Pub Date : 2024-10-17DOI: 10.1016/j.jece.2024.114380
Weiqi Wang , Jiamu Cao , Rongji Zhang , Liang Chen , Yang Li , Yufeng Zhang
Semiconductor sensors have great potential in real-time monitoring ammonia emissions in agriculture owing to mall volume, low cost, real-time response and no manual operation. However, the power consumption of semiconductor sensors needs to be further reduced in order to be applicable to smart agriculture. Herein, to provide a basis for researcher to develop high-performance ammonia sensors, this review article summarizes key design strategies of semiconductor sensors to improve the ammonia sensing properties. Besides, to significantly reduce the gas sensors' power consumption, a novel design strategy of sensors based on gas molecule trigging with ultra-low power consumption is also discussed in detail. The current challenges and future opportunities of semiconductor ammonia sensors are put forward finally. The review aims to provide researchers with ideas to develop semiconductor ammonia sensors owing high performance and ultra-low power consumption and encourage the application of these sensors in future smart agriculture.
{"title":"Design strategies of semiconductor sensors toward ammonia monitoring in smart agriculture","authors":"Weiqi Wang , Jiamu Cao , Rongji Zhang , Liang Chen , Yang Li , Yufeng Zhang","doi":"10.1016/j.jece.2024.114380","DOIUrl":"10.1016/j.jece.2024.114380","url":null,"abstract":"<div><div>Semiconductor sensors have great potential in real-time monitoring ammonia emissions in agriculture owing to mall volume, low cost, real-time response and no manual operation. However, the power consumption of semiconductor sensors needs to be further reduced in order to be applicable to smart agriculture. Herein, to provide a basis for researcher to develop high-performance ammonia sensors, this review article summarizes key design strategies of semiconductor sensors to improve the ammonia sensing properties. Besides, to significantly reduce the gas sensors' power consumption, a novel design strategy of sensors based on gas molecule trigging with ultra-low power consumption is also discussed in detail. The current challenges and future opportunities of semiconductor ammonia sensors are put forward finally. The review aims to provide researchers with ideas to develop semiconductor ammonia sensors owing high performance and ultra-low power consumption and encourage the application of these sensors in future smart agriculture.</div></div>","PeriodicalId":15759,"journal":{"name":"Journal of Environmental Chemical Engineering","volume":"12 6","pages":"Article 114380"},"PeriodicalIF":7.4,"publicationDate":"2024-10-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142532477","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2024-10-16DOI: 10.1016/j.jece.2024.114478
Lucia Pera , Marta Gandiglio , Paolo Marocco , Davide Pumiglia , Massimo Santarelli
Biogas represents a renewable and controllable energy source. Although predominantly composed of methane and carbon dioxide, it also contains various trace contaminants that can be detrimental to the technologies used for its conversion.
The aim of this work is to comprehensively explore trace contaminants in biogas. The assessment employs a two-level approach: an extensive literature review on biogas trace contaminants, complemented with on-site analyses from real-scale biogas plants to enhance and validate the literature findings. The biogas contaminants – sulphur compounds, siloxanes, halocarbons and aromatic compounds – are quantified and categorised into four distinct groups: landfill gas, agricultural gas, gas derived from the organic fraction of municipal solid waste (OFMSW), and gas from wastewater (WWTP). This study also provides contaminant effects and required thresholds for different biogas conversion technologies, including internal combustion engines, upgrading to biomethane, and innovative solid oxide fuel cells (SOFCs).
The two-level analysis reveals significant variability in contaminant levels across different biogas sources, with H2S being the most prevalent contaminant, averaging between 181 (WWTP) and 901 ppm (landfill gas). Other sulphur compounds show the highest average concentration in biogas from OFMSW (98 ppm), followed by agricultural and landfill gases. Siloxanes are typically more abundant in biogas from WWTP (2.55 ppm), while landfill gas exhibits the highest average concentrations of halocarbons and aromatic compounds (6 ppm and 109 ppm, respectively). Moreover, this study highlights the need for in-depth measurements of contaminants for highly sensitive technologies, such as SOFCs, to properly design tailored contaminant removal solutions.
{"title":"Trace contaminants in biogas: Biomass sources, variability and implications for technology applications","authors":"Lucia Pera , Marta Gandiglio , Paolo Marocco , Davide Pumiglia , Massimo Santarelli","doi":"10.1016/j.jece.2024.114478","DOIUrl":"10.1016/j.jece.2024.114478","url":null,"abstract":"<div><div>Biogas represents a renewable and controllable energy source. Although predominantly composed of methane and carbon dioxide, it also contains various trace contaminants that can be detrimental to the technologies used for its conversion.</div><div>The aim of this work is to comprehensively explore trace contaminants in biogas. The assessment employs a two-level approach: an extensive literature review on biogas trace contaminants, complemented with on-site analyses from real-scale biogas plants to enhance and validate the literature findings. The biogas contaminants – sulphur compounds, siloxanes, halocarbons and aromatic compounds – are quantified and categorised into four distinct groups: landfill gas, agricultural gas, gas derived from the organic fraction of municipal solid waste (OFMSW), and gas from wastewater (WWTP). This study also provides contaminant effects and required thresholds for different biogas conversion technologies, including internal combustion engines, upgrading to biomethane, and innovative solid oxide fuel cells (SOFCs).</div><div>The two-level analysis reveals significant variability in contaminant levels across different biogas sources, with H<sub>2</sub>S being the most prevalent contaminant, averaging between 181 (WWTP) and 901 ppm (landfill gas). Other sulphur compounds show the highest average concentration in biogas from OFMSW (98 ppm), followed by agricultural and landfill gases. Siloxanes are typically more abundant in biogas from WWTP (2.55 ppm), while landfill gas exhibits the highest average concentrations of halocarbons and aromatic compounds (6 ppm and 109 ppm, respectively). Moreover, this study highlights the need for in-depth measurements of contaminants for highly sensitive technologies, such as SOFCs, to properly design tailored contaminant removal solutions.</div></div>","PeriodicalId":15759,"journal":{"name":"Journal of Environmental Chemical Engineering","volume":"12 6","pages":"Article 114478"},"PeriodicalIF":7.4,"publicationDate":"2024-10-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142532538","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2024-10-16DOI: 10.1016/j.jece.2024.114454
Cheng-Yi Li , Shen-Wei Chu , Chia-Yun Ho , Han-Jung Chang , Terng-Jou Wan
Ammonia, such as ammonium sulfate and urea, is crucial for fertilizers and the chemical industry in reducing agents and refrigerants. Additionally, ammonia is a promising carbon-free fuel due to its safety and established transportation and storage methods. The Haber-Bosch process, the primary method for ammonia synthesis, is energy-intensive and emits significant greenhouse gases. This process involves the reaction of nitrogen and hydrogen over a catalyst at high temperatures and pressures. With global carbon reduction goals for 2050, renewable energy sources like wind and solar are gaining importance. Therefore, the electrochemical synthesis of 'green ammonia' using renewable energy is a vital research direction.
This article undertook a meticulous analysis of 1298 journal documents related to ammonia synthesis, sifting through them to identify 172 relevant articles. Key terms such as electrochemical, ammonia synthesis, catalyst, electrode, and green ammonia were meticulously identified using NVivo tools. The research delves into the intricacies of electrochemical nitrogen reduction reaction (eNRR) pathways, nitrogen and hydrogen sources, temperature conditions, catalysts, electrodes, and electrolytes. By conducting a comprehensive comparison of the energy consumption and carbon emissions of various green ammonia synthesis processes, the study aims to pinpoint the optimal parameters for mainstream green ammonia synthesis, thereby providing a robust reference for future developments.
{"title":"A comprehensive review of critical factors affecting green ammonia synthesis by electrochemical process","authors":"Cheng-Yi Li , Shen-Wei Chu , Chia-Yun Ho , Han-Jung Chang , Terng-Jou Wan","doi":"10.1016/j.jece.2024.114454","DOIUrl":"10.1016/j.jece.2024.114454","url":null,"abstract":"<div><div>Ammonia, such as ammonium sulfate and urea, is crucial for fertilizers and the chemical industry in reducing agents and refrigerants. Additionally, ammonia is a promising carbon-free fuel due to its safety and established transportation and storage methods. The Haber-Bosch process, the primary method for ammonia synthesis, is energy-intensive and emits significant greenhouse gases. This process involves the reaction of nitrogen and hydrogen over a catalyst at high temperatures and pressures. With global carbon reduction goals for 2050, renewable energy sources like wind and solar are gaining importance. Therefore, the electrochemical synthesis of 'green ammonia' using renewable energy is a vital research direction.</div><div>This article undertook a meticulous analysis of 1298 journal documents related to ammonia synthesis, sifting through them to identify 172 relevant articles. Key terms such as electrochemical, ammonia synthesis, catalyst, electrode, and green ammonia were meticulously identified using NVivo tools. The research delves into the intricacies of electrochemical nitrogen reduction reaction (eNRR) pathways, nitrogen and hydrogen sources, temperature conditions, catalysts, electrodes, and electrolytes. By conducting a comprehensive comparison of the energy consumption and carbon emissions of various green ammonia synthesis processes, the study aims to pinpoint the optimal parameters for mainstream green ammonia synthesis, thereby providing a robust reference for future developments.</div></div>","PeriodicalId":15759,"journal":{"name":"Journal of Environmental Chemical Engineering","volume":"12 6","pages":"Article 114454"},"PeriodicalIF":7.4,"publicationDate":"2024-10-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142532537","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2024-10-16DOI: 10.1016/j.jece.2024.114447
Mahnoush Beygisangchin , Siti Kartom Kamarudin , Suraya Abdul Rashid , Nurul Atiqah Izzati Md Ishak , Nabila A. Karim , Jaroon Jakmunee , Iswary Letchumanan , Iesti Hajar Hanapi , Siti Hasanah Osman , Amir Hossein Baghdadi
Platinum-based catalysts are widely used for methanol oxidation reaction (MOR) in direct methanol fuel cells (DMFCs), but their excessive cost and scarcity drive the search for alternative materials. This review summarises recent advancements in anode electrocatalysts and support materials for MOR over the past five years. It covers noble metals, transition metal oxides, and carbon-based nanomaterials, emphasising their electrocatalytic performance and structure-property relationships. The role of various supports, including carbon-based, self-assembly, and non-carbon-based carriers, in optimising catalyst performance is discussed. Additionally, strategies to enhance durability and resistance to poisoning, such as surface modification, alloying, and heteroatom doping, are examined. The review highlights the relationship between catalyst design and electrochemical performance, identifies challenges in DMFC optimisation, and underscores the importance of tailoring MOR electrocatalysts for commercial viability.
铂基催化剂被广泛用于直接甲醇燃料电池（DMFC）中的甲醇氧化反应（MOR），但其成本过高和稀缺性促使人们寻找替代材料。本综述总结了过去五年来用于 MOR 的阳极电催化剂和支撑材料的最新进展。它涵盖了贵金属、过渡金属氧化物和碳基纳米材料，强调了它们的电催化性能和结构-性能关系。还讨论了各种支撑物（包括碳基、自组装和非碳基载体）在优化催化剂性能方面的作用。此外，还探讨了提高耐久性和抗中毒性的策略，如表面改性、合金化和杂原子掺杂。综述强调了催化剂设计与电化学性能之间的关系，指出了 DMFC 优化过程中面临的挑战，并强调了定制 MOR 电催化剂以实现商业可行性的重要性。
{"title":"Anode electrocatalysts and their supporting materials for methanol oxidation reaction based on research conducted in recent five years: Comprehensive review","authors":"Mahnoush Beygisangchin , Siti Kartom Kamarudin , Suraya Abdul Rashid , Nurul Atiqah Izzati Md Ishak , Nabila A. Karim , Jaroon Jakmunee , Iswary Letchumanan , Iesti Hajar Hanapi , Siti Hasanah Osman , Amir Hossein Baghdadi","doi":"10.1016/j.jece.2024.114447","DOIUrl":"10.1016/j.jece.2024.114447","url":null,"abstract":"<div><div>Platinum-based catalysts are widely used for methanol oxidation reaction (MOR) in direct methanol fuel cells (DMFCs), but their excessive cost and scarcity drive the search for alternative materials. This review summarises recent advancements in anode electrocatalysts and support materials for MOR over the past five years. It covers noble metals, transition metal oxides, and carbon-based nanomaterials, emphasising their electrocatalytic performance and structure-property relationships. The role of various supports, including carbon-based, self-assembly, and non-carbon-based carriers, in optimising catalyst performance is discussed. Additionally, strategies to enhance durability and resistance to poisoning, such as surface modification, alloying, and heteroatom doping, are examined. The review highlights the relationship between catalyst design and electrochemical performance, identifies challenges in DMFC optimisation, and underscores the importance of tailoring MOR electrocatalysts for commercial viability.</div></div>","PeriodicalId":15759,"journal":{"name":"Journal of Environmental Chemical Engineering","volume":"12 6","pages":"Article 114447"},"PeriodicalIF":7.4,"publicationDate":"2024-10-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142532541","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2024-10-15DOI: 10.1016/j.jece.2024.114387
Rukayya Ibrahim Muazu , Polina Yaseneva , Nilay Shah , Maria-Magdalena Titirici
Bioderived advanced materials possess unique functional properties together with a potential to improve environmental sustainability. This study conducts a critical review of literature on life cycle sustainability assessment (LCSA) of biobased higher-value products with emphasis on bioderived advanced materials including nanocelluloses (cellulose nanocrystals (CNCs) and cellulose nanofibers (CNFs)), and carbon materials (lignin carbon fibre (LCF) and hard carbons (HCs)). The environmental impact of CNCs production from Kraft and dissolving pulp via sulfuric acid hydrolysis is significantly influenced by the end-of-life (EoL) management of sulfuric acid either via recycling or neutralisation with sodium hydroxide. This highlights trade-offs and the need for more sustainable EoL options. Likewise, the production of CNFs using Kraft, dissolving and sulfite pulp via 2,2,6,6-tetramethylpiperidine-1-oxyl (TEMPO) oxidation followed by mechanical homogenisation or sonication indicates higher environmental impact compared with enzymatic hydrolysis. Sustainability of LCF is significantly influenced by the lignin recovery and fabrication technique, thus low-cost sustainable solvents and pathways for LCF production should be prioritised. Existing studies indicate the advantages of HCs production via hydrothermal carbonisation (HTC). However, the sustainability performance of HC is highly influenced by the carbon yield and electrochemical performance, therefore, a comprehensive optimisation of the operating variables is crucial for advancing the sustainability and development of bioderived HCs for energy applications. Significant methodological disparities were observed among the reviewed studies, leading to variations in assessment outcomes. Economic and environmental assessments are frequently presented as standalone results even for combined assessments, which further stresses the inherent heterogeneity across assessment tools.
{"title":"Life cycle sustainability assessment of bioderived advanced materials: A state-of-the-art Review","authors":"Rukayya Ibrahim Muazu , Polina Yaseneva , Nilay Shah , Maria-Magdalena Titirici","doi":"10.1016/j.jece.2024.114387","DOIUrl":"10.1016/j.jece.2024.114387","url":null,"abstract":"<div><div>Bioderived advanced materials possess unique functional properties together with a potential to improve environmental sustainability. This study conducts a critical review of literature on life cycle sustainability assessment (LCSA) of biobased higher-value products with emphasis on bioderived advanced materials including nanocelluloses (cellulose nanocrystals (CNCs) and cellulose nanofibers (CNFs)), and carbon materials (lignin carbon fibre (LCF) and hard carbons (HCs)). The environmental impact of CNCs production from Kraft and dissolving pulp via sulfuric acid hydrolysis is significantly influenced by the end-of-life (EoL) management of sulfuric acid either via recycling or neutralisation with sodium hydroxide. This highlights trade-offs and the need for more sustainable EoL options. Likewise, the production of CNFs using Kraft, dissolving and sulfite pulp via 2,2,6,6-tetramethylpiperidine-1-oxyl (TEMPO) oxidation followed by mechanical homogenisation or sonication indicates higher environmental impact compared with enzymatic hydrolysis. Sustainability of LCF is significantly influenced by the lignin recovery and fabrication technique, thus low-cost sustainable solvents and pathways for LCF production should be prioritised. Existing studies indicate the advantages of HCs production via hydrothermal carbonisation (HTC). However, the sustainability performance of HC is highly influenced by the carbon yield and electrochemical performance, therefore, a comprehensive optimisation of the operating variables is crucial for advancing the sustainability and development of bioderived HCs for energy applications. Significant methodological disparities were observed among the reviewed studies, leading to variations in assessment outcomes. Economic and environmental assessments are frequently presented as standalone results even for combined assessments, which further stresses the inherent heterogeneity across assessment tools.</div></div>","PeriodicalId":15759,"journal":{"name":"Journal of Environmental Chemical Engineering","volume":"12 6","pages":"Article 114387"},"PeriodicalIF":7.4,"publicationDate":"2024-10-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142446944","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2024-10-15DOI: 10.1016/j.jece.2024.114411
Rayane Akoumeh , Sourour Idoudi , Lara A. Nezam El-Din , Hamza Rekik , Maryam Al-Ejji , Deepalekshmi Ponnama , Amit Sharma , Ahmad Arabi Shamsabadi , Karim Alamgir , Kenan Song , Majeda Khraisheh , Mustafa Saleh Nasser , Mohammad K. Hassan
Among oil-water separation technologies, membrane processes are increasingly being recognized in terms of cost-effectiveness and simplicity, offering advantages like easy handling, energy efficiency, and small footprints to other available techniques. Notably, the membrane technology is environmentally friendly as it eliminates the need for additives that can enhance waste generation. Of significance, polymer membranes have attracted substantial attention from researchers due to their operational efficiency, versatility, affordability, and manufacturability. Despite the notable separation performance of polymer membranes, achieving a high total organic carbon (TOC) removal efficiency of >90 % is still challenging. In addition, fouling remains a significant barrier to commercialization, leading to a drastic decline in both filtrate flux and membrane selectivity. This comprehensive review covers various techniques and strategies employed to modify polymeric membranes, aiming to improve their transport and antifouling properties for oil-water separation applications. It encompasses a detailed discussion of different membrane modification methods, including physical and chemical approaches, to enhance membrane properties. In particular, this review emphasizes the techniques used to fabricate block copolymer (BCP)-based membranes at lab-scale and their potential promise for separation of oil and water. Elucidating the advances in modifying polymeric membranes and the subsequent improvements in filtration efficiency and longevity can offer valuable insights into the ongoing progress in membrane technology for oil-water separation applications.
{"title":"Advances in fabrication techniques and performance optimization of polymer membranes for enhanced industrial oil-water separation: A critical review","authors":"Rayane Akoumeh , Sourour Idoudi , Lara A. Nezam El-Din , Hamza Rekik , Maryam Al-Ejji , Deepalekshmi Ponnama , Amit Sharma , Ahmad Arabi Shamsabadi , Karim Alamgir , Kenan Song , Majeda Khraisheh , Mustafa Saleh Nasser , Mohammad K. Hassan","doi":"10.1016/j.jece.2024.114411","DOIUrl":"10.1016/j.jece.2024.114411","url":null,"abstract":"<div><div>Among oil-water separation technologies, membrane processes are increasingly being recognized in terms of cost-effectiveness and simplicity, offering advantages like easy handling, energy efficiency, and small footprints to other available techniques. Notably, the membrane technology is environmentally friendly as it eliminates the need for additives that can enhance waste generation. Of significance, polymer membranes have attracted substantial attention from researchers due to their operational efficiency, versatility, affordability, and manufacturability. Despite the notable separation performance of polymer membranes, achieving a high total organic carbon (TOC) removal efficiency of >90 % is still challenging. In addition, fouling remains a significant barrier to commercialization, leading to a drastic decline in both filtrate flux and membrane selectivity. This comprehensive review covers various techniques and strategies employed to modify polymeric membranes, aiming to improve their transport and antifouling properties for oil-water separation applications. It encompasses a detailed discussion of different membrane modification methods, including physical and chemical approaches, to enhance membrane properties. In particular, this review emphasizes the techniques used to fabricate block copolymer (BCP)-based membranes at lab-scale and their potential promise for separation of oil and water. Elucidating the advances in modifying polymeric membranes and the subsequent improvements in filtration efficiency and longevity can offer valuable insights into the ongoing progress in membrane technology for oil-water separation applications.</div></div>","PeriodicalId":15759,"journal":{"name":"Journal of Environmental Chemical Engineering","volume":"12 6","pages":"Article 114411"},"PeriodicalIF":7.4,"publicationDate":"2024-10-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142441328","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2024-10-14DOI: 10.1016/j.jece.2024.114444
Sewara J. Mohammed , Mohammed K. Sidiq , Hastyar H. Najmuldeen , Kawan F. Kayani , Dana A. Kader , Shujahadeen B. Aziz
Nitrogen-doped carbon dots (N-CDs) have attracted a lot of focus lately because of their extensive medical applications. Bacterial infections convey a significant risk to global public health and economic stability. N-CDs have become highly appealing antibacterial agents due to their photostability, excellent biocompatibility, and versatile surface characteristics. The present review offers an in-depth assessment of the latest advancements in applying N-CDs for combating bacterial infections. We explore various synthesis methods, structural characteristics, and antibacterial mechanisms, with a particular emphasis on the role of nitrogen doping. Addressing current research challenges, we propose strategies to enhance the antibacterial efficacy of N-CDs. By offering comprehensive insights into synthesis, mechanisms, and applications, this review aims to guide future research in this promising field. Additionally, we provide suggestions to increase the activity of N-CDs against various bacterial pathogens, which pose a severe risk to communal health.
{"title":"A comprehensive review on nitrogen-doped carbon dots for antibacterial applications","authors":"Sewara J. Mohammed , Mohammed K. Sidiq , Hastyar H. Najmuldeen , Kawan F. Kayani , Dana A. Kader , Shujahadeen B. Aziz","doi":"10.1016/j.jece.2024.114444","DOIUrl":"10.1016/j.jece.2024.114444","url":null,"abstract":"<div><div>Nitrogen-doped carbon dots (N-CDs) have attracted a lot of focus lately because of their extensive medical applications. Bacterial infections convey a significant risk to global public health and economic stability. N-CDs have become highly appealing antibacterial agents due to their photostability, excellent biocompatibility, and versatile surface characteristics. The present review offers an in-depth assessment of the latest advancements in applying N-CDs for combating bacterial infections. We explore various synthesis methods, structural characteristics, and antibacterial mechanisms, with a particular emphasis on the role of nitrogen doping. Addressing current research challenges, we propose strategies to enhance the antibacterial efficacy of N-CDs. By offering comprehensive insights into synthesis, mechanisms, and applications, this review aims to guide future research in this promising field. Additionally, we provide suggestions to increase the activity of N-CDs against various bacterial pathogens, which pose a severe risk to communal health.</div></div>","PeriodicalId":15759,"journal":{"name":"Journal of Environmental Chemical Engineering","volume":"12 6","pages":"Article 114444"},"PeriodicalIF":7.4,"publicationDate":"2024-10-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142532536","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2024-10-09DOI: 10.1016/j.jece.2024.114389
Fernanda Fajardo Nacif Petraglia , Jonathan Tenório Vinhal , Amilton Barbosa Botelho Junior , Denise Crocce Romano Espinosa
Neodymium is a crucial element for low-carbon technologies with rising search for new sources due to short-term supply interruption risk. Electronic wastes as secondary sources represent a potential with less environmental impact. However, current technologies face challenges as the development of new gadgets released every year and complexity. Conventional hydrometallurgical routes use inorganic acids and organic extractants. Regardless of completely recovering metals, they are harmful reagents for the environment. Despite this, organic acids (OA) and ionic liquids (IL) are investigated as alternatives to these hydrometallurgical processes. OAs/ILs have the potential to reach eco-friendly routes due to their ability to reduce greenhouse gas emissions significantly. This perspective envisions the recycling of permanent magnets for neodymium recovery using OA and ILs. The current approaches and literature regarding OA/ILs, technical efficiencies in a lab, and pilot scale were analyzed. This approach addressed the technical, economic, and environmental analysis demonstrating OA and IL’s great potential to recover rare earth elements.
钕是低碳技术的关键元素，由于短期供应中断的风险，对新资源的需求日益增加。作为二次资源的电子废料具有对环境影响较小的潜力。然而，当前的技术面临着挑战，因为每年都有新的小工具问世，而且十分复杂。传统的湿法冶金路线使用无机酸和有机萃取剂。无论能否完全回收金属，它们都是对环境有害的试剂。尽管如此，有机酸（OA）和离子液体（IL）仍被研究作为这些湿法冶金工艺的替代品。有机酸/离子液体具有显著减少温室气体排放的能力，因此有可能成为生态友好型路线。本研究设想利用 OA 和 IL 回收永磁体中的钕。我们分析了当前有关 OA/IL 的方法和文献、实验室技术效率以及中试规模。该方法涉及技术、经济和环境分析，展示了 OA 和 IL 回收稀土元素的巨大潜力。
{"title":"Recycling of permanent magnets: A perspective for application of organic acids and ionic liquids towards eco-friendly process","authors":"Fernanda Fajardo Nacif Petraglia , Jonathan Tenório Vinhal , Amilton Barbosa Botelho Junior , Denise Crocce Romano Espinosa","doi":"10.1016/j.jece.2024.114389","DOIUrl":"10.1016/j.jece.2024.114389","url":null,"abstract":"<div><div>Neodymium is a crucial element for low-carbon technologies with rising search for new sources due to short-term supply interruption risk. Electronic wastes as secondary sources represent a potential with less environmental impact. However, current technologies face challenges as the development of new gadgets released every year and complexity. Conventional hydrometallurgical routes use inorganic acids and organic extractants. Regardless of completely recovering metals, they are harmful reagents for the environment. Despite this, organic acids (OA) and ionic liquids (IL) are investigated as alternatives to these hydrometallurgical processes. OAs/ILs have the potential to reach eco-friendly routes due to their ability to reduce greenhouse gas emissions significantly. This perspective envisions the recycling of permanent magnets for neodymium recovery using OA and ILs. The current approaches and literature regarding OA/ILs, technical efficiencies in a lab, and pilot scale were analyzed. This approach addressed the technical, economic, and environmental analysis demonstrating OA and IL’s great potential to recover rare earth elements.</div></div>","PeriodicalId":15759,"journal":{"name":"Journal of Environmental Chemical Engineering","volume":"12 6","pages":"Article 114389"},"PeriodicalIF":7.4,"publicationDate":"2024-10-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142441329","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
The emission of gaseous pollutants such as NOx, volatile organic compounds, and CO, is considered as one of the most serious challenges for the environment and climate. Catalytic oxidation has been regarded as one of the most promising technologies for pollutant elimination. Designing efficient catalysts is the major challenge of this technology. Transition-based oxides have been developed as promising candidates due to their low cost and abundance. Among these materials, Mn-based mullite-type oxide catalysts have attracted wide attention due to their special crystal structures, high thermal stability, and enhanced catalytic activities in recent years. Even though they were first synthesized in 2004, they were first used as pollutant elimination catalysts in 2012. Herein, this article systematically reviewed the applications and developments of mullite-type oxide catalysts in pollutant catalytic oxidation. Appropriate calcination temperature, calcination time, and a comparison of different synthetic methods were addressed. The application scenarios, influences of various reaction conditions, and related reaction mechanisms of pristine and modified Mn-based mullite-type oxide catalysts for pollutant catalytic oxidation were highlighted. In-depth study on the reaction mechanism of pollutant catalytic oxidation was analyzed. We hold a belief that this review can provide fundamental points and strategies for the further design and application of Mn-based mullite-type oxide catalysts.
{"title":"Mn-based mullite-type oxides for air pollutant elimination from flue gas","authors":"Ruichang Xu, Zijian Zhou, Pengxin Zeng, Xiaowei Liu, Minghou Xu","doi":"10.1016/j.jece.2024.114400","DOIUrl":"10.1016/j.jece.2024.114400","url":null,"abstract":"<div><div>The emission of gaseous pollutants such as NO<sub>x</sub>, volatile organic compounds, and CO, is considered as one of the most serious challenges for the environment and climate. Catalytic oxidation has been regarded as one of the most promising technologies for pollutant elimination. Designing efficient catalysts is the major challenge of this technology. Transition-based oxides have been developed as promising candidates due to their low cost and abundance. Among these materials, Mn-based mullite-type oxide catalysts have attracted wide attention due to their special crystal structures, high thermal stability, and enhanced catalytic activities in recent years. Even though they were first synthesized in 2004, they were first used as pollutant elimination catalysts in 2012. Herein, this article systematically reviewed the applications and developments of mullite-type oxide catalysts in pollutant catalytic oxidation. Appropriate calcination temperature, calcination time, and a comparison of different synthetic methods were addressed. The application scenarios, influences of various reaction conditions, and related reaction mechanisms of pristine and modified Mn-based mullite-type oxide catalysts for pollutant catalytic oxidation were highlighted. In-depth study on the reaction mechanism of pollutant catalytic oxidation was analyzed. We hold a belief that this review can provide fundamental points and strategies for the further design and application of Mn-based mullite-type oxide catalysts.</div></div>","PeriodicalId":15759,"journal":{"name":"Journal of Environmental Chemical Engineering","volume":"12 6","pages":"Article 114400"},"PeriodicalIF":7.4,"publicationDate":"2024-10-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142416123","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2024-10-09DOI: 10.1016/j.jece.2024.114373
Guangyi Ma , Zheming Xi , Yiheng Chen , Wenjie Xu , Chengde Sun , Wenjun Zhuang , Tao Zhang , Dapeng Li , Yang Pan , Yu-You Li , Zhe Kong
Recently, with an increasing recognition of the global imperative for carbon neutrality, underscoring the significance of advanced sustainable and low-carbon biotechnologies for rural wastewater treatment is becoming more important. The decentralized distribution of rural wastewater, which frequently cannot be centrally processed, coupled with fluctuations in water quality and volume, present challenges for implementing low-carbon treatment strategies. Among all treatment processes of rural wastewater, biofiltration system is considered as a suitable and low-carbon treatment process. In this study, benefits and advancements of implementing biofiltration process and its derivatives as good alternatives to the low-carbon treatment of rural wastewater towards carbon neutrality. Challenges of rural wastewater treatment and limitations of existing biological treatment processes were investigated. Advanced biofiltration technologies integrated with the concept of carbon neutrality present advantages such as promoted removal performance of pollutants, energy conservation, lower operational expenses, and minimal greenhouse gas emissions were recommended. These systems have the potential for extension and modification to accommodate various circumstances. Newly developed biotechnologies for the enhancements of biofiltration process include combinations like improvements on filter media, exogenous additives for enhanced removal, integration with carbon-neutral processes for effective nitrogen and phosphorus removal like sulfur-based autotrophic denitrification, pyrite-based autotrophic denitrification and anaerobic ammonium oxidation process with its upgrades and derivatives. In the future, developments in biofiltration process can be pursued through various avenues for the aim of achieving low-carbon treatment of pollutants from rural wastewater. This study offers a novel perspective on the utilization of biofiltration and popularize the carbon-neutral treatment of rural wastewater.
{"title":"Biofiltration for low-carbon rural wastewater treatment: A review of advancements and opportunities towards carbon neutrality","authors":"Guangyi Ma , Zheming Xi , Yiheng Chen , Wenjie Xu , Chengde Sun , Wenjun Zhuang , Tao Zhang , Dapeng Li , Yang Pan , Yu-You Li , Zhe Kong","doi":"10.1016/j.jece.2024.114373","DOIUrl":"10.1016/j.jece.2024.114373","url":null,"abstract":"<div><div>Recently, with an increasing recognition of the global imperative for carbon neutrality, underscoring the significance of advanced sustainable and low-carbon biotechnologies for rural wastewater treatment is becoming more important. The decentralized distribution of rural wastewater, which frequently cannot be centrally processed, coupled with fluctuations in water quality and volume, present challenges for implementing low-carbon treatment strategies. Among all treatment processes of rural wastewater, biofiltration system is considered as a suitable and low-carbon treatment process. In this study, benefits and advancements of implementing biofiltration process and its derivatives as good alternatives to the low-carbon treatment of rural wastewater towards carbon neutrality. Challenges of rural wastewater treatment and limitations of existing biological treatment processes were investigated. Advanced biofiltration technologies integrated with the concept of carbon neutrality present advantages such as promoted removal performance of pollutants, energy conservation, lower operational expenses, and minimal greenhouse gas emissions were recommended. These systems have the potential for extension and modification to accommodate various circumstances. Newly developed biotechnologies for the enhancements of biofiltration process include combinations like improvements on filter media, exogenous additives for enhanced removal, integration with carbon-neutral processes for effective nitrogen and phosphorus removal like sulfur-based autotrophic denitrification, pyrite-based autotrophic denitrification and anaerobic ammonium oxidation process with its upgrades and derivatives. In the future, developments in biofiltration process can be pursued through various avenues for the aim of achieving low-carbon treatment of pollutants from rural wastewater. This study offers a novel perspective on the utilization of biofiltration and popularize the carbon-neutral treatment of rural wastewater.</div></div>","PeriodicalId":15759,"journal":{"name":"Journal of Environmental Chemical Engineering","volume":"12 6","pages":"Article 114373"},"PeriodicalIF":7.4,"publicationDate":"2024-10-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142416124","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
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