Environmental Technology & Innovation最新文献

{"title":"Hydrogeochemical evolution characteristics of groundwater associated with closed coal mine in karst mountainous area and the impact on irrigation and human health","authors":"Yu Yang ,&nbsp;Bo Li ,&nbsp;Pan Wu ,&nbsp;Pu Liu ,&nbsp;Tao Li ,&nbsp;Ye Luo","doi":"10.1016/j.eti.2026.104752","DOIUrl":"10.1016/j.eti.2026.104752","url":null,"abstract":"<div><div>Acid mine drainage (AMD) leakage represents a serious concern due to its potential to contaminate surface water and groundwater, thereby posing a significant threat to the well-being of residents inhabiting water-stressed karst mountainous regions. This study examines the hydrochemical characteristics and controlling factors of groundwater and surface water around a closed coal mine in Southwest China. Hydrochemical analysis and hydrogen-oxygen isotopes were applied to water samples to assess the impacts of mine drainage on water quality, irrigation suitability, and human health. Results show that the leaked mine water has a pH below 6 and elevated concentrations of SO₄^2-, TDS, Fe, and Al. Groundwater is classified as SO₄·HCO₃-Ca type, whereas surface water is predominantly SO₄-Ca type. The slopes of δD-δ¹⁸O relationship are 6.89 for groundwater and 5.89 for surface water, with corresponding <span>d</span>-excess values of −1.16 ‰ and −2.88 ‰. Hydrochemical evolution is mainly controlled by sulfuric acid weathering of silicate and carbonate rocks (driven by AMD), along with water-rock interaction, evaporation, cation exchange, and anthropogenic inputs. All samples show negative chloro-alkaline indices (CAI &lt; 0). Surface water quality is moderate to poor, whereas groundwater quality is generally medium or better. Principal component analysis identifies total hardness (TH), SO₄^2-, TDS and Na⁺ as the dominant factors affecting water quality, with component loadings &gt; 0.8 and correlation coefficients of 0.84, 0.83, 0.80, and 0.60, respectively. The permeability index (PI) is below 25 % for all surface water samples and for 53.85 % of groundwater samples, indicating that irrigation use may reduce soil permeability. The annual hazard quotient (HQ) for children reaches 3.20 a⁻¹, 1.62 times that for adults, suggesting that direct ingestion of water in study area may pose a significant non-carcinogenic health risk. These findings provide important insights for managing water resources in karst terrains affected by closed mining operations.</div></div>","PeriodicalId":11725,"journal":{"name":"Environmental Technology & Innovation","volume":"41 ","pages":"Article 104752"},"PeriodicalIF":7.1,"publicationDate":"2026-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"146034730","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Ce2Mo3O12/g-C3N4 nanocomposites: Optimization of synthesis parameters, characterization, and study as a potential hydrogen storage material","authors":"Masoud Salavati-Niasari ,&nbsp;Ahmad Akbari ,&nbsp;Elmuez A. Dawi ,&nbsp;Safaa Mustafa Hameed ,&nbsp;Forat H. Alsultany ,&nbsp;Hadil Hussain Hamza","doi":"10.1016/j.eti.2026.104797","DOIUrl":"10.1016/j.eti.2026.104797","url":null,"abstract":"<div><div>In order to improve the electrochemical hydrogen storage capacity, Ce₂Mo₃O₁₂/g-C₃N₄ nanocomposites were synthesized <em>via</em> sonochemical approach with involving desirable electrochemical efficiency, great specific surface area, and special morphology. Herein, the electrochemical hydrogen storage abilities of as-schemed electrodes, namely Ce₂Mo₃O₁₂, g-C₃N₄, and Ce₂Mo₃O₁₂/g-C₃N₄ nanocomposites were studied <em>via</em> chronopotentiometry charge–discharge (CCD) method at constant current. According to the obtained results, the combination effect between the Ce₂Mo₃O₁₂ and g-C₃N₄ can boost the electrochemical hydrogen storage performance in terms of discharge capacity and cycling stability. The maximum value of capacity for Ce₂Mo₃O₁₂/g-C₃N₄ nanocomposites was about 1920.3 mAh/g, which is a significant result as compared to the Ce₂Mo₃O₁₂ (S₃, 1003.2 mAh/g) after 20 cycles. Consequently, the Ce₂Mo₃O₁₂/g-C₃N₄ nanocomposites displayed a worthy capacity as capable active materials for hydrogen storage application.</div></div>","PeriodicalId":11725,"journal":{"name":"Environmental Technology & Innovation","volume":"41 ","pages":"Article 104797"},"PeriodicalIF":7.1,"publicationDate":"2026-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"146074217","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Evaluating and mitigating the adverse effects of halide ions on the sulfamethoxazole degradation in the Co2+/peroxymonosulfate process","authors":"Fei Yang ,&nbsp;Zixuan Zhao ,&nbsp;Ying Liu ,&nbsp;Wenshan Guo ,&nbsp;Xinbo Zhang","doi":"10.1016/j.eti.2025.104674","DOIUrl":"10.1016/j.eti.2025.104674","url":null,"abstract":"<div><div>Halide ions are commonly found in aquaculture wastewater, yet their halide-specific influence on sulfamethoxazole (SMX) degradation within the Co²⁺/peroxymonosulfate (PMS) process requires further investigation to be fully elucidated. This study systematically evaluated the impacts of halides, revealing that trace concentrations of Br⁻ (0.05 mM) significantly enhanced SMX elimination kinetics, achieving rate constants ∼12 times higher than with Cl⁻ (50 mM) and ∼4.5 times higher than in the baseline Co²⁺/PMS system. The significant enhancement observed with Br⁻ is attributed to the selective singlet oxygen (¹O₂)-mediated oxidation of SMX. However, the formation of halogenated aromatic products and the ecotoxicity of dimeric by-products in the presence of Br⁻ warranted attention. This adverse effect was effectively mitigated through the strategic addition of sulfamic acid (0.1 mM) as a selective inhibitor. A possible degradation pathway of SMX in the Co²⁺/PMS system was proposed. These findings establish a quantitative framework for optimizing the Co²⁺/PMS process, enabling effective degradation of sulfonamide antibiotics in halide-rich wastewater while minimizing ecotoxicological risks through targeted pathway control.</div></div>","PeriodicalId":11725,"journal":{"name":"Environmental Technology & Innovation","volume":"41 ","pages":"Article 104674"},"PeriodicalIF":7.1,"publicationDate":"2026-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145693015","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Application of citrus tree pruning residues in wood ear mushroom cultivation: Fate of pesticides and fruitbody safety","authors":"Shota Uchizono ,&nbsp;Fumio Yagi ,&nbsp;Shinnosuke Miyahara ,&nbsp;Masayoshi Yamada ,&nbsp;Takashi Yamaguchi ,&nbsp;Kyohei Kuroda ,&nbsp;Masahito Yamauchi","doi":"10.1016/j.eti.2025.104701","DOIUrl":"10.1016/j.eti.2025.104701","url":null,"abstract":"<div><div>Citrus pruning generates tens of millions of tons of biomass annually, representing an underutilized resource with potential for value-added production through mushroom cultivation. However, the extensive use of pesticides in citrus orchards, which involves the application of about 200 different pesticides, raises concerns about the potential transfer of pesticide from the pruning residues used as growth substrate to the mushroom fruit bodies. To assess the feasibility and safety of using this resource, wood ear mushroom (<em>Auricularia polytricha</em>) were cultivated on a medium composed of 85 % citrus pruning residues and 10 % sweet potato shochu lees. Mushroom fruitbody yield grown on this medium was comparable to that of the control medium of broadleaf tree sawdust and rice bran. Fruitbody composition showed slightly higher protein content and lower carbohydrate levels when grown on the pruning residue-based medium. After mycelial growth, six pesticides were detected in the mushroom medium, but only boscalid was found in the fruitbodies at trace levels of 0.003 ppm (fresh basis). These results demonstrate the potential of citrus pruning residues, in combination with sweet potato shochu lees, as a safe sustainable substrate for wood ear mushroom cultivation.</div></div>","PeriodicalId":11725,"journal":{"name":"Environmental Technology & Innovation","volume":"41 ","pages":"Article 104701"},"PeriodicalIF":7.1,"publicationDate":"2026-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145798521","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Mitigating arsenic contamination and boosting rice yield with natural and anthropogenic H2O2 sources","authors":"Yunji Wang ,&nbsp;Lin An ,&nbsp;Liji Chen ,&nbsp;Kaiqing Fan ,&nbsp;Jidong Ying ,&nbsp;Chuxia Lin ,&nbsp;Junhao Qin ,&nbsp;Rongliang Qiu","doi":"10.1016/j.eti.2026.104768","DOIUrl":"10.1016/j.eti.2026.104768","url":null,"abstract":"<div><div>Mitigating arsenic (As) accumulation in rice while maintaining yield is a critical challenge for food safety. This study demonstrates that in-situ reactive oxygen species (ROS) generation, driven by hydrogen peroxide (H₂O₂) from natural rain and anthropogenic source (urea hydrogen peroxide, UHP), effectively addresses this challenge. A pot experiment revealed that both H₂O₂ sources, especially UHP, significantly induced in-situ production of ROS levels (H₂O₂ and hydroxyl radicals (•OH). The ROS burst effectively suppressed the mobility of As by oxidizing 57–83 % of the mobile As(III) to the less bioavailable As(V) in soil porewater during the heading stage, thereby significantly reduced As accumulation in both aboveground and belowground tissues by 15.3–34.7 %. Critically, total As concentration in rice grains was markedly decreased by 17.7–30.1 % under both H₂O₂ sources, with UHP being more effective than rain, and showed significant negative correlations with both H₂O₂ and •OH levels. Simultaneously, rice yield was significantly improved, showing the greatest enhancement under UHP amendment, and demonstrating a strong positive correlation with ROS levels. These findings confirm that H₂O₂-driven ROS generation, particularly from UHP amendment, provides a promising in-situ strategy for the dual goals of reducing grain As accumulation and enhancing yield in As-contaminated paddy fields.</div></div>","PeriodicalId":11725,"journal":{"name":"Environmental Technology & Innovation","volume":"41 ","pages":"Article 104768"},"PeriodicalIF":7.1,"publicationDate":"2026-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"146074218","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Exploring the intrinsic mechanism of the effects of multicomponent gases on methane oxidation under explosion condition","authors":"Shuangli Du ,&nbsp;Jiahui Qi ,&nbsp;Huan Zhang ,&nbsp;Jiabao Qi ,&nbsp;Yitao Li ,&nbsp;Mingji Ding","doi":"10.1016/j.eti.2026.104796","DOIUrl":"10.1016/j.eti.2026.104796","url":null,"abstract":"<div><div>To improve mine safety and production efficiency, it is essential to thoroughly understand the intrinsic mechanisms by which the mine environment affects methane (CH₄) explosions. This study explores the processes of chain initiation and the critical elementary reactions in CH₄ oxidation under varying temperatures and environmental conditions (O₂/CO/CO₂/H₂O) through reactive molecular dynamics simulations. The findings suggest that in CO/CO₂ atmospheres, CO plays a dominant role in initiating the chain reaction for CH₄ explosions. Additionally, as the concentration of CO decreases, the time required to initiate the CH₄ reaction increases. CO₂ engages in the reaction CO₂ + H → CO + OH (R1) at high temperatures, thereby increasing the concentration of highly reactive OH radicals. In CO/H₂O atmospheres, CO remains a dominant factor in the CH₄ explosion chain initiation, while H₂O enhances the reaction by increasing OH radical content. In CO₂/H₂O atmospheres, the chemical equilibrium effects of CO₂ and H₂O, along with the third-body effect of H₂O, collectively inhibit the CH₄ reaction rate at low temperatures and high CO₂ concentrations. However, at higher temperatures, the reactivities of CO₂ and H₂O are enhanced, generating OH radicals, which accelerates the CH₄ reaction. Furthermore, H₂O competes with CO₂ for H radicals, inhibiting reaction R1.</div></div>","PeriodicalId":11725,"journal":{"name":"Environmental Technology & Innovation","volume":"41 ","pages":"Article 104796"},"PeriodicalIF":7.1,"publicationDate":"2026-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"146074220","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Mechanism of aggravated cardiotoxicity induced by demethylated metabolites of chiral citalopram in zebrafish (Danio rerio)","authors":"Laiyun Zhang ,&nbsp;Liyan Teng ,&nbsp;Liudong Xu ,&nbsp;Feng Cui ,&nbsp;Tingting Chai","doi":"10.1016/j.eti.2025.104680","DOIUrl":"10.1016/j.eti.2025.104680","url":null,"abstract":"<div><div>Citalopram is a widely prescribed selective serotonin reuptake inhibitor used in the treatment of depression and anxiety disorders. Citalopram and its demethylated metabolites have been frequently detected with enantiomer-specific in aquatic environments. The characteristics of chirality and demethylation make citalopram-induced cardiotoxicity more complex. In this study, we carried out an 11-day exposure experiment at an environmentally relevant concentration (500 ng/L), using racemic and individual enantiomers of citalopram, desmethyl-citalopram, and didemethyl-citalopram to assess the differential cardiotoxicity in zebrafish embryo-larvae. Racemic exposure experiments showed that S-enantiomers of citalopram, desmethyl-citalopram, and didemethyl-citalopram were preferentially accumulated over R-enantiomers. S-enantiomer exposure demonstrated that the demethylation behavior occurred, and its demethylated metabolites accumulated. This biotransformation could result from an abnormality of cytochrome P450 gene expression. The demethylated citalopram induced cardiac malformations more severe than those induced by the parent compound in developmental zebrafish, especially induced by S-enantiomers. Dissection of cardiac tissues revealed that S-didemethyl-citalopram exposure induced the worst increase in heartbeats and impaired ejection fraction in developmental zebrafish, which might be mediated by calcium dysregulation and dysfunction of myocardial contractility. Our findings could offer a comprehensive perspective on citalopram-induced cardiotoxicity in non-target aquatic organisms and highlight the importance of metabolic transformation and chirality of environmental pollutants in ecosystem risk assessments.</div></div>","PeriodicalId":11725,"journal":{"name":"Environmental Technology & Innovation","volume":"41 ","pages":"Article 104680"},"PeriodicalIF":7.1,"publicationDate":"2026-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145693016","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"The role of proper deep tillage in balancing soil aggregate stability, salinity, and crop yield in the early stages of salinized farmland improvement","authors":"Zhijie Li ,&nbsp;Yanjie Li ,&nbsp;Ling Li ,&nbsp;Xuyong Yu ,&nbsp;Hongguang Liu ,&nbsp;Ping Gong","doi":"10.1016/j.eti.2026.104744","DOIUrl":"10.1016/j.eti.2026.104744","url":null,"abstract":"<div><div>Deep tillage can reduce soil salinity, improve soil health, and enhance productivity. However, the effects of deep tillage on soil aggregate stability and the mechanisms underlying salinity mitigation remain poorly understood during the early stages of salinized farmland reclamation. This study conducted a two-year experiment (2022–2023) in southern Xinjiang, China, with three tillage treatments: conventional tillage (CT, 20 cm depth), and two deep vertical rotary tillage (DVRT) treatments: continuous DVRT (CDT) and alternating DVRT with CT (DT) at three depths (20, 40, 60 cm). Deep vertical rotary tillage (DVRT) effectively disrupts the plow pan, significantly reducing soil bulk density and enhancing pore connectivity throughout the soil profile. This structural improvement promotes irrigation-driven downward salt migration. Desalination was most pronounced under the CDT40 and CDT60 treatments, with the largest reductions observed in soluble sulfate and chloride ions. DVRT shifted the aggregate-size distribution toward finer fractions, resulting in reduced macro-aggregate proportions and lower mean weight diameter (MWD) and geometric mean diameter (GMD) of aggregates. These changes were primarily driven by mechanical fragmentation and irrigation-induced salt leaching, which reduced root-zone ionic strength and weakened salt-induced flocculation. Electrical conductivity (EC) and salt stock were significantly negatively correlated with crop yield, whereas effective desalination was associated with reduced MWD and GMD and increased yield. However, continuous deep disturbance (CDT), although enhancing early-stage desalination, reduced root-zone water storage due to excessive soil loosening and induced salt re-accumulation during the late growing season. Post-harvest EC in the 0–60 cm soil profile increased by 20 % and 35 % under CDT40 and CDT60, respectively, and EC under CDT60 exceeded that under DT60, ultimately resulting in yield reduction. Overall, the agronomic benefits of DVRT depend on balancing salt removal with root-zone water conservation, and moderate deep tillage is more conducive to achieving stable yield improvement during the early stages of salinized farmland reclamation.</div></div>","PeriodicalId":11725,"journal":{"name":"Environmental Technology & Innovation","volume":"41 ","pages":"Article 104744"},"PeriodicalIF":7.1,"publicationDate":"2026-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145938972","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Effects of sodium dodecyl sulfate (SDS) pollution on carbon and nitrogen cycling driven by microbes in the lake-terrestrial ecotone","authors":"Qi Zhu ,&nbsp;Lingquan Zeng ,&nbsp;Ye Zheng ,&nbsp;Zishu Ye ,&nbsp;Chun Ye ,&nbsp;Chunhua Li","doi":"10.1016/j.eti.2025.104730","DOIUrl":"10.1016/j.eti.2025.104730","url":null,"abstract":"<div><div>In recent years, the concentration of sodium dodecyl sulfate (SDS), a surfactant widely used in daily life and industrial production, has significantly increased in domestic sewage and industrial wastewater. By altering microbial activity, SDS pollution exerts a non-negligible impact on the ability of lake-terrestrial ecotones to intercept and purify pollutants. This study provides novel insights by demonstrating the concentration-dependent effects of SDS on microbial-driven carbon and nitrogen cycling in lake-terrestrial ecotones, advancing beyond previous work through large-scale simulations that link functional gene dynamics to pollutant removal. Results indicated: (1) Rising SDS concentrations stimulated growth of some soil microorganisms in lake-terrestrial ecotones (e.g., <em>Opitutaceae</em> and <em>Burkholderiales</em>), while inhibiting SDS-sensitive microbes (e.g., <em>Nitrospiraceae</em>). (2) Functional genes exhibited differential responses to SDS concentration changes. Functional genes associated with carbon fixation, methane production, nitrogen fixation, and denitrification displayed heightened sensitivity to SDS concentration changes. (3) SDS addition significantly influenced nitrogen transformation processes, manifested as enhanced nitrification and denitrification functions. This drove a dynamic equilibrium between nitrification and denitrification, thereby enhancing the coupling between carbon and nitrogen cycles. (4) At an SDS concentration of 6 mg/L, microbial activity was inhibited, but microbial community structure remained relatively unchanged. When SDS concentration increased to 10 mg/L, the microbial community shifted toward a pollution-tolerant type. This provided a carbon source for microorganisms capable of degrading SDS, thereby enhancing nitrogen cycling processes in the lake-terrestrial ecotone.</div></div>","PeriodicalId":11725,"journal":{"name":"Environmental Technology & Innovation","volume":"41 ","pages":"Article 104730"},"PeriodicalIF":7.1,"publicationDate":"2026-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145939047","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Gas-phase release of 6PPD from tire materials under friction-relevant thermal conditions","authors":"Min-Seok Choi ,&nbsp;Sung-Hwan Kim ,&nbsp;Yong-Hyun Kim","doi":"10.1016/j.eti.2026.104746","DOIUrl":"10.1016/j.eti.2026.104746","url":null,"abstract":"<div><div>N-(1,3-dimethylbutyl)-N′-phenyl-p-phenylenediamine (6PPD) and its toxic oxidation product, 6PPD-quinone, are emerging environmental contaminants of global concern. While current research primarily focuses on particle-bound pathways, the potential for gas-phase release from tire materials under friction-induced thermal conditions remains poorly quantified. This gas-phase pathway is critical as it may facilitate rapid atmospheric conversion to 6PPD-quinone, contributing to complex near-field exposure risks. This study investigated the temperature dependence of gaseous 6PPD emissions using thermal desorption as a proxy for tire-road thermal regimes. Fragments of new tires, used tires, and recycled rubber products were heated isothermally (150–220°C) under an inert gas purge. For new tire fragments, significant emissions began at 190°C and exhibited a sharp, linear increase with temperature (R² &gt; 0.9999). Detectable, albeit lower, temperature-responsive emissions were also observed in tires aged five years and in recycled playground mats, confirming the persistence of releasable 6PPD. Arrhenius-based extrapolation to a representative on-road surface temperature of 60°C suggests a lifetime cumulative gas-phase release of up to 0.543 g per tire. This magnitude is comparable to estimates of the particle-bound pathway (∼1 g per tire). However, it must be noted that these values are derived from accelerated high-temperature tests and represent an upper-bound emission potential; actual on-road fluxes will be influenced by specific aerodynamic and oxidative boundary conditions. Nonetheless, these findings indicate that the gas-phase pathway is likely significant and warrants inclusion in future exposure and risk assessment frameworks.</div></div>","PeriodicalId":11725,"journal":{"name":"Environmental Technology & Innovation","volume":"41 ","pages":"Article 104746"},"PeriodicalIF":7.1,"publicationDate":"2026-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145939506","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}