ACS ES&T engineering最新文献_第7页

Insights into the Degradability of Poly(lactic acid) and Its Association with the Bacterial Community in a Simulated Industrial Food Waste Composting System 在模拟工业食物垃圾堆肥系统中聚乳酸的可降解性及其与细菌群落的关系

IF 7.4

ACS ES&T engineering Pub Date : 2025-01-02 DOI: 10.1021/acsestengg.4c0059510.1021/acsestengg.4c00595

Guangyu Cui, Xiaoyi Wu, Xuyang Lei, Ning Wang, Fan Lü, Pinjing He and Qiyong Xu*,

{"title":"Insights into the Degradability of Poly(lactic acid) and Its Association with the Bacterial Community in a Simulated Industrial Food Waste Composting System","authors":"Guangyu Cui, Xiaoyi Wu, Xuyang Lei, Ning Wang, Fan Lü, Pinjing He and Qiyong Xu*, ","doi":"10.1021/acsestengg.4c0059510.1021/acsestengg.4c00595","DOIUrl":"https://doi.org/10.1021/acsestengg.4c00595https://doi.org/10.1021/acsestengg.4c00595","url":null,"abstract":"The environmental risk associated with bioplastics has garnered increasing attention. However, their fates and the driving mechanisms in industrial composting engineering, which is a primary method for treating food waste, remain unclear. This study delved into the degradation behaviors of poly(lactic acid) (PLA) and its correlation with the PLA-associated bacterial communities in simulated food waste composting systems with and without the addition of a microbial agent (MA). The results derived from the water contact angle and molecular weight (Mn) analyses indicate that composting exhibited a limited degradation capacity for the polymer. The addition of the microbial agent (MA) demonstrated a promoting effect, leading to final Mn values of 8970 g·mol–1 for the treatment group and 19,324 g·mol–1 for the control group, compared to an initial Mn of 50,136 g·mol–1 for the polymer. The influence of composting on PLA-associated bacterial communities manifested in the later stages of composting, showing a lower diversity (Shannon index of 4.11) compared to the compost (4.50). The supplementation of MA facilitated the development of biofilms within the plastisphere, resulting in an increased level of presence of functional bacteria crucial for PLA degradation. This study sheds light on the underlying mechanisms of PLA degradation under typical food waste composting conditions, providing crucial insights into the effective handling and risk evaluation of bioplastics in composting environments.","PeriodicalId":7008,"journal":{"name":"ACS ES&T engineering","volume":"5 2","pages":"531–540 531–540"},"PeriodicalIF":7.4,"publicationDate":"2025-01-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143402379","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}

引用次数: 0

Hydroxyl-Induced Electronic Structure and Electron Transfer for Improved N2O Decomposition Activity of Co3O4 羟基诱导的电子结构和电子转移对提高Co3O4分解N2O活性的影响

IF 7.4

ACS ES&T engineering Pub Date : 2024-12-30 DOI: 10.1021/acsestengg.4c0079110.1021/acsestengg.4c00791

Hongjun Ou, Yi Yue, Tao Yang, Haihua Zhou, Runshuang Peng, Chizhong Wang, Shangchao Xiong*, Jianjun Chen and Junhua Li,

{"title":"Hydroxyl-Induced Electronic Structure and Electron Transfer for Improved N2O Decomposition Activity of Co3O4","authors":"Hongjun Ou, Yi Yue, Tao Yang, Haihua Zhou, Runshuang Peng, Chizhong Wang, Shangchao Xiong*, Jianjun Chen and Junhua Li, ","doi":"10.1021/acsestengg.4c0079110.1021/acsestengg.4c00791","DOIUrl":"https://doi.org/10.1021/acsestengg.4c00791https://doi.org/10.1021/acsestengg.4c00791","url":null,"abstract":"Hydroxyl groups (−OH) were loaded on the surface of Co3O4 through hydrothermal treatment, which enhanced the electron transfer process at the gas–solid interface and the N2O decomposition performance. Hydrothermal treatment does not substantially alter the crystal structure or oxygen vacancy content of the Co3O4 catalyst, while it slightly suppresses the BET surface area and reducibility. These factors do not primarily contribute to the enhanced N2O decomposition activity of Co3O4. The −OH content peaks at 8 h of hydrothermal treatment, correlating with the highest catalytic activity. Electronic structure analysis reveals that the −OH groups raise the d-band center and narrow the band gap, thereby facilitating N2O adsorption and electron transfer. DFT simulations support these findings, indicating that −OH groups enhance electron transfer from Co to N2O, promoting N–O bond cleavage and lowering the activation barrier. This work provides an in-depth exploration of the mechanism by which hydroxyl groups facilitate electron transfer processes, offering fundamental insights into catalytic science and providing guidance for new catalyst design.","PeriodicalId":7008,"journal":{"name":"ACS ES&T engineering","volume":"5 4","pages":"1032–1042 1032–1042"},"PeriodicalIF":7.4,"publicationDate":"2024-12-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143814414","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}

引用次数: 0

Pyrolysis as a Remediation Strategy for Weathered Oil-Contaminated Soil: The Role of Minerals and Native Organic Matter 热解作为风化油污染土壤的修复策略：矿物和天然有机质的作用

IF 7.4

ACS ES&T engineering Pub Date : 2024-12-28 DOI: 10.1021/acsestengg.4c0084510.1021/acsestengg.4c00845

Haohao Bian, Hao Zhou, Dehui Kong, Junhao Huang, Sher Bahadar Khan, Teik Thye Lim*, Zhang Lin, Liyuan Chai and Xintai Su*,

{"title":"Pyrolysis as a Remediation Strategy for Weathered Oil-Contaminated Soil: The Role of Minerals and Native Organic Matter","authors":"Haohao Bian, Hao Zhou, Dehui Kong, Junhao Huang, Sher Bahadar Khan, Teik Thye Lim*, Zhang Lin, Liyuan Chai and Xintai Su*, ","doi":"10.1021/acsestengg.4c0084510.1021/acsestengg.4c00845","DOIUrl":"https://doi.org/10.1021/acsestengg.4c00845https://doi.org/10.1021/acsestengg.4c00845","url":null,"abstract":"Soil contaminated by weathered oil (WO) is the most challenging and toxic type of oily sludge (OS) to remediate. Its pyrolysis behavior is significantly affected by soil composition, including minerals and natural organic matter, yet the interaction mechanism remains unclear. This study systematically investigates the influence of natural minerals and organic matter on the pyrolysis behavior of WO-contaminated soil, with a particular focus on the mechanisms of key minerals (e.g., SiO2, CaO, MgO, Fe2O3, and Al2O3) and natural organic matter, represented by humic acid (HA). The findings reveal substantial differences in the catalytic performance of various minerals during pyrolysis. MgO and CaO exhibit exceptional catalytic cracking capabilities in the mid- to high-temperature range, significantly enhancing the quality of pyrolysis-derived oil and gas fuels. Fe2O3 demonstrates superior performance at elevated temperatures by promoting aromatic stability and hydrogen production. Moreover, HA, in synergy with minerals, optimizes pyrolysis pathways, improves hydrocarbon fuel yields, and refines the characteristics of the residual materials. This study further elucidates the distribution patterns of pyrolysis products and their intricate interactions with minerals and organic matter, providing critical insights for the efficient remediation of WO-contaminated soil. These findings offer a novel perspective on the restoration and resource utilization of WO-contaminated soil while delivering valuable guidance for advancing catalytic pyrolysis technologies.","PeriodicalId":7008,"journal":{"name":"ACS ES&T engineering","volume":"5 5","pages":"1180–1190 1180–1190"},"PeriodicalIF":7.4,"publicationDate":"2024-12-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143921329","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}

引用次数: 0

rGO-Augmented Photosynthetic Biohybrid System for Biohydrogen Production: Regulatory Mechanisms and Wastewater Treatment Applications rgo增强生物氢生产的光合生物杂交系统：调节机制和废水处理应用

IF 7.4

ACS ES&T engineering Pub Date : 2024-12-26 DOI: 10.1021/acsestengg.4c0072910.1021/acsestengg.4c00729

Xue-Meng Wang, Lin Chen, Tian Liu, Zhi-Yan Guo, Zhen-Yu Wang, Lang Teng, Xian-Zhong Fu, Zhi-Xuan Zhang, Rong Chen and Wen-Wei Li*,

{"title":"rGO-Augmented Photosynthetic Biohybrid System for Biohydrogen Production: Regulatory Mechanisms and Wastewater Treatment Applications","authors":"Xue-Meng Wang, Lin Chen, Tian Liu, Zhi-Yan Guo, Zhen-Yu Wang, Lang Teng, Xian-Zhong Fu, Zhi-Xuan Zhang, Rong Chen and Wen-Wei Li*, ","doi":"10.1021/acsestengg.4c0072910.1021/acsestengg.4c00729","DOIUrl":"https://doi.org/10.1021/acsestengg.4c00729https://doi.org/10.1021/acsestengg.4c00729","url":null,"abstract":"Photosynthetic biohybrid system (PBS), which utilizes photoenergy to augment microbial metabolism, offers a promising route for efficient bioproduction and wastewater valorization. However, the existing PBS generally suffers from low bioproduction efficiency due to sluggish electron transfer at the semiconductor–microbe interface and inadequate stability for practical applications. In addition, well-defined culture media are exclusively used; thus, their potential for real wastewater treatment remains untapped. Herein, we address these challenges by using reduced graphene oxide (rGO) as a conductive bridge and protective layer to drastically augment the performance of a hydrogen-producing PBS, consisting of Shewanella oneidensis MR-1 cells and cadmium sulfide (CdS). The rGO layer, which encapsulates CdS and offers an abundant area for contact with bacterial cells, plays a critical role in boosting the separation and further delivery of photoexcited electrons to the cell surface. It also considerably reduces CdS photocorrosion by using excess photoelectrons to scavenge the photoinduced holes, thus improving bacterial viability. As a consequence, the rGO-augmented PBS exhibited a remarkable quantum efficiency of 22.8% for hydrogen production, which was 26 times higher than that of the rGO-free control under visible light. Superior hydrogen-producing efficiency and stability of the system for treating real aquaculture wastewater were also demonstrated. Our work may inspire technological innovations that synergize microbial and photocatalytic processes for sustainable bioproduction and/or wastewater valorization applications.","PeriodicalId":7008,"journal":{"name":"ACS ES&T engineering","volume":"5 4","pages":"932–941 932–941"},"PeriodicalIF":7.4,"publicationDate":"2024-12-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143814412","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}

引用次数: 0

Unexpected Mn(V) Generation in Mn(II)/Sulfite System for Efficient Water Decontamination: Critical Role of Complexing Ligands in Regulating Mn(II) Activity Mn(II)/亚硫酸盐系统中意想不到的Mn(V)生成用于有效的水净化：配合配体在调节Mn（II）活性中的关键作用

IF 7.4

ACS ES&T engineering Pub Date : 2024-12-23 DOI: 10.1021/acsestengg.4c0074110.1021/acsestengg.4c00741

Yuan Gao, Yun Luo, Jingyu Hu, Ziyang Chen, Xuezhen Wei, Zhanhao Yun, Zhong Zhang, Jinxing Ma, Yang Zhou* and Xiaohong Guan*,

{"title":"Unexpected Mn(V) Generation in Mn(II)/Sulfite System for Efficient Water Decontamination: Critical Role of Complexing Ligands in Regulating Mn(II) Activity","authors":"Yuan Gao, Yun Luo, Jingyu Hu, Ziyang Chen, Xuezhen Wei, Zhanhao Yun, Zhong Zhang, Jinxing Ma, Yang Zhou* and Xiaohong Guan*, ","doi":"10.1021/acsestengg.4c0074110.1021/acsestengg.4c00741","DOIUrl":"https://doi.org/10.1021/acsestengg.4c00741https://doi.org/10.1021/acsestengg.4c00741","url":null,"abstract":"In recent times, advanced oxidation processes (AOPs) based on sulfite activation via transition metal ions have gained significant attention for water decontamination. In this work, we unexpectedly discovered that Mn(II) was inefficient in sulfite activation for water treatment. Intriguingly, the introduction of amino ligands such as nitrilotriacetic acid and picolinic acid significantly enhanced the performance of Mn(II) in sulfite activation, enabling the effective abatement of contaminants. By combining quenching, chemical probing, 18O isotope tracing, and electrochemical experiments, this study addressed why the Mn(II)/sulfite system was sluggish in contaminants degradation, how Mn(V) was generated in the Mn(II)/sulfite/amino ligand system, and why different complexing ligands exhibited distinct performances. We demonstrated that the amino ligand notably enhanced the activity of Mn(II) with the production of stabilized Mn(III), which underwent further conversion to Mn(V) species, resulting in the rapid degradation of contaminants. This study represents the first discovery of the unexpected Mn(V) formation from low-valence manganese in a sulfite-based system. Furthermore, the spectral characteristics of Mn(V) species under environmental pH conditions were identified for the first time. These findings introduce a novel oxidation process for water decontamination and will broaden our understanding of sulfite-activation-based AOPs as well as the application of manganese chemistry in water treatment for decontamination and beyond.","PeriodicalId":7008,"journal":{"name":"ACS ES&T engineering","volume":"5 4","pages":"970–978 970–978"},"PeriodicalIF":7.4,"publicationDate":"2024-12-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143814411","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}

引用次数: 0

Mechanistic Insights into Sulfamethazine Degradation by Defect-Rich MnO2-Activated Peracetic Acid 富缺陷二氧化锰活化过氧乙酸降解磺胺乙胺的机理研究

IF 7.4

ACS ES&T engineering Pub Date : 2024-12-18 DOI: 10.1021/acsestengg.4c0059610.1021/acsestengg.4c00596

Jie Dong, Long Li, Chang Zhang, Daofen Huang, Xing Li, Mengxi Zhao, Guangfu Wang, Irene M. C. Lo, Xiaohong Guan and Haoran Dong*,

{"title":"Mechanistic Insights into Sulfamethazine Degradation by Defect-Rich MnO2-Activated Peracetic Acid","authors":"Jie Dong, Long Li, Chang Zhang, Daofen Huang, Xing Li, Mengxi Zhao, Guangfu Wang, Irene M. C. Lo, Xiaohong Guan and Haoran Dong*, ","doi":"10.1021/acsestengg.4c0059610.1021/acsestengg.4c00596","DOIUrl":"https://doi.org/10.1021/acsestengg.4c00596https://doi.org/10.1021/acsestengg.4c00596","url":null,"abstract":"Manganese (Mn)-based oxides, mainly MnO2, have garnered significant attention in catalytic applications due to their superior redox properties and structural flexibility. However, their saturated coordination structure presents challenges in achieving an enhanced performance. Herein, a defective MnO2 catalyst (MnO2-D) was constructed, and for the first time, it was proven to effectively activate peracetic acid (PAA) for the complete degradation of sulfamethazine (SMT). Compared to MnO2 with a saturated coordination structure (i.e., the perfect MnO2 structure, MnO2-P), the MnO2-D catalyst exhibited a higher surface electron density and abundant surface oxygen vacancies (OVs), significantly improving its catalytic activity. Experimental evidence revealed that the OVs and Mn3+ on the surface of MnO2-D were considered as the primary active sites and that the MnO2-D/PAA system followed a singlet oxygen (1O2)-dominated nonradical pathway. The MnO2-D catalyst can maintain its activity with minimal interference from inorganic anions, humic acid, varying pH levels, and real water environments. In addition, the MnO2-D/PAA system was efficient in mitigating the toxicity of SMT and eliminating diverse micropollutants. This work presents an enhancement strategy for constructing defect-rich metal oxide catalysts to advance future water treatment technologies.","PeriodicalId":7008,"journal":{"name":"ACS ES&T engineering","volume":"5 3","pages":"607–619 607–619"},"PeriodicalIF":7.4,"publicationDate":"2024-12-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143608841","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}

引用次数: 0

Enhanced Medium-Chain Fatty Acids Production by Iron–Carbon Microelectrolysis: Performance and Mechanisms 铁碳微电解增强中链脂肪酸生产：性能和机制

IF 7.4

ACS ES&T engineering Pub Date : 2024-12-17 DOI: 10.1021/acsestengg.4c0075510.1021/acsestengg.4c00755

Jingwei Ma, Qihe Zhao, Qiulai He*, Liang Zhu and Shuizhou Ke,

{"title":"Enhanced Medium-Chain Fatty Acids Production by Iron–Carbon Microelectrolysis: Performance and Mechanisms","authors":"Jingwei Ma, Qihe Zhao, Qiulai He*, Liang Zhu and Shuizhou Ke, ","doi":"10.1021/acsestengg.4c0075510.1021/acsestengg.4c00755","DOIUrl":"https://doi.org/10.1021/acsestengg.4c00755https://doi.org/10.1021/acsestengg.4c00755","url":null,"abstract":"The low biodegradability and slack electron transfer of waste-activated sludge (WAS) posed significant challenges to medium-chain fatty acids (MCFAs) production. Herein, a viable iron–carbon microelectrolysis (ICME) technique was proposed to improve the synthesis of MCFAs from WAS through accelerating WAS disintegration and substrate transformation and increasing the electron transport efficiency, simultaneously. Results showed that the maximum MCFAs production in the ICME-mediated chain elongation (CE) process was up to 4.4 times that of the control. Mechanistic exploration revealed that the formation of microscopic galvanic cells drove boosted electron transfer within the ICME, which greatly enhanced the effect of direct interspecies electron transfer (DIET), and thus promoted hydrolysis, acidogenesis, and CE processes. Additionally, Fe2+ formed by ICME facilitated orthophosphate removal through precipitation. Microbial community analysis revealed an increase in the number of anaerobic populations associated with hydrolysis and acidogenesis. Overall, this study demonstrated the viability of ICME for promoting MCFAs production from WAS, offering a novel avenue for microelectrolysis-aided resource recovery.","PeriodicalId":7008,"journal":{"name":"ACS ES&T engineering","volume":"5 4","pages":"991–1002 991–1002"},"PeriodicalIF":7.4,"publicationDate":"2024-12-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143814410","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}

引用次数: 0

Response of Exogenous and Indigenous Microorganisms in Alleviating Acetate–Ammonium Coinhibition during Thermophilic Anaerobic Digestion 外源和本地微生物对缓解嗜热厌氧消化过程中醋酸铵共抑制的响应

IF 7.4

ACS ES&T engineering Pub Date : 2024-12-17 DOI: 10.1021/acsestengg.4c0062810.1021/acsestengg.4c00628

Chao Yang, Pinjing He, Hua Zhang and Fan Lü*,

{"title":"Response of Exogenous and Indigenous Microorganisms in Alleviating Acetate–Ammonium Coinhibition during Thermophilic Anaerobic Digestion","authors":"Chao Yang, Pinjing He, Hua Zhang and Fan Lü*, ","doi":"10.1021/acsestengg.4c0062810.1021/acsestengg.4c00628","DOIUrl":"https://doi.org/10.1021/acsestengg.4c00628https://doi.org/10.1021/acsestengg.4c00628","url":null,"abstract":"Bioaugmentation can alleviate the inhibition of acids and ammonia by introducing functional strains in anaerobic digesters, but there is an urgent need to develop functional strains that can be effective under thermophilic anaerobic digesters. The present study constructed a bioaugmentation consortium with four functional strains, namely, Coprothermobacter, Thermacetogenium, Methanothermobacter, and Methanosarcina, to strengthen the synergistic function of syntrophic acetate oxidation and methanogenesis for inhibited thermophilic anaerobic digesters. The result shows that the bioaugmentation with cells constituting only 1.11% (on the basis of VS to VS) of the inoculum led to methane production increasing by 702% at the coinhibition of 3 g/L acetate and 7 g NH4+-N/L, and by 49.5% at the coinhibition of 12 g/L acetate and 4 g NH4+-N/L. Highly tolerant Coprothermobacter contributed to this microbiological domino effect by collaborating with exogenous hydrogenotrophic Methanothermobacter and priming the indigenous syntrophic acetate-oxidizing Syntrophaceticus and hydrogenotrophic Methanoculleus. This bioaugmentation enhanced hydrogenotrophic methanogenesis, evidenced by carbon isotopic signals and an upregulation of the relating genes. Up-regulated genes relating to ion transport and catalyzing energy conversion suggested that this bioaugmentation was favorable to maintain normal cellular osmolality and meet energy demand under inhibited conditions.","PeriodicalId":7008,"journal":{"name":"ACS ES&T engineering","volume":"5 3","pages":"655–665 655–665"},"PeriodicalIF":7.4,"publicationDate":"2024-12-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143608840","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}

引用次数: 0

Role of the TiO2 Crystalline Phase in Pt-TiO2 for Thermocatalytic Mineralization of Gaseous Acetaldehyde TiO2晶相在Pt-TiO2热催化矿化气态乙醛中的作用

IF 7.4

ACS ES&T engineering Pub Date : 2024-12-16 DOI: 10.1021/acsestengg.4c0065410.1021/acsestengg.4c00654

Minhyung Lee, Bupmo Kim, Suho Kim, Hwan Kim, Minjun Park, Wonyong Choi, Wooyul Kim* and Hyoung-il Kim*,

{"title":"Role of the TiO2 Crystalline Phase in Pt-TiO2 for Thermocatalytic Mineralization of Gaseous Acetaldehyde","authors":"Minhyung Lee, Bupmo Kim, Suho Kim, Hwan Kim, Minjun Park, Wonyong Choi, Wooyul Kim* and Hyoung-il Kim*, ","doi":"10.1021/acsestengg.4c0065410.1021/acsestengg.4c00654","DOIUrl":"https://doi.org/10.1021/acsestengg.4c00654https://doi.org/10.1021/acsestengg.4c00654","url":null,"abstract":"Pt-TiO2 is an efficient low-temperature thermocatalyst for volatile organic compound (VOC) removal, driven by active oxygen species formation through metal–support interactions. While the role of Pt is well established, the influence of TiO2 polymorphs on active oxygen generation is less understood. This study explores the thermocatalytic removal of acetaldehyde (CH3CHO) over Pt supported on three TiO2 polymorphs: anatase, rutile, and brookite. CH3CHO mineralization at 160 °C follows the trend: Pt-anatase (99.5%) > Pt-rutile (79.3%) > Pt-brookite (56.7%). These differences correlate with the oxygen adsorption and active oxygen generation capabilities, as evidenced by electrochemical analyses and O2-temperature-programmed desorption. Density functional theory calculations further indicate that Pt supported on anatase has the highest negative charge density, which significantly enhances the formation of active oxygen species. In situ FTIR spectroscopy provides additional evidence by revealing distinct CH3CHO oxidation pathways: *HCOOH on Pt-anatase and Pt-brookite, and *CH3COOH on Pt-rutile. Despite sharing a similar pathway, Pt-anatase displayed faster kinetics due to a higher abundance of surface-active oxygen species. This study highlights the pivotal role of TiO2 polymorphs in shaping metal–support interactions and provides critical insights for designing efficient Pt-based catalysts for thermocatalytic VOC abatement.","PeriodicalId":7008,"journal":{"name":"ACS ES&T engineering","volume":"5 3","pages":"743–755 743–755"},"PeriodicalIF":7.4,"publicationDate":"2024-12-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143608839","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}

引用次数: 0

Ion Transport Channels Created by Anion Exchange Resin in Four-Chamber Flow Electrode Capacitive Deionization Enable Efficient Phosphorus Removal 负离子交换树脂在四室流动电极电容去离子中形成离子传输通道，实现高效除磷

IF 7.4

ACS ES&T engineering Pub Date : 2024-12-16 DOI: 10.1021/acsestengg.4c0072710.1021/acsestengg.4c00727

Shuai Chen, Fan Yang, Sha Liang*, Mingxuan Wen, Zhengkang Zou, Shushan Yuan, Huabo Duan, Wenbo Yu, Jingping Hu and Jiakuan Yang,

{"title":"Ion Transport Channels Created by Anion Exchange Resin in Four-Chamber Flow Electrode Capacitive Deionization Enable Efficient Phosphorus Removal","authors":"Shuai Chen, Fan Yang, Sha Liang*, Mingxuan Wen, Zhengkang Zou, Shushan Yuan, Huabo Duan, Wenbo Yu, Jingping Hu and Jiakuan Yang, ","doi":"10.1021/acsestengg.4c0072710.1021/acsestengg.4c00727","DOIUrl":"https://doi.org/10.1021/acsestengg.4c00727https://doi.org/10.1021/acsestengg.4c00727","url":null,"abstract":"Flow electrode capacitive deionization (FCDI) technology can achieve effective phosphorus (P) removal from wastewater. In this study, a four-chamber FCDI (noted as F-FCDI) system was employed to systematically investigate the effects of P concentrations and pH values of the influent on P removal. It was observed that low influent P concentrations (p ≤ 500 mg/L) and low pH (pH < 2.5) significantly reduced the average phosphorus removal rate (APRR) and charge efficiency (CE) of F-FCDI. To address this issue, a FAD-FCDI system was developed by incorporating anion exchange resin into the diluate chamber of the F-FCDI system. Compared to the F-FCDI system, the FAD-FCDI system showed a 97.3–45.8% increase in APRR and a 103.4–40.0% increase in CE at the influent P concentration of 50–500 mg/L and a 57.3–33.5% increase in APRR and a 51.2–17.3% increase in CE at a pH of 1.6–2.5. The ion transport channels created by the anion exchange resins in the FAD-FCDI system are pivotal for maintaining ion conductivity at low P concentrations. The H+ exclusion effect, along with rapid adsorption of H2PO4– of resin, facilitates the conversion of nonionic H3PO4 to H2PO4– with rapid transportation ability at low pH. The complete mechanisms of electron transfer and ion transport in the FAD-FCDI system were elucidated. This study provides an energy-efficient strategy for the continuous removal of P from wastewater by an FCDI system.","PeriodicalId":7008,"journal":{"name":"ACS ES&T engineering","volume":"5 4","pages":"899–909 899–909"},"PeriodicalIF":7.4,"publicationDate":"2024-12-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143814409","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}

引用次数: 0