ACS ES&T engineering最新文献_第4页

Synthesized Ettringite for Sequestration of Inorganic 14C from the Waste Solution 合成钙矾石吸附废液中无机14C的研究

IF 7.4

ACS ES&T engineering Pub Date : 2025-01-09 DOI: 10.1021/acsestengg.4c0068210.1021/acsestengg.4c00682

Bhupendra Kumar Singh, Nurul Syiffa Mahzan and Wooyong Um*,

{"title":"Synthesized Ettringite for Sequestration of Inorganic 14C from the Waste Solution","authors":"Bhupendra Kumar Singh, Nurul Syiffa Mahzan and Wooyong Um*, ","doi":"10.1021/acsestengg.4c0068210.1021/acsestengg.4c00682","DOIUrl":"https://doi.org/10.1021/acsestengg.4c00682https://doi.org/10.1021/acsestengg.4c00682","url":null,"abstract":"Carbon-14 (14C), a radionuclide generated in a nuclear power plant’s operation, is a serious environmental threat due to its long half-life (5730 years) and potential mobility in the environment. Herein, we present the sequestration behavior of inorganic 14C as carbonate (CO32–) and bicarbonate (HCO3–) species from a simulated waste solution using synthesized ettringite under various experimental conditions. The ettringite was synthesized via the solution route and characterized by XRD, FT-IR, N2 adsorption/desorption isotherms, and FE-SEM/EDS analyses. Synthesized ettringite exhibited an efficient inorganic 14C removal capacity (∼92–94%) as compared to CO32– and HCO3– anions from the waste solution. The mechanism for the sequestration of CO32– and HCO3– anions from the waste solution using ettringite suggested that the removal of CO32– and HCO3– anions was achieved via ligand exchange and framework dissolution–precipitation, respectively. To investigate the 14C retention capacity onto ettringite, the study also performed desorption experiments in simulated groundwater (SGW) and the obtained results suggested that the desorption % of both anions was significantly lowered (7 and 4.5% for HCO3– and CO32– anions, respectively) in SGW. We believe that our results will be highly significant in interpreting the immobilization behavior of dissolved inorganic 14C as bicarbonate and carbonate anions present in alkaline waste solutions/aqueous environments.","PeriodicalId":7008,"journal":{"name":"ACS ES&T engineering","volume":"5 3","pages":"792–804 792–804"},"PeriodicalIF":7.4,"publicationDate":"2025-01-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143608982","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

Flash Joule Heating Upgraded Li Leaching of Residues from Spent LiFePO4 Cathodes for Superior Catalytic Degradation of Pollutants 闪蒸焦耳加热对废LiFePO4阴极渣中Li浸出的影响

IF 7.4

ACS ES&T engineering Pub Date : 2025-01-08 DOI: 10.1021/acsestengg.4c0064510.1021/acsestengg.4c00645

Hua Shang, Wenting Yang, Zhelin He, Jiewen Luo, Fengbo Yu, Chao Jia and Xiangdong Zhu*,

{"title":"Flash Joule Heating Upgraded Li Leaching of Residues from Spent LiFePO4 Cathodes for Superior Catalytic Degradation of Pollutants","authors":"Hua Shang, Wenting Yang, Zhelin He, Jiewen Luo, Fengbo Yu, Chao Jia and Xiangdong Zhu*, ","doi":"10.1021/acsestengg.4c0064510.1021/acsestengg.4c00645","DOIUrl":"https://doi.org/10.1021/acsestengg.4c00645https://doi.org/10.1021/acsestengg.4c00645","url":null,"abstract":"The rapid development of new energy sources has produced large quantities of battery-derived spent LiFePO4 cathodes (SLICs), whose recycling has attracted growing attention in recent years. Previous SLICs recycling approaches have focused on the recovery of Li resources, neglecting the Fe-enriched residues obtained after Li recovery. Generally, Fe-enriched residues cannot be effectively converted to active Fe species using traditional methods, thereby limiting their upgrading. This study uses the emerging flash Joule heating (FJH) technology to upgrade Fe-enriched residues, and its performance was independent of Li leaching pathways. Common Li leaching protocols were initially applied to extract Li and produce residues enriched with FeC2O4, FeO(OH), FePO4, and Fe3O4. Subsequently, ultrahigh temperature and electrical stripping were performed by FJH treatment, promoting Fe–O bond breakage within the various Fe phases and generating low-coordinated Fe0 nanoparticles, as confirmed by extended X-ray absorption fine structure analysis. The unique low-coordinated Fe0 nanoparticles present in the FJH-derived composites promoted the enhanced catalytic degradation of chloramphenicol following peroxydisulfate activation, in relation to that achieved through traditional pyrolysis-derived composites. Furthermore, the developed continuous FJH process demonstrated the potential for the large-scale recycling of Fe-enriched residues and promoted the conversion of Fe-enriched residues after Li recovery.","PeriodicalId":7008,"journal":{"name":"ACS ES&T engineering","volume":"5 3","pages":"724–731 724–731"},"PeriodicalIF":7.4,"publicationDate":"2025-01-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143608981","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

A Modified Donnan Dialysis Process Using Sacrificial Magnesium Plates to Improve Phosphorus Recovery and Capture Ammonium and Potassium for Use as a Liquid Fertilizer 牺牲镁板改良Donnan透析工艺提高磷回收率和捕获铵钾作为液体肥料

IF 7.4

ACS ES&T engineering Pub Date : 2025-01-08 DOI: 10.1021/acsestengg.4c0072410.1021/acsestengg.4c00724

Amir Akbari, Lauren F. Greenlee and Bruce E. Logan*,

{"title":"A Modified Donnan Dialysis Process Using Sacrificial Magnesium Plates to Improve Phosphorus Recovery and Capture Ammonium and Potassium for Use as a Liquid Fertilizer","authors":"Amir Akbari, Lauren F. Greenlee and Bruce E. Logan*, ","doi":"10.1021/acsestengg.4c0072410.1021/acsestengg.4c00724","DOIUrl":"https://doi.org/10.1021/acsestengg.4c00724https://doi.org/10.1021/acsestengg.4c00724","url":null,"abstract":"Donnan dialysis (DD) processes can be used to leverage the electrochemical potential gradient across ion exchange membranes to recover targeted nutrients from liquid waste streams. However, the slow separation rate of diffusion-based systems limits their practical applications. To accelerate phosphorus recovery rates, we used a modified Donnan dialysis (MDD) system that incorporated a sacrificial magnesium (Mg(s)) plate in the feed chamber. Using a second adjoining chamber, we simultaneously recovered ammonium (NH4+) and potassium (K+) transported across the cation exchange membrane (CEM), producing a solution that could be used as a liquid fertilizer. Comparisons between MDD and DD across 1×, 5×, and 10× feed concentrations demonstrated that the MDD system captured P efficiently, achieving removal efficiencies of up to 99.6% within 60 min, primarily as struvite (plate surface area to reactor volume ratio of 8.9 m²/m³). Despite a slight reduction in K+ and NH4+ diffusion through the CEM due to struvite reactions in the feed, the simultaneous capture of K+ and NH4+ in the solid and liquid phases improved their overall recovery by up to 33.6%. These results show the feasibility of the MDD process, which offers both solid and liquid fertilizers from a single operation with improved P recovery rates.","PeriodicalId":7008,"journal":{"name":"ACS ES&T engineering","volume":"5 4","pages":"922–931 922–931"},"PeriodicalIF":7.4,"publicationDate":"2025-01-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143814457","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

Photothermal Approach on Chemical Looping Method for Reverse Water Gas Shift Reaction Using Defective Molybdenum Oxide 缺陷氧化钼反水气转换反应化学环法的光热研究

IF 7.4

ACS ES&T engineering Pub Date : 2025-01-07 DOI: 10.1021/acsestengg.4c0070710.1021/acsestengg.4c00707

Daichi Takami, Taku Kishimura, Yasutaka Kuwahara* and Hiromi Yamashita*,

{"title":"Photothermal Approach on Chemical Looping Method for Reverse Water Gas Shift Reaction Using Defective Molybdenum Oxide","authors":"Daichi Takami, Taku Kishimura, Yasutaka Kuwahara* and Hiromi Yamashita*, ","doi":"10.1021/acsestengg.4c0070710.1021/acsestengg.4c00707","DOIUrl":"https://doi.org/10.1021/acsestengg.4c00707https://doi.org/10.1021/acsestengg.4c00707","url":null,"abstract":"CO2 conversion technologies utilizing solar light have garnered significant attention for establishing sustainable societies. Despite the extensive investigation of photothermal approaches, the effect of direct light irradiation on oxygen carriers on the reverse water gas shift chemical looping (RWGS-CL) reaction has not yet been explored. In this study, we investigated the effects of light irradiation on the activity of Pt-loaded metal oxides in the RWGS-CL reaction at 473 K. The Pt/MoO3–x material exhibited remarkable activity for the photo-assisted RWGS-CL reaction, which was attributed to its high concentration of oxygen vacancies and photothermal property. Moreover, it is notable that the light-induced heating was more effective than uniform heating in the exothermic H2-reduction step due to the preferable temperature gradient in the material. This study opens up new potentials for the photothermal-assisted CL method, including the separation of the endothermic and exothermic processes of reactions and the strategic use of light-induced temperature gradients.","PeriodicalId":7008,"journal":{"name":"ACS ES&T engineering","volume":"5 4","pages":"864–873 864–873"},"PeriodicalIF":7.4,"publicationDate":"2025-01-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143814456","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

Sustainable Removal of Aqueous Hg(II) by Zeolitic Imidazolate Framework-Derived Co/NC Using Optimized Thermal Desorption 沸石咪唑酸框架衍生的Co/NC对水中汞（II）的持续去除

IF 7.4

ACS ES&T engineering Pub Date : 2025-01-04 DOI: 10.1021/acsestengg.4c0062610.1021/acsestengg.4c00626

Meiirzhan Nurmyrza, Seunghee Han and Woojin Lee*,

{"title":"Sustainable Removal of Aqueous Hg(II) by Zeolitic Imidazolate Framework-Derived Co/NC Using Optimized Thermal Desorption","authors":"Meiirzhan Nurmyrza, Seunghee Han and Woojin Lee*, ","doi":"10.1021/acsestengg.4c0062610.1021/acsestengg.4c00626","DOIUrl":"https://doi.org/10.1021/acsestengg.4c00626https://doi.org/10.1021/acsestengg.4c00626","url":null,"abstract":"The effectiveness of materials in aqueous contaminant treatment technologies by sorptive removal relies on their ability to be reused and their removal efficiency. Thermal desorption stands out as a promising method to improve the reusability of these materials. In this study, Zeolitic Imidazolate Framework-67 (ZIF-67) derived Cobalt N-Doped Carbon (Co/NC) and metal-impregnated (Ru, Pt, and Pd) Co/NC nanoparticles have been synthesized and tested for the effective removal of aqueous Hg(II) and its reusability by thermal desorption. Reduced Co/NC efficiently removed Hg(II), adsorbing 99.9% of aqueous Hg(II) in 2.5 min through pyridinic-N adsorption sites and Co0 reducing Hg(0) on the surface. The testing of various metals (Ru, Pt, and Pd) on the surface of Co/NC showed that Pd(4%)-Co/NC achieved the highest reactivity with a maximum adsorption capacity of 49.93 mgg–1 using the Langmuir model. Pd(8%)-Co/NC showed the highest adsorbed Hg(0) (79.1%) and fastest removal kinetics (135.52 g mg–1 min–1). The Pd(4%)-Co/NC catalyst retained its durability and stability, eliminating 99.9% of the aqueous Hg species throughout 10 consecutive cycles. The 80.11% and 85.4% of adsorbed Hg were recovered by thermal desorption at 500 °C on Pd(4%)-Co/NC and Co/NC surfaces, respectively. Pd(4%)-Co/NC displayed notable promise as a sustainable catalyst for Hg(II) reductive removal in wastewater treatment technologies, emphasizing its enduring effectiveness and reuse potential for practical engineering applications.","PeriodicalId":7008,"journal":{"name":"ACS ES&T engineering","volume":"5 3","pages":"678–690 678–690"},"PeriodicalIF":7.4,"publicationDate":"2025-01-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://pubs.acs.org/doi/epdf/10.1021/acsestengg.4c00626","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143609020","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}

引用次数: 0

A Novel AOA-SNDPRr Process for Simultaneous Wastewater Treatment, Phosphorus Recovery, and In Situ Sludge Reduction with Ultralong Sludge Retention Time 一种新型的AOA-SNDPRr工艺，用于同时处理废水，磷回收和超长污泥滞留时间的原位污泥减少

IF 7.4

ACS ES&T engineering Pub Date : 2025-01-04 DOI: 10.1021/acsestengg.4c0081210.1021/acsestengg.4c00812

Qiulai He*, Jinfeng Li, Meng Wang, Zhiyi Xie, Peng Bi, Peng Xu, Jingwei Ma*, Baokun Xu and Hongyu Wang,

{"title":"A Novel AOA-SNDPRr Process for Simultaneous Wastewater Treatment, Phosphorus Recovery, and In Situ Sludge Reduction with Ultralong Sludge Retention Time","authors":"Qiulai He*, Jinfeng Li, Meng Wang, Zhiyi Xie, Peng Bi, Peng Xu, Jingwei Ma*, Baokun Xu and Hongyu Wang, ","doi":"10.1021/acsestengg.4c0081210.1021/acsestengg.4c00812","DOIUrl":"https://doi.org/10.1021/acsestengg.4c00812https://doi.org/10.1021/acsestengg.4c00812","url":null,"abstract":"Successive side-stream phosphorus recovery challenges the stable enhanced biological phosphorus (P) removal process due to stripping of P from sludge. In this study, a novel anaerobic/oxic/anoxic simultaneous nitrification, denitrification, and phosphorus removal integrating side-stream recovery process (AOA-SNDPRr) was proposed and operated under ultralong sludge retention time (SRT, 120–140 d). Results showed that effective and stable carbon, nitrogen, and P removal was obtained. High P contents within sludge (15–30 mg P/g MLSS) were kept even after an 80 day continuous extraction, thus supporting considerable anaerobic P concentrations (10–30 mg/L). Up to 81.60% of influent P was harvested, and in situ sludge reduction by 63.2% was enhanced with a low observed sludge yield (Yobs) of 0.015 g MLSS/g chemical oxygen demand under a 50% extraction ratio. Interestingly, a long-time operation witnessed spontaneous sludge granulation. Abundant extracellular polymeric substances (EPS), particularly viscous polysaccharides (PS), were stimulated. A 16S rDNA sequence demonstrated that overwhelmingly dominated Candidatus_Competibacter soared to 20.18%–25.91% without deteriorating biological P removal. Negligible impact on functional genes for poly-P/Gly synthesis and decomposition was found. Overall, the AOA-SNDPRr process with long SRT was proved to be a sustainable approach targeting three goals of reliable wastewater treatment, efficient phosphorus recovery, and dramatic in situ sludge minimization.","PeriodicalId":7008,"journal":{"name":"ACS ES&T engineering","volume":"5 4","pages":"855–863 855–863"},"PeriodicalIF":7.4,"publicationDate":"2025-01-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143814465","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

Headgroup Dependence and Kinetic Bottlenecks of Gas-Phase Thermal PFAS Destruction 气相PFAS热破坏的头基依赖性和动力学瓶颈

IF 7.4

ACS ES&T engineering Pub Date : 2025-01-02 DOI: 10.1021/acsestengg.4c0072610.1021/acsestengg.4c00726

Jens Blotevogel, Justin P. Joyce, Olivia L. Hill and Anthony K. Rappé*,

{"title":"Headgroup Dependence and Kinetic Bottlenecks of Gas-Phase Thermal PFAS Destruction","authors":"Jens Blotevogel, Justin P. Joyce, Olivia L. Hill and Anthony K. Rappé*, ","doi":"10.1021/acsestengg.4c0072610.1021/acsestengg.4c00726","DOIUrl":"https://doi.org/10.1021/acsestengg.4c00726https://doi.org/10.1021/acsestengg.4c00726","url":null,"abstract":"Recent studies of thermal PFAS destruction have reported seemingly incoherent temperatures and products, often because decomposition pathways are highly dependent on the respective experimental system. Here, we applied highly accurate DLPNO–CCSD(T) coupled cluster calculations to isolate and identify the major processes during thermal PFAS destruction in the gas phase, with relevance to incineration, thermal oxidation, and other thermal treatment technologies in which PFAS and their volatile decomposition products desorb into the gas phase. All investigated perfluoroalkyl acids decompose via unimolecular headgroup loss, either through HF elimination or homolytic bond cleavage as a function of headgroup type. In contrast, all investigated fluorotelomers undergo initial hydrogen abstraction from the characteristic C2H4 moiety by hydroxyl radicals under representative incineration conditions, followed by radical decomposition. Subsequent formation of perfluoroalkanes, including CF4, can then be prevented by supplying sufficient hydrogen donors such as hydrocarbon fuel and water as well as by scavenging released fluorine. This leads to the generation of stable 1H-perfluoroalkanes. While parent PFAS decomposition proceeds at gas-phase temperatures ≤700 °C, carbon–carbon cleavage of 1H-perfluoroalkanes requires up to ∼950 °C at 2 s gas residence time, making this step the kinetic bottleneck on the way to complete thermal PFAS mineralization.","PeriodicalId":7008,"journal":{"name":"ACS ES&T engineering","volume":"5 4","pages":"910–921 910–921"},"PeriodicalIF":7.4,"publicationDate":"2025-01-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143814441","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

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

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