis highlight the pore structure and environmental friendliness of the hydrogel membranes. These findings provide valuable insights for developing sustainable hydrogel membranes with stable performance and high separation efficiency.
SEPARATION AND PURIFICATION TECHNOLOGY
(2024)
Article
Engineering, Chemical
Dongmei Liu, Aiying Guo, Yanling Qi, Zhixin Ji, Hongjuan Li, Zhiwei Zhang, Xinyue Zhang, Kunze Wu, Aijun Cai
Summary: In this study, a stable magnetic Mg/Mn-layered double oxide-doped biochar composite (MgMnLDO-MBC) was prepared and successfully used for the removal of antibiotics and bacteria from wastewater. The composite exhibited enhanced surface areas, adsorption sites, and free radicals, leading to improved catalytic activity. The effects of different factors on the removal efficiency were evaluated, and the composite showed good reusability.
SEPARATION AND PURIFICATION TECHNOLOGY
(2024)
Article
Engineering, Chemical
Feng Wang, Zhaoyong Bian, Yaru Zhang, Wenchao Yu, Qiang Zhang, Hui Wang
Summary: In this study, a nanofibrous layered structure of Ff-Ti3C2Tx-Co3O4 was prepared by self-assembling nanofibrous Co3O4 with lamellar fluorine-free MXene (Ff-Ti3C2Tx). The Ff-Ti3C2Tx-Co3O4 exhibited excellent catalytic activity for degradation, resistant to ionic interference, and maintained high removal efficiency of sulfamethoxazole (SMX) in municipal wastewater. The rapid SMX degradation involved fast electron transfer in redox cycles with PMS and the generation of 1O2 via PMS ->center dot O2 -> 1O2. This work provides new insights into antibiotic degradation mechanisms and electron transfer based on PMS activation.
SEPARATION AND PURIFICATION TECHNOLOGY
(2024)
Article
Engineering, Chemical
Weipeng He, Jiacheng Luo, Yujie Wu, Tianhao Luo, Chen Tang
Summary: This study comparatively evaluated the role of cationic, anionic, and nonionic polyacrylamides (PAMs) in ballasted flocculation of clay suspensions under different aluminum sulfate (AS) coagulant dosages. The selection of PAMs and AS dosage had a significant influence on the size and shear resistance of ballasted floc aggregates.
SEPARATION AND PURIFICATION TECHNOLOGY
(2024)
Article
Engineering, Chemical
Lixian Wang, Lizhi Zhao, Didi Si, Zhixin Li, Huiqin An, Hui Ye, Qingping Xin, Hong Li, Yuzhong Zhang
Summary: Metalloporphyrin-based nanozymes integrated with poly (vinylidene fluoride) membrane show high catalytic activity and reusability for the decolorization of Congo Red dye in continuous flow process.
SEPARATION AND PURIFICATION TECHNOLOGY
(2024)
Article
Engineering, Chemical
Yongfei Ma, Chenyu Zeng, Yongzhen Ding, Jiayi Tang, Ondrej Masek, Zhikang Deng, Rui Mu, Zulin Zhang
Summary: In this study, sludge-derived biochar (SBC) was functionalized with various iron salts to enhance its adsorption ability for sulfamethoxazole (SMX) and magnetic collection performance. Ball milling was further employed to treat the optimal iron salt functionalized SBC (MSBC), resulting in ball milled SBC (BMSBC) with improved adsorption performance for SMX. The dominant driving mechanism for SMX adsorption onto BMSBC was confirmed to be multiple physicochemical forces, including 7C-7C conjugation, pore filling, H-bonding, Fe-O complexation, and electrostatic interactions. BMSBC exhibited favorable adsorption ability for SMX in actual waters and could be easily collected within 1 min due to its magnetic sensitivity.
SEPARATION AND PURIFICATION TECHNOLOGY
(2024)
Article
Engineering, Chemical
Jinglin Tan, Xiaohui Mao, Wenjihao Hu, Hongbo Zeng
Summary: This study investigates the influence of PDMS chain architectures on surface properties and reveals that PDMS coatings with looped structures exhibit superior hydrophobicity, self-cleaning, and water sliding compared to coatings with linear structures. Additionally, both looped and linear PDMS coated stainless steel mesh/polyester fibers show efficient separation of oil/water mixture.
SEPARATION AND PURIFICATION TECHNOLOGY
(2024)
Article
Engineering, Chemical
Wei-Liang Chen, Chih-Chia Cheng, Chien-Hsing Lu, Jem-Kun Chen
Summary: This study designs a novel sandwich-structured capacitor that reduces the absorption time of pollutants using dielectrophoresis force. By coating graphene oxide on polystyrene microspheres as adsorbents and encapsulating them within the capacitor, the adsorption rate is significantly enhanced. Additionally, frequency manipulation allows for the recycling of adsorbents and concentration of dyes, minimizing secondary pollution.
SEPARATION AND PURIFICATION TECHNOLOGY
(2024)
