Article
Environmental Sciences
Roberta Frinhani Nunes, Patricia Metolina, Antonio Carlos Silva Costa Teixeira
Summary: The study demonstrated that degradation of DPC by SO4·- and HO· radicals generated from UVA and thermal-activated PS was effective, with SO4·- playing a major role. The concentration of PS influenced the degradation rate of DPC, while lower photon emission rates could be compensated by increasing PS concentration.
ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
(2021)
Article
Engineering, Environmental
Sanzeeda Baig Shuchi, Md. Burhan Kabir Suhan, Sufian Bin Humayun, Muhammad Enamul Haque, Md. Shahinoor Islam
Summary: The study demonstrates that heat-activated persulfate is a promising method for efficiently degrading water-soluble dyes in textile wastewater. By adjusting temperature, time, and persulfate concentration, removal rates of the dye can be enhanced. Kinetic study reveals that the degradation of the dye follows a first-order model.
JOURNAL OF WATER PROCESS ENGINEERING
(2021)
Article
Environmental Sciences
Zhendong Yu, Jiachen Ma, Jinlan Dai, Shiyu He, Xiaoyi Huang, Yuancai Lv, Yifan Liu, Chunxiang Lin, Junfeng Chen, Minghua Liu
Summary: In this study, a bimetallic composite catalyst (Co-Fe@C) was fabricated and used to activate peroxydisulfate (PDS) for the degradation of an organic pollutant (p-arsanilic acid, p-ASA). The Co-Fe@C/PDS system effectively degraded p-ASA and efficiently adsorbed released inorganic arsenic species.
ENVIRONMENTAL RESEARCH
(2022)
Article
Engineering, Environmental
Xiang Li, Yang Qin, Huajing Song, Wei Zou, Zhiguo Cao, Linjie Ding, Yuwei Pan, Minghua Zhou
Summary: In this study, catalytic Fe-C microelectrolysis granules (FeBCGs) were successfully prepared and used as activators for the removal of bisphenol A (BPA) under persulfate (PS) activation. The FeBCGs exhibited high stability and efficiency in BPA removal. The study provides guidelines for the design and development of integrated microelectrolysis materials coupled with advanced oxidation processes for water treatment.
PROCESS SAFETY AND ENVIRONMENTAL PROTECTION
(2023)
Article
Environmental Sciences
Saad U. Khan, Hammad Khan, Sajjad Hussain, Lilian D. M. Torquato, Sabir Khan, Raul G. Miranda, Danielle P. Oliveira, Daniel J. Dorta, Joao A. Lima Perini, Hyeok Choi, Maria Boldrin Zanoni
Summary: Photocatalytic activation of persulfate (PS) using Fe2O3 nanoparticles has shown to efficiently degrade reactive red 120 (RR120) dye. Among the different facets of Fe2O3, beta-Fe2O3 exhibited the highest photocatalytic activity due to enhanced charge carrier separation and greater active sites for PS activation. Optimization experiments achieved nearly 100% color removal and 82% organic removal. Scavenger test suggested the involvement of sulfate and hydroxyl radicals in the degradation process. However, the treatment did not significantly reduce the cytotoxicity of the wastewater. Overall, beta-Fe2O3/PS at low doses showed great potential for decomposing and mineralizing recalcitrant dyes in wastewater under visible light.
ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
(2022)
Article
Chemistry, Multidisciplinary
Tong Song, Cong Xie, Quande Che, Ping Yang
Summary: Two-dimensional (2D)/2D g-C3N4/MoO3-x heterojunctions were constructed to enhance photocatalytic phenol removal. Oxygen vacancies in MoO3-x extended absorption in the full solar spectrum, especially in the near-infrared (NIR) region. Improved charge transfer path preserved photogenerated electrons and holes, resulting in enhanced phenol photodegradation performance and photocatalytic activation efficiency of peroxydisulfate (PDS). The presence of oxygen vacancies facilitated the formation of catalyst-PDS* complex, promoting the electron transfer process and exerting a crucial effect as a non-radical pathway.
JOURNAL OF INDUSTRIAL AND ENGINEERING CHEMISTRY
(2023)
Article
Engineering, Environmental
Enric Brillas
Summary: This review provides a critical and comprehensive analysis of different procedures used to activate potent persulfate-based advanced oxidation processes (AOPs) for efficient abatement of antibiotics. The fundamentals, characteristics, and effects of operating variables of various activation methods are described, along with the generation and identification of radical and non-radical oxidizing agents. The toxicity of treated antibiotic solutions by PS-based AOPs is also discussed.
JOURNAL OF ENVIRONMENTAL CHEMICAL ENGINEERING
(2023)
Article
Environmental Sciences
Zedi He, Qiongfang Wang, Pinhua Rao, Lei Dong, Min Zhang, Xin Zhang, Naiyun Gao, Jing Deng
Summary: This study investigates the degradation of SCP in the PS/WS2/Fe(III) system using WS2 as a co-catalyst, and systematically studies the factors influencing the degradation. The experimental results demonstrate that the PS/WS2/Fe(III) system can effectively degrade SCP under different conditions, and analyze the possible degradation pathways and types of free radicals.
SCIENCE OF THE TOTAL ENVIRONMENT
(2022)
Article
Green & Sustainable Science & Technology
Tiantian Ye, Lihong Liu, Yilin Wang, Jianqiang Zhang, Zhenxing Wang, Cong Li, Haoyu Luo
Summary: In this study, an innovative method using a hand warmer and persulfate (PS) was investigated for the degradation of Rhodamine B. The hand warmer showed better catalytic performance and reusability compared to other processes. The iron in the hand warmer played the main role in catalyzing PS, and the presence of activated carbon, salt, and H+/OH- accelerated the reaction. The catalyst of the hand warmer also demonstrated excellent stability with low iron leaching, making it a promising and environmentally friendly choice for dye removal in industrial wastewater.
Article
Environmental Sciences
Taher Selmi, Ghizlane Enaime, Aida Kesraoui, Abdelaziz Bacaoui, Mongi Seffen
Summary: This study explored the use of Agave americana fibers for the preparation of activated carbon via chemical activation with phosphoric acid, and investigated the effects of preparation conditions on the adsorption capacity towards Alpacide Yellow. The optimal conditions for enhanced properties were found to be an impregnation ratio of 40 g/1 g, impregnation time of 6 h, and carbonization temperature of 400 degrees C. Despite its lower specific surface area compared to commercial activated carbon, the prepared activated carbon exhibited higher adsorption capacity due to the presence of pores and functional groups on its surface. The adsorption process followed a fractal kinetic model, while the adsorption isotherm model was stochastic.
ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
(2021)
Article
Engineering, Environmental
Cheolyong Kim, Torsten C. Schmidt, Holger V. Lutze
Summary: This study investigated the kinetics and stoichiometry of bromide oxidation in the heat-activated persulfate process. It was found that the reaction of sulfate radical with persulfate may become more important at elevated temperatures. Additionally, the polymerization of phenol and the formation of bromate were also affected.
CHEMICAL ENGINEERING JOURNAL
(2022)
Article
Engineering, Environmental
Min Huang, Xiaolei Wang, Cun Liu, Guodong Fang, Juan Gao, Yujun Wang, Dongmei Zhou
Summary: Metal sulfides have been found to enhance pollutant degradation in persulfate oxidation processes by accelerating Fe(III)/Fe(II) redox cycles on their surfaces, leading to increased generation of sulfate and hydroxyl radicals for improved performance in environmental remediation.
JOURNAL OF HAZARDOUS MATERIALS
(2021)
Article
Engineering, Chemical
Mojtaba Forouzesh, Amanollah Ebadi, Fahime Abedini
Summary: The study found that alkaline media promoted the removal of MTZ during thermocatalytic oxidation, indicating the effectiveness of PS activation in degrading MTZ. Under optimal conditions, over 95% of MTZ was degraded, with sulfate and hydroxyl radicals playing a major role in the degradation process, and low copper leaching observed.
SEPARATION AND PURIFICATION TECHNOLOGY
(2021)
Article
Environmental Sciences
Zhongwei Zhou, Hao Cheng, Sridhar Komarneni, Jianfeng Ma
Summary: MIL-101(Fe)/WS2 catalyst was synthesized using a solvothermal method. The physical and chemical properties of the composite material were studied using various characterizations. The photocatalysis of the catalyst in the degradation of tetracycline under visible light illumination was investigated using persulfate as a cocatalyst. The catalyst showed high efficiency in removing tetracycline, with a removal rate of over 80% within 40 minutes. The material also demonstrated good recycling capability after multiple cyclic experiments. The enhanced performance of the catalyst was attributed to the reduction of photogenerated electron-hole recombination efficiency and the activation of persulfate to produce free radicals.
ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
(2023)
Article
Chemistry, Multidisciplinary
Elizaveta Sterenzon, Vinod Kumar Vadivel, Yoram Gerchman, Thomas Luxbacher, Ramsundram Narayanan, Hadas Mamane
Summary: The study demonstrates that pine tree-derived biochar is effective in removing AV dye, and monitoring the effluent ratio can enhance colorant removal efficiency. The Langmuir isotherm model best fits the adsorption of AV onto biochar.
Article
Environmental Sciences
Francis Addison, Nnanake-Abasi Offiong, Qilin Han, Ruofan Wang, Na Liu
Summary: In this study, the influence of nitrogen-doped and non-doped mesoporous carbon materials (NCMK-3 and CMK-3) on the persulfate (PS) oxidation of 4-chlorophenol (4CP) in water was investigated. The results showed that both NCMK-3 and CMK-3 facilitated the removal of 4CP from water. NCMK-3 exhibited better performance compared to CMK-3. NCMK-3 influenced the thermodynamic process and exhibited a synergistic effect in the removal of the organic contaminant from water.
ENVIRONMENTAL TECHNOLOGY
(2022)
Article
Environmental Sciences
Ammara Ahmed, Jinxin Wang, Wenmin Wang, Chioma Joy Okonkwo, Na Liu
Summary: Two kinds of Mg-Al-layered double hydroxides (LDH-1 and 2) were synthesized and used to adsorb PFOA from aqueous solution. The removal rates of PFOA adsorption by LDH-1 and LDH-2 were 90% and 98.9%, respectively, in the lowest time compared with similar past studies using different adsorbents. The research demonstrates the potential of employing synthesized LDHs in a fixed-bed filter for the environmental remediation of PFOA-contaminated wastewater bodies.
ENVIRONMENTAL TECHNOLOGY
(2022)
Article
Agricultural Engineering
Kesinee Iamsaard, Chih-Huang Weng, Li-Ting Yen, Jing-Hua Tzeng, Chakkrit Poonpakdee, Yao-Tung Lin
Summary: This study provides direct evidence on the adsorption mechanisms of Ni(II), Zn(II), and Cu(II) on pineapple leaf biochar (PLB) through surface characteristics analyses, and proposes cation release, cation exchange, and surface complexation mechanisms. The PLB shows high regenerability and ultrahigh adsorption capacity, making it a promising adsorbent for metal-laden wastewater treatment in future applications.
BIORESOURCE TECHNOLOGY
(2022)
Article
Environmental Sciences
Tingchen Cui, Peng Wang, Jialu Li, YaoMing Su, Na Liu, Mei Hong
Summary: Strain NB-1, identified as Pseudomonas frederiksbergensis, efficiently degrades nitrobenzene and shows high adaptability to cold and alkaline conditions. Response surface methodology using the Haldane-Andrews model was applied to guide the treatment of nitrobenzene wastewater by NB-1, optimizing the growth conditions under different nitrobenzene concentrations.
ENVIRONMENTAL TECHNOLOGY
(2023)
Article
Engineering, Environmental
Li-Ting Yen, Chih-Huang Weng, Nhu Anh Thi Than, Jing-Hua Tzeng, Astrid R. Jacobson, Kesinee Iamsaard, Van Dien Dang, Yao-Tung Lin
Summary: This study characterized the mode of inactivation of S. aureus and E. coli via biocalcium oxide (BCO) using various microscopy and spectroscopy techniques. The results demonstrated that BCO altered bacterial cell permeability, leading to sustained inactivation. BCO exhibited superior disinfection capacity compared to other shell-derived disinfectants, making it a cost-effective option for pathogen control.
CHEMICAL ENGINEERING JOURNAL
(2022)
Article
Engineering, Environmental
Jing-Hua Tzeng, Chih-Huang Weng, Che-Jui Chang, Li-Ting Yen, Mark Daniel G. de Luna, Jenn-Wen Huang, Yao-Tung Lin
Summary: This study demonstrates the highly efficient deactivation of pathogenic C. albicans using nitrogen-schorl co-modified TiO2 under visible-light irradiation, providing insights into the critical factors and a prediction model for photocatalyst performance on C. albicans deactivation.
CHEMICAL ENGINEERING JOURNAL
(2022)
Article
Engineering, Chemical
Jian-An Su, Cheng-Chia Huang, Cheng-Liang Huang, Yao-Tung Lin, Yuan-Yao Li
Summary: This study synthesized activated microporous carbon spheres and nitrogen-doped activated microporous carbon spheres using a modified Stober method and CO2 activation. The materials exhibited high specific area and tunable sphere diameters. The supercapacitor study demonstrated that these materials achieved high specific capacitances and energy densities in different electrolytes, with good cycling stability.
CHEMICAL ENGINEERING RESEARCH & DESIGN
(2022)
Article
Environmental Sciences
Li-Hao Young, Wan-Yi Chen, Chun-Chieh Wang, Mau-Tsu Tang, Shao-Chin Tseng, Bi-Hsuan Lin, Chau-Wei Lai, Yu -Han Chen, Tzu-Ting Yang, Yao-Tung Lin
Summary: A new synchrotron-based transmission X-ray microscopy (TXM) method has been developed to visualize the 3D internal chemical mixing state and structure of single particles. The TXM is more applicable to imaging solid particles containing high-density elements and larger sizes. The derived 3D information provides insights into the complex internal mixing state and structure of aerosol particles.
Article
Environmental Sciences
Mari Elancheziyan, Sivarasan Ganesan, K. Theyagarajan, Murugesan Duraisamy, Kathavarayan Thenmozhi, Chih-Huang Weng, Yao-Tung Lin, Vinoth Kumar Ponnusamy
Summary: The design and development of inexpensive, portable, and eco-friendly electrochemical non-enzymatic sensors is crucial in the field of analytical chemistry. In this study, a highly porous nanocomposite material was developed for efficient detection of rutin, a type of vitamin P. The material exhibited excellent conductivity and electrocatalytic characteristics, and a sensor based on this material was successfully used for real-time detection of rutin in various samples.
ENVIRONMENTAL RESEARCH
(2022)
Article
Environmental Sciences
Haijun Li, Na Liu
Summary: This study investigated the degradation performance of persulfate (PS) based advanced oxidation processes (AOPs) using FeS as the activator (FeS/PS) for the removal of tetracycline (TC). The results showed that TC was effectively removed within 60 min with optimal PS and FeS concentrations. FeS exhibited excellent stability and recyclability as a PS activator for TC removal.
ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
(2023)
Article
Environmental Sciences
Tengyan Wu, Xiang Li, Chih-Huang Weng, Feng Ding, Fengliang Tan, Renyan Duan
Summary: In this study, perovskite-structured catalysts LaMO3 (M = Co, Fe) were synthesized and used to catalyze the degradation of the carcinogenic dye Direct Blue 86 (DB86) using hydrogen peroxide (H2O2). The LaCoO3-catalyzed H2O2 process showed higher oxidative power than LaFeO3/H2O2. The LaCoO3/H2O2 system could completely degrade 100 mg/L of DB86 within 5 minutes under specific conditions. The LaCoO3 catalyst was shown to be reusable and maintained its efficiency even after multiple uses.
ENVIRONMENTAL RESEARCH
(2023)
Article
Chemistry, Physical
Chih-Huang Weng, Chong-Yi Liao, Jing-Hua Tzeng, Ying-Chen Chen, Jin Anotai, Yao-Tung Lin
Summary: Developing oxygen vacancies in nanomaterials is an effective method to enhance catalytic performance. In this study, a novel low-cost ternary iron-manganese-copper mixed oxide catalyst with abundant oxygen vacancies was successfully synthesized. Characterization analyses revealed the metal valence transformation, synergy structure, and role of oxygen vacancies in the catalyst, demonstrating its excellent catalytic oxidation performance. The stable and active structure of the catalyst after oxidizing ethylene suggests a redox cycle of catalytic mechanism. This work provides valuable insights into the development of high-performance and stable catalysts with abundant oxygen vacancies for VOCs elimination.
APPLIED SURFACE SCIENCE
(2023)
Article
Agricultural Engineering
Kesinee Iamsaard, Chih-Huang Weng, Jing-Hua Tzeng, Jin Anotai, Astrid R. Jacobson, Yao-Tung Lin
Summary: Many industrial wastewaters contain toxic copper that needs proper treatment before discharging. This study investigated the critical pyrolysis parameters of biochar derived from agricultural waste. Optimized biochar showed high Cu(II) adsorption capacity and surface characterization confirmed removal mechanisms. Optimized biochar also demonstrated high reusability after regeneration.
BIORESOURCE TECHNOLOGY
(2023)
Article
Multidisciplinary Sciences
Chakkrit Poonpakdee, Khabele Z. Ntlopo, Jumpen Onthong, Khwunta Khawmee, Yao-Tung Lin
Summary: Magnesium (Mg) is crucial for plant biochemical processes, but tropical Ultisols soils often have low Mg levels. Magnesium is often overlooked in fertilization programs and the right application rates are still uncertain. This study found that applying 50-100 mg Mg/kg of magnesium fertilizer improved plant growth and nutrient uptake in soybean and sunflower, while excessive application suppressed biomass and nutrient accumulation. Therefore, it is recommended to apply 50-100 mg Mg/kg of magnesium fertilizer for optimum plant growth and efficiency in tropical Ultisols soils with low extractable Mg.
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)
