Green Chemical Engineering最新文献

{"title":"Pool bio-oxidation and fitting analysis of low-grade arsenic-containing refractory gold ore","authors":"","doi":"10.1016/j.gce.2024.01.001","DOIUrl":"10.1016/j.gce.2024.01.001","url":null,"abstract":"<div><p>To overcome the limitations of geography, climate, and ore characteristics on the ore beneficiation process, bio-oxidation studies on low-grade arsenic-bearing refractory gold ore by pool leaching were carried out, as well as process fitting analysis. The gold particles are encapsulated by pyrite and arsenopyrite. After 60 days of bio-oxidation, the oxidation rates of arsenic, sulfur, and gold were 39%∼69%, 24%∼41%, and 49%∼83%, respectively. The inoculated <em>Acidithiobacillus ferrooxidans</em>, <em>Ferroplasma acidiphilum</em>, and <em>Leptospirillum ferrodiazotrophum</em> could all mediate the initial pyrite/arsenopyrite oxidation and the Fe²⁺ oxidation reaction, but only the former could mediate the subsequent sulfur compound oxidation. When compared to daily bacterial circulation and bacterial replacement every ten days, aeration improved the gold leaching rate by 14%∼22%. The Boltzmann model could fit both the arsenic and sulfur bio-oxidation, with model fit variances greater than 0.98. Based on the experimental and fitting results, the bio-oxidation cycle was determined to be 60 days, and the bio-oxidation mechanisms are summarized. This study has significant practical implications for the rational utilization of gold resources and provides theoretical and practical guidance for similar gold ores.</p></div>","PeriodicalId":66474,"journal":{"name":"Green Chemical Engineering","volume":"5 4","pages":"Pages 511-518"},"PeriodicalIF":9.1,"publicationDate":"2024-01-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.sciencedirect.com/science/article/pii/S2666952824000013/pdfft?md5=731fe9ff05265063ab5e0fa734190326&pid=1-s2.0-S2666952824000013-main.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139537049","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Eco-friendly synthesis and environmental impact assessment of hierarchical Beta zeolite from kaolinite and recycled mother liquor","authors":"","doi":"10.1016/j.gce.2024.01.002","DOIUrl":"10.1016/j.gce.2024.01.002","url":null,"abstract":"<div><p>The development of sustainable techniques to produce high-performance zeolite is essential to achieve green production in industry. Herein, we report an eco-friendly route to synthesizing hierarchical Beta zeolite from kaolinite and recycled mother liquor. The results reveal that the unutilized species (such as silicon species and Na⁺) in mother liquor stayed in a stable concentration during eleven recycled experiments. Moreover, the synthesized Beta zeolites still have comparable physicochemical properties and catalytic performance in the esterification of levulinic acid with ethanol over the initial zeolite although eleven recycled experiments. Life cycle assessment exhibits that the synthesis of Beta zeolite with recycled mother liquor can reduce global warming potential by 23% and resource depletion-water use by 36% compared to that without recycled mother liquor. This quantitatively demonstrates that the approach proposed in this work is really a sustainable one, extremely increasing the utilization efficiency of raw materials and decreasing the environmental burden.</p></div>","PeriodicalId":66474,"journal":{"name":"Green Chemical Engineering","volume":"5 4","pages":"Pages 501-510"},"PeriodicalIF":9.1,"publicationDate":"2024-01-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.sciencedirect.com/science/article/pii/S2666952824000025/pdfft?md5=b996367fb2f78eb1b4471f578847b960&pid=1-s2.0-S2666952824000025-main.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139453851","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Advancements in adsorption and photodegradation technologies for Rhodamine B dye wastewater treatment: fundamentals, applications, and future directions","authors":"","doi":"10.1016/j.gce.2023.12.004","DOIUrl":"10.1016/j.gce.2023.12.004","url":null,"abstract":"<div><p>Organic dye pollutants present in wastewater pose a significant global challenge. Among pollutants, the synthetic dye Rhodamine B (RB) stands out due to its non-biodegradable nature and associated neurotoxic, carcinogenic, and respiratory irritant properties. Extensive research has been conducted on the efficacy of adsorption and photodegradation techniques for the removal of RB from wastewater. While adsorption and advanced oxidation processes (AOPs) have gained considerable attention for their effectiveness in recent years, the underlying behaviors and mechanisms of these technologies remain incompletely understood. Therefore, a comprehensive summary of recent research progress in this domain is imperative to clarify the basics and present the up-to-date achievements.</p><p>This review provides an in-depth exploration of the fundamentals, advancements, and future trajectories of RB wastewater treatment technologies, mainly encompassing adsorption and photodegradation. This work starts with a general introduction of outlining the sources, toxicity, and diverse applicable removal strategies. Subsequently, it thoroughly examines crucial techniques within non-photochemical, photochemical, and adsorption technologies, such as UV light assisted AOP, catalyst assisted AOP, ozonation, Fenton system, electrochemical AOP, and adsorption technology. The primary objective is to furnish a broad overview of these techniques, elucidating their effectiveness, limitations, and applicability. Following this, the review encapsulates state-of-the-art computational simulations pertaining to RB adsorption and interactions with clays and other adsorbents. Lastly, it delves into column adsorption of RB dye, and elucidates various influencing factors, including bed height, feed concentration, pollutant (RB) feeding or flow rate, and column regeneration. This panoramic review aims to provide valuable insights into suitable techniques, research gaps, and the applicability of non-photochemical, photochemical, and adsorption technologies in the treatment of wastewater containing RB dye.</p></div>","PeriodicalId":66474,"journal":{"name":"Green Chemical Engineering","volume":"5 4","pages":"Pages 440-460"},"PeriodicalIF":9.1,"publicationDate":"2023-12-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.sciencedirect.com/science/article/pii/S2666952823000729/pdfft?md5=e77d1162193bc30096004d82b7ef0aa8&pid=1-s2.0-S2666952823000729-main.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139188508","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"The role of hydrogen bonding in solubilizing camptothecin in hydrophilic and hydrophobic ionic liquids","authors":"Xiaotong Zhu ,&nbsp;Liwen Mu ,&nbsp;Jiahua Zhu ,&nbsp;Xiaohua Lu ,&nbsp;Yuanhui Ji","doi":"10.1016/j.gce.2023.12.002","DOIUrl":"10.1016/j.gce.2023.12.002","url":null,"abstract":"<div><p>Utilizing ionic liquid (IL)-water mixtures as selective extraction solvents for raw materials from natural sources represents an efficacious approach; however, elucidating the underlying mechanisms inherent in various types of IL-aqueous solutions continues to pose a significant challenge. In this study, molecular dynamics simulations and density functional theory calculations are employed to illuminate the influence of the functional anion within ILs and the water content on the solvation mechanism and phase separation phenomena observed during the extraction of camptothecin (CPT) using aqueous IL solutions. The simulation results show that the anions in ILs preferentially dissolve CPT through hydrogen bonding at low water concentrations. As the water concentration increases, the hydrophobic IL binds more tightly to CPT, enabling the water to self-aggregate. The anions in hydrophilic IL form hydrogen bonds with water instead, further enhancing the dissolution of CPT. This work reveals the mechanism of phase separation and solvation of different types of IL aqueous solutions, which is helpful in developing new drug extraction and purification technologies.</p></div>","PeriodicalId":66474,"journal":{"name":"Green Chemical Engineering","volume":"5 4","pages":"Pages 489-500"},"PeriodicalIF":9.1,"publicationDate":"2023-12-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.sciencedirect.com/science/article/pii/S2666952823000705/pdfft?md5=423de442c4d3ce736f95665c416c2930&pid=1-s2.0-S2666952823000705-main.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142129984","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Elucidating solvent effects on the stability of phenoxyl radicals in monohydric alcohols via electron paramagnetic resonance","authors":"","doi":"10.1016/j.gce.2023.12.003","DOIUrl":"10.1016/j.gce.2023.12.003","url":null,"abstract":"<div><p>Research on solvent effects is an important and long-standing topic, but there still is some room, especially for the special solvent effect of fluoroalcohols. In this work, we investigated the stability of phenoxyl radical in monohydric alcohol solvents through <em>in-situ</em> electron paramagnetic resonance detections. The decay behavior of phenoxyl radical showed a reasonable relationship with the mesoscopic structure of alcohols, characterized by small- and wide-angle X-ray scattering. Moreover, the distinct solvent effects of fluoroalcohols were emphasized, and the significant influence of van der Waals distance in the solvents was suggested. Overall, the stability of phenoxyl radical in alcohols was quantified and correlated with the solvent structures. We believe that the established method for stability study on radicals will encourage solvent effect studies on various organic reactions, and the proposed solvent effects in fluoroalcohols may inspire the development of green solvents in both industrial conversions and organic synthesis.</p></div>","PeriodicalId":66474,"journal":{"name":"Green Chemical Engineering","volume":"5 4","pages":"Pages 483-488"},"PeriodicalIF":9.1,"publicationDate":"2023-12-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.sciencedirect.com/science/article/pii/S2666952823000717/pdfft?md5=22940848980bd5a578eb614c000eb1a4&pid=1-s2.0-S2666952823000717-main.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139188866","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Structural engineering of antimicrobials for optimal broad-spectrum activity","authors":"","doi":"10.1016/j.gce.2023.12.001","DOIUrl":"10.1016/j.gce.2023.12.001","url":null,"abstract":"<div><p>Antimicrobial materials are a crucial component in eradicating and managing the spread of infectious diseases. They are expected to act on a broad-spectrum of microbes, including emerging pathogens which could cause the next Disease X. Herein, we reassessed a series of antimicrobial imidazolium polymers on our shelves and uncovered extended functionality through dual modes of action. By redesigning their structures, a truly broad-spectrum antimicrobial material with optimized activity against bacteria (G ​+ve, G -ve) and fungi, as well as enveloped and non-enveloped viruses was developed. We demonstrated that the imidazolium polymer exhibits dual modes of function against microbes: targeting the microbial membrane and binding DNA. The latter DNA binding affinity was found to be key against non-enveloped viruses. With this insight, we designed small molecule compounds that exhibited optimum broad-spectrum antimicrobial activity and excellent efficacy against ESKAPE group of pathogens that are responsible for some of the deadliest nosocomial infections worldwide. Our results could also shed light on the design of broad-spectrum antimicrobial compounds against Disease X.</p></div>","PeriodicalId":66474,"journal":{"name":"Green Chemical Engineering","volume":"5 4","pages":"Pages 473-482"},"PeriodicalIF":9.1,"publicationDate":"2023-12-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.sciencedirect.com/science/article/pii/S2666952823000699/pdfft?md5=190db8d185c173a03de7cea6157b79f2&pid=1-s2.0-S2666952823000699-main.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139016760","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Low-melting mixture solvents: extension of deep eutectic solvents and ionic liquids for broadening green solvents and green chemistry","authors":"","doi":"10.1016/j.gce.2023.11.001","DOIUrl":"10.1016/j.gce.2023.11.001","url":null,"abstract":"<div><p>Green solvents such as water and ionic liquids (ILs) are pillars of the great mansion of green chemistry and green processing. Initially proposed as a new family of ILs, deep eutectic solvents (DESs) have received fast development in the past two decades. In this contribution, DESs are reviewed critically and the concept is extended to low-melting mixture solvents (LoMMSs), which cover all kinds of materials including ionic compounds, molecular compounds, and metals. Six classes of LoMMSs are proposed as the new classification system and examples are given. Finally, several thermodynamic issues concerning LoMMSs are discussed. Two new concepts, robustness of LoMMSs and high-entropy LoMMSs, are proposed.</p></div>","PeriodicalId":66474,"journal":{"name":"Green Chemical Engineering","volume":"5 4","pages":"Pages 409-417"},"PeriodicalIF":9.1,"publicationDate":"2023-11-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.sciencedirect.com/science/article/pii/S2666952823000602/pdfft?md5=db8e9e488eb50d16a30a7529e84978ba&pid=1-s2.0-S2666952823000602-main.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139291429","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Multiperiod optimization of cooling water system with flexible topology network","authors":"","doi":"10.1016/j.gce.2023.10.005","DOIUrl":"10.1016/j.gce.2023.10.005","url":null,"abstract":"<div><p>Cooling water systems (CWSs) are extensively utilized in various industries to eliminate the excess heat and converse energy. Studies on CWSs mainly concentrated on finding the optimal cooler network structure. In addition, some works also considered the optimal design under varied operation conditions. However, in these works, once the optimal design of the cooler's network is determined, its arrangement remains fixed and cannot be adapted to accommodate diverse operating conditions. In this work, a flexible topology network concept is proposed to make the adjustment of network structure possible under different operation conditions. The CWS with integrated air cooler and flexible topology network has better overall performance, represented by a mixed integer nonlinear programming (MINLP) model that require advanced tools such as GAMS software. Case studies revealed that the proposed methodology can realize better energy-saving performance, and improve the economic performance under varied operation conditions. The impact of critical flexible nodes on system configuration and economy is achieved by sensitivity analysis.</p></div>","PeriodicalId":66474,"journal":{"name":"Green Chemical Engineering","volume":"5 4","pages":"Pages 461-472"},"PeriodicalIF":9.1,"publicationDate":"2023-11-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.sciencedirect.com/science/article/pii/S2666952823000596/pdfft?md5=285f79d92eb99fcba1ddc3508061ba55&pid=1-s2.0-S2666952823000596-main.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135454829","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"OFC: Outside Front Cover","authors":"","doi":"10.1016/S2666-9528(23)00047-X","DOIUrl":"https://doi.org/10.1016/S2666-9528(23)00047-X","url":null,"abstract":"","PeriodicalId":66474,"journal":{"name":"Green Chemical Engineering","volume":"4 4","pages":"Page OFC"},"PeriodicalIF":0.0,"publicationDate":"2023-11-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"71783064","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Outside Back Cover","authors":"","doi":"10.1016/S2666-9528(23)00054-7","DOIUrl":"https://doi.org/10.1016/S2666-9528(23)00054-7","url":null,"abstract":"","PeriodicalId":66474,"journal":{"name":"Green Chemical Engineering","volume":"4 4","pages":"Page OBC"},"PeriodicalIF":0.0,"publicationDate":"2023-11-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"71783145","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}