ACS ES&T engineering最新文献

{"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}

{"title":"Biotic Acid Mine Drainage (AMD) Suppression Using Biogas Slurry: Identification of Key Inhibitory Components and Molecular Inactivation Mechanism of Acidithiobacillus ferrooxidans","authors":"Xin Li,&nbsp;Jing Sun,&nbsp;Shi-jie Yuan,&nbsp;Bin Dong* and Zu-xin Xu,&nbsp;","doi":"10.1021/acsestengg.4c0028710.1021/acsestengg.4c00287","DOIUrl":"https://doi.org/10.1021/acsestengg.4c00287https://doi.org/10.1021/acsestengg.4c00287","url":null,"abstract":"<p >Acid mine drainage (AMD) is a significant environmental challenge, and its treatment can be expensive and complicated. <i>Acidithiobacillus</i> could accelerate the rate of AMD formation by 5–6 orders of magnitude. <i>Acidithiobacillus ferrooxidans</i> (<i>A. ferrooxidans</i>) is the model species of <i>Acidithiobacillus</i>. We initially tried to use the biogas slurry as an organic additive to prevent AMD formation. We determined the essential inhibitory components of the biogas slurry as organic acids (acetic acid (AA), a typical example). The results revealed that AA (≥50 ppm) prevented <i>A. ferrooxidans</i> from forming AMD. The transcriptomic and untargeted metabolomic evaluation found 324 differentially expressed genes and 35 significantly transformed metabolites. Combinatorial omics analysis showed that the presence of AA significantly inhibited the membrane biogenesis, Fe²⁺, and RISC metabolism pathways, reducing energy metabolites such as Fe³⁺ and SO₄^2–. Furthermore, AA treatment induced <i>A. ferrooxidans</i> defense mechanisms and overconsumed its internal carbon sources. These findings proved that biogas slurry had a significant inhibitory effect on key microorganisms in highly acidified mineral soils and provided a scientific foundation for the prevention of acidification and the ecological restoration of newly mined areas.</p>","PeriodicalId":7008,"journal":{"name":"ACS ES&T engineering","volume":"4 12","pages":"2898–2911 2898–2911"},"PeriodicalIF":7.4,"publicationDate":"2024-11-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142844082","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 Peroxydisulfate Activation with Crystalline Iron-Based Ternary Chalcogenides (Fe2GeS4) for Organic Micropollutant Degradation","authors":"Seid Mingizem Gashaw,&nbsp;Aseom Son,&nbsp;Wondesen Workneh Ejerssa,&nbsp;Seung Yong Lee,&nbsp;Seongpil Jeong,&nbsp;Dong Ki Lee,&nbsp;Kangwoo Cho and Seok Won Hong*,&nbsp;","doi":"10.1021/acsestengg.4c0049010.1021/acsestengg.4c00490","DOIUrl":"https://doi.org/10.1021/acsestengg.4c00490https://doi.org/10.1021/acsestengg.4c00490","url":null,"abstract":"<p >Peroxydisulfate (PDS)-based processes are an effective approach for eliminating emerging organic micropollutants (MPs) in (waste)water treatment. Iron-based homogeneous systems are known for their availability, technical and economic feasibility, and relatively nontoxic nature; however, these systems suffer from drawbacks that limit their application. Herein, an iron-based ternary chalcogenide material, Fe₂GeS₄ nanocrystals (FGS NCs), was used to activate PDS for the removal of bisphenol A (BPA). The FGS/PDS system achieved complete removal of BPA at circumneutral pH with a high reaction stoichiometric efficiency (7.8%), outperforming common PDS activators, such as Fe(II), pyrite, zerovalent iron, and black iron oxide. The synergistic enhancement in PDS activation could be attributed to the improved Fe(III)/Fe(II) cycle due to the reduced sulfur and divalent germanium species in the olivine FGS NCs. This finding was confirmed by mechanistic investigations and chromatographic, spectroscopic, and density functional theory studies. Both high-valent iron-oxo (Fe^IV) species (dominant) and sulfate radicals (auxiliary) contributed to BPA transformation, where the solution chemistry (pH, temperature, substrate dose, and anions) influenced the removal of BPA from the FGS/PDS system. Evaluation of the performance of the FGS/PDS system in real water matrices (river water, groundwater, and secondary effluents) revealed its long-term stability and efficiency in removing multiple MPs, including acetaminophen, <i>N,N</i>-diethyl-<i>m</i>-toluamide, perfluorooctanoic acid, 4-chlorophenol, benzotriazole, and ethylparaben. Overall, these findings highlight the potential of FGS/PDS for effective MPs removal in (waste)water treatment.</p>","PeriodicalId":7008,"journal":{"name":"ACS ES&T engineering","volume":"5 1","pages":"191–203 191–203"},"PeriodicalIF":7.4,"publicationDate":"2024-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143091670","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":"Recovering Volatilized Salts from MSWI Fly Ash into Different Metal Species with High Purifies","authors":"YeJia Lv,&nbsp;Zixiang Cai,&nbsp;Huimin Huo*,&nbsp;Guangren Qian,&nbsp;Yang Yue and Jia Zhang*,&nbsp;","doi":"10.1021/acsestengg.4c0055010.1021/acsestengg.4c00550","DOIUrl":"https://doi.org/10.1021/acsestengg.4c00550https://doi.org/10.1021/acsestengg.4c00550","url":null,"abstract":"<p >Thermal sintering/melting technology is a hot topic for the treatment of municipal solid waste incineration with fly ash (FA) nowadays. Most attention is focused on the safety of the treated FA, but seldom focus is put on the separation of thermally volatile metal salts. In this work, we investigated a thermal-sediment control method for effective separation of Zn, Pb, Cu, Cd, K, and Na from FA. Volatilized solids collected from different sediment zones (according to their distances from the FA source) are compared in detail under controlling gas flow rates and heating temperatures. As a result, 52 wt % of Cd and 54 wt % of Pb are first separated in different zones, and 53 wt % of Zn and 52 wt % of Cu are second separated in different zones. Finally, Na and K are recovered together. Pb and Zn purities are as high as 93–94 wt %. What is more, recovery rates of metals from FA follow the order of 90 wt % (Pb) &gt; 83 wt % (Zn) &gt; 81 wt % (Cd) &gt; 77 wt % (Cu) &gt; 73 wt % (Na) &gt; 66 wt % (K). A volatilization-condensation mechanism is put forward to explain the separation of different metal salts. The main result of this work helps the development of the “zero-waste city” concept, which is also in favor of green development and circular economy.</p>","PeriodicalId":7008,"journal":{"name":"ACS ES&T engineering","volume":"5 2","pages":"424–433 424–433"},"PeriodicalIF":7.4,"publicationDate":"2024-10-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143402174","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}