Article
Engineering, Chemical
Zhiyi Sun, Jun Ma, Yijun Liu, Hui Wang, Weihua Cao, Nanwen Zhu, Ziyang Lou
Summary: Efficient mineralization of refractory organics in oil refinery wastewater was achieved by a novel magnetic Fe2O3/Pr6O11/g-C3N4 (PFCN) based catalytic ozonation method, which increased Lewis acid sites and enhanced electron transfer ability for rapid oxidation and mineralization into CO2 and H2O.
SEPARATION AND PURIFICATION TECHNOLOGY
(2021)
Review
Chemistry, Physical
Wamda Faisal Elmobarak, Bassim H. Hameed, Fares Almomani, Ahmad Zuhairi Abdullah
Summary: The petroleum industry is rapidly growing, leading to increased environmental concerns about wastewater treatment. Advanced oxidation processes (AOP) have been applied for treating petroleum wastewater due to the limitations of conventional treatment methods. Different AOP techniques have shown varying degrees of efficiency in treating petroleum wastewater based on the contaminants present and operating conditions. Ongoing research focuses on further improving the AOP treatment methods for petroleum wastewater.
Article
Energy & Fuels
Sanarya K. Kamal, Ammar S. Abbas
Summary: A Fe-exchanged zeolite photocatalyst was synthesized and used for the degradation of effluent from the petroleum industry. The catalyst showed high efficiency in removing organic pollutants and exhibited excellent stability with low release of iron ions.
CHEMICAL ENGINEERING AND PROCESSING-PROCESS INTENSIFICATION
(2023)
Article
Green & Sustainable Science & Technology
Yuxiao Sun, Yi Liu, Jianqi Chen, Yuan Huang, Hao Lu, Wei Yuan, Qiang Yang, Jiandong Hu, Bichuan Yu, Dun Wang, Weinan Xu, Hualin Wang
Summary: The study achieved efficient removal of suspended solids and oil in petroleum refinery wastewater through a physical method, which also saved a significant amount of chemical consumption and related costs, demonstrating the advantages of the physical pretreatment process in terms of environmental and cost benefits.
JOURNAL OF CLEANER PRODUCTION
(2021)
Article
Engineering, Environmental
Wenda Kang, Shuo Chen, Hongtao Yu, Tengyao Xu, Shuai Wu, Xiaoting Wang, Na Lu, Xie Quan, Heng Liang
Summary: The study improved the mass-transfer performance of the PCO/O-3 process by using a helical photocatalytic module (HPM) in an annular UVC reactor, resulting in significantly higher TOC removal efficiency. The flowing through reactor demonstrated good stability in a continuous test, and the energy efficiency of the PCO/O-3 process in this reactor was higher compared to other processes.
JOURNAL OF HAZARDOUS MATERIALS
(2021)
Article
Engineering, Environmental
Anthony Heebner, Bassim Abbassi
Summary: This study evaluated a new combined treatment approach by combining ozonation and electrolysis for the mineralization of organic compounds in water. The results showed that the method was most effective for TOC removal in alkaline conditions and significantly enhanced performance compared to ozonation alone in acidic conditions. The initial pH had a more significant effect on TOC removal than current density, but both parameters were relevant. Under optimized conditions, 63% TOC removal was achieved.
JOURNAL OF WATER PROCESS ENGINEERING
(2022)
Article
Engineering, Environmental
Ibrahim M. Abu-Reesh, Ansaruddin Kunju, Surajbhan Sevda
Summary: This study investigates the performance of microbial fuel cell (MFC) in treating petroleum refinery wastewater (PRW), and finds that MFC has promising COD removal efficiency and electricity generation capability in continuous mode of operation.
JOURNAL OF WATER PROCESS ENGINEERING
(2022)
Article
Environmental Sciences
Yu Huang, Qiuwen Chen, Zhiyuan Wang, Hanlu Yan, Cheng Chen, Dandan Yan, Xiaowen Ji
Summary: The study found that enhanced coagulation and ozone oxidation processes were effective in removing EDCs from water, with the optimal pH around 7.0. Control of the O3/DOC ratio was crucial for efficient elimination of target contaminants, and ozonation with pre-coagulation resulted in higher removal efficiencies compared to ozonation alone for wastewater treatment.
Article
Environmental Sciences
Haibao Liu, Yue Gao, Jie Wang, Jingwen Pan, Baoyu Gao, Qinyan Yue
Summary: The study successfully utilized an alumina-based bimetallic (Mn-Ce) catalyst as an O-3 activator to treat hypersaline organic wastewater, leading to enhanced mineralization of ciprofloxacin under the MCAO process. The synergistic effects of Mn (III)/Mn (IV) and Ce (III)/Ce (IV) redox pairs promoted the generation of reactive oxygen species, resulting in improved degradation efficiency. Additionally, the MCAO process showed promising potential in remediating hypersaline wastewater with various pollutants.
SCIENCE OF THE TOTAL ENVIRONMENT
(2022)
Article
Chemistry, Analytical
Chen He, Zhi Fang, Yongyong Li, Chunqing Jiang, Suoqi Zhao, Chunming Xu, Yahe Zhang, Quan Shi
Summary: The study characterized two significantly different DOM samples from petroleum refinery wastewater and river water using FT-ICR MS with various ionization modes. It was found that wastewater DOM was dominated by acid O-x and basic N1Ox classes in negative-ion and positive-ion ESI mode, respectively. Refinery wastewater DOM showed higher molecular complexity and enrichment in hydrocarbons, nitrogen- and sulfur-containing compounds compared to riverine DOM.
ENVIRONMENTAL SCIENCE-PROCESSES & IMPACTS
(2021)
Article
Engineering, Environmental
Yudong Li, Hao Lu, Yiqian Liu, Pinyi Dai, Huatong Zhu, Bei Zhang, Shaowei Peng, Yingheng Fan, Qiang Yang
Summary: Refinery wastewater, which is both voluminous and complex in composition, necessitates multi-stage treatment to meet discharge or reuse targets. Traditional pretreatment technologies using inclined plate settlement combined with two-stage air flotation for petroleum and suspension removal suffer from high energy and chemical consumption, as well as generation of significant amounts of hazardous waste. This study introduces a short-process physical pretreatment technology that employs combined fiber coalescer (CFC) and granular media filter (GMF). Pilot testing demonstrates that the treated refinery wastewater, without the addition of chemicals, becomes clear and translucent, with petroleum and suspended solids content reduced to below 20 mg/L, falling within the acceptable range of biochemical influent index. This process greatly reduces the generation and emission of scum and volatile organic compounds (VOCs), providing a new technique for low-carbon pretreatment of refinery wastewater.
JOURNAL OF ENVIRONMENTAL CHEMICAL ENGINEERING
(2023)
Article
Environmental Sciences
Kang-He Zhao, Yu-Long Ma, Feng Lin, Shao-Ying Ge, Li Zhu
Summary: The Mn-Cu-Ce tri-metal oxide supported on gamma-Al2O3 catalyst showed improved catalytic ozonation performance in treating coal chemical wastewater, significantly enhancing removal of TOC and improving biodegradability. The synergy between Mn, Cu, and Ce oxides enriched catalytic active sites and promoted the generation of center dot OH radicals, leading to effective degradation and mineralization of pollutants in the wastewater. Additionally, the catalyst exhibited good stability over multiple treatments, making it a promising candidate for advanced treatment of organic wastewaters through catalytic ozonation.
ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
(2021)
Article
Environmental Sciences
Yazdan Tavoosi, Jamshid Behin
Summary: The effluent generated by Merox unit of oil refinery was used for bovine hide unhairing instead of freshwater, resulting in higher efficiency and faster kinetics. The recycling of the effluent-based lutrom after consecutive runs reduced COD and BOD5 load. Ozone treatment of the effluent-based and conventional lutroms resulted in high-quality and cost-effective pelts.
ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
(2022)
Article
Environmental Sciences
Kaiyan Yang, Zhiyi Sun, Luochun Wang, Ziyang Lou
Summary: E+-Ozonation process accelerates the utilization of ozone and generation rate of hydroxyl radicals, significantly increasing the SCOD and potential carbon source in P-sludge while achieving a high removal rate of TPH, especially for substances with C=C and C-C bonds.
ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
(2021)
Review
Engineering, Environmental
Huiru Ma, Guifang Chen, Fuyu Huang, Yuzhong Li, Liqiang Zhang, Yang Jin
Summary: Ammonia nitrogen is a common pollutant in wastewater, causing eutrophication in water bodies by depleting dissolved oxygen. Catalytic ozonation technology can effectively remove ammonia nitrogen without introducing additional pollutants. This study summarized the removal efficiency, product distribution, and reaction mechanism of different catalysts in catalytic ozonation for ammonia nitrogen.
JOURNAL OF WATER PROCESS 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)