ACS ES&T engineering最新文献

{"title":"Green Recovery of Precious Metals from Discarded Waste through a Peroxymonosulfate-Based Homogeneous Fenton-Like System","authors":"Anting Ding,&nbsp;Chenchen Zhu,&nbsp;Chuanying Liu* and Chengliang Xiao*,&nbsp;","doi":"10.1021/acsestengg.4c0067010.1021/acsestengg.4c00670","DOIUrl":"https://doi.org/10.1021/acsestengg.4c00670https://doi.org/10.1021/acsestengg.4c00670","url":null,"abstract":"<p >Precious metal (PM) recovery from discarded waste is essential to mitigate supply risks; however, traditional methods typically cause substantial environmental harm. This study presents a novel leaching process employing a low-concentration peroxymonosulfate (PMS)/CoCl₂ Fenton-like system for the efficient recovery of gold (Au), palladium (Pd), and platinum (Pt) from electronic waste and spent catalysts. Through electron paramagnetic resonance spectroscopy, ¹⁸O isotope tracing, and density functional theory calculations, SO₄·^–, ·OH, and reactive Co species were identified as the primary reactive species responsible for the oxidative dissolution of the PMs. Notably, the spontaneous cycling between Co(II) and Co(III) oxidation states sustained the solution’s reactivity for over 12 consecutive cycles. To demonstrate the efficacy of this method, hectogram quantities of spent Pd/C catalyst were processed, yielding 1.97 g of high-purity Pd. Operating at room temperature and without the need for strong acids or toxic cyanides, this method offers a sustainable alternative for PM recovery. Furthermore, this study highlights the broader potential of advanced oxidation processes for the efficient and environmentally friendly recycling of secondary resources.</p>","PeriodicalId":7008,"journal":{"name":"ACS ES&T engineering","volume":"5 3","pages":"782–791 782–791"},"PeriodicalIF":7.4,"publicationDate":"2025-01-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143608987","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":"Cooking Oil Fumes: A Comprehensive Review of Emission Characteristics and Catalytic Oxidation Strategies","authors":"Ying Feng,&nbsp;Yunpeng Jiang,&nbsp;Mengwei Hua,&nbsp;Zhiquan Hou,&nbsp;Yuxi Liu,&nbsp;Jiguang Deng* and Hongxing Dai*,&nbsp;","doi":"10.1021/acsestengg.4c0067110.1021/acsestengg.4c00671","DOIUrl":"https://doi.org/10.1021/acsestengg.4c00671https://doi.org/10.1021/acsestengg.4c00671","url":null,"abstract":"<p >Cooking oil fumes contain complex particulate matter and volatile organic compounds (VOCs), which pose a significant threat to the atmospheric environment and human health. This review offers a detailed analysis of the chemical compositions and emission characteristics of VOCs from cooking oil fumes and their corresponding treatment methods, with the highlight being put on the current state of catalytic VOC oxidation, which covers the oxidation of various VOCs, including alkanes, aromatics, oxygenated VOCs, and mixed VOCs. The review also explores the types and formation mechanisms of the byproducts of VOC oxidation. Moreover, it offers an in-depth examination of catalytic oxidation performance, mechanisms, and future development directions of various catalysts, including noble-metal-based, transition metal oxide, and rare-earth-doped catalysts. The conclusions drawn from this review can provide useful insights into efficient elimination of VOCs from cooking and related industries.</p>","PeriodicalId":7008,"journal":{"name":"ACS ES&T engineering","volume":"5 2","pages":"303–324 303–324"},"PeriodicalIF":7.4,"publicationDate":"2025-01-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143402323","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":"Skeletal Structure-Based Conditioning for Improved Deep-Dewatering Efficiency of High-Salinity Food Waste Digestate","authors":"Yun-Yan Gao,&nbsp;Yuan-Ping Zeng,&nbsp;Xuan-Xin Chen,&nbsp;Zhi-Yi He,&nbsp;Raymond Jianxiong Zeng* and Hou-Feng Wang*,&nbsp;","doi":"10.1021/acsestengg.4c0060210.1021/acsestengg.4c00602","DOIUrl":"https://doi.org/10.1021/acsestengg.4c00602https://doi.org/10.1021/acsestengg.4c00602","url":null,"abstract":"<p >The solid–liquid separation of food waste anaerobic digestate residue (FD) is a crucial step in maximizing the efficiency and sustainability of anaerobic digestion processes. However, the high salinity and organic content of FD significantly hinder conventional dewatering methods, making deep-dewatering particularly challenging. This study introduces a composite conditioning strategy using basic aluminum chloride (BAC) and a complex quaternary ammonium salt surfactant (G agent) to enhance the digestate’s drainage performance and dewatering efficiency by constructing a skeletal structure within it. Experimental results showed that BAC+G composite conditioning significantly reduced the water content of the digestate from 90.69 ± 0.36 to 54.19 ± 0.16%, achieving deep dewatering that was unattainable with BAC or G agent alone. On a macroscopic scale, the BAC+G treatment enhanced floc strength and increased flocculated particle size to 469.07 ± 0.73 μm, approximately 18 times larger than untreated digestate, which significantly mitigated clogging and improved the permeability coefficient from 2.40 × 10^–6 to 9.79 × 10^–6 cm/s, ensuring smooth water discharge. Microscopically, the treatment increased effective porosity by 34.90%, reduced tortuosity to 1.45, and improved overall permeability (4.41), accelerating water discharge and further enhancing the dewatering performance. Additionally, BAC+G composite conditioning transformed floc particles to hydrophobic, lowered the interfacial free energy, and formed stable structures, further enhancing dewatering performance. These findings demonstrate that combining flocculation with skeletal structure formation is critical for achieving deep-dewatering of a high-salinity food waste digestate. This research provides a promising approach for improving digestate management and could have broader implications for the sustainable treatment of high-moisture organic waste streams.</p>","PeriodicalId":7008,"journal":{"name":"ACS ES&T engineering","volume":"5 3","pages":"620–630 620–630"},"PeriodicalIF":7.4,"publicationDate":"2025-01-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143608985","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":"Advances in Purification of Organic Exhaust via Microbial Electrochemical Systems: Mechanistic Understanding, Performance, and Future Prospects","authors":"Shen Zhang,&nbsp;Jianan Feng,&nbsp;Xinwu Liu,&nbsp;Changsen Zhang,&nbsp;Shunyi Li,&nbsp;Ruiqin Zhang and Panpan Liu*,&nbsp;","doi":"10.1021/acsestengg.4c0058610.1021/acsestengg.4c00586","DOIUrl":"https://doi.org/10.1021/acsestengg.4c00586https://doi.org/10.1021/acsestengg.4c00586","url":null,"abstract":"<p >Industrial exhausts containing volatile organic compounds (VOCs) threaten the atmosphere and human health. Purification of organic exhausts by energy-efficient approaches would be necessary for sustainable industrial production. Recently, microbial electrochemical systems (MES) have emerged as an innovative biotechnological solution for removing VOCs in exhaust by combining microbial metabolism and electrochemical processes. MES and its integration with other technologies, i.e., photocatalysis, biotrickling filter, and electrocatalysis have achieved superior performance for VOCs removal. While nonnegligible gaps still exist in this field relating to industrial application. To get full insight into the development of MES for exhaust purification, this review summarizes working principles on VOCs degradation in various MES and the systematic evaluation of their performances. In addition, a critical review of strategies for improving the performance of MES is introduced. Challenges and future directions are identified for VOCs removal by MES in practical application. This review provides a comprehensive summary of the development of MES for VOCs and facilitates the development of more efficient and sustainable pollution control strategies.</p>","PeriodicalId":7008,"journal":{"name":"ACS ES&T engineering","volume":"5 2","pages":"271–283 271–283"},"PeriodicalIF":7.4,"publicationDate":"2025-01-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143402256","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":"Acid-Resistant Algae Accelerate Biomineralization Driven by Iron-Oxidizing Bacteria in Acid Mine Water through Serving as Electron Shuttles, Iron Ligands, and Seed Crystals","authors":"Long Su,&nbsp;Lanlan Liu,&nbsp;Jingsai Li,&nbsp;Xiang Chen,&nbsp;Di Fang* and Lixiang Zhou,&nbsp;","doi":"10.1021/acsestengg.4c0070610.1021/acsestengg.4c00706","DOIUrl":"https://doi.org/10.1021/acsestengg.4c00706https://doi.org/10.1021/acsestengg.4c00706","url":null,"abstract":"<p >Iron biomineralization driven by chemoautotrophic iron-oxidizing bacteria (e.g., <i>Acidithiobacillus ferrooxidans</i>) facilitates acid mine water remediation but faces considerable technical challenges such as slow Fe(II) oxidation and Fe(III) precipitation. To address these challenges, we used the widely present acid-resistant algae (e.g., <i>Parachlorella kessleri</i>) as a green booster for Fe biomineralization. The assistance of <i>P</i>. <i>kessleri</i> in biomineralization with <i>A. ferrooxidans</i> improved the production of ferric hydroxysulfate minerals (66.2% schwertmannite and 33.8% goethite) in mine water (pH 2.7) with 1.6 and 1.4 times faster rates of Fe(II) oxidation and total soluble Fe precipitation. Mechanistically, algae-secreted extracellular organic matter (EOM), especially CHONS-containing high-molecular-weight (400–650 Da) compounds with low double-bond equivalent (DBE ≤ 10, O/C &lt; 0.2) and high carbon atom (C ≥ 15) (e.g., proteins), acted as electron shuttles with electron accepting and electron donating capacities of 0.9 and 0.7 mmol e^–/g C, respectively, that accelerate electron transfer between Fe(II) and <i>A. ferrooxidan</i> to generate more reactive oxygen species (H₂O₂ and ·OH) for Fe(II) oxidation. Algal EOM could also bond readily with Fe(II) at low pH to form EOM-bound Fe(II). Compared with free Fe(II), EOM-bound Fe(II) was more easily oxidized in the acidic mine water due to its relatively lower Gibbs free energy, higher current intensity, and smaller charge transfer resistance. In Fe(III) precipitation, single spherical algal cells could serve as seed crystals that initiate the heterogeneous nucleation of ferric hydroxysulfate minerals and accelerate their crystallization in mine water by reducing the supersaturation demand. These findings provide new insights into the highly efficient bioremediation of metal-rich acid mine waters with algal-bacterial synergy.</p>","PeriodicalId":7008,"journal":{"name":"ACS ES&T engineering","volume":"5 3","pages":"805–815 805–815"},"PeriodicalIF":7.4,"publicationDate":"2025-01-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143608984","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":"Microbial Iron Utilization Pathways in Constructed Wetlands: Analysis of Substrates Affecting Iron Transformation, Absorption, and Utilization","authors":"Xinyue Zhao,&nbsp;Yibo Shi,&nbsp;Lan Yang and Shih-Hsin Ho*,&nbsp;","doi":"10.1021/acsestengg.4c0044810.1021/acsestengg.4c00448","DOIUrl":"https://doi.org/10.1021/acsestengg.4c00448https://doi.org/10.1021/acsestengg.4c00448","url":null,"abstract":"<p >Iron materials are known to enhance the nitrogen removal efficiency in constructed wetlands (CWs) by coupling iron transformation with nitrogen removal. However, current research lacks detailed explanations of the microbial processes involved in utilizing iron substrates, such as iron transformation, cellular iron uptake, and metabolism, leaving a gap in the understanding of these connections. This study addresses this gap by constructing four microcosm CW systems using Fe–C, various ratios of pyrite, and zerovalent iron (ZVI) as substrates. Experimental results indicated that the iron transformation was the most thermodynamically favorable with pyrite. Microbial communities on pyrite: gravel in a 2:1 volume ratio (2P1G) exhibited a greater propensity for Feammox, with a 0.76% increase in the functional microbial network of Feammox and a 31.20% increase in the abundance of the <i>nirA</i> gene associated with Feammox process compared to the Fe–C group. Conversely, the iron transformation in the Fe–C group was thermodynamically less favorable. To maintain intracellular iron homeostasis, microorganisms in the Fe–C group increased the siderophore activity. The gene abundances related to the release and absorption of siderophore were 22.12% and 17.26% increased, respectively, compared to 2P1G. This research employs the siderophore indicators to elucidate the link between iron transport and nitrogen metabolism, providing insights for improving nitrogen removal in CWs.</p>","PeriodicalId":7008,"journal":{"name":"ACS ES&T engineering","volume":"5 2","pages":"366–376 366–376"},"PeriodicalIF":7.4,"publicationDate":"2025-01-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143402049","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":"Integrating Biological Phosphorus Removal with High-Rate Activated Sludge for Enhanced Settleability and Nutrient Management at Short Solids Retention Times","authors":"Chengpeng Lee,&nbsp;Hau Truong,&nbsp;Khoa Nam Ngo,&nbsp;Ahmed AlSayed,&nbsp;Emily Karen Kin,&nbsp;Stephanie Fuentes,&nbsp;Xiaojue Chen,&nbsp;Haydée De Clippeleir* and George Wells*,&nbsp;","doi":"10.1021/acsestengg.4c0052410.1021/acsestengg.4c00524","DOIUrl":"https://doi.org/10.1021/acsestengg.4c00524https://doi.org/10.1021/acsestengg.4c00524","url":null,"abstract":"<p >High-rate activated sludge (HRAS) processes operate at reduced hydraulic retention time and solids retention time (SRT) to minimize mineralization and enhance sludge digestibility. Enhanced biological phosphorus removal (EBPR) employs phosphorus accumulating organisms (PAOs) to uptake soluble phosphorus from wastewater, preventing nutrient pollution. However, the slow growth rates of PAOs relative to the aggressive SRTs (&lt;2 days) commonly used in HRAS present a potential conflict. This study aims to determine the feasible minimum aerobic SRT that maintains biological phosphorus (bio-P) removal, quantify phosphorus removal through biomass assimilation and bio-P pathways, and assess the impact of bio-P selection on HRAS sludge settleability. Two parallel bioreactors were operated for 246 days with real wastewater supplemented with acetate and phosphate to ensure a consistent feed source; one system was operated as an HRAS without EBPR and the other as an integrated HRAS and EBPR. Significantly, integrating EBPR with HRAS improved sludge settleability, leading to an enhancement in carbon capture. In continuous operation, bio-P performance deteriorated at aerobic SRT below 1.9 days and was strongly influenced by the influent’s volatile fatty acid to phosphorus ratio. Interestingly, Bio-P activity tests demonstrate the feasibility of integrating EBPR with HRAS at aerobic SRT as low as 1.1 days. These results highlight the cobenefits of EBPR integration, including enhanced phosphorus removal, carbon redirection, and settleability, underscoring the high potential for resource recovery from wastewater streams.</p>","PeriodicalId":7008,"journal":{"name":"ACS ES&T engineering","volume":"5 2","pages":"377–388 377–388"},"PeriodicalIF":7.4,"publicationDate":"2025-01-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143402048","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":"Revolutionizing Microalgae Harvesting and Cultivation with Living Membranes: A Leap Forward in Optimized Biomass Recovery and Lipid Production","authors":"Giuseppina Oliva,&nbsp;Antonio Buonerba,&nbsp;Aniello Mariniello,&nbsp;Antonis Zorpas,&nbsp;Chi-Wang Li,&nbsp;Vincenzo Belgiorno,&nbsp;Vincenzo Naddeo* and Tiziano Zarra,&nbsp;","doi":"10.1021/acsestengg.4c0056210.1021/acsestengg.4c00562","DOIUrl":"https://doi.org/10.1021/acsestengg.4c00562https://doi.org/10.1021/acsestengg.4c00562","url":null,"abstract":"<p >A newly designed living membrane filtering module (LMFM) has been applied to promote synergistic cultivation phases and harvesting of <i>Chlorella vulgaris</i> microalgae. The LMFM is based on a living biomembrane intercalated between two woven fabrics made of polyester Dacron that allows an unprecedented simple microalgae recovery from the aqueous cultivation media. A systematic comparison of two systems operated in parallel for biological carbon capture and utilization (bCCU) was executed. The performances of the photobioreactor with a submerged LMFM (membrane photobioreactor, MPBR) were compared to those of a conventional photobioreactor for microalgae cultivation (PBR). PBR and MPBR obtained 92 and 94% carbon dioxide removal yields, respectively. The presence of the membrane did not significantly affect the performance in terms of carbon dioxide removal, which resulted in elimination capacity per stage up to 24.3 ± 4.4 g m^–3 h^–1 in the MPBR. The LMFM indeed afforded a remarkable enhancement in microalgal biomass production and composition in lipids, with lipid concentration up to 36% on dry weight. The produced biomass in the MPBR was almost 80% higher than that obtained in the conventional PBR, and the LMFM allowed an increase of 77% in total lipids. Lipid accumulation was mainly attributed to the increased photon availability in the MPBR. Integrating LMFM in the MPBR enhanced biomass recovery and lipid accumulation, increasing the potentiality of algal-based carbon biofixation as an effective biorefinery technology.</p>","PeriodicalId":7008,"journal":{"name":"ACS ES&T engineering","volume":"5 2","pages":"475–486 475–486"},"PeriodicalIF":7.4,"publicationDate":"2025-01-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143402403","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":"Synthesized Ettringite for Sequestration of Inorganic 14C from the Waste Solution","authors":"Bhupendra Kumar Singh,&nbsp;Nurul Syiffa Mahzan and Wooyong Um*,&nbsp;","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":"<p >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 (CO₃^2–) 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 CO₃^2– and HCO₃^– anions from the waste solution. The mechanism for the sequestration of CO₃^2– and HCO₃^– anions from the waste solution using ettringite suggested that the removal of CO₃^2– 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 CO₃^2– 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.</p>","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}

{"title":"Flash Joule Heating Upgraded Li Leaching of Residues from Spent LiFePO4 Cathodes for Superior Catalytic Degradation of Pollutants","authors":"Hua Shang,&nbsp;Wenting Yang,&nbsp;Zhelin He,&nbsp;Jiewen Luo,&nbsp;Fengbo Yu,&nbsp;Chao Jia and Xiangdong Zhu*,&nbsp;","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":"<p >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.</p>","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}