ACS ES&T engineering最新文献

{"title":"Thermal Degradation of Long-Chain Fluorinated Greenhouse Gases: Stability, Byproducts, and Remediation Approaches","authors":"Alireza Arhami Dolatabad,&nbsp;Runze Sun,&nbsp;Jiefei Cao,&nbsp;Jiamin Mai,&nbsp;Xuejia Zhang,&nbsp;Zhentian Lei,&nbsp;Katerina Litvanova,&nbsp;Alena Kubatova and Feng Xiao*,&nbsp;","doi":"10.1021/acsestengg.4c0053510.1021/acsestengg.4c00535","DOIUrl":"https://doi.org/10.1021/acsestengg.4c00535https://doi.org/10.1021/acsestengg.4c00535","url":null,"abstract":"<p >Perfluorocarbons (PFCs) are synthetic industrial chemicals, which, once released into the atmosphere, exhibit strong greenhouse effects. They are also potential products of incomplete degradation of per- and polyfluoroalkyl substances in thermal processes. This study aims to fill a significant gap in the literature regarding the thermal stability of PFCs. Among the PFCs examined, perfluorohept-1-ene (C₇F₁₄) and perfluorooct-1-ene (C₈F₁₆) degraded at temperatures as low as 200 °C, achieving near-complete degradation at approximately 300 °C. The mineralization of these two unsaturated PFCs reached up to ∼40 mol % at temperatures between 300 °C and 500 °C. In contrast, their saturated counterparts required significantly higher temperatures (≥600 °C) for similar levels of degradation and yielded less than 10 mol % fluorine. This disparity is likely due to the hemolytic thermal cleavage of the relatively weak C3–C4 bonds in the unsaturated PFCs, initiating radical-chain reactions that release fluorine. The analysis indicates that the thermal degradation pathways of perfluoroalkenes predominantly involve chain scission and cyclization, leading to the formation of various linear and cyclic byproducts, particularly at temperatures below 500 °C. The addition of granular activated carbon enhanced the thermal mineralization of these PFCs, whereas common commercial catalysts were only moderately effective or ineffective.</p>","PeriodicalId":7008,"journal":{"name":"ACS ES&T engineering","volume":"5 2","pages":"389–401 389–401"},"PeriodicalIF":7.4,"publicationDate":"2024-11-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143402490","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":"Application of Differential Scanning Calorimetry to Assess Molecular Weight Degradation of Poly(butylene Adipate-co-terephthalate)-Based Plastics","authors":"Yvan D. Hernandez-Charpak,&nbsp;Harshal J. Kansara,&nbsp;Thomas A Trabold,&nbsp;Jeffrey S. Lodge,&nbsp;Christopher L. Lewis and Carlos A. Diaz*,&nbsp;","doi":"10.1021/acsestengg.4c0061710.1021/acsestengg.4c00617","DOIUrl":"https://doi.org/10.1021/acsestengg.4c00617https://doi.org/10.1021/acsestengg.4c00617","url":null,"abstract":"<p >The use of biodegradable plastics is increasing as customer expectations toward sustainability are addressed. However, their biodegradation processes, mechanisms, and dynamics in real applications are still not well understood. Commonly available analytical techniques such as differential scanning calorimetry (DSC) and Fourier transform infrared spectroscopy can help to better understand the biodegradation kinetics of biodegradable plastics in different environments, e.g., home compost, industrial compost, and soil. Polymer fragmentation, mainly through hydrolysis, is the first stage of biodegradation. Evaluating the evolution of the molecular weight is a challenging measurement in uncontrolled environments, e.g., open soil or ocean, and requires expensive instrumentation and chemical solvents. This work presents how DSC can be used to evidence plastic degradation (e.g., reduction in molecular weight) of biodegradable polybutylene adipate-<i>co</i>-terephthalate-based plastics in home and industrial compost settings. Significant increases in crystallization temperature, <i>T</i>_<i>C</i>, were found in degraded samples using DSC. This increase in <i>T</i>_<i>C</i> was correlated with a loss in reduced viscosity, a metric widely used to infer polymer molecular weight. A positive monotonic relationship was observed, establishing <i>T</i>_<i>C</i> as a possible indicator of polymer degradation.</p>","PeriodicalId":7008,"journal":{"name":"ACS ES&T engineering","volume":"5 3","pages":"642–654 642–654"},"PeriodicalIF":7.4,"publicationDate":"2024-11-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143609137","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":"Formation of Both Free Hydroxyl Radicals and Surface Oxygen During Catalytic Ozonation by Single-Atom Iron: An Overlooked Pollutant-Dependent Oxidation Mechanism","authors":"Jingdong Yang,&nbsp;Guang-Guo Ying,&nbsp;Deli Wu,&nbsp;Zhimin Ao,&nbsp;Kaimin Shih and Yong Feng*,&nbsp;","doi":"10.1021/acsestengg.4c0052110.1021/acsestengg.4c00521","DOIUrl":"https://doi.org/10.1021/acsestengg.4c00521https://doi.org/10.1021/acsestengg.4c00521","url":null,"abstract":"<p >Single-atom catalysts (SACs) such as iron (Fe) SACs have recently shown great promise for catalytic ozonation, but the major reactive species for pollutant degradation remain unclear. Here, a series of Fe SACs doped in porous nitrogen-doped graphitized carbon (Fe₁@NC, Fe₅@NC, Fe₁₀@NC) were prepared and used as model SACs for catalytic ozonation. It was found that the Fe₅@NC had much greater reactivity for catalytic ozonation than common catalysts, which was ascribed to the abundant catalytic sites including surface oxygen-containing groups and Fe–N₄ moieties. Pretreatment of Fe₅@NC by ozonation for 3 h did not deactivate the material. Accelerated formation of hydroxyl radicals in Fe SACs–O₃ oxidation was verified by electron spin resonance spectroscopy, but quenching tests showed conflicting results. Based on the experimental studies and density functional theory calculations, a pollutant-dependent degradation mechanism involving either free hydroxyl radicals or surface oxygen atoms as oxidizing species was proposed. Surface oxygen atom-dominated oxidation required the pre-adsorption of pollutants onto Fe₅@NC, otherwise, free hydroxyl radical-mediated oxidation occurred. This mechanism is expected to clarify the inconsistency regarding the formation of major reactive species in catalytic ozonation and could deepen our understanding of the catalytic behavior of SACs.</p>","PeriodicalId":7008,"journal":{"name":"ACS ES&T engineering","volume":"5 1","pages":"250–259 250–259"},"PeriodicalIF":7.4,"publicationDate":"2024-11-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143091673","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":"Enhanced CO2 Capture and Utilization through Chemically and Physically Dual-Modified Amino Cellulose Aerogels Integrated with Microalgae-Immobilized Hydrogels","authors":"Sijie Li,&nbsp;Yibin Yu,&nbsp;Jingjing Chang,&nbsp;Zhaozhu Zheng,&nbsp;Gang Li,&nbsp;Xiaoqin Wang* and David L. Kaplan,&nbsp;","doi":"10.1021/acsestengg.4c0059710.1021/acsestengg.4c00597","DOIUrl":"https://doi.org/10.1021/acsestengg.4c00597https://doi.org/10.1021/acsestengg.4c00597","url":null,"abstract":"<p >This study introduces a novel method for CO₂ capture and utilization by integrating chemically and physically dual-modified amino cellulose aerogels with microalgae-immobilized silk fibroin/sodium alginate (SF/SA) composite hydrogels. The modified cellulose aerogels, enhanced with 3-(2-aminoethylamino)propyl-dimethoxymethylsilane (AEAPMDS) and fumed silica-polyethyleneimine (SiO₂@PEI), exhibited significantly improved CO₂ adsorption capacity, mechanical strength, and thermal stability compared to microcrystalline cellulose (MCC) aerogels. This modification addresses the limitations of traditional physical and chemical adsorption methods. The captured CO₂ was effectively utilized by the microalgae embedded in the SF/SA hydrogel, leading to increased growth rates, improved carbon fixation efficiency, and reduced energy consumption during CO₂ capture and storage. Temperature regulation was applied to optimize CO₂ adsorption and desorption, demonstrating the system’s potential for air quality improvement and sustainable bioengineering applications, providing a new strategy to combat climate change.</p>","PeriodicalId":7008,"journal":{"name":"ACS ES&T engineering","volume":"5 2","pages":"551–565 551–565"},"PeriodicalIF":7.4,"publicationDate":"2024-11-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143402169","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":"Electrode Corrosion, pH, and Dissolved Oxygen Dynamics, and Hardness/Silicon Removal during Aluminum Electrocoagulation of Hypersaline Produced Water","authors":"Sanket Joag,&nbsp;Jonathan Kiesewetter and Shankararaman Chellam*,&nbsp;","doi":"10.1021/acsestengg.4c0045910.1021/acsestengg.4c00459","DOIUrl":"https://doi.org/10.1021/acsestengg.4c00459https://doi.org/10.1021/acsestengg.4c00459","url":null,"abstract":"<p >Hypersaline produced water with &gt;100,000 mg/L total dissolved solid concentration arising from unconventional oil and gas operations in the Permian Basin, Texas, was electrocoagulated with an aluminum anode and cathode. Anodic aluminum dissolution, formation of a (hydr)oxide passivation layer, and morphology and physicochemical properties of electrodes pre- and post-electrocoagulation were thoroughly characterized by microscopy, spectroscopy, and electrochemical techniques over a 10-fold variation in current density (2–20 mA/cm²) and a four-fold change in charge loading (CL) (∼270–1080 C/L). In addition to the anticipated oxidative anodic electrodissolution, both electrodes underwent chemical dissolution, leading to super-Faradaic aluminum dosing and lowering the bulk pH, contrary to the oft-cited advantage of electrocoagulation over conventional alum coagulation. The remarkably high concentration of chloride ions (∼68,000 mg/L) significantly influenced anodic dissolution behavior primarily by damaging the passive aluminum oxide layer leading to pitting corrosion. Importantly, organic compounds in the produced water negligibly impacted anodic aluminum (electro)dissolution. Not only the total CL but also the current affected pitting. Passing more current (and higher current densities) increased the chemical dissolution of aluminum, enhancing super-Faradaic behavior, and simultaneously increased the surface area and depth of pits (at constant CL) but had negligible effects on the floc size and morphology. The dependence of pitting and Faradaic efficiency on current constitutes a novel finding and is specific to hypersaline solutions as ohmic overpotentials were insufficient to trigger side reactions. Post-electrocoagulation, electrodes repassivated by consuming dissolved oxygen, resulting in a thicker and more conductive (hydr)oxide layer, characterized as an n-type semiconductor via Mott–Schottky analysis. Electrocoagulation effectively removed silicon (∼90%) by forming aluminosilicate flocs. Calcium and magnesium were removed by cathodic electrodeposition albeit to substantially smaller extents (∼20%) and strontium removal was negligible.</p>","PeriodicalId":7008,"journal":{"name":"ACS ES&T engineering","volume":"5 1","pages":"86–102 86–102"},"PeriodicalIF":7.4,"publicationDate":"2024-11-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://pubs.acs.org/doi/epdf/10.1021/acsestengg.4c00459","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143091835","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":"Enhanced Reactivity and Electron Efficiency of Zerovalent Iron with Various Methods","authors":"Zhen Li,&nbsp;Jinhua Zhang,&nbsp;Jinxiang Li*,&nbsp;Jinyou Shen and Xiaohong Guan*,&nbsp;","doi":"10.1021/acsestengg.4c0055610.1021/acsestengg.4c00556","DOIUrl":"https://doi.org/10.1021/acsestengg.4c00556https://doi.org/10.1021/acsestengg.4c00556","url":null,"abstract":"<p >Over the past 30 years, various methods have been developed for enhancing contaminant removal by zerovalent iron (ZVI), thus accumulating a large amount of quantitative data including the reactivity (<i>k</i>_obs) and electron efficiency (EE). However, comparisons and relationships of the data are still lacking, which hinders the selection and development of ZVI enhancement methods for practical applications. In this review, a large number of <i>k</i>_obs and EE results are systematically summarized and classified into three types based on enhancement mechanisms: regulating iron (hydr)oxide films of ZVI (RIF), accelerating ZVI corrosion (AZC), and coupling of iron reactive species with ZVI (CIRs). Then, the comparisons of <i>k</i>_obs and EE by ZVI along with their enhancement multiples (referred to as <i>R</i>_<i>k</i> and <i>R</i>_EE) were conducted within the context of RIF, AZC, and CIRs. This review identified that in cases where ZVI exhibited low reactivity toward pollutants, it often possessed a high electron efficiency for pollutant reduction and vice versa. Moreover, there existed correlations between lg<i>k</i>_obs (lg<i>R</i>_<i>k</i>) and lgEE (lg<i>R</i>_EE) by ZVI with enhancement methods. These relationships suggest that when both the <i>k</i>_obs (<i>R</i>_<i>k</i>) and EE (<i>R</i>_EE) parameters are known, the other parameter can be predicted to some extent. Finally, this review discussed the effects of the solution chemistry and iron-related compounds on the <i>k</i>_obs (<i>R</i>_<i>k</i>) and EE (<i>R</i>_EE) by ZVI with enhancement methods in detail and outlined their potential research needs in future studies.</p>","PeriodicalId":7008,"journal":{"name":"ACS ES&T engineering","volume":"4 12","pages":"2874–2887 2874–2887"},"PeriodicalIF":7.4,"publicationDate":"2024-11-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142844189","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":"Addition to “Removal of Antibiotic Resistant Bacteria and Genes by UV-Assisted Electrochemical Oxidation on Degenerative TiO2 Nanotube Arrays”","authors":"Siwen Wang,&nbsp;Shasha Yang,&nbsp;Estefanny Quispe,&nbsp;Hannah Yang,&nbsp;Charles Sanfiorenzo,&nbsp;Shane W. Rogers,&nbsp;Kaihang Wang,&nbsp;Yang Yang* and Michael R. Hoffmann*,&nbsp;","doi":"10.1021/acsestengg.4c0074810.1021/acsestengg.4c00748","DOIUrl":"https://doi.org/10.1021/acsestengg.4c00748https://doi.org/10.1021/acsestengg.4c00748","url":null,"abstract":"","PeriodicalId":7008,"journal":{"name":"ACS ES&T engineering","volume":"5 3","pages":"828 828"},"PeriodicalIF":7.4,"publicationDate":"2024-11-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143608833","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":"Realizing Strength-Controllable and Selective Bactericidal Valorization of Hydrothermal Liquefaction Wastewater from Biowaste by Temperature and Feedstock Regulation","authors":"Yueyao Wang,&nbsp;Lei Jiang,&nbsp;Mahmoud M. Ali,&nbsp;Yongdong Xu* and Zhidan Liu*,&nbsp;","doi":"10.1021/acsestengg.4c0038210.1021/acsestengg.4c00382","DOIUrl":"https://doi.org/10.1021/acsestengg.4c00382https://doi.org/10.1021/acsestengg.4c00382","url":null,"abstract":"<p >Hydrothermal liquefaction can convert biowaste into biocrude oil, and its wastewater byproduct (HTL-WP) has been confirmed with a wide antimicrobial spectrum. Here, we engineered strength-controllable and selective bactericides from HTL-WP via regulation of feedstock and operational temperature. Results showed that HTL-WP from different feedstocks exhibited significantly selective inhibition on <i>Escherichia coli</i> and <i>Staphylococcus aureus</i>. Increasing operational temperature showed varied effects on antibacterial strength of HTL-WP from feedstocks with different components. Thereby, HTL feedstocks and temperatures can be used as switches to prepare strength-controllable and selective HTL-WPs, showing significantly selective inhibition on <i>S. aureus</i> with a maximum inhibition zone of 12.08 mm. Meanwhile, we conducted interaction analysis of HTL-WP characterization, component identification, and conversion path to reveal the changing mechanism of HTL-WP components. The mechanism of controllable intensity and selectivity was analyzed from two aspects: feedstock components and target strains. This study preliminarily establishes an approach for achieving targeted regulation of HTL-WP antibacterial intensity, which has significant reference value for the environmental-friendly reuse and functional targeted regulation of wastewater (liquid byproduct) from biowaste conversion in a specialized engineering-oriented perspective. It also provides novel utilization prospects for the valorization treatment of solid biowaste and promote the development and application of HTL technology.</p>","PeriodicalId":7008,"journal":{"name":"ACS ES&T engineering","volume":"4 12","pages":"2949–2963 2949–2963"},"PeriodicalIF":7.4,"publicationDate":"2024-11-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142844185","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":"Multifaceted Synergism of Dual Active Sites in Oxygen Vacancies Enriched Plasmonic Ag-BiOI Nanosheets for Enhanced Piezo-Photocatalytic Degradation of Trimethoprim","authors":"Atif Sial,&nbsp;Ting Gao,&nbsp;Fei Li,&nbsp;Haitao Ren,&nbsp;Abdelkader Labidi,&nbsp;Sarah I. Othman,&nbsp;Hassan Ahmed Rudayni and Chuanyi Wang*,&nbsp;","doi":"10.1021/acsestengg.4c0033810.1021/acsestengg.4c00338","DOIUrl":"https://doi.org/10.1021/acsestengg.4c00338https://doi.org/10.1021/acsestengg.4c00338","url":null,"abstract":"<p >Piezo-photocatalysis offers a promising, chemical-free approach for the efficient and scalable degradation of micropollutants. However, existing piezo-photocatalysts face challenges in optimizing their performance. In this study, oxygen vacancies (OVs) enriched BiOI nanosheets loaded with Ag nanoparticles (NPs) were synthesized to enhance Trimethoprim (TMP) degradation. The 15% Ag-BiOI demonstrated excellent performance, achieving a degradation efficiency of 97% within 60 min and a rate constant (<i>k</i>) of 0.1157 min^–1, which was significantly greater than the piezocatalytic (0.0476 min^–1) and photocatalytic (0.0784 min^–1) one. The synergistic interaction of OVs and Ag improved O₂ adsorption, creating dual active sites (Ag-OV) that promote the generation of active oxidative radicals, such as singlet oxygen (¹O₂) followed by superoxide radical (^·O₂^–) to degrade TMP. Likewise, OVs in BiOI regulated the piezoelectric field and enhanced TMP degradation by providing ample binding sites for surface interaction. The Ag acted as an electron transport channel, reducing charge carrier recombination, while its surface plasmon resonance effect modified the band gap of BiOI, promoting OVs generation to enhance visible light absorption. The toxicity assessment showed that the plasmon-induced piezo-phototronic effect of Ag-BiOI selectively reduces the toxicity of TMP intermediates by converting them into smaller, less-toxic compounds, proposing an ecofriendly approach for efficient and sustainable micropollutant degradation in wastewater treatment.</p>","PeriodicalId":7008,"journal":{"name":"ACS ES&T engineering","volume":"4 12","pages":"2923–2937 2923–2937"},"PeriodicalIF":7.4,"publicationDate":"2024-11-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142850841","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":"Nitrogen-Doped Porous Biochar via Azotobacter chroococcum-Based Nitrogen Fixation for Improved Volatile Organic Compound Adsorption","authors":"Fan Yao,&nbsp;Xiaohong Wang,&nbsp;Guangyi Zhao,&nbsp;Weixiao Peng,&nbsp;Wenfu Zhu,&nbsp;Yuqin Wang,&nbsp;Yujun Jiao,&nbsp;Haomin Huang* and Daiqi Ye,&nbsp;","doi":"10.1021/acsestengg.4c0054110.1021/acsestengg.4c00541","DOIUrl":"https://doi.org/10.1021/acsestengg.4c00541https://doi.org/10.1021/acsestengg.4c00541","url":null,"abstract":"<p >Nitrogen doping has been widely used to prepare porous carbon materials for the adsorption of volatile organic compounds (VOCs). However, in the current research, the nitrogen doping process is limited by the raw materials, and it is difficult to achieve simultaneous and precise synergistic regulation of the pore structure, doping quantity, and doping morphology. Inspired by the carbon–nitrogen cycle in nature, the symbiotic community of nitrogen-fixing microorganisms is an important functional group to regulate the elemental cycle. In this study, a novel biological nitrogen fixation incorporation doped method was proposed, i.e., <i>Azotobacter chroococcum</i> (<i>A. chroococcum</i>) is cultivated on the surface of the biochar and catalyzes the conversion of atmospheric nitrogen (N₂) to fixed nitrogen (NH⁴⁺) by nitrogen-fixing enzymes in the body of <i>A. chroococcum</i>, which leads to the formation of bionitrogen and thereby increases the total nitrogen content (0.99%) in the biochar material. The results showed that the content of pyrrole nitrogen in the material was 73.3% and that it possessed a larger specific surface area (1338.21 m²/g) and mesopore (0.499 cm³/g), which greatly improved its adsorption capacity (182.88 mg/g) for ethyl acetate. In addition, in order to elucidate the microscopic adsorption mechanism for enhanced adsorption performance, systematic theoretical calculations of adsorption amount, adsorption energy, and adsorption isotherm were carried out by molecular simulation. This study innovatively achieved green and safe regulation of biomass precursors by nitrogen-fixing bacteria without increasing the nitrogen source and provided a theoretical basis and technical methods to improve the quality and efficiency of the VOC adsorption materials.</p>","PeriodicalId":7008,"journal":{"name":"ACS ES&T engineering","volume":"5 2","pages":"402–413 402–413"},"PeriodicalIF":7.4,"publicationDate":"2024-11-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143402104","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}