Journal of hazardous materials advances最新文献_第3页

O-PAC fate and transport in soils: A comparative study with PAHs under dynamic mode and influence of the flow conditions O-PAC在土壤中的命运和迁移：动态模式及流动条件下与多环芳烃的比较研究

IF 7.7 Q2 ENGINEERING, ENVIRONMENTAL

Journal of hazardous materials advances

Pub Date : 2026-01-10 DOI: 10.1016/j.hazadv.2026.101020

J. Michel-Malfait , O. Bour , X. Berterreche de Mendite , J. Fournier , L. Moncorps , W. Almouallem , S. Dorge , G. Trouve

Oxygenated Polycyclic Aromatic Compounds (O-PACs) have been detected in soils and groundwater at sites polluted by Polycyclic Aromatic Hydrocarbons (PAHs), raising concerns due to their higher toxicity and potential to form larger pollution plumes. This study investigated O-PAC behavior in soils and identified the underlying mechanisms and influencing parameters. Breakthrough curves were generated to characterize the sorption of a PAH (fluorene – FLU) and an O-PAC (9H-fluorenone – FLUone), using soil columns at the laboratory scale. Desorption curves were also measured. These curves were modeled using the HYDRUS-1D model. The effects of pollutant concentration and influent flow rate were studied. Results indicated that FLUone exhibited a lower affinity for the soil matrix compared to FLU. This suggested that upon release from pollution sources in soils, O-PACs could migrate more rapidly to groundwater than PAHs, potentially forming larger pollution plumes. Additionally, the results confirmed that FLUone sorption onto soil was primarily controlled by surface mechanisms, with intra-aggregate diffusion playing a minor role. This finding was supported by the dependency of FLUone sorption on inlet solution concentration and corroborated by the modeling, indicating a lower sensitivity of the number of instantaneous sorption sites to a flow rate change. Nevertheless, results showed that lower O-PAC concentrations were associated with a higher proportion of intra-particle diffusion processes. FLUone sorption was more reversible than FLU sorption, indicating that O-PACs could be preferentially released from polluted soils. All these results highlighted the need to consider O-PACs alongside PAHs in polluted site characterization and monitoring.

在多环芳烃（PAHs）污染的土壤和地下水中检测到氧合多环芳烃（O-PACs），由于其较高的毒性和可能形成更大的污染柱，引起了人们的关注。本研究研究了O-PAC在土壤中的行为，并确定了其潜在机制和影响参数。利用实验室规模的土壤柱，生成突破曲线来表征PAH（芴- FLU）和O-PAC （9h -芴酮- FLUone）的吸附。同时测定了解吸曲线。这些曲线采用HYDRUS-1D模型建模。研究了污染物浓度和进水流量的影响。结果表明，与FLU相比，FLUone对土壤基质的亲和力较低。这表明，在土壤污染源释放后，o - pac比PAHs更快地迁移到地下水中，可能形成更大的污染羽流。此外，研究结果还证实了FLUone在土壤上的吸附主要受表面机制控制，团聚体内扩散起次要作用。这一发现得到了FLUone吸附对进口溶液浓度的依赖性的支持，并得到了模型的证实，表明瞬时吸附位点的数量对流速变化的敏感性较低。然而，结果表明，较低的O-PAC浓度与较高比例的颗粒内扩散过程相关。与FLU吸附相比，FLUone吸附的可逆性更强，表明O-PACs可以优先从污染土壤中释放。所有这些结果都突出了在污染场地的表征和监测中考虑o - pac和多环芳烃的必要性。

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引用次数: 0

Detection and characterization of microplastics in commercial eye drops: A novel ocular exposure pathway 商业滴眼液中微塑料的检测和表征：一种新的眼部暴露途径

IF 7.7 Q2 ENGINEERING, ENVIRONMENTAL

Journal of hazardous materials advances

Pub Date : 2026-01-10 DOI: 10.1016/j.hazadv.2026.101019

Yixiang Que , Zhilei Zhang , Yunchou Wu , Weyland Cheng , Longfei Wang , Yanfan Wang , Yaodong Zhang , Kuo Lu

Microplastics (MPs), as emerging contaminants, have infiltrated various environments and consumer products, and are widely present in human tissues and bodily fluids. Currently, there is limited research on microplastic contamination in pharmaceuticals, particularly in eye drops that directly contact the ocular surface, where the risk of microplastic exposure urgently requires evaluation. This study investigated microplastic contamination in eye drops, aiming to assess the presence of microplastics in over-the-counter eye drops used directly on the ocular surface. The study employed multiple analytical methods, including laser direct infrared spectroscopy (LDIR), pyrolysis gas chromatography-mass spectrometry (Py-GC/MS), and scanning electron microscopy (SEM), to test commercially available eye drop samples. The results revealed that microplastics were present in all tested brands of eye drops, with most particles being smaller than 100 µm and primarily composed of polymers such as polyvinyl chloride (PVC), polyethylene (PE), and polypropylene (PP). Variations in the quantity, type, and morphology of microplastics were observed among different brands, suggesting that production processes or packaging may be sources of contamination. The study indicates that microplastic contamination in eye drops, which are formulations that directly contact the ocular surface, may pose potential risks to ocular health. Current pharmaceutical quality control standards do not yet cover such contaminants, highlighting the urgent need for attention from regulatory authorities, manufacturers, and medical professionals.

微塑料作为一种新兴污染物，已经渗透到各种环境和消费品中，广泛存在于人体组织和体液中。目前，关于药物中微塑料污染的研究有限，特别是直接接触眼表的滴眼液，其中微塑料暴露的风险迫切需要评估。本研究调查了眼药水中的微塑料污染，旨在评估直接用于眼表的非处方眼药水中微塑料的存在。本研究采用多种分析方法，包括激光直接红外光谱（LDIR）、热解气相色谱-质谱（Py-GC/MS）和扫描电子显微镜（SEM），对市售滴眼液样品进行测试。结果显示，所有测试品牌的眼药水中都含有微塑料，大多数颗粒小于100微米，主要由聚氯乙烯（PVC）、聚乙烯（PE）和聚丙烯（PP）等聚合物组成。在不同品牌中观察到微塑料的数量、类型和形态的变化，这表明生产过程或包装可能是污染源。研究表明，眼药水是直接接触眼表的配方，其中的微塑料污染可能对眼部健康构成潜在风险。目前的药品质量控制标准尚未涵盖此类污染物，这突出了监管当局、制造商和医疗专业人员迫切需要予以关注。

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引用次数: 0

Biodegradable cellulosic aerogels for rapid and efficient adsorptive removal of ciprofloxacin and methylene blue from contaminated water 生物可降解纤维素气凝胶快速有效吸附去除污染水中的环丙沙星和亚甲基蓝

IF 7.7 Q2 ENGINEERING, ENVIRONMENTAL

Journal of hazardous materials advances

Pub Date : 2026-01-10 DOI: 10.1016/j.hazadv.2026.101015

Richa Ranjan , Monicka Kullappan , Sarang P. Gumfekar , Manigandan Sabapathy

Once celebrated as milestones of scientific progress, activated pharmaceutical ingredients (APIs) now fuel a growing crisis — their unchecked release into aquatic environments accelerates antimicrobial resistance, endangering human and animal health globally. Conventional remediation strategies often suffer from inefficiency, high operational costs, and limited scalability. Here, we demonstrate cellulosic aerogels, synthesized via a sol–gel process and subsequent lyophilization, as sustainable bio-adsorbents for removing ciprofloxacin (CIP), an API, and methylene blue (MB) from contaminated water. Structural characterization via FESEM and BET analysis confirmed a hierarchical porous network with a specific surface area of

\approx

398 m²/g and large pore volume. Batch adsorption experiments demonstrated highest affinity for CIP and MB, achieving maximum adsorption capacities. The adsorption processes followed pseudo-second-order kinetics with a good correlation coefficient. Mechanistic investigation revealed that adsorption is predominantly governed by strong

π

-

π

stacking interactions between the aromatic structures of ciprofloxacin and the cellulose matrix, supplemented by hydrogen bonding and electrostatic attractions. Additionally, zeta potential measurements indicated a negatively charged surface (-25 ± 2 mV), enhancing interaction with cationic pollutants. Our findings highlight the potential of biodegradable cellulosic aerogels as efficient, low-cost alternatives to synthetic adsorbents, offering a scalable solution for antibiotic removal and broader applications in wastewater treatment technologies.

活性药物成分（原料药）曾被誉为科学进步的里程碑，如今却引发了一场日益严重的危机——它们不加控制地释放到水生环境中，加速了抗菌素耐药性，危及全球人类和动物健康。传统的补救策略通常存在效率低下、操作成本高和可扩展性有限的问题。在这里，我们展示了通过溶胶-凝胶工艺和随后的冻干合成的纤维素气凝胶，作为可持续的生物吸附剂，用于去除污染水中的环丙沙星（CIP）， API和亚甲基蓝（MB）。通过FESEM和BET分析的结构表征证实了一个比表面积≈398 m2/g、孔隙体积大的分层多孔网络。批量吸附实验表明，CIP和MB的亲和力最高，吸附量最大。吸附过程符合准二级动力学，具有良好的相关系数。机理研究表明，环丙沙星的吸附主要由芳香族结构与纤维素基质之间的强π-π堆积相互作用控制，并辅以氢键和静电吸引。此外，zeta电位测量表明表面带负电（-25±2 mV），增强了与阳离子污染物的相互作用。我们的研究结果强调了可生物降解纤维素气凝胶作为合成吸附剂的高效、低成本替代品的潜力，为抗生素去除提供了可扩展的解决方案，并在废水处理技术中得到了更广泛的应用。

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引用次数: 0

Facile hydrothermal fabrication and performance tuning of rGO/LDH nanocomposites for efficient photocatalytic degradation of Congo Red 高效光催化降解刚果红的rGO/LDH纳米复合材料的水热制备及性能调整

IF 7.7 Q2 ENGINEERING, ENVIRONMENTAL

Journal of hazardous materials advances

Pub Date : 2026-01-09 DOI: 10.1016/j.hazadv.2026.101014

Divya Mahar, Nitish Semwal, Tanuja Arya, Mahesh Chandra Arya

Water pollution is a critical global issue intensified by industrialization. The release of toxic organic pollutants severely impacts aquatic ecosystems and public health. This study reports the green hydrothermal synthesis of rGO/Cu/Fe/Al LDH nanocomposites with varying rGO contents and their evaluation for photocatalytic efficiency. To explore the morphology, composition, and optical behavior of the synthesized nanocomposites, a range of analytical tools such as FE-SEM, HR-TEM, XRD, FT-IR, Raman, UV–Vis DRS, TGA, BET, XPS, and zeta potential analyses were employed. Furthermore, Photocatalytic degradation investigations demonstrated that the 3 wt% rGO/LDH nanocomposite exhibited superior degradation efficiency of 98.4% for Congo Red (CR) within 90 min under solar light irradiation. Key experimental factors, including pH, dose of catalyst, contact time, and concentration of dye, were methodically optimized employing the response surface methodology (RSM) coupled with Box-Behnken Design (BBD) approach. The observed pseudo-first-order kinetic rate constant was calculated as 0.0181 min⁻¹. Structural analysis confirmed the nanocomposite’s hydrotalcite-like morphology, accompanied by a high specific surface area (SBET = 213.13 m²/g), pronounced solar light absorption, and a narrow band gap energy (Eg =1.9 eV). Under optimized reaction conditions—0.5 mg/mL catalyst loading, 70 ppm initial dye concentration, and natural solution pH of 5.8, 98.4% degradation of CR was achieved within 90 min. Stability tests revealed that the 3 wt% rGO/LDH nanocomposite maintained 84.9% of its photocatalytic activity after five successive cycles, demonstrating remarkable reusability. The addition of rGO significantly improved the photocatalytic activity of LDH, suggesting its potential for efficient and reusable environmental remediation.

水污染是一个严重的全球性问题，工业化加剧了这一问题。有毒有机污染物的排放严重影响水生生态系统和公众健康。本研究报道了绿色水热合成不同rGO含量的rGO/Cu/Fe/Al LDH纳米复合材料及其光催化效率的评价。为了探索合成的纳米复合材料的形貌、组成和光学行为，使用了一系列分析工具，如FE-SEM、HR-TEM、XRD、FT-IR、Raman、UV-Vis DRS、TGA、BET、XPS和zeta电位分析。此外，光催化降解研究表明，在太阳光照射下，3 wt%的rGO/LDH纳米复合材料在90分钟内对刚果红（CR）的降解效率达到98.4%。采用响应面法（RSM）结合Box-Behnken Design （BBD）方法对pH、催化剂用量、接触时间、染料浓度等关键实验因素进行了系统优化。观察到的伪一级动力学速率常数计算为0.0181 min⁻¹。结构分析证实了纳米复合材料具有类似水滑石的形态，具有高比表面积（SBET = 213.13 m²/g）、明显的太阳能吸收和窄带隙能量（Eg =1.9 eV）。在催化剂负载0.5 mg/mL，初始染料浓度70 ppm，自然溶液pH为5.8的条件下，90 min内CR的降解率达到98.4%。稳定性测试表明，3 wt%的rGO/LDH纳米复合材料在连续5次循环后仍保持84.9%的光催化活性，具有显著的可重复使用性。还原氧化石墨烯的加入显著提高了LDH的光催化活性，表明其具有高效、可重复使用的环境修复潜力。

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引用次数: 0

Detection methods, influencing factors, and formation mechanisms of brake particle emissions from automotive brakes: A review 汽车刹车微粒排放的检测方法、影响因素及形成机理综述

IF 7.7 Q2 ENGINEERING, ENVIRONMENTAL

Journal of hazardous materials advances

Pub Date : 2026-01-09 DOI: 10.1016/j.hazadv.2026.101013

Yaping Duan , Peng Cheng , Zhen Zhang , Kewen Chen , Jie Fei

Brake particles are a major source of non-exhaust emissions from vehicles, with growing concerns regarding their environmental and health impacts. This review systematically examines detection and characterization techniques, along with emerging computational methods such as finite element simulation and machine learning. Key influencing factors like brake structure, material composition, and braking conditions are analyzed in terms of their effects on emission characteristics. The formation mechanisms involve coupled mechanical wear and thermochemical processes, highly dependent on interface states. Finally, future development trends and challenges are outlined, emphasizing intelligent research paradigms integrating experiments, simulations, and data-driven approaches, online monitoring and multi-modal sensing technologies, systematic lifecycle environmental risk assessment, and the need for standardized testing protocols and emission limits. This work offers a structured reference for further research and emission-reduction technologies.

刹车颗粒是车辆非废气排放的主要来源，其对环境和健康的影响日益受到关注。这篇综述系统地研究了检测和表征技术，以及新兴的计算方法，如有限元模拟和机器学习。分析了制动结构、材料组成、制动工况等关键影响因素对排放特性的影响。形成机制涉及耦合的机械磨损和热化学过程，高度依赖于界面状态。最后，概述了未来的发展趋势和挑战，强调了集成实验、模拟和数据驱动方法的智能研究范式，在线监测和多模态传感技术，系统的生命周期环境风险评估，以及标准化测试协议和排放限值的需求。这项工作为进一步的研究和减排技术提供了结构化的参考。

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引用次数: 0

Antioxidant activity and anti-melanogenic of the exopolysaccharide EPS-HuA40 from Mesonia sp. HuA40 Mesonia sp. HuA40胞外多糖EPS-HuA40的抗氧化活性及抗黑素的研究

IF 7.7 Q2 ENGINEERING, ENVIRONMENTAL

Journal of hazardous materials advances

Pub Date : 2026-01-07 DOI: 10.1016/j.hazadv.2026.101012

TingTing Tang , ZhaoLi Li , YuPing Dai , BaiLu Tang , WenZhao Li , Tong Li , Hao Cheng , PingYi Li , HaiLun He

The growing demand for antioxidant and whitening skincare products has driven the development of eco-friendly natural ingredients. Marine microorganisms represent a rich source of novel bioactive molecules. This study investigated the antioxidant and melanogenesis-inhibitory activities of EPS-HuA40, an exopolysaccharide from the marine bacterium Mesonia sp. HuA40. EPS-HuA40 demonstrated significant dose-dependent scavenging activities against multiple free radicals, with a scavenging rate reaching up to 86.05%, which is comparable to that of the positive control antioxidant Vc (88.13%) at the same mass concentration. In HaCaT, HDF, and HUVEC cells, treatment with EPS-HuA40 significantly inhibited the production of intracellular ROS due to oxidative stress, without exhibiting cytotoxicity. And it enhanced the activities of intracellular antioxidant enzymes such as CAT and SOD to bolster cellular antioxidant capacity, protecting cells against adverse environments. Furthermore, EPS-HuA40 effectively reduced α-MSH-induced melanin production in B16-F10 cells by indirectly suppressing tyrosinase activity and downregulating melanogenesis-related gene expression. The results suggested that EPS-HuA40 exhibits significant antioxidant activity and reduces hyperpigmentation. Therefore, it holds potential for future application in skincare formulations.

人们对抗氧化和美白护肤品的需求不断增长，推动了环保天然成分的发展。海洋微生物是新型生物活性分子的丰富来源。本文研究了海洋细菌Mesonia sp. HuA40的胞外多糖EPS-HuA40的抗氧化和抑制黑素生成的活性。EPS-HuA40对多种自由基的清除率表现出明显的剂量依赖性，清除率高达86.05%，与阳性对照抗氧化剂Vc（88.13%）在相同质量浓度下的清除率相当。在HaCaT、HDF和HUVEC细胞中，EPS-HuA40显著抑制了氧化应激引起的细胞内ROS的产生，而没有表现出细胞毒性。它还增强了细胞内抗氧化酶（如CAT和SOD）的活性，增强了细胞的抗氧化能力，保护细胞免受不利环境的影响。此外，EPS-HuA40通过间接抑制酪氨酸酶活性和下调黑色素生成相关基因表达，有效降低α- msh诱导的B16-F10细胞黑色素生成。结果表明，EPS-HuA40具有显著的抗氧化活性，并能抑制色素沉着。因此，它具有潜在的未来应用在护肤配方。

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引用次数: 0

Optimized mechanical performances of eco-friendly particulate wood-plastic composites using poplar, cypress, and Platanaceae: Enhancing tensile, flexural, and impact strength 以杨树、柏树、杏树科为原料，优化环保颗粒木塑复合材料的力学性能：增强拉伸、弯曲和冲击强度

IF 7.7 Q2 ENGINEERING, ENVIRONMENTAL

Journal of hazardous materials advances

Pub Date : 2026-01-07 DOI: 10.1016/j.hazadv.2026.101011

Yasir A. Abdullah , Taher Azdast , Ali Doniavi , Rezgar Hasanzadeh

Wood-plastic composites (WPCs) are recognized for their long lifespan, lightweight design, good resistance to corrosion and moisture, and eco-friendliness. They are ideal for various applications, making significant contributions to the industry. WPCs samples were manufactured using different weights and particle sizes for three types of wood: poplar, cypress, and Platanaceae. High-density polyethylene (HDPE) and maleic anhydride (MAPE) were added in specific proportions to produce WPCs using the Taguchi design of experiments. Injection-molded samples were obtained through the injection molding process. Additionally, pure samples of HDPE were prepared for comparison with the polymer composites. The main effects of the signal-to-noise ratio analysis and the optimal values for each mechanical property (tensile strength, elongation at break, flexural strength, and impact strength) were determined. ANOVA results showed that the wood type significantly affected tensile strength, while the weight ratio and particle size had no statistical significance. The types of wood had a noticeable and statistically significant effect on flexural strength, with a contribution of 71.28%, followed by the weight ratio, with a contribution of 11.66%, and the particle size, with a contribution of 2.58%. Additionally, the weight ratio significantly influenced the elongation at break and impact resistance tests. Predictive optimized mechanical characteristic values were calculated, showing that the predictive values were in acceptable agreement with the experimental values with errors smaller than 5%. Optimized tensile strength of 39.94 MPa, elongation at break of 18.41%, flexural strength of 51.71 MPa, and impact strength of 19.27 kJ/m² were achieved.

木塑复合材料（wpc）以其长寿命、轻量化设计、良好的耐腐蚀和防潮性以及生态友好性而闻名。它们是各种应用的理想选择，为行业做出了重大贡献。WPCs样品使用不同的重量和颗粒大小为三种类型的木材：杨木，柏木和铂科。采用田口实验设计，按一定比例加入高密度聚乙烯（HDPE）和马来酸酐（MAPE）制备wpc。通过注射成型工艺获得注射成型样品。此外，制备了纯HDPE样品，并与聚合物复合材料进行了比较。确定了信噪比分析的主要影响因素和各力学性能（抗拉强度、断裂伸长率、弯曲强度和冲击强度）的最佳值。方差分析结果显示，木材类型对抗拉强度有显著影响，而重量比和粒径对抗拉强度的影响无统计学意义。木材的种类对抗弯强度的影响显著且具有统计学意义，其贡献为71.28%，其次是重量比，贡献为11.66%，其次是粒度，贡献为2.58%。此外，重量比对断裂伸长率和抗冲击性能有显著影响。计算了预测优化力学特性值，结果表明，预测值与实验值吻合较好，误差小于5%。优化后的抗拉强度为39.94 MPa，断裂伸长率为18.41%，抗弯强度为51.71 MPa，冲击强度为19.27 kJ/m2。

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引用次数: 0

Transplacental and lactational transfer of polystyrene nanoplastics leads to long-term ovarian impairment in rat offspring 经胎盘和哺乳期聚苯乙烯纳米塑料的转移导致大鼠后代长期卵巢损伤

IF 7.7 Q2 ENGINEERING, ENVIRONMENTAL

Journal of hazardous materials advances

Pub Date : 2026-01-07 DOI: 10.1016/j.hazadv.2026.101007

Mohammad Bostanifard , Hamid Reza Moradi , Zabihollah Khaksar , Sajjad Abbasi , Behzad Shirkavand Hadavand , Milad Faraji

Polystyrene nanoplastics (PS-NPs) are emerging environmental contaminants that can cross biological barriers and accumulate in the reproductive organs. This study evaluated developmental ovarian toxicity after maternal and lactational PS-NP exposure in rats on gestational day 20 (GD20) and postnatal days 30 and 60 (PD30, PD60). Pregnant Sprague–Dawley rats were administered PS-NPs at doses of 0.1, 1, or 10 mg/kg/day during gestation and lactation. At GD20, fetal ovaries from exposed dams showed a significant reduction in primordial follicle number and diameter, early granulosa cell disorganization, and a lower parenchyma-to-stroma ratio, indicating impaired folliculogenesis. By PD30 and PD60, ovarian alterations intensified in a dose-dependent manner, including granulosa layer thinning, follicular degeneration, and cortical disarray, which were most pronounced in the high-dose group. Fluorescence microscopy confirmed the transplacental and lactational transfer of rhodamine-labeled PS-NPs, with persistent and dose-dependent accumulation in the follicles and stroma. Biochemically, PS-NP exposure increased the total oxidant status (TOS) and oxidative stress index (OSI) while decreasing the total antioxidant capacity (TAC). Serum estradiol and progesterone levels declined markedly, consistent with oxidative and endocrine disruption. Immunohistochemistry revealed the upregulation of P53 and downregulation of BCL-2, indicating apoptosis-mediated ovarian injury. These findings demonstrate that combined gestational and lactational PS-NP exposure causes persistent, dose-dependent ovarian damage from the fetal stage through postnatal development, highlighting the reproductive risks associated with maternal nanoplastic exposure in an increasingly polluted environment.

聚苯乙烯纳米塑料（PS-NPs）是一种新兴的环境污染物，可以跨越生物屏障，在生殖器官中积累。本研究评估了妊娠第20天（GD20）和出生后第30和60天（PD30, PD60）母期和哺乳期PS-NP暴露对大鼠卵巢的发育毒性。妊娠期和哺乳期给药剂量分别为0.1、1、10 mg/kg/d的PS-NPs。在GD20时，暴露母坝的胎儿卵巢显示出原始卵泡数量和直径明显减少，早期颗粒细胞组织紊乱，实质与间质比降低，表明卵泡发生受损。在PD30和PD60时，卵巢改变以剂量依赖的方式增强，包括颗粒层变薄、卵泡变性和皮质紊乱，这些在高剂量组最为明显。荧光显微镜证实罗丹明标记的PS-NPs经胎盘和哺乳期转移，并在卵泡和基质中持续和剂量依赖性积累。生物化学方面，PS-NP暴露增加了总氧化状态（TOS）和氧化应激指数（OSI），降低了总抗氧化能力（TAC）。血清雌二醇和黄体酮水平明显下降，与氧化和内分泌紊乱一致。免疫组化显示P53上调，BCL-2下调，提示凋亡介导的卵巢损伤。这些研究结果表明，妊娠期和哺乳期PS-NP联合暴露会导致从胎儿期到出生后发育期间持续的、剂量依赖性的卵巢损伤，突出了在日益污染的环境中母体纳米塑料暴露相关的生殖风险。

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引用次数: 0

Soil bacterial co-occurrence patterns and community assembly along a gradient of heavy metal and explosive pollution at ammunition demolition sites 弹药爆破场地重金属与炸药污染梯度土壤细菌共生格局及群落聚集

IF 7.7 Q2 ENGINEERING, ENVIRONMENTAL

Journal of hazardous materials advances

Pub Date : 2026-01-06 DOI: 10.1016/j.hazadv.2025.100975

Huijun Zhang , Yongbing Zhu , Sanping Zhao , Chao Ji , Shiyu Wang , Xiaodong Liu

Soil microbial communities play an essential role in ecological processes. Pollution from anthropogenic activities can disrupt interactions and assembly processes within soil bacterial communities. However, these processes have not been extensively studied at military-contaminated sites. This study explored bacterial community compositions and functions, the co-occurrence networks, and the assembly processes by analyzing soil samples collected along a heavy metal and explosive pollution gradient. The results showed that with the increase of pollution, the bacterial α-diversity indices decreased significantly, while the abundance of metal- and explosive-tolerant bacterial taxa increased, such as Bacteroidetes and Firmicutes. Lead, cadmium, total organic carbon, and 2,4,6-trinitrotoluene were key factors affecting the diversity and composition of bacteria. High combined pollution reduced the complexity and robustness of the bacterial network, resulting in a decrease in community stability. The deterministic process dominated the community assembly and became more pronounced as pollution increased. Chromium, lead, cadmium, copper, 2,4,6-trinitrotoluene, and soil texture were considered important driving factors for the determinism. Functional prediction showed that the anaerobic metabolism processes (fermentation and nitrogen respiration) were abundant under high pollution levels, and metabolic pathways associated with drug resistance were more prominent, which suggested alterations in biogeochemical cycles and potential ecological risks. This study confirms that the combined pollution from ammunition demolition reshapes bacterial communities by strengthening environmental filtration and altering bacterial interactions, providing a theoretical basis for the ecological restoration of military-impacted soils in the future.

土壤微生物群落在生态过程中起着重要作用。来自人为活动的污染可以破坏土壤细菌群落内部的相互作用和组装过程。然而，这些过程尚未在军事污染场址进行广泛研究。本研究通过分析重金属和爆炸污染梯度采集的土壤样品，探讨了细菌群落的组成和功能、共生网络和组装过程。结果表明：随着污染程度的增加，细菌α-多样性指数显著下降，耐金属和耐爆炸细菌类群如拟杆菌门和厚壁菌门的丰度增加；铅、镉、总有机碳和2,4,6-三硝基甲苯是影响细菌多样性和组成的关键因素。高复合污染降低了细菌网络的复杂性和鲁棒性，导致群落稳定性下降。确定性过程主导了群落聚集，并随着污染的增加而变得更加明显。铬、铅、镉、铜、2,4,6-三硝基甲苯和土壤质地被认为是决定性的重要驱动因素。功能预测表明，高污染条件下厌氧代谢过程（发酵和氮呼吸）丰富，与耐药相关的代谢途径更为突出，提示生物地球化学循环的改变和潜在的生态风险。本研究证实了弹药爆破联合污染通过加强环境过滤和改变细菌相互作用来重塑细菌群落，为未来军事影响土壤的生态修复提供了理论依据。

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引用次数: 0

High organic carbon drives community shifts and biodiversity loss in benthic macroinvertebrates of Baiyangdian Lake, China 高有机碳驱动白洋淀底栖大型无脊椎动物群落迁移和生物多样性丧失

IF 7.7 Q2 ENGINEERING, ENVIRONMENTAL

Journal of hazardous materials advances

Pub Date : 2026-01-06 DOI: 10.1016/j.hazadv.2025.100974

Fujie Zhai , Chao Zhang , Baoqing Shan

Dissolved organic carbon (DOC) plays a pivotal role in driving biogeochemical and ecological processes in aquatic ecosystems, yet its role in structuring benthic communities in shallow eutrophic lakes remains poorly understood. This study investigated the effects of DOC and its fluorescent components on the benthic macroinvertebrate community in Baiyangdian Lake, a representative floodplain lake in northern China. DOC concentrations varied markedly across the lake, peaking at 91.87 mg L⁻¹ in the northern region, suggestive of active internal carbon cycling. Parallel Factor Analysis identified three fluorescent dissolved organic matter (DOM) components: humic-like C1 (24.35% of total fluorescence) and protein-like C2 and C3 (75.6%). Benthic assemblages were dominated by pollution- and semi-tolerant taxa, including Chironomidae and Tubificidae, whereas sensitive taxa were scarce. Canonical correspondence and Mantel tests identified total phosphorus, total nitrogen, organic matter, and protein-like component C2 were the primary drivers of community structure. The significant correlation between C2 and species richness (r = −0.462, p < 0.001) suggests that refractory humic DOM may contribute to biodiversity loss. These findings provide insights for ecological restoration efforts and carbon management strategies in shallow eutrophic lakes.

溶解有机碳（DOC）在驱动水生生态系统的生物地球化学和生态过程中起着关键作用，但其在浅层富营养化湖泊底栖生物群落结构中的作用尚不清楚。本文研究了中国北方代表性河漫滩湖泊白洋淀中DOC及其荧光组分对底栖大型无脊椎动物群落的影响。湖水中DOC浓度变化明显，北部地区达到91.87 mg L - 1的峰值，说明湖水内部碳循环活跃。平行因子分析鉴定出三种荧光溶解有机物（DOM）成分：腐殖质样C1（占总荧光的24.35%）和蛋白样C2和C3（占总荧光的75.6%）。底栖动物群落以污染耐受和半耐受为主，包括Chironomidae和Tubificidae，而敏感类群较少。典型对应检验和Mantel检验表明，总磷、总氮、有机质和蛋白质样组分C2是群落结构的主要驱动因子。C2与物种丰富度呈显著相关（r = - 0.462, p < 0.001），表明难降解腐殖质DOM可能导致生物多样性丧失。这些发现为浅层富营养化湖泊的生态恢复工作和碳管理策略提供了见解。

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