Article
Chemistry, Physical
Zoe Gromotka, Gregory Yablonsky, Nickolay Ostrovskii, Denis Constales
Summary: New theoretical relationships for a complex catalytic reaction accompanied by deactivation are obtained in this study. It is found that the catalyst lifetime can be enhanced by decreasing the steady-state concentration of free active sites or by increasing the steady-state reaction rate of the fresh catalyst. These theoretical results are validated through computer simulations.
Article
Environmental Sciences
Mohsen Nowrouzi, Hajar Abyar, Sohrab Rohani
Summary: The study compares nitrogen removal systems (NRSs) from various perspectives and finds that the sequential batch reactor (SBR) configuration shows the best efficiency (98.74%) for nitrogen removal. The operation of NRSs has the most impact on human health (63.67%) through CH4 and CO2 emissions. The exergetic efficiency of the system is 69%, predominantly supplied by biogas (around 50.75%).
SCIENCE OF THE TOTAL ENVIRONMENT
(2023)
Article
Engineering, Chemical
Xi Li, Wenwen Zhang, Zhenxue Liu, Shiwen Wang, Xiao Zhang, Baokang Xu, Peng Yu, Yanhua Xu, Yongjun Sun
Summary: Co-based heterogeneous catalysts show high performance in peroxymonosulfate (PMS) activation for antibiotic pollution control in water. However, their aggregation and loss of active components limit their application. In this study, a 3D rose-like MoS2 was synthesized to anchor Co in its special lamellar structure, resulting in high dispersion. 98.9% of tetracycline (TC) was removed within 60 min under neutral conditions. The key to PMS activation and TC degradation was the accelerated valence cycle between Co2+ and Co3+. The lamellar structure of MoS2 provided better stability and inhibited Co leaching.
SEPARATION AND PURIFICATION TECHNOLOGY
(2022)
Article
Environmental Sciences
Pia Schumann, Dario Mueller, Paulina Eckardt, Matthias Muschket, Daniel Dittmann, Luisa Rabe, Kristin Kerst, Andre Lerch, Thorsten Reemtsma, Martin Jekel, Aki Sebastian Ruhl
Summary: The fate of persistent and mobile substances in drinking water treatment needs further investigation. This study evaluates the effectiveness of fixed-bed granular activated carbon (GAC) filters in removing these substances and predicts their elimination based on lab-scale experiments. Nine substances were predominantly present in the drinking water and their breakthrough behaviors were observed. The removal performances and characteristics of GAC were found to be comparable to the presence of specific substances.
SCIENCE OF THE TOTAL ENVIRONMENT
(2023)
Article
Engineering, Environmental
Xiaoqing Lin, Longqian Xu, Zhenyu Zhao, Shanshan Liu, Jiaming Zhang, Deli Wu
Summary: Low electron-transfer efficiency and cumbersome processes greatly hinder the application of Fe-based materials for treating electroplating wastewater. This study successfully synthesized ferrous/ferric hydroxide complex (FHC) which greatly improved the electron-transfer efficiency for Cr(VI) removal. The sulfate interlayer of FHC was found to strongly promote Cr(VI) removal, showing potential for enhancing the reactivity of FHCs in remediating Cr(VI)-contaminated electroplating wastewater.
CHEMICAL ENGINEERING JOURNAL
(2023)
Article
Chemistry, Physical
Christos Lykos, Sotirios Sioulas, Ioannis Konstantinou
Summary: The presence of pharmaceuticals in water is a significant problem due to their potential adverse effects on aquatic organisms and humans. Conventional wastewater treatment plants are insufficient in removing these compounds, leading to the development of new techniques such as photocatalysis. This study investigated the use of graphitic carbon nitride as a photocatalyst to remove the antibiotic metronidazole. The results showed efficient removal of the antibiotic, the identification of transformation products, and the reduction of ecotoxicity. Further research is needed to optimize the catalyst's performance and conditions for full-scale applications.
Article
Engineering, Environmental
K. Kowalska, M. Roccamante, A. Cabrera Reina, P. Plaza-Bolanos, I. Oller, S. Malato
Summary: This study demonstrated the high removal efficiency of microcontaminants by solar-driven photo-Fenton at lab and pilot scale, with up to 97% removal efficiency achievable through optimization of operating parameters.
JOURNAL OF ENVIRONMENTAL CHEMICAL ENGINEERING
(2021)
Article
Environmental Sciences
David Pryce, Fatemah Alsharrah, Ahmed M. E. Khalil, Zoran Kapelan, Fayyaz A. Memon
Summary: Emerging contaminants pose a threat to the ecosystem, but graphene-based materials like Graphene Oxide show significant advantages in terms of life-cycle costs and eco-efficiency compared to alternative technologies. Among these materials, the Graphene-oxide foam adsorbent demonstrated the greatest improvement in terms of both cost and environmental impact.
Article
Green & Sustainable Science & Technology
Bing Zhang, Yinhong Lu, Xiangbo Luo, Wei Wang, Jianying Huang, Yuekun Lai, Yuping Wang, Yi Zhang, Weilong Cai
Summary: In this study, a functional catalytic bag-filter material (CBFM) was fabricated from commercial PTFE felt and cheap catalyst V2O5-WO3/TiO2 via a simple immersion-fixation procedure. The CBFMs exhibited superior denitration activities and almost complete dust removal, confirming their stability and applicability in industrial settings.
JOURNAL OF CLEANER PRODUCTION
(2023)
Review
Environmental Sciences
Jamiu O. O. Eniola, Banu Sizirici, Yohanna Fseha, Jamal F. Shaheen, Ahmed Mamdouh Aboulella
Summary: The impact of water pollution has led to the development of cost-effective and environmentally friendly treatment methods. Adsorption using low-cost adsorbents like industrial by-products and waste has been identified as an advanced treatment technology. This paper highlights different synthesis routes for modifying low-cost adsorbents to improve their removal efficiencies, and provides information on their applications in pollutant removal. Future research should focus on fabricating hybrid low-cost adsorbents with multifunctional and antimicrobial properties, and conducting life cycle assessments to evaluate the environmental impacts of their modification.
ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
(2023)
Article
Engineering, Chemical
B. Silva, V Rocha, A. Lago, F. Costa, T. Tavares
Summary: This study addressed the treatment of a complex industrial effluent containing high concentrations of metals and organic solvents using an eco-friendly approach. The results showed that Sepiolite preferred DEK over MEK, and the presence of biofilm improved the removal of heavy metals.
SEPARATION AND PURIFICATION TECHNOLOGY
(2021)
Review
Environmental Sciences
Maria Antonopoulou, Christina Kosma, Triantafyllos Albanis, Ioannis Konstantinou
Summary: Pharmaceutical Active Compounds (PhACs) have been considered emerging contaminants due to their continuous release and persistent presence in aquatic environments. Research has shown the occurrence of PhACs in wastewater treatment plant influents, hospital effluents, and surface waters worldwide. Homogeneous and heterogeneous photocatalytic applications have been extensively studied for the removal of PhACs, with consideration of their efficiency, operational costs, and potential combination with other processes.
SCIENCE OF THE TOTAL ENVIRONMENT
(2021)
Article
Chemistry, Multidisciplinary
Shiyu Wang, Jhuma Sadhukhan, Jin Xuan, Yanjuan Yu, Xuhui Mao, Mingliang Wang, Xiaofei Chen, Xiaoguo Zhou, Lei Xing, Xu Wang
Summary: Numerous AOPs have been developed for sewage sludge conditioning, but their environmental and economic impacts differ due to the use of different chemical reagents. This study compared the LCA and LCC of three AOPs with a traditional conditioner to measure their environmental and economic performance. Fe2+/Ca(ClO)2 had the highest burden, while Fe2+/H2O2 had the lowest. Sludge conditioning and landfill stages were the major contributors to environmental impact and economic cost. Dewatering performance did not result in significant environmental benefits.
ACS SUSTAINABLE CHEMISTRY & ENGINEERING
(2023)
Article
Chemistry, Physical
Efthimia Kaprara, Charalampos Belesakos, Konstantinos Kollis, Savvina Psaltou, Anastasios Zouboulis, Manassis Mitrakas
Summary: The study evaluates the removal of micropollutants from water/wastewater contaminated sources using a pilot-scale continuous operation unit with a membrane module and a contact reactor system. Different solid materials as catalysts have different effects on the removal of micropollutants, and parameters such as catalyst concentration, pH, temperature, and process time also influence the removal efficiency.
Article
Chemistry, Physical
Bernay Cifuentes, Alejandro Cifuentes, Felipe Bustamante, Lluis Soler, Jordi Llorca, Martha Cobo
Summary: CO removal from syngas was evaluated using structured AuCu/CeO2-SiO2 catalysts in a single catalytic unit. Addition of SiO2 into AuCu/CeO2 increased surface area and reduced cost, but decreased CO conversion. Washcoated AuCu/CeO2-SiO2 catalyst on monolith outperformed powder samples at temperatures above 260°C, showing potential for economic H-2 cleanup processes.
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
(2021)
Article
Chemistry, Multidisciplinary
Xuemei Liu, Chaonan Cui, Shuoshuo Wei, Jinyu Han, Xinli Zhu, Qingfeng Ge, Hua Wang
Summary: This study presents a new strategy for designing efficient photocatalysts that can convert CO2 into hydrocarbons by utilizing synergistic catalytic sites. The findings provide a solution for the selective photocatalytic reduction of CO2 to CH4.
Article
Chemistry, Multidisciplinary
Chengxian Hu, Dan Wang, Lu Wang, Ying Fu, Zhengyin Du
Summary: A novel one-pot, three-component reaction conducted under electrochemical conditions was studied. The reaction involved 2-aminothiophenols, aldehydes, and malononitrile, using TBABF4 as an electrolyte and CuI as a catalyst. The proposed reaction mechanism suggested that CuI served as an electron relay. This method offers simplified operation, high atom economy, and mild reaction conditions.
Article
Chemistry, Multidisciplinary
Zhi Yang, Yu Chen, Linxi Wan, Yuxiao Li, Dan Chen, Jianlin Tao, Pei Tang, Fen-Er Chen
Summary: A highly enantioselective method for the complete hydrogenation of pyrimidinium salts using Ir/(S,S)-f-Binaphane complex as the catalyst was developed. This method provides easy access to fully saturated chiral hexahydropyrimidines, which are prevalent in many bioactive molecules. The reactions exhibit high yields and enantioselectivities under mild reaction conditions without additives. Successful application of this methodology in a continuous flow fashion further extends its practical utility.
Article
Chemistry, Multidisciplinary
Tina Jeoh, Jennifer Danger Nill, Wujun Zhao, Sankar Raju Narayanasamy, Liang Chen, Hoi-Ying N. Holman
Summary: In this study, the enzymatic hydrolysis of cellulose was investigated using real-time infrared spectromicroscopy. The spatial heterogeneity of cellulose was found to impact the hydrolysis kinetics. Hydration affected cellulose ordering, and Cel7A preferentially removed less extensively hydrogen bonded cellulose.
Article
Chemistry, Multidisciplinary
Tiphaine Richard, Walid Abdallah, Xavier Trivelli, Mathieu Sauthier, Clement Dumont
Summary: An effective method of grafting functionalities onto lignin based on glycerol carbonate has been developed using an efficient nickel-catalysed telomerisation reaction. This method allows lignin to have new reactive functions and reduces the glass transition temperatures of modified lignins, thereby expanding the application range of lignin-based resins.
Article
Chemistry, Multidisciplinary
Jing Qi, Xiyan Wang, Gan Wang, Srinivas Reddy Dubbaka, Patrick ONeill, Hwee Ting Ang, Jie Wu
Summary: This study presents a green and environmentally friendly approach for the synthesis of imides using electrocatalytic oxidation with H2O as the oxygen source. The method eliminates the need for toxic or expensive oxidants and achieves high yields under mild reaction conditions. It shows broad substrate compatibility and potential for industrial applications.
Article
Chemistry, Multidisciplinary
Babasaheb Sopan Gore, Lin-Wei Pan, Jun-Hao Lin, Yi-Chi Luo, Jeh-Jeng Wang
Summary: Here, we report a visible light-promoted intramolecular radical cascade reaction for the construction of fluorenol and naphthalene-fused cyclopropyl carbaldehyde derivatives. This method offers mild reaction conditions, a broad substrate scope, excellent step efficiency, and scalability, without the need for external chemical oxidants. The novelty of this protocol was demonstrated by synthesizing chrysene analogs and performing late-stage functionalizations.
Article
Chemistry, Multidisciplinary
Juho Antti Sirvio, Idamaria Romakkaniemi, Juha Ahola, Svitlana Filonenko, Juha P. Heiskanen, Ari Ammala
Summary: This article discusses the method of using supramolecular interaction between an aromatic hydrogen bond donor and lignin to achieve rapid delignification of softwood at low temperatures.
Article
Chemistry, Multidisciplinary
Yunyan Meng, Chunxiang Pan, Na Liu, Hongjiang Li, Zixiu Liu, Yao Deng, Zixiang Wei, Jianbin Xu, Baomin Fan
Summary: A novel visible light-driven synthesis method for 2,3-diamines has been developed, which has mild conditions, avoids the use of metal reagents, and can synthesize diamines and diols in one pot.
Article
Chemistry, Multidisciplinary
Mingqing Huang, Haiyang Huang, Mengyao You, Xinxin Zhang, Longgen Sun, Chao Chen, Zhichao Mei, Ruchun Yang, Qiang Xiao
Summary: A direct air-oxidized strategy for the synthesis of benzo[b]phosphole oxides was developed in this study. Arylphosphine oxides were transformed into phosphinoyl radicals, which were further combined with various alkynes to achieve the desired products. DFT calculations revealed the mechanism of phosphinoyl radical formation.
Article
Chemistry, Multidisciplinary
Anwei Wang, Jiayin Huang, Chunsheng Zhao, Yu Fan, Junfeng Qian, Qun Chen, Mingyang He, Weiyou Zhou
Summary: This study demonstrates an innovative strategy for the aerobic oxidation of C(sp(3))-H bonds using gamma-valerolactone. By optimizing the reaction conditions and utilizing specific catalysts, efficient oxidation of C(sp(3))-H bonds is achieved with good chemoselectivity in certain cases.
Article
Chemistry, Multidisciplinary
Shun Li, Likai Tong, Zhijian Peng, Bo Zhang, Xiuli Fu
Summary: Sulfide compounds show promise as electrocatalysts for water splitting, but their performance is limited by factors such as limited active sites and hindered substance transport. This study successfully prepared a high-entropy sulfide (ZnCoMnFeAlMg)(9)S-8, which reduced grain size and increased specific surface area, enabling the realization of a dual-functional catalyst with multiple catalytic sites. High entropy also modulated the electronic properties of sulfides, reducing the potential energy barrier for hydrolysis. This research introduces a new approach for functionalizing high entropy nanomaterials and improves the performance of water splitting catalysts.