Article
Engineering, Chemical
Omid Pourehie, Javad Saien
Summary: The new homogeneous solar/sodium hypochlorite/iron process showed high COD and TOC removal rates in treating petroleum refinery wastewater, and the COD removal rate could be further improved by multiple feedings of reagents.
SEPARATION AND PURIFICATION TECHNOLOGY
(2021)
Article
Environmental Sciences
Elisabeth Cuervo Lumbaque, Calita Elis Schweigert, Leonardo Oliveira dos Santos, Vladimir Lavayen, Joao Henrique Zimnoch dos Santos, Carla Sirtori
Summary: Solar light-driven photocatalyst from petrochemical industrial waste was evaluated for the degradation of three pharmaceuticals in different water matrices. The experiment results showed significant differences between the photocatalyst and the waste material, suggesting its potential use in degrading contaminants of emerging concern. The study also identified transformation products generated during the treatment, with some showing high toxicity levels for different trophic levels.
ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
(2021)
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
Engineering, Environmental
Yunjin Zhong, Bingying Zhang, Zhexin Zhu, Gangqiang Wang, Xueting Mei, Yu Fang, Wangyang Lu
Summary: Plastic wastes pose a threat to the environment, and degradable materials are considered the most promising solution to plastic pollution. This study synthesized cationic dyeable polyester modified with photocatalyst g-C3N4/TiO2 by centrifugal electrospinning, which had the ability to degrade under solar illumination. The modified polyester showed excellent self-degradation ability in water environment after being modified with 5% g-C3N4/TiO2. After 400 hours of illumination, the polyester matrix could be almost completely degraded. Analysis of degradation products and pathway revealed that the macromolecular chain of polyester underwent chain scission, generating formic acid, sodium sulfate, and short chain substances, which were further degraded into CO2 and H2O. The design of degradable polyester materials helps reduce the generation of polyester micro plastic pollutants.
JOURNAL OF POLYMERS AND THE ENVIRONMENT
(2023)
Article
Engineering, Environmental
Aparna Prabha Devi, Deepak Kumar Padhi, Ashish Madhual, Pravat Manjari Mishra, Ajay Kumar Behera
Summary: A plant biomass mediated ecofriendly synthesis approach was used to design gold nanoparticles (gAuNPs) on reduced graphene oxide (RGO) using Averrhoa carambola leaf extract at room temperature. The combination of folded RGO sheets and polar biomolecules of the leaf extract helped enhance the growth inhibition effect and significantly reduce the size of gAuNPs in the nanocomposite. The synthesized compound was characterized using various techniques including XRD, TEM,STEMHAADF, Raman, FT-IR, and UV-Vis DRS spectra, revealing a size of 8±3 nm for gAuNPs on 2D-RGO sheets. The gAuNPs loaded on RGO exhibited high photocatalytic degradation rates for various pollutants under visible light irradiation.
JOURNAL OF ENVIRONMENTAL CHEMICAL ENGINEERING
(2023)
Article
Engineering, Environmental
Febio Dalanta, Tutuk Djoko Kusworo
Summary: This study investigates the utilization of AC/TiO2/CeO2 composite for the removal of phenol and ammonia-nitrogen compounds from petroleum refinery wastewater. The results show that the composite has excellent removal efficiency and high photocatalytic activity.
CHEMICAL ENGINEERING JOURNAL
(2022)
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)
Review
Engineering, Environmental
Jingkai Lin, Wenjie Tian, Huayang Zhang, Xiaoguang Duan, Hongqi Sun, Hao Wang, Yanfen Fang, Yingping Huang, Shaobin Wang
Summary: This article summarizes the application of metal-free graphitic carbon nitride (g-C3N4) based direct and indirect Z-scheme photocatalysts in solar-driven advanced oxidation processes (AOPs) for the removal of organic pollutants from water. The classification of AOPs, definition and validation of Z-schemes are discussed, followed by an examination of the engineering strategies for CN-based direct Z-scheme structure and the design of indirect CN-based Z-scheme systems using different charge mediators. The relationship between Z-scheme structure and activity is studied to gain insights into improving the catalytic performance of CN-based Z-schemes in AOPs.
JOURNAL OF HAZARDOUS MATERIALS
(2022)
Article
Multidisciplinary Sciences
Ghazi F. Khaleel, Ibrahim Ismail, Ali H. Abbar
Summary: The treatment of wastewater from petroleum refineries is crucial for environmental protection. This study investigated the solar photo-electro-Fenton (SPEF) process for reducing the chemical oxygen demand (COD) in the effluent from the Bijee petroleum refinery plant in Iraq. The experimental results showed that Fe2+ concentration had the greatest impact on COD removal efficiency, accounting for 47.7%. This was followed by current density at 18.26% and the addition of NaCl at 11.20%. The optimized conditions were an initial pH of 3, current density of 10 mA/cm2, Fe2+ concentration of 0.8 mM, NaCl addition of 0.747 g/L, and a duration of 87 minutes, resulting in a COD removal efficiency of 93.20% and an energy consumption of 15.97 kWh/kg COD.
Article
Plant Sciences
Abeer I. Alwared, Fadia A. Sulaiman, Hanan Raad, Tariq J. Al-Musawi, Noor A. Mohammed
Summary: This research aims to develop a novel photocatalyst and investigate its potential to remove amoxicillin from water. The FeNi3/SiO2/TiO2 nanocomposite was characterized and tested for its ability to degrade amoxicillin. The results showed that the nanocomposite had a reasonable efficiency in degrading amoxicillin under optimum operating conditions.
SOUTH AFRICAN JOURNAL OF BOTANY
(2023)
Article
Nanoscience & Nanotechnology
Desislava Daskalova, Gonzalo Aguila Flores, Ulrich Plachetka, Michael Mo''ller, Julia Wolters, Thomas Wintgens, Max C. Lemme
Summary: We enhance the photocatalytic activity of titanium dioxide (TiO2) by combining nanostructured glass substrates with metallic plasmonic nanostructures. By patterning periodic conical grids on the nanostructured glass, we achieve a three-fold increase in surface area, creating a broadband optical absorber. The addition of aluminum and gold activates the structures plasmonically and increases the optical absorption in TiO2 films, resulting in enhanced photocatalytic activity and effective reduction of water pollutants.
ACS APPLIED NANO MATERIALS
(2023)
Article
Environmental Sciences
Daniel R. Wagner, Kevin Ament, Lina Mayr, Thomas Martin, Andre Bloesser, Holger Schmalz, Roland Marschall, Friedrich E. Wagner, Josef Breu
Summary: By utilizing cationic cylindrical polymer brushes as structure-directing agents, Fe2O3 nanoparticles were successfully mesostructured into nanotubes, resulting in faster photodegradation of ciprofloxacin. The non-woven catalyst structure allows for easy recovery and operation in a continuous flow reactor.
ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
(2021)
Article
Materials Science, Ceramics
Dandan Sun, Sayantan Mazumdar, Kewei Wang, Boyan Sun, Ke Sun, Zhenzhong Sun, Yongge Cao, Tao Li
Summary: Hierarchical structure Bi2MoxW1-xO6 solid solutions with high surface area were prepared by hydrothermal method without surfactant. Among them, Bi2Mo0.4W0.6O6 sample showed improved piezocatalytic performance attributed to the larger piezoelectric potential generated under a strained state, facilitating charge carrier transfer and accelerating the degradation process.
CERAMICS INTERNATIONAL
(2022)
Article
Chemistry, Multidisciplinary
Ying Zhang, Yan Wang, Bin Yu, Kuibo Yin, Zhonghua Zhang
Summary: This study investigates the fabrication and performance of nanoporous gold film, revealing its broadband absorption, efficient photothermal conversion, and steam generation capabilities, making it suitable for clean water production and seawater desalination.
ADVANCED MATERIALS
(2022)
Article
Chemistry, Physical
Paul Kant, Shengzhi Liang, Michael Rubin, Geoffrey Alan Ozin, Roland Dittmeyer
Summary: Solar-driven photocatalytic processes offer hopes and dreams for a sustainable future, utilizing carbon dioxide and water as feedstocks for energy and carbon production. However, low efficiencies and high costs are hurdles for scaling up photocatalytic processes. This contribution introduces a low-cost, panel-like photoreactor concept suitable for small-scale and large-scale solar farm applications, achieving high photocatalytic efficiency with a simple design. Optical modeling and analysis establish a design guideline, connecting parameters and performance metrics at a universal level for solar-driven photosynthesis.
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)