Article
Engineering, Environmental
Rana Malhas, Taiyeba Alamgir, Abrar Benhusain, Nadeen Alotaibi, Noor Alhaddad
Summary: In this study, the effects of various process parameters on the removal of oil from oily wastewater using Fe3O4 magnetic nanoparticles were investigated. The results showed that Fe3O4 nanoparticles are highly effective and reusable for oil removal.
JOURNAL OF WATER PROCESS ENGINEERING
(2023)
Article
Chemistry, Multidisciplinary
Marwa Bendaia, Sabir Hazourli, Adel Aitbara, Nait Merzoug
Summary: Electrocoagulation process was effective in removing Acid Red 14 in bath essays, achieving high decolorization and COD removal efficiencies with low electrical energy consumption. The experimental results were well-modeled by Langmuir and Freundlich isotherms, following first-order reaction kinetics.
SEPARATION SCIENCE AND TECHNOLOGY
(2021)
Article
Environmental Sciences
Asha Singh, Dinesh Arora, Renu Bala, Anil Khokhar, Sunil Kumar
Summary: In this study, nanoparticles prepared from aquatic plants Salvinia molesta and Typha latifolia were loaded onto powdered form to create nanocomposite adsorbents for wastewater treatment. The adsorption capacity, optimal working conditions, and mechanisms of the novel adsorbents were evaluated.
ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
(2023)
Article
Engineering, Environmental
Nazeri Abdul Rahman, Allene Albania Linus, Calvin Jose Jol, Nur Syahida Abdul Jalal, Chieng Kwong Ming, Wan Wafi Shahanney Wan Borhan, Nooranisha Baharuddin, Shaleen Nur Ain Samsul, Nurshazatulaini Abdul Mutalip
Summary: The study investigates the treatment of peat water using a continuous electrocoagulation system with aluminum electrodes. It finds that the variable kinetic order (VOK) model combined with the Freundlich isotherm model is the most suitable for predicting the removal of impurities from peat water. This study demonstrates the effectiveness of using VOK-Freundlich kinetic model in treating peat water with a continuous electrocoagulation system.
JOURNAL OF ENVIRONMENTAL CHEMICAL ENGINEERING
(2023)
Article
Energy & Fuels
Ehab S. Ali, Ramy H. Mohammed, A. E. Zohir, A. M. Farid, Ramadan N. Elshaer, Hamdy H. El-Ghetany, Ahmed A. Askalany
Summary: A precise gravimetric sorption apparatus was developed to measure the adsorption isotherms and kinetics of water vapor onto porous materials with high accuracy and reliability.
Article
Environmental Sciences
Min Liu, Xiaocheng Song, Qian Wang, Shilei Li, Siwang Kou, Zhenhui Gao, Wen Zhuang
Summary: This study investigated the adsorption of thallium (Tl) by microplastics and found that polyethylene (PE) and polypropylene (PP) mainly adsorbed Tl through physical adsorption, while polystyrene (PS) had the highest adsorption capacity through surface complexation. The adsorption of Tl on microplastics was influenced by salinity, pH, and competitive cations in seawater. The results provide valuable information for understanding the environmental behavior of Tl and ecological risk assessment.
FRONTIERS IN MARINE SCIENCE
(2022)
Article
Environmental Sciences
Marcela Paredes-Laverde, Diego F. Montano, Ricardo A. Torres-Palma
Summary: The presence of dyes and pharmaceuticals in natural waters is becoming a global concern. In this study, the potential of montmorillonite (MMT) as an adsorbent for the removal of various dyes and pharmaceuticals from water was evaluated. The adsorption capacity of MMT was found to be influenced by attractive forces between the contaminants and MMT, and adsorption isotherms and kinetics were well described by Langmuir and pseudo-second-order models, respectively. The findings demonstrated that MMT can efficiently remove certain contaminants through electrostatic attractions and hydrogen bonding.
Article
Environmental Sciences
Jenan A. Al-Najar, Shurooq Talib Al-Humairi, Tagreed Lutfee, Deepanraj Balakrishnan, Ibham Veza, Manzoore Elahi M. Soudagar, Islam M. R. Fattah
Summary: This study investigates the potential of natural adsorbents, namely animal bones and anise residues, for removing oil from water. The results show that animal bones exhibit superior oil removal capacity compared to anise residues, removing 45 mg/g of oil compared to 30 mg/g. Additionally, animal bones achieve a higher percentage removal rate of 94% compared to 70% for anise residues. Various kinetic and adsorption models were used to analyze the adsorption process.
Article
Environmental Sciences
Zihao Fu, Zijin Hong, Junling Wei, Yukai Liao, Songlin You, Yifan Wang, Jianjing Lv, Huan Feng, Marek Kolencik, Xuexiu Chang, Yu Qian
Summary: This study investigates the sediment phosphorus fractionation, adsorption kinetics, and adsorption isotherm characteristics of two rivers in China, with the aim of exploring management options for maintaining river water quality. The results show that sediment phosphorus fractions and adsorption characteristics are closely related and can be affected by human disturbance. The findings provide useful guidance for protecting the drinking water source reservoir.
JOURNAL OF SOILS AND SEDIMENTS
(2022)
Article
Environmental Sciences
Ramiro Picoli Nippes, Paula Derksen Macruz, Luiza Carla Augusto Molina, Mara Heloisa Neves Olsen Scaliante
Summary: This study investigated the adsorption capacity of natural zeolite clinoptilolite for removing the drug hydroxychloroquine. The results showed that clinoptilolite zeolite is a potential adsorbent for reducing HCQ toxicity in aquatic matrices. Additionally, the zeolite can be easily regenerated for repeated use.
WATER AIR AND SOIL POLLUTION
(2022)
Article
Thermodynamics
Ana Maria Diaz-Diaz, Jorge Lopez-Beceiro, Yanchun Li, Yi Cheng, Ramon Artiaga
Summary: The study proposed a model to mathematically describe the isothermal crystallization kinetics of a polymer from the melt, using differential scanning calorimetry curves obtained from the molten state at different temperatures. The model was tested on a commercial 3D printing polylactic acid (PLA) sample and successfully fitted all DSC curves. The results suggest the existence of multiple crystal forms of PLA and provide a new approach for understanding and predicting the crystallization process of the polymer.
JOURNAL OF THERMAL ANALYSIS AND CALORIMETRY
(2021)
Article
Engineering, Environmental
Laishram Saya, W. Rameshwor Singh, Sunita Hooda
Summary: Given the large amount of harmful pharmaceuticals being released into the water stream, it is crucial to eradicate or reduce these chemicals to a minimum permissible limit. This study reports the fabrication of a magnetic guar gum graphene oxide nano-composite (mGG/GO NC) for the adsorption of ciprofloxacin from wastewater. Various techniques were used to characterize the guar gum and the nanocomposite, and it was found that the adsorption process followed the pseudo second order model and Langmuir isotherm model. The nanocomposite exhibited high adsorption capacity and recyclability, potentially due to a synergistic effect of multiple interactions in the adsorption mechanism.
JOURNAL OF ENVIRONMENTAL CHEMICAL ENGINEERING
(2023)
Article
Chemistry, Inorganic & Nuclear
Zaifu Yang, Tong Zhu, Meiyu Xiong, Anran Sun, Yujuan Xu, Yansheng Wu, Wenjun Shu, Zhinan Xu
Summary: Fe-Al-MOF, synthesized via solvothermal one-step treatment, showed excellent phosphate sorption capacity and strong interference immunity in real wastewater conditions. The experimental data fit the Langmuir and pseudo-second-order models, with main adsorption mechanisms including chemical adsorption, ligand exchange, and electrostatic attraction.
INORGANIC CHEMISTRY COMMUNICATIONS
(2021)
Article
Biotechnology & Applied Microbiology
Ze Wu, Jie Dong, Yingwu Yao, Yang Yang, Feng Wei
Summary: The novel electrocoagulation reactor described in this paper effectively removes azo dyes from aqueous solutions utilizing bend electrode plates. Under optimal conditions, the decolorization rate of methyl orange significantly improves, and both the second-order kinetic model and Langmuir isotherm model are suitable for describing the process.
ENVIRONMENTAL TECHNOLOGY & INNOVATION
(2021)
Review
Environmental Sciences
Don Berslin, Angelin Reshmi, Baskaran Sivaprakash, Natarajan Rajamohan, P. Senthil Kumar
Summary: This review focuses on the effective application of biochar in treating water contaminated by chromium, lead, and arsenic. It highlights the on-field applications of biochar in soil amendment, industrial wastewater treatment, and groundwater treatment. The article also discusses the feedstock for biochar production, various production processes, and the importance of optimal conditions. The removal performance and adsorption mechanism of biochar at different working conditions are consolidated.
Article
Thermodynamics
Mingming Zhang, Anton Timoshin, Essam A. Al-Ammar, Mika Sillanpaa, Guiju Zhang
Summary: The current paper proposes a new hybrid system based on a binary-geothermal system to generate power, cooling capacity, freshwater, and hydrogen. The system integrates organic Rankine cycle, ejector refrigeration cycle, proton exchange membrane electrolyzer, and reverse osmosis desalination unit. Through precise modeling in Matlab, the system's performance is optimized using multi-objective grey wolf optimization. Results show that the system can achieve high power output, cooling capacity, hydrogen production, and freshwater generation with cost-effectiveness.
Article
Environmental Sciences
Heba Saed Kariem Alawamleh, Seyedsahand Mousavi, Danial Ashoori, Hayder Mahmood Salman, Sasan Zahmatkesh, Mika Sillanpaa
Summary: The study aims to improve the performance of membrane treatment for oily wastewater. The effects of pre-treatment, membrane modification, and operational parameters on the microfiltration membrane system were investigated. The results showed that using PFS as a coagulant at pH=6 can achieve a COD reduction of 98%, while using PFC at the same conditions only removes 81% of COD.
Article
Biochemistry & Molecular Biology
Muhammad Pervaiz, Muti Ur Rehman, Faisal Ali, Umer Younas, Mika Sillanpaa, Rizwan Kausar, Asma A. Alothman, Mohamed Ouladsmane, Mohammad Abdul Mazid
Summary: Cellulose/MoS2/GO nanocomposite was synthesized using a hydrothermal method. The formation of the nanocomposite was confirmed by UV-visible and FTIR spectroscopy, and its particle size and morphology were characterized. The nanocomposite exhibited promising biomolecule protective and photocatalytic potential, making it suitable for environmental remediation.
BIOINORGANIC CHEMISTRY AND APPLICATIONS
(2023)
Article
Thermodynamics
Yiran Yang, Gang Li, Tao Luo, Mohammed Al-Bahrani, Essam A. Al-Ammar, Mika Sillanpaa, Shafaqat Ali, Xiujuan Leng
Summary: This study aims to predict building energy consumption by using neural networks such as support vector machine, gated recurrent unit, extreme learning machine, long short-term memory, and shuffled frog leaping algorithm as an optimizer. Statistical results indicate that long short-term memory and support vector machine are the best neural networks for cooling and heating load forecast, respectively.
Article
Engineering, Environmental
Mohua Li, Liang Bai, Shengtao Jiang, Mika Sillanpaa, Yingping Huang, Yanbiao Liu
Summary: Selective electrochemical reduction of oxygen (O-2) via 3e(-) pathway to produce hydroxyl radicals (HO) is a promising alternative to conventional electro-Fenton processes. A nitrogen-doped CNT-encapsulated Ni nanoparticle electrocatalyst (Ni@N-CNT) was developed, which exhibited high selectivity towards O-2 reduction and generation of HO•via 3e(-) pathway. The exposed graphitized N on the CNT shell and Ni nanoparticles encapsulated within the tip of the N-CNT played crucial roles in the generation of *HOOH through a 2e(-) oxygen reduction reaction. The encapsulated Ni nanoparticles at the tip of the N-CNT also facilitated the direct decomposition of electrogenerated *H2O2, leading to sequential generation of HO• through a 1e(-) reduction reaction on the N-CNT shell without inducing Fenton reaction. Improved bisphenol A (BPA) degradation efficiency was observed compared to conventional batch systems (97.5% vs 66.4%). Trials using Ni@N-CNT in a flow-through configuration demonstrated complete removal of BPA within 30 minutes (k = 0.12 min(-1)) with a limited energy consumption of 0.068 kW.h.g(-1) TOC.
JOURNAL OF HAZARDOUS MATERIALS
(2023)
Article
Chemistry, Analytical
Kanthappa Bhimaraya, Jamballi G. Manjunatha, Karnayana P. Moulya, Ammar M. Tighezza, Munirah D. Albaqami, Mika Sillanpaa
Summary: The electrochemically polymerized glycine layered carbon paste electrode (EPGNLCPE) was used as an easy and rapid analytical tool for the analysis of levofloxacin (LN). The EPGNLCPE sensor, compared to the bare carbon paste electrode (BCPE), showed improved surface features and activities. Under optimized conditions, the differential pulse voltammetry method using EPGNLCPE exhibited good linearity, low limit of detection, and low limit of quantification for the analysis of LN. Real-time application of the sensor showed good recovery of LN in medicinal samples.
Article
Horticulture
Mervat A. Ali, Samir G. Farag, Mika Sillanpaa, Saleh Al-Farraj, Mohamed E. A. El-Sayed
Summary: The addition of superabsorbent polymers (SAPs) to soil improves soil properties and increases plant yields. The goal of the study was to investigate the effectiveness of SAPs in reducing mineral fertilizer usage and producing high-quality grapes. The study was conducted in a private vineyard in Egypt over three seasons and found that increasing the amount of applied polymer significantly enhanced bud burst, growth parameters, nutrient content, and yield.
Review
Engineering, Environmental
Thuhin Kumar Dey, Jingwei Hou, Mika Sillanpaa, Biplob Kumar Pramanik
Summary: Micro/nanoplastics (MPs/NPs) are widespread and pose a significant threat to the environment. Metal-organic frameworks (MOFs)-based membranes have gained attention for their potential in removing MPs/NPs from water and wastewater. However, challenges such as re-aggregation, cross-contamination, and poor structural stability need to be addressed for the successful application of MOF membranes.
CHEMICAL ENGINEERING JOURNAL
(2023)
Article
Chemistry, Physical
Abir Melliti, Murat Yilmaz, Mika Sillanpaa, Bechir Hamrouni, Radek Vurm
Summary: In this study, low-cost activated carbon (AC-DPF) made from date palm fiber waste was used to remove lead and copper from water systems. AC-DPF had a large surface area and high adsorption capacity, with removal efficiencies of 92% for Pb(II) and 80% for Cu(II). The adsorption kinetics and thermodynamics of AC-DPF were investigated, and competitive and antagonistic effects were observed in the multicomponent system. Overall, AC-DPF showed great potential as a highly promising, effective, and feasible adsorbent for heavy metal removal.
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
(2023)
Article
Chemistry, Analytical
Shilpi Verma, Mamleshwar Kumar, Ramanpreet Kaur, Praveen Kumar, Mika Sillanpaa, Urska Lavrencic Stangar
Summary: This study analyzed the combustion and pyrolysis behaviors of PTA wastewater sludge and observed reaction orders, exothermic reactions, and auto gasification. The sludges were found to be promising for energy recovery due to their high calorific values. The experimental results were successfully validated using an artificial neural network model.
JOURNAL OF ANALYTICAL AND APPLIED PYROLYSIS
(2023)
Article
Engineering, Environmental
Jingyao Zhang, Jiadong Liu, Bo Gao, Mika Sillanpaa, Jin Han
Summary: This study utilized biochar produced from dehydrated excess sludge to catalytically ozonate pollutants from landfill leachate. The biochar contained necessary catalytic sites originating from inorganic metals and organic matters in the sludge. These sites promoted the generation of reactive oxygen species and the removal rates of pollutants were enhanced by the synergistic interaction between microorganisms. The study provides insight into the mechanism of catalytic ozonation and offers a new approach for practical landfill leachate treatment.
JOURNAL OF HAZARDOUS MATERIALS
(2023)
Article
Chemistry, Physical
Imran Ali, Yu Pakharukov, F. K. Shabiev, E. Galunin, R. F. Safargaliev, S. A. Vasiljev, B. S. Ezdin, A. E. Burakov, Zeid A. Alothman, Mika Sillanpaa
Summary: In this study, graphene-based nanofluids were synthesized and their viscosities were determined. The molecular interactions of graphene nanoparticles were theoretically analyzed to understand the mechanisms affecting the viscosity of nanofluids. An analytical function describing the dependence of the relative viscosity on the concentration of graphene nanoparticles was obtained based on experimental results. It was found that the viscosity of the nanofluid was influenced by the structure of the graphene sheets, and the self-assembly of the nanoparticles played a crucial role in the viscosity changes.
JOURNAL OF MOLECULAR LIQUIDS
(2023)
Article
Chemistry, Physical
Anasheh Mardiroosi, Ali Reza Mahjoub, Amir Hossein Cheshme Khavar, Rabah Boukherroub, Mika Sillanpaeae, Parminder Kaur
Summary: This study synthesizes a variety of perovskite-type titanates (MTiO3, M = Zn, and Mn) and loads them onto functionalized magnetic graphene oxide (EDFG) to produce MTiO3 @EDFG nanocomposites. The materials were fully characterized, and the MTiO3 @EDFG nanocomposites were found to exhibit enhanced photocatalytic activity for the degradation of Rhodamine B under visible light irradiation. The enhanced activity was attributed to the inhibition of nanoparticle aggregation, improved electron transfer, increased surface area, and extended absorption range.
JOURNAL OF MOLECULAR STRUCTURE
(2023)
Review
Engineering, Civil
B. K. Pandey, C. Shukla, M. Sillanpaeae, S. K. Shukla
Summary: The aim of this study was to evaluate the global research trends in the application of electrokinetics in soil stabilization and remediation. A total of 1562 articles published from 1960 to 2022 were analyzed using the Scopus database. The results show that publication output has significantly increased in the last 5 years, with China, USA, Spain, and South Korea being the top contributing countries.
INNOVATIVE INFRASTRUCTURE SOLUTIONS
(2023)
Article
Engineering, Chemical
Shabnam Ahmadi, Soumya Ghosh, Alhadji Malloum, Mika Sillanpaa, Chinenye Adaobi Igwegbe, Prosper E. Ovuoraye, Joshua O. Ighalo
Summary: Molecular modelling and simulation were used to investigate the removal of amoxicillin (AMX) from water using iron nanoparticles (Fe3O4-NPs). The optimal conditions for adsorption were determined. The results showed that AMX molecules have high chemical potential and electrophilicity index, making them reactive. The adsorption of AMX onto Fe3O4-NPs was highly efficient under optimal conditions of pH 3, dosage of 0.5 g/L, AMX concentration of 60 mg/L, and a contact time of 60 min. Langmuir isotherm and pseudo-second-order kinetics provided the best fit to the adsorption data.
INDIAN CHEMICAL ENGINEER
(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)