Environmental Technology & Innovation最新文献_第9页

Removal of gaseous volatile organic compounds using zinc chloride-activated cattle manure-derived biochar 利用氯化锌活化牛粪生物炭去除气态挥发性有机化合物

IF 7.1 2区环境科学与生态学 Q1 BIOTECHNOLOGY & APPLIED MICROBIOLOGY

Environmental Technology & Innovation

Pub Date : 2025-12-15 DOI: 10.1016/j.eti.2025.104706

Jiseok Hong, Jeryang Park, Ijung Kim

This study investigates the adsorption performance of cattle manure-derived biochar for volatile organic compound (VOC) removal in a continuous-flow column system. ZnCl₂ pretreatment followed by the pyrolysis at 600 °C produced the most significant increases in both specific surface area and adsorption capacity, as ZnCl₂-enabled dehydration/aromatization, volatilization during pyrolysis, and subsequent ash removal by acid washing collectively developed micropores. The resultant biochar possessed abundant micropores that favor physisorption-dominated VOC uptake through van der Waals interactions and pore filling. As the pyrolysis temperature increased, the unused bed length decreased, indicating improved adsorption efficiency and bed utilization. Kinetic fitting revealed that the intraparticle diffusion model provided the best agreement, confirming that physical adsorption controlled by pore diffusion is the governing mechanism. The Yoon–Nelson and Thomas models precisely predicted the 50 % breakthrough time (τ) and equilibrium adsorption capacity (qₑ), validating their applicability for column design and process scale-up. Moreover, a 10 g biochar column sustained sub-breakthrough VOC concentrations for over two days, demonstrating robust long-term adsorption stability. Overall, these findings highlight that waste-derived ZnCl₂-activated biochar can serve as a sustainable, high-performance, and viable adsorbent for on-site air quality management in livestock environments.

本研究研究了牛粪生物炭在连续流柱系统中对挥发性有机化合物（VOC）的吸附性能。ZnCl 2预处理后在600℃下进行热解，其比表面积和吸附容量的增加最为显著，因为ZnCl 2的脱水/芳化、热解过程中的挥发以及随后的酸洗除灰共同形成了微孔。所得生物炭具有丰富的微孔，有利于通过范德华相互作用和孔隙填充物理吸附主导的VOC吸收。随着热解温度的升高，未使用床长减小，表明吸附效率和床利用率提高。动力学拟合结果表明，颗粒内扩散模型具有较好的一致性，证实了孔隙扩散控制的物理吸附是控制机理。Yoon-Nelson和Thomas模型精确预测了50% %的突破时间（τ）和平衡吸附容量（qₑ），验证了它们在色谱柱设计和工艺放大中的适用性。此外，10 g的生物炭柱可维持低于突破的VOC浓度超过两天，显示出强大的长期吸附稳定性。综上所述，这些研究结果表明，废物来源的ZnCl 2活化生物炭可以作为一种可持续的、高性能的、可行的吸附剂，用于家畜环境的现场空气质量管理。

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引用次数: 0

Application of citrus tree pruning residues in wood ear mushroom cultivation: Fate of pesticides and fruitbody safety 柑橘树修剪残留物在木耳栽培中的应用：农药的命运和子实体的安全

IF 7.1 2区环境科学与生态学 Q1 BIOTECHNOLOGY & APPLIED MICROBIOLOGY

Environmental Technology & Innovation

Pub Date : 2025-12-15 DOI: 10.1016/j.eti.2025.104701

Shota Uchizono , Fumio Yagi , Shinnosuke Miyahara , Masayoshi Yamada , Takashi Yamaguchi , Kyohei Kuroda , Masahito Yamauchi

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 (Auricularia polytricha) 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.

柑橘修剪每年产生数千万吨生物质，这是一种未充分利用的资源，具有通过蘑菇栽培进行增值生产的潜力。然而，柑橘果园中农药的广泛使用，涉及大约200种不同农药的使用，引起了人们对农药可能从用作生长基质的修剪残留物转移到蘑菇果体的担忧。为评价该资源利用的可行性和安全性，在85% %柑橘修剪残渣和10% %甘薯烧酒渣的培养基上培养木耳（Auricularia polytricha）。在该培养基上生长的蘑菇子实体产量与对照培养基阔叶树木屑和米糠相当。在剪枝残基培养基上生长时，子实体的蛋白质含量略高，碳水化合物含量略低。菌丝生长后，蘑菇培养基中检测到6种农药，但子实体中仅检测到boscalid，微量含量为0.003 ppm（新鲜基础）。这些结果表明，柑橘修剪残留物与红薯烧酒叶相结合，具有作为木耳栽培安全可持续基质的潜力。

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引用次数: 0

Indoor particulate matter exposure and ocular damage: Toxicity mechanisms and mitigation strategies 室内颗粒物暴露与眼损伤：毒性机制和缓解策略

IF 7.1 2区环境科学与生态学 Q1 BIOTECHNOLOGY & APPLIED MICROBIOLOGY

Environmental Technology & Innovation

Pub Date : 2025-12-15 DOI: 10.1016/j.eti.2025.104707

Mei Xiong , Quanyong Yi , Longyi Liu , Yuxi Tang , Ji Yang , Hai Liu , Ping Xiang

Indoor particulate matter (PM) has emerged as a significant environmental risk factor for ocular health, yet the molecular mechanisms underlying PM-induced eye damage remain poorly understood. This review aims to synthesize current knowledge on the sources, molecular pathways, and mitigation strategies of indoor PM, with a focus on its ocular toxicity. Recent studies highlight that PM_2.5, due to its small size and high surface-to-volume ratio, penetrates ocular tissues, triggering oxidative stress, endoplasmic reticulum stress, and mitochondrial dysfunction. These processes are key drivers of chronic inflammation and cell death, contributing to conditions such as dry eye disease, glaucoma, and age-related macular degeneration. Notably, ferroptosis, an iron-dependent cell death pathway, has been identified as a critical mechanism in PM-induced retinal damage, offering novel therapeutic targets. Seasonal variations in PM composition further influence its cytotoxicity, with winter PM exhibiting heightened inflammatory potential. To mitigate these risks, a multi-faceted approach combining key pollutants identification, source reduction (e.g., clean energy adoption), engineering controls (e.g., air purifiers), and policy initiatives (e.g., China’s "Coal-to-Gas" program) has demonstrated efficacy in reducing PM-linked ocular disorders. This review underscores the need for interdisciplinary collaboration to translate mechanistic insights into practical interventions, ultimately safeguarding eye health in polluted environments.

室内颗粒物（PM）已成为眼部健康的重要环境风险因素，但PM引起的眼部损伤的分子机制尚不清楚。本综述旨在综合目前关于室内PM的来源、分子途径和缓解策略的知识，重点是其眼部毒性。最近的研究表明，PM2.5由于其体积小、表面积比高，可以穿透眼部组织，引发氧化应激、内质网应激和线粒体功能障碍。这些过程是慢性炎症和细胞死亡的关键驱动因素，导致干眼病、青光眼和年龄相关性黄斑变性等疾病。值得注意的是，铁下垂是一种铁依赖性细胞死亡途径，已被确定为pm诱导的视网膜损伤的关键机制，提供了新的治疗靶点。PM成分的季节性变化进一步影响其细胞毒性，冬季PM表现出更高的炎症潜力。为了减轻这些风险，我们采取了多方面的方法，将关键污染物识别、源头减少（如采用清洁能源）、工程控制（如空气净化器）和政策举措（如中国的“煤制气”计划）结合起来，在减少pm相关的眼部疾病方面已经证明了有效性。这篇综述强调了跨学科合作的必要性，将机制见解转化为实际干预措施，最终保护污染环境中的眼睛健康。

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引用次数: 0

Identification of biobutanol-associated genes and pathway limitations in non-virulent Bacillus anthracis 3B1 through functional genome analysis and fermentation optimization 通过功能基因组分析和发酵优化鉴定无毒炭疽芽孢杆菌3B1生物丁醇相关基因及途径限制

IF 7.1 2区环境科学与生态学 Q1 BIOTECHNOLOGY & APPLIED MICROBIOLOGY

Environmental Technology & Innovation

Pub Date : 2025-12-11 DOI: 10.1016/j.eti.2025.104687

Rosamond Chan , Nia Rossiana , Dedat Prismantoro , Abdullah Bilal Ozturk , Kah-Ooi Chua , Nurul Shamsinah Mohd Suhaimi , Wan Abd Al Qadr Imad Wan-Mohtar , Febri Doni

Biobutanol is a promising biofuel alternative that addresses the energy crisis and reduces the environmental impact of fossil fuels. This study investigates the metabolic potential of Bacillus anthracis 3B1, isolated from rice cultivated under the system of rice intensification (SRI). As a facultative anaerobe, Bacillus anthracis 3B1 may offer greater metabolic flexibility and higher tolerance to butanol compared to strictly anaerobic Clostridium. Further gene annotation revealed that the genome of B. anthracis 3B1 lacks virulence genes such as pag, cya, and lef, indicating that the strain is non-virulent. The study integrates descriptive, exploratory, and experimental approaches by combining whole genome sequencing with the screening of various fermentation factors to optimize biobutanol yields and fermentation efficiency, supporting its application in sustainable bioenergy solutions. Functional genome analysis revealed key genes and enzymes involved in butanol biosynthesis. Annotation using the Rapid Annotations using Subsystems Technology (RAST) platform identified a butanol biosynthesis subsystem. Further functional annotation through Clusters of Orthologous Groups (COG), Gene Ontology (GO), and the Kyoto Encyclopedia of Genes and Genomes (KEGG) via eggNOG-mapper indicated the presence of genes encoding butanol-related enzymes, although KEGG analysis suggested an incomplete pathway. Despite these genomic indicators, no butanol was detected under the tested fermentation conditions. However, the strain produced metabolites such as propanol, ethanol, acetoin, carbon dioxide, and acetic acid. Fermentation experiments showed up to 72.57 % glucose consumption and a 0.5 pH drop, indicating active metabolism. These findings suggest that optimizing fermentation or metabolic engineering may be needed to realize B. anthracis 3B1 butanol potential.

生物丁醇是一种很有前途的生物燃料替代品，可以解决能源危机，减少化石燃料对环境的影响。研究了水稻强化栽培体系下分离的炭疽芽孢杆菌3B1的代谢潜能。作为兼性厌氧菌，与严格厌氧的梭菌相比，炭疽芽孢杆菌3B1可能具有更大的代谢灵活性和对丁醇的耐受性。进一步的基因注释显示，炭疽芽胞杆菌3B1基因组缺乏pag、cya和left等毒力基因，表明该菌株无毒力。该研究将描述、探索和实验相结合，通过全基因组测序和各种发酵因子的筛选来优化生物丁醇产量和发酵效率，支持其在可持续生物能源解决方案中的应用。功能基因组分析揭示了参与丁醇生物合成的关键基因和酶。利用快速标注子系统技术（Rapid Annotations using subsystem Technology， RAST）平台进行标注，确定了丁醇生物合成子系统。通过eggNOG-mapper，通过同源群集群（COG）、基因本体（GO）和京都基因与基因组百科全书（KEGG）进行进一步的功能注释，发现存在编码丁醇相关酶的基因，尽管KEGG分析表明途径不完整。尽管有这些基因组指标，但在测试的发酵条件下没有检测到丁醇。然而，该菌株产生代谢物，如丙醇、乙醇、乙酰、二氧化碳和乙酸。发酵实验显示葡萄糖消耗量高达72.57 %，pH值下降0.5 ，表明代谢活跃。这些发现表明，可能需要优化发酵或代谢工程来实现炭疽芽孢杆菌3B1的丁醇潜力。

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引用次数: 0

Co-valorization of shrimp and tropical wood waste to high-value composites: Fabrication, characterization, and herbicide adsorption studies 虾和热带木材废料的高价值复合材料的共同增值：制造、表征和除草剂吸附研究

IF 7.1 2区环境科学与生态学 Q1 BIOTECHNOLOGY & APPLIED MICROBIOLOGY

Environmental Technology & Innovation

Pub Date : 2025-12-10 DOI: 10.1016/j.eti.2025.104692

Hamant E. France , Julia Pohling , O.L.K. Strong , Tyler M. Roy , Andrew J. Vreugdenhil , Yuana Yesika

The current work underscores the potential of using copious waste streams to fabricate high value composite adsorbents which are then used in environmental remediation. The study investigates the fabrication of nitrogen-enriched adsorbents by the co-valorization of shrimp hydrochar, shrimp chitin, and shrimp shells with a waste wood feedstock, greenheart, by a facile, phosphoric acid activation process. These materials were characterized and subsequently deployed to remove 2,4-dichlorophenoxy acetic acid from model solutions at 50 ppm concentration at pH 7. Shrimp shell and shrimp hydrochar composites were typically mesoporous but shrimp chitin composites were microporous. Specific surface area ranged from 1224 m²/g to 1974 m²/g. Surface nitrogen peaked at 2.94 at% with amine, amide and imide function predominating. The largest specific surface area and greatest nitrogen content of composites was more than 56 % and 5 times greater than the pristine greenheart adsorbent. Nitrogen functionality was uniformly distributed on the composite surface implying that there was homogeneous combination of the co-valorized feedstocks. The shrimp-chitin-greenheart composite was most efficient at removing 2,4-D with a maximum adsorption capacity of 101 mg/g. Maximum adsorption capacities of composites were most strongly correlated with amine groups (0.86), total nitrogen (0.88), total surface nitrogen density (0.90) and specific surface area (0.87), demonstrating that both surface area and nitrogen functionality played a pivotal role in the adsorption. The Freundlich isotherm model best described the adsorption process, implying the heterogeneous nature of adsorption sites. Adsorption was spontaneous and entropically favored and adsorption enthalpies ranged from −12 kJ/mol to −17 kJ/mol indicating that physisorption interactions dominated the adsorption process. These composites, with demonstrated efficacy in removing 2,4-D, are promising environmental remediation materials.

目前的工作强调了利用丰富的废物流制造高价值复合吸附剂的潜力，然后将其用于环境修复。本研究通过简单的磷酸活化工艺，研究了虾烃类、虾甲壳素和虾壳与废木材原料绿心共同增值制备富氮吸附剂的方法。对这些材料进行了表征，随后将其用于在pH为7的情况下，以50 ppm的浓度从模型溶液中去除2,4-二氯苯氧乙酸。虾壳和虾碳氢化合物复合材料是典型的介孔材料，而虾甲壳素复合材料是微孔材料。比表面积为1224 m2/g ~ 1974 m2/g。表面氮的峰值为2.94 at%，以胺、酰胺和亚胺为主。复合材料的最大比表面积和最大含氮量均大于56% %，是原始绿心吸附剂的5倍。氮官能团在复合材料表面分布均匀，说明共价原料的组合是均匀的。虾-几丁质-绿心复合材料去除2,4- d的效率最高，最大吸附量为101 mg/g。复合材料的最大吸附量与胺基（0.86）、总氮（0.88）、总表面氮密度（0.90）和比表面积（0.87）的相关性最强，表明比表面积和氮官能团在吸附过程中起关键作用。Freundlich等温模型最好地描述了吸附过程，暗示了吸附位点的非均相性质。吸附是自发的，熵有利的，吸附焓在−12 ~−17 kJ/mol之间，表明物理吸附作用主导了吸附过程。这些复合材料具有良好的去除2,4- d的效果，是很有前途的环境修复材料。

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引用次数: 0

Enhanced visible light PMS activation through novel direct Z-scheme heterojunction of N-doped TiO2 and O-laden g-C3N4 n掺杂TiO2与o负载g-C3N4的新型直接Z-scheme异质结增强可见光PMS活化

IF 7.1 2区环境科学与生态学 Q1 BIOTECHNOLOGY & APPLIED MICROBIOLOGY

Environmental Technology & Innovation

Pub Date : 2025-12-09 DOI: 10.1016/j.eti.2025.104693

Lixiang Wang , Qiang Ren , Xiaoli Wang

A novel direct Z-scheme heterojunction (NTMO) was synthesized via N-doped TiO₂ and O-doped carbon nitride integration, exhibiting exceptional visible-light photoactivity. Elemental doping narrowed the bandgap and improved the separation efficiency of photo-induced carriers in the heterojunction. Especially, O doping enhanced the adsorption capacity of the heterojunction for PMS, indicating that the presence of O could improve PMS activation through photo-induced electron. The NTMO/PMS system achieved 99.0 % trichloroethylene (TCE) degradation within 1 h 4.7 times and 2.4 times faster than pure TiO₂ and MCN, respectively. Mechanistic studies identified •SO₄^– and h⁺ as dominant reactive species. Furthermore, NTMO exhibited high stability after five cycles of testing. This work provides an efficient visible-light-driven strategy for persistent organic pollutant remediation.

通过n掺杂TiO2和o掺杂氮化碳集成合成了一种新型的直接z型异质结（NTMO），具有优异的可见光活性。元素掺杂可以缩小带隙，提高光致载流子在异质结中的分离效率。特别是O掺杂增强了异质结对PMS的吸附能力，表明O的存在可以通过光致电子提高PMS的活化能力。NTMO/PMS体系在1 h内对三氯乙烯（TCE）的降解率达到99.0 %，分别比纯TiO2和MCN快4.7倍和2.4倍。机理研究表明，•SO4 -和h+是主要的反应物质。此外，经过5次循环测试，NTMO表现出较高的稳定性。这项工作为持久性有机污染物的修复提供了一种有效的可见光驱动策略。

引用次数: 0

Sustainable corncob-derived sulfonated carbon catalysts for recyclable biginelli reactions in palm oil 可持续玉米芯衍生的磺化碳催化剂用于棕榈油的可回收biginelli反应

IF 7.1 2区环境科学与生态学 Q1 BIOTECHNOLOGY & APPLIED MICROBIOLOGY

Environmental Technology & Innovation

Pub Date : 2025-12-09 DOI: 10.1016/j.eti.2025.104691

Pakin Noppawan , Pareenat Waenthongkham , Kanyaphat Torboon , Yuvarat Ngernyen , Supinya Nijpanich , Paveena Laokul , Andrew J. Hunt

This study presents a significant advancement in sustainable catalysis through the development of a sulfonated carbon catalyst derived from agricultural corncob waste for the green synthesis of dihydropyrimidinones (DHPMs) via the Biginelli reaction. Employing a simple, metal-free activation and sulfonation method, the optimized catalyst (SKAC1:1–600) exhibited a high acid site density (1.69 mmol g⁻¹), excellent thermal stability, and outstanding catalytic efficiency, achieving up to 99.65 % yield under mild conditions (115 °C, 8 h). Notably, palm oil was employed as a biodegradable and reusable reaction medium, enabling both the catalyst and solvent to be recycled for at least four cycles with minimal loss in yield. The catalytic platform demonstrated broad substrate compatibility with various aldehydes and β-diketones. Comprehensive characterization (FTIR, XRD, SEM-EDS, TEM, BET, TGA, XPS, and NMR) confirmed the successful surface functionalization anfid structural integrity of the catalyst. Green metrics further highlighted the environmental credentials of the system, with an atom economy of 87–97 %, a low process mass intensity (PMI) of 15–21 g g⁻¹, and an E-factor of 14–20 g g⁻¹. This is the first report to integrate corncob-derived sulfonated carbon and palm oil in a synergistic, waste-to-wealth catalytic system, offering high yield, excellent reusability, and superior green performance. This work establishes a new benchmark in biomass valorization and eco-efficient multicomponent synthesis, providing a scalable and cost-effective solution that aligns with circular economy and green chemistry principles.

Synopsis

A sustainable Biginelli reaction is developed using sulfonated carbon catalysts from corncob waste and recyclable palm oil.

本研究通过开发一种从农业玉米芯废料中提取的磺化碳催化剂，通过Biginelli反应绿色合成二氢嘧啶（DHPMs），在可持续催化方面取得了重大进展。采用简单的无金属活化磺化方法，优化后的催化剂（SKAC1:1-600）具有较高的酸位密度（1.69 mmol g−1）、良好的热稳定性和优异的催化效率，在温和的条件下（115°C, 8 h），产率可达99.65 %。值得注意的是，棕榈油被用作可生物降解和可重复使用的反应介质，使催化剂和溶剂可以循环使用至少四个循环，而产量损失最小。该催化平台与多种醛和β-二酮具有广泛的底物相容性。综合表征（FTIR， XRD, SEM-EDS， TEM， BET， TGA， XPS和NMR）证实了催化剂的成功表面功能化和结构完整性。绿色指标进一步强调了系统的环境证书，原子经济性为87-97 %，低过程质量强度（PMI）为15-21 g g−1，e因子为14-20 g g−1。这是第一个将玉米芯衍生的磺化碳和棕榈油整合在一个协同的废物转化为财富的催化系统中的报告，具有高产量，优异的可重复使用性和卓越的绿色性能。这项工作建立了生物质增值和生态高效多组分合成的新基准，提供了一种符合循环经济和绿色化学原则的可扩展且具有成本效益的解决方案。摘要以玉米芯废料和可回收棕榈油为原料，采用磺化碳作为催化剂，开发了一种可持续的Biginelli反应。

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引用次数: 0

Integrated machine learning frameworks identified serum lipidomic mediators of per- and polyfluoroalkyl substances (PFAS)-associated esophageal cancer risk 综合机器学习框架确定了与全氟烷基物质和多氟烷基物质（PFAS）相关的食管癌风险的血清脂质学介质

IF 7.1 2区环境科学与生态学 Q1 BIOTECHNOLOGY & APPLIED MICROBIOLOGY

Environmental Technology & Innovation

Pub Date : 2025-12-09 DOI: 10.1016/j.eti.2025.104689

Hu Zhang , Wen Xiong , Hong Guo , Ruijun Dong , Bing Wang , Junpeng Xia , Chao Zhao , Qianqian Wang , Qingtong Shi

Per- and polyfluoroalkyl substances (PFAS) are ubiquitous emerging environmental contaminants which carcinogenic potential is attracting increasing concern. However, the systematic investigations on the link between exposure to PFAS and esophageal cancer (EC) risk remained scarce, especially in high incidence regions such as China. We conducted a case-control study including 422 EC cases and healthy controls. Nine PFAS congeners in serum samples were quantified and established the comprehensive lipidomic profiles. The results showed that two legacy PFAS demonstrated independent positive associations: PFOA (OR: 2.14, 95 % CI: 1.18–4.08) and PFOS (OR: 1.92, 95 % CI: 1.16–3.32). Conversely, exposure to PFNA exhibited association with the reduced likelihood of EC (P < 0.05). Notably, the novel PFOS substitute 6:2 Cl-PFESA was also correlated with the increased risk of EC (OR=1.72; 95 %CI: 1.12–2.76). Machine learning analysis consistently identified PFOA, PFOS, Cl-PFESAs as key PFASs distinguishing EC development. BKMR and WQS regression analysis indicated the overall positive correlation between PFAS mixture and EC risk. Lipidomics analysis revealed that fatty acid metabolism disorders were the primary differential lipid metabolic pathways, with serum PFAS levels closely associated with fatty acids (FAs). Among these, FA 16:1, FA 18:1, FA 22:6, and glycerophospholipids demonstrated significant mediation in the link between PFAS exposure and EC risk. This study underscored the critical need for prospective studies to illuminate health implications of PFAS-associated alterations in lipid metabolic reprogramming on EC.

全氟和多氟烷基物质（PFAS）是普遍存在的新型环境污染物，其致癌性日益引起人们的关注。然而，关于PFAS暴露与食管癌（EC）风险之间关系的系统调查仍然很少，特别是在中国等高发地区。我们进行了一项病例对照研究，包括422例EC病例和健康对照。对血清样品中的9个PFAS同源物进行定量分析，建立全面的脂质组学图谱。结果显示，两种遗留的PFAS表现出独立的正相关：PFOA （OR: 2.14, 95 % CI: 1.18-4.08）和PFOS （OR: 1.92, 95 % CI: 1.16-3.32）。相反，PFNA暴露与EC可能性降低相关（P <； 0.05）。值得注意的是，新型全氟辛烷磺酸替代品6:2 Cl-PFESA也与EC风险增加相关（OR=1.72; 95 %CI: 1.12-2.76）。机器学习分析一致地识别出PFOA、PFOS、cl - pfesa是区分EC发展的关键PFASs。BKMR和WQS回归分析显示，PFAS混合物与EC风险总体呈正相关。脂质组学分析显示脂肪酸代谢紊乱是主要的脂质代谢途径，血清PFAS水平与脂肪酸（FAs）密切相关。其中，FA 16:1, FA 18:1， FA 22:6和甘油磷脂在PFAS暴露与EC风险之间具有显著的中介作用。这项研究强调了前瞻性研究的迫切需要，以阐明pfas相关的脂质代谢重编程改变对EC的健康影响。

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引用次数: 0

Spatiotemporal leaching dynamics and mechanistic insights into heavy metal release from ion-adsorbed rare earth tailings under acid rain conditions 酸雨条件下离子吸附稀土尾矿重金属释放的时空浸出动力学及机理研究

IF 7.1 2区环境科学与生态学 Q1 BIOTECHNOLOGY & APPLIED MICROBIOLOGY

Environmental Technology & Innovation

Pub Date : 2025-12-09 DOI: 10.1016/j.eti.2025.104690

Buchan Zhou , Xiaojun Zheng , Sheng Zhang , Zongli Wang , Jie Xiao , Ming Chen

Acid rain not only triggers the release of heavy metals from ion-adsorption rare earth tailings, but also shapes their spatiotemporal distribution, increasing environmental risks. This study investigated the release behavior and spatiotemporal distribution of heavy metals in ion-adsorption rare earth tailings under acid rain conditions using static and column leaching experiments. The analysis indicated that in the tailings of the study area, the concentrations of As, Mn, Pb, Zn, Cd, Cu and Cr reached 35.35、542.68、209.73、178.21、0.82、31.34、82.82 mg⋅kg^⁻1, respectively, which were several times higher than the background values, indicating that mining activities cause serious pollution. Static leaching experiments identified As, Mn, Pb, and Zn as priority pollutants requiring control. Dynamic column leaching studies revealed that, from the time dimension, the heavy metal release process could be clearly divided into two stages: rapid leaching and slow release; from the spatial dimension, it exhibited a "low at the bottom, high at the top" vertical gradient pattern, with the leachate concentrations of As, Mn, Pb, and Zn significantly exceeding environmental limits. The DoseResp model accurately fitted all heavy metal leaching processes. Key factors controlling heavy metal migration included chemical speciation, rainfall pH,

{SO}_{4}^{2 -}

concentration, ammonia nitrogen, and mineral properties, with acid-extractable fractions showing preferential release during leaching. The research findings provide a scientific basis for ecological restoration of ion-adsorption rare earth mines and source control of heavy metal pollution in tailings.

酸雨不仅会触发离子吸附型稀土尾矿中重金属的释放，还会影响其时空分布，增加环境风险。采用静态和柱式浸出试验研究了酸雨条件下离子吸附稀土尾矿中重金属的释放行为和时空分布。分析表明，研究区尾矿中As、Mn、Pb、Zn、Cd、Cu、Cr的浓度分别达到35.35、542.68、209.73、178.21、0.82、31.34、82.82 mg⋅kg⁻1，高于背景值数倍，表明采矿活动造成了严重的污染。静态浸出实验确定砷、锰、铅和锌是需要优先控制的污染物。动态柱浸研究表明，从时间维度上看，重金属释放过程可明确分为快速浸出和缓慢释放两个阶段；从空间维度上看，渗滤液中As、Mn、Pb、Zn的浓度明显超过环境限值，呈现出“下低上高”的垂直梯度格局。DoseResp模型准确地拟合了所有重金属浸出过程。控制重金属迁移的关键因素包括化学形态、降雨pH、SO42−浓度、氨氮和矿物性质，其中酸萃取组分在浸出过程中优先释放。研究结果为离子型稀土矿生态修复和尾矿重金属污染源头治理提供了科学依据。

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引用次数: 0

Heavy metals leaching control in fly ash through cement and chelating agent solidification: A microstructural evolution kinetics study 水泥和螯合剂固化控制粉煤灰重金属浸出：微观组织演化动力学研究

IF 7.1 2区环境科学与生态学 Q1 BIOTECHNOLOGY & APPLIED MICROBIOLOGY

Environmental Technology & Innovation

Pub Date : 2025-12-09 DOI: 10.1016/j.eti.2025.104694

Zongyu Mu , Qingqi Die , Fei Wang , Qifei Huang , Siqi Xu , Yufei Yang , Zhongli Luo

Heavy metals exhibit high leachability in municipal solid waste incineration fly ash (MSWI FA), which brings severe environmental threats. The solidification/stabilization (S/S) of heavy metals can not be achieved by using cement alone to comply with the regulatory standard of China. The study explored the effect and mechanism of S/S heavy metals in FA with different dosages of piperazine chelating agent (TS300) and ordinary Portland cement (OPC525). The kinetic results additionally reveal surface wash-off as the predominant leaching mechanism. This study quantified the regulatory effects of TS300 on physical transport properties of OPC525 matrix through non-reactive tracer technique. Despite the more open pore network, heavy metals were effectively immobilized, mainly due to two synergistic chemical mechanisms: the formation of stable heavy metal–thiol coordination bonds and the crystallographic transformation of hydration products from ettringite to Friedel’s salt. This chemical S/S mechanism enhanced chemical retention factors by 9–3458 fold, demonstrating that the synergistic chemical effects of coordination bond formation and hydration products optimization far exceed traditional physical encapsulation mechanisms. These findings provide new insights into dual-mechanism design strategies for heavy metals S/S.

城市生活垃圾焚烧飞灰中重金属具有高浸出性，对环境造成严重威胁。仅使用水泥不能达到重金属的固化/稳定化（S/S），不能满足中国的监管标准。研究了不同剂量哌嗪螯合剂（TS300）和普通硅酸盐水泥（OPC525）对FA中S/S重金属的影响及其机理。动力学结果还表明，表面冲刷是主要的浸出机制。本研究通过非反应性示踪技术量化了TS300对OPC525基质物理输运特性的调控作用。尽管孔隙网络更开放，但重金属被有效地固定，主要是由于两种协同化学机制：稳定的重金属-硫醇配位键的形成和水化产物从钙矾石到弗里德尔盐的晶体学转变。这种化学S/S机制使化学保留因子提高了9-3458倍，表明配位键形成和水化产物优化的协同化学效应远远超过传统的物理包封机制。这些发现为重金属S/S双机制设计策略提供了新的见解。

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引用次数: 0