Article
Engineering, Environmental
Wenbo Yu, Haoran Duan, Zhiyao Wang, Jiakuan Yang, Zhiguo Yuan, Min Zheng
Summary: This study proposes an optimal integrated strategy for recovery and carbon sink in anaerobically digested sludge management by considering low-valued recyclables recycling and non-recyclables reduction. Acid-elutriation effectively reduces the water content and volume of the sludge, improves its stability, and enhances the quality by removing metals. The study suggests potential opportunities for combining acid-elutriation with other treatment technologies to achieve enhanced dewatering performance.
RESOURCES CONSERVATION AND RECYCLING
(2022)
Article
Green & Sustainable Science & Technology
Haochi Zhang, Dejin Zhang, Yujun Zhou, Di Fang, Chunhong Cui, Jianru Liang, Bo Zhou, Mingjiang Zhang, Jiansheng Li, Lixiang Zhou
Summary: This study found that bioleaching was not effective for anaerobically digested sludge (ADS) compared to undigested sludge (UDS). The specific resistance to filtration of ADS increased during bioleaching, and the pH value of ADS remained unchanged at 7.97, while it decreased to 2.98 for UDS. Added Fe2+ was not detected as an energy source for ADS. Higher alkalinity and unavailable Fe2+ in ADS hindered the growth of Acidithiobacillus species. Aeration significantly deteriorated the dewaterability of ADS through bioleaching, with a drastic increase in sludge pH and slime EPS content.
Review
Engineering, Environmental
Zhiyao Wang, Tao Liu, Haoran Duan, Yarong Song, Xi Lu, Shihu Hu, Zhiguo Yuan, Damien Batstone, Min Zheng
Summary: The study reviewed the current status and challenges of post-treatment technologies for anaerobically digested sludge, proposing a multi-target approach to achieve sludge volume reduction, stabilization, and metal solubilization. The authors suggested developing more methods to promote AD sludge management towards a more economically favorable, socially acceptable, and environmentally sustainable direction.
Article
Green & Sustainable Science & Technology
Chen Cai, Chongliang Hu, Wan Yang, Yu Hua, Lei Li, Donghai Yang, Xiaohu Dai
Summary: The study investigated the effects of post-thermal hydrolysis process (THP) temperature on methane yields, dewatering performance, and antibiotic resistance genes (ARGs) in sludge digestate. Results showed that temperatures above 160 degrees C were optimal, leading to increased methane yield, improved dewatering performance, and reduced abundance of ARGs. The energy balance analysis indicated that the AD-THP configuration could be a promising alternative for sustainable disposal of excess sludge, with a net energy output up to 372 kW.h/t DS.
JOURNAL OF CLEANER PRODUCTION
(2021)
Article
Green & Sustainable Science & Technology
Haixiao Guo, Lixin Tian, Yufen Wang, Tingting Zhu, Yindong Tong, Yiwen Liu
Summary: This study explores a new pretreatment strategy using beta-CD to enhance methane production and improve dewaterability of waste activated sludge in two-phase anaerobic digestion. Results show that beta-CD significantly increases methane yield and improves the solubilization and acidification processes of the sludge, as well as methane fermentation.
JOURNAL OF CLEANER PRODUCTION
(2022)
Article
Engineering, Environmental
Zheng Wu, Yang Bai, Yibo Zhang, Minwei Xie, Tao Huang, Shunsheng Yang, Daoping Peng
Summary: A novel strategy of iron and nitrogen co-doped biochar (Fe-N-BC) activated peroxydisulfate (PDS) was developed to improve anaerobically digested sludge (ADS) dewaterability. The Fe-N-BC-800/PDS treatment significantly reduced the Capillary suction time (CST) and moisture content (MC) of the ADS, indicating enhanced dewatering efficiency. Quantitative analysis revealed that oxidative reactions facilitated by Fe-N2-BC-800 played a crucial role in improving the dewaterability of ADS.
JOURNAL OF ENVIRONMENTAL CHEMICAL ENGINEERING
(2023)
Article
Biology
Mahmut Tepecik, Ali Riza Ongun, Huseyin Husnu Kayikcioglu, Sezai Delibacak, Omer Lutfu Elmaci, Ahmet Esen Celen, Emre Ilker
Summary: The application of treated municipal sewage sludge at different rates significantly increased cotton plant yield, especially at 30 t/ha. It also had a positive effect on the concentration of nutrients like nitrogen, phosphorus, and potassium in the plants.
SAUDI JOURNAL OF BIOLOGICAL SCIENCES
(2022)
Article
Engineering, Environmental
Zhiyao Wang, Gaofeng Ni, Jun Xia, Yarong Song, Shihu Hu, Zhiguo Yuan, Min Zheng
Summary: This study introduces a novel bioleaching approach for AD sludge, which utilizes microbial oxidation to achieve sludge acidification and efficiently extract heavy metals. The results enable the economical and safe reuse of excess sludge generated during biological wastewater treatment.
Article
Engineering, Environmental
Ting Li, Jiawei Yang, Yujun Zhou, Yixin Luo, Bo Zhou, Di Fang, Jiansheng Li, Lixiang Zhou
Summary: Bioleaching facilitated by iron-oxidizing bacteria is a promising and cost-effective method for sludge dewatering. Increasing the production of reactive oxygen species (ROS) through the introduction of H2O2 can significantly improve dewaterability and shorten the treatment time.
Article
Environmental Sciences
Ting Li, Jiawei Yang, Yujun Zhou, Xuan Liu, Yixin Luo, Di Fang, Jianru Liang, Jiansheng Li, Lixiang Zhou
Summary: In recent years, bioleaching has become a cost-effective technology for improving sludge dewaterability. This study developed a novel approach combining short-time bioleaching with polyferric sulfate flocculation, achieving comparable dewatering results to conventional long-time bioleaching. These findings provide new insights for developing efficient sludge dewatering strategies.
ENVIRONMENTAL RESEARCH
(2023)
Article
Energy & Fuels
Daegi Kim, Gabin Kim, Doo Young Oh, Kee-Won Seong, Ki Young Park
Summary: Sewage sludge production has been increasing globally due to the rise in the number of wastewater treatment plants. In this study, a pyrolysis method was used to generate energy from anaerobically digested sludge, with the microwave-assisted pyrolysis method proving to be faster and more efficient than conventional pyrolysis. The MWP method resulted in a significantly higher yield of H-2 gas compared to CP, and 800 degrees C was determined to be the optimal temperature for both methods.
Article
Engineering, Chemical
Weijun Zhang, Jun Chen, Mingyue Tang, Hanjun Wu, Ming Liu, Jing Ai, Dongsheng Wang
Summary: The CA-Fenton process significantly improved sludge dewatering performance and removal of antibiotic resistance genes (ARGs). The acidification of CA enhanced permeability of the EPS cell barrier, releasing intracellular ARGs into the sludge and accelerating their degradation, while also improving sludge dewaterability by destroying the secondary structure of proteins. This study not only proposed an efficient method for traditional Fenton oxidation in sludge treatment, but also provided a mechanistic basis for understanding the CA-Fenton process and enabling the harmless disposal of sludge.
SEPARATION AND PURIFICATION TECHNOLOGY
(2022)
Article
Environmental Sciences
Qi Lu, Qiang Liu, Xuran Liu, Yifu Li, Zhuo Yin, Dongbo Wang
Summary: Using acidic regulation to stimulate the release of indigenous enzymes is an efficient strategy to enhance the hydrolysis and dewatering of fermented sludge. The method destroys the structure of the sludge, accelerates the hydrolysis and acidification of extracellular polymeric substances, and improves the dewaterability of sludge particles.
JOURNAL OF ENVIRONMENTAL MANAGEMENT
(2022)
Article
Engineering, Environmental
Shun Zhang, Shiyu Miao, Xiaoqiang An, Huachun Lan, Ruiping Liu, Jianfeng Peng, Huijuan Liu, Jiuhui Qu
Summary: This study investigated the transformation process of typical components in sludge and found that the improvement of sludge dewaterability was due to the disruption of EPS and the release of intracellular substances. The oxidation of sulfides into sulfate by KMnO4 effectively inhibited the release of hazardous H2S, even at a low pH. Additionally, the interaction between Fe2+ and KMnO4 completely immobilized PO43- in the centrifugate.
RESOURCES CONSERVATION AND RECYCLING
(2021)
Article
Engineering, Environmental
Jiaqi Zhao, Chunsheng Qiu, Xiaodan Fan, Jinxin Zheng, Nannan Liu, Chenchen Wang, Dong Wang, Shaopo Wang
Summary: The pyrolysis of dewatered sewage sludge and anaerobically digested sludge resulted in biochars with increased heavy metal concentrations but decreased bioavailability fractions, thereby reducing environmental risk.
WATER SCIENCE AND TECHNOLOGY
(2021)
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.
Review
Green & Sustainable Science & Technology
Mokgehle R. Letsoalo, Thandiwe Sithole, Steven Mufamadi, Zvanaka Mazhandu, Mika Sillanpaa, Ajeet Kaushik, Tebogo Mashifana
Summary: The presence of pharmaceutical contaminants (PCs) in the environment, including water and aquatic life, is a continuous threat to human health and the natural cycle. In particular, the accumulation of non-degradable water-soluble residues in water streams and groundwater has raised serious concerns and is now a focus of the United Nations' Sustainable Development Goals 2030. This article explores the challenges and potential solutions for the selective detection and efficient remediation of PCs in wastewater using nano-enabled functional systems.
JOURNAL OF CLEANER PRODUCTION
(2023)
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
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
Biochemistry & Molecular Biology
Atef El Jery, Hayder Mahmood Salman, Rusul Mohammed Al-Khafaji, Maadh Fawzi Nassar, Mika Sillanpaa
Summary: Hydrogen production using polymer membrane electrolyzers is an effective method for generating environmentally friendly energy. The study analyzed the performance of the electrolyzers in the water electrolysis process and investigated the impact of variables such as radiation intensity and current density on hydrogen production. Machine-learning-based predictions were also conducted to forecast efficiency and hydrogen production rate in different scenarios.
Article
Green & Sustainable Science & Technology
Rajesh Babu Katiyar, Suresh Sundaramurthy, Anil Kumar Sharma, Suresh Arisutha, Moonis Ali Khan, Mika Sillanpaa
Summary: Urbanization and population growth lead to a substantial increase in solid waste generation. Vermicomposting, which employs earthworms to recycle solid waste, proves to be a sustainable solution. This study explores the impact of earthworm-processed solid waste manure (vermicompost) on the growth, productivity, and chemical characteristics of chili and brinjal plants in different wooden reactors. The findings reveal that polyculture reactors with vermicompost soil exhibit significantly higher yields of both chili and brinjal compared to monoculture reactors.
Article
Chemistry, Physical
Sadia Aroob, Sonia A. C. Carabineiro, Muhammad Babar Taj, Ismat Bibi, Ahmad Raheel, Tariq Javed, Rana Yahya, Walla Alelwani, Francis Verpoort, Khanita Kamwilaisak, Saleh Al-Farraj, Mika Sillanpaa
Summary: In this study, CuO nanoparticles were synthesized by a simple, one-pot mechanochemical approach using the leaf extract of Seriphidium oliverianum as a reducing and stabilizing agent. The CuO NPs showed high potential for degrading water-soluble industrial dyes, with degradation rates of 65.231% +/- 0.242 for methyl green (MG) and 65.078% +/- 0.392 for methyl orange (MO). This bio-mechanochemically synthesized CuO NPs are promising candidates for efficient dye removal from water.
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.
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
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)
Article
Biochemistry & Molecular Biology
Imran Ali, Anastasya Gaydukova, Tatiana Kon'kova, Zeid Abdullah ALOthman, Mika Sillanpaa
Summary: This study investigated the acid leaching process of grinding waste from a heat-resistant nickel alloy. Optimal conditions for acid dissolution were established to maximize the extraction of nickel, the main component of the alloy. These results are significant for industry professionals in metal recovery and environmentalists in waste treatment.
Article
Chemistry, Physical
Atef El Jery, Moutaz Aldrdery, Ujwal Ramesh Shirode, Juan Carlos Orosco Gavilan, Abubakr Elkhaleefa, Mika Sillanpaa, Saad Sh. Sammen, Hussam H. Tizkam
Summary: The shortage of water resources has led to extensive research in the development of effective and affordable wastewater treatment methods. In this study, a modified catalyst was synthesized using wet impregnation and the hydrothermal technique. The catalyst showed excellent performance in a heterogeneous quasi-electro-Fenton reaction and remained stable under different operational conditions. The findings of this study clarify the potential of the heterogeneous zeolite catalyst in wastewater treatment.
Article
Engineering, Environmental
Edris Rezaei, Behrouz Jafari, Mohsen Abbasi, Seyed Abdollatif Hashemifard, Shahriar Osfouri, Mahmoud Ramazani, Nadir Dizge, Mika Sillanpaa
Summary: The purpose of this study is to reuse greywater and prevent its release into the environment. The combined method of membrane and advanced oxidation was used to reduce the COD to the standard value. Ten types of membrane samples with different concentrations of kaolin, alumina, and calcium carbonate were prepared. The results showed that the addition of calcium carbonate increased the porosity and average pore size of the membrane.
JOURNAL OF ENVIRONMENTAL CHEMICAL ENGINEERING
(2023)
Article
Chemistry, Physical
Mohammad K. Okla, M. Kalil Rahiman, Mostafa A. Abdel-Maksoud, Ibrahim A. Alaraidh, Abdulrahman A. Alatar, Saud S. Al-amri, Hamada AbdElgawad, Mika Sillanpaa, S. Sudheer Khan
Summary: In this study, an n-p-n nanohybrid material was designed and synthesized, which consisted of ultrathin-Bi2WO6, CoFe2O4 nanosheets, spherical MnWO4, and carbon quantum dots. The experimental results demonstrated that the nanohybrid material exhibited excellent visible light absorption and efficient Cefixime photodegradation.
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
(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)
