Journal of Environmental Sciences-china最新文献_第7页

Efficient alleviation of ultrafiltration membrane fouling in treatment of dye effluent by a novel cationic dendritic starch-based flocculant 新型阳离子枝晶淀粉基絮凝剂对染料废水处理中超滤膜污染的有效缓解

IF 6.3 2区环境科学与生态学 Q1 ENVIRONMENTAL SCIENCES

Journal of Environmental Sciences-china

Pub Date : 2026-05-01 Epub Date: 2025-06-17 DOI: 10.1016/j.jes.2025.06.030

Yuyang Wang, Wenxiao Ren, Hu Yang

Dye effluent has become a challenging problem in wastewater treatment. Ultrafiltration (UF) is a popular method to purify dye effluent, but membrane fouling is a major problem seriously restricting its wide applications. A novel cationic dendritic starch-based flocculant (CL-CS-G) was designed and fabricated. The performance and mechanism of CL-CS-G in alleviation of membrane fouling during the successive flocculation-UF treatment of Acid Green 25 effluent, a typical industrial dye, were evaluated. Compared with polyaluminum chloride (PAC), CL-CS-G showed a lower loss of water flux but a less required dosage, besides, this dendritic flocculant could effectively reduce both reversible and irreversible fouling, and its irreversible fouling resistance was even reduced by 91.2 %, because of its distinct structural feature. The hyperbranched structure of CL-CS-G, with relatively loose and net-like configuration but also abundant reactive end-groups contained, caused higher bridging and sweeping flocculation effects in addition to charge neutralization; moreover, produced larger but looser dye flocs, than PAC and its linear analogue, resulting in a looser and porous cake layer, more easily cleaned up, and thus a higher efficiency in alleviation of membrane fouling. The high performance of CL-CS-G in flocculation and alleviation of membrane fouling was confirmed by its high economical efficiency, good reusability of the treated membrane, and effective purification of two other dye effluents and a simulated real dye mixture. CL-CS-G is an efficient, low cost and environmental-friendly flocculant, and thus has high application potentials in pretreatment of dye effluents and alleviation of membrane fouling.

染料废水已成为废水处理中的一个难题。超滤是一种常用的染料废水净化方法，但膜污染问题严重制约了超滤技术的广泛应用。设计并制备了一种新型阳离子枝状淀粉基絮凝剂CL-CS-G。评价了CL-CS-G对典型工业染料酸性绿25出水连续絮凝-超滤处理过程中膜污染的缓解效果及机理。与聚氯化铝（PAC）相比，枝状絮凝剂CL-CS-G的水通量损失更小，所需投加量更少，而且由于其独特的结构特点，该枝状絮凝剂可以有效地减少可逆和不可逆污垢，其不可逆污垢阻力甚至降低了91.2%。CL-CS-G的超支化结构具有相对松散的网状结构，但含有丰富的活性端基，除了电荷中和作用外，还具有较高的桥接和广泛的絮凝作用；与PAC及其线性类似物相比，产生的染料絮凝体更大但更疏松，使饼层更疏松多孔，更容易清理，从而减轻膜污染的效率更高。CL-CS-G具有较高的经济性，处理后的膜具有良好的可重复利用性，并对另外两种染料废水和模拟真实染料混合物进行了有效的净化，从而证实了CL-CS-G在絮凝和减轻膜污染方面的高性能。CL-CS-G是一种高效、低成本、环保的絮凝剂，在染料废水预处理和膜污染缓解方面具有很大的应用潜力。

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引用次数: 0

Re-evaluating the role of iron and manganese oxides in thallium retention: Insights from laboratory adsorption and soil pot experiments 重新评估铁和锰氧化物在铊保留中的作用：来自实验室吸附和土壤盆栽实验的见解

IF 6.3 2区环境科学与生态学 Q1 ENVIRONMENTAL SCIENCES

Journal of Environmental Sciences-china

Pub Date : 2026-05-01 Epub Date: 2025-05-28 DOI: 10.1016/j.jes.2025.05.065

Xian’an Yu , Yifan Guan , Jing Wei , Pengjie Hu , Jiawen Zhou , Tong Zhou , Zhu Li , Tangfu Xiao , Juan Liu , Yongming Luo , Peter Christie , Longhua Wu

Iron (Fe) and manganese (Mn) oxides play a crucial role in thallium (Tl) retention. However, the specific roles they play in this process remain unclear. Here, Fe oxides (goethite/hematite), Mn oxides (birnessite/MnO₂), and Fe-Mn binary oxides (Goe-MnO_x/Hem-MnO_x) were synthesized and used in single and mixed adsorption systems. Goethite and birnessite were then selected as amendments for the Lactuca sativa pot experiment. Results showed that Mn oxides exhibited higher adsorption capacity for Tl(I) than Fe-Mn binary oxides or Fe oxides. Adsorption energies calculated by density-functional-theory (DFT) further confirm the stronger affinity of birnessite for Tl(I). In mixed systems, as the mass ratio of birnessite-to-goethite/hematite increased from 1:0 to 1:200, Tl(I) adsorption capacities of the mixture decreased significantly by 65.5 % and 76.9 %. X-ray photoelectron spectroscopy analysis confirmed the oxidative uptake of Tl(I) by birnessite. Additionally, the distribution of Fe associated with the Mn phase collected by transmission electron microscopy–energy dispersive X-ray spectroscopy (TEM-EDS) indicated its inhibitory effect during the Tl(I) retention process by Mn(IV) oxides. Furthermore, in the pot experiment, goethite showed no discernible effect on lettuce growth or Tl uptake. In contrast, birnessite significantly lowered shoot Tl concentrations (84.7 %–94.4 %) and this was associated with the changes in the speciation of soil Mn and Tl as revealed by principal-component-analysis (PCA) and correlation analysis. This study clarifies the role of Fe/Mn oxides in the environmental behavior of Tl, offering valuable implications for the development of effective remediation strategies and ensuring safe crop production in Tl-contaminated soils.

铁（Fe）和锰（Mn）氧化物在铊（Tl）的保留中起着至关重要的作用。然而，它们在这一过程中扮演的具体角色尚不清楚。本文合成了Fe氧化物（针铁矿/赤铁矿）、Mn氧化物（birnessite/MnO2）和Fe-Mn二元氧化物（go - mnox /Hem-MnOx），并将其用于单一和混合吸附体系中。然后选择针铁矿和白石铁矿作为改良剂进行油菜盆栽试验。结果表明，Mn氧化物对Tl(I)的吸附能力高于Fe-Mn二元氧化物和Fe氧化物。密度泛函理论（DFT）计算的吸附能进一步证实了硼镁矿对Tl(I)具有较强的亲和力。在混合体系中，当璧石与针铁矿/赤铁矿的质量比从1:0增加到1:200时，混合物的Tl(I)吸附量显著下降65.5%和76.9%。x射线光电子能谱分析证实了铍锡矿对Tl(I)的氧化吸收。透射电镜-能谱仪（TEM-EDS）分析了Fe与Mn相的结合分布，表明Fe对Mn（IV）氧化物的Tl(I)保留有抑制作用。此外，在盆栽试验中，针铁矿对生菜生长和Tl吸收没有明显的影响。主成分分析（PCA）和相关分析显示，白钨矿显著降低了地上部Tl浓度（84.7% ~ 94.4%），这与土壤Mn和Tl形态的变化有关。本研究阐明了Fe/Mn氧化物在Tl环境行为中的作用，为制定有效的修复策略和确保Tl污染土壤的安全作物生产提供了有价值的意义。

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引用次数: 0

Comprehensive evaluation of bismuth tungstate-deposited stainless steel in chlorine-based electrochemical degradation through by-product analysis 通过副产物分析综合评价钨酸铋不锈钢在氯基电化学降解中的作用

IF 6.3 2区环境科学与生态学 Q1 ENVIRONMENTAL SCIENCES

Journal of Environmental Sciences-china

Pub Date : 2026-05-01 Epub Date: 2025-07-25 DOI: 10.1016/j.jes.2025.07.049

Çisil Gülümser-Göktaş, Sevil Veli

Electrooxidation is a promising method for degrading organic pollutants in wastewater, yet the formation of harmful by-products remains a major concern for environmental and process safety. This study investigates the degradation pathways of azo and oxazine dyes using bismuth tungstate-coated stainless steel (Bi₂WO₆/SS) electrodes. A central composite design was applied to optimize key process parameters, revealing that time was the most significant factor in both color and total organic carbon (TOC) removal. Under optimized conditions, complete color removal and 50 %-60 % TOC reduction were achieved. Gas chromatography-mass spectrometry analysis identified several by-products, including chlorinated organics and oxygenated compounds, indicating that active chlorine species played a dominant role in oxidation. While dye degradation was highly efficient, the formation of certain intermediates highlights the need for further toxicity assessment and process refinement to minimize secondary pollution risks. These findings emphasize the importance of by-product monitoring in electrooxidation studies and contribute to the development of safer and more effective electrochemical wastewater treatment strategies for industrial applications.

电氧化是一种很有前途的降解废水中有机污染物的方法，但有害副产物的形成仍然是环境和过程安全的主要问题。研究了钨酸铋涂层不锈钢（Bi2WO6/SS）电极对偶氮和恶嗪染料的降解途径。采用中心复合设计优化关键工艺参数，发现时间是影响颜色和总有机碳（TOC）去除率的最重要因素。在优化条件下，脱色效果良好，TOC降低50% ~ 60%。气相色谱-质谱分析鉴定了几种副产物，包括氯化有机物和含氧化合物，表明活性氯在氧化中起主导作用。虽然染料降解效率很高，但某些中间体的形成强调需要进一步进行毒性评估和工艺改进，以尽量减少二次污染风险。这些发现强调了副产物监测在电化学氧化研究中的重要性，并有助于开发更安全、更有效的工业应用电化学废水处理策略。

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引用次数: 0

Risk assessment and exposure patterns of hydroxypolycyclic aromatic hydrocarbons in elderly population: Insights from urinary metabolite levels and dietary habits 老年人群中羟基多环芳烃的风险评估和暴露模式：来自尿代谢水平和饮食习惯的见解

IF 6.3 2区环境科学与生态学 Q1 ENVIRONMENTAL SCIENCES

Journal of Environmental Sciences-china

Pub Date : 2026-05-01 Epub Date: 2025-10-14 DOI: 10.1016/j.jes.2025.10.018

Yafei Gao , Biwen Wang , Liting Hua , Juanhua Li , Junqi Liu , Yang Peng , Lu Cheng , Hongkai Zhu , Hongwen Sun , Han Li , Hongzhi Zhao

Polycyclic aromatic hydrocarbons (PAHs) are well-known for their adverse health effects and have garnered significant global attention. This study assessed the levels of ten monohydroxy metabolites of PAHs (OH-PAHs), derived from naphthalene, fluorene, phenanthrene, and pyrene, in urine samples collected from 495 elderly individuals in southern China. OH-PAH concentrations ranged from 0.134 to 183 ng/mL, with OH-Nap (the monohydroxy metabolite of naphthalene) being the most prevalent, accounting for 76.8 % of total metabolites. Significant correlations were observed between urinary OH-PAH levels and demographic factors including gender, smoking, and alcohol consumption, with smoking emerging as the strongest determinant. Regression analyses indicated that steaming significantly reduced PAH exposure (e.g., for 1-OHNap: β = -0.103, 95 % CI: -0.67, -0.04, p < 0.05), while dietary factors, such as fish, mycorrhizal algae, soy products, and coarse grains, influenced OH-PAH concentrations (p < 0.05). Monte Carlo simulations revealed a hazard index below the safety threshold of 1 and an overall carcinogenic risk ranging from 6.40 × 10⁻⁸ to 1.05 × 10⁻⁴, with approximately 85 % of individuals exceeding the acceptable carcinogenic risk threshold (lg(CR) > -6), primarily due to pyrene and naphthalene, which together accounted for 87.2 % of the total. This study delineates the link between PAH metabolites and dietary habits, uncovering health risks for the elderly population in the region. It provides a scientific basis for environmental health and pollution prevention policies aimed at mitigating the adverse effects of PAHs on environmental and public health.

多环芳烃（PAHs）因其对健康的不良影响而闻名，并引起了全球的广泛关注。本研究评估了中国南方495名老年人尿液样本中10种来自萘、芴、菲和芘的单羟基多环芳烃（OH-PAHs）的水平。OH-PAH浓度范围为0.134 ~ 183 ng/mL，其中OH-Nap（萘的单羟基代谢物）最为普遍，占总代谢物的76.8%。尿中OH-PAH水平与人口统计学因素（包括性别、吸烟和饮酒）之间存在显著相关性，其中吸烟是最重要的决定因素。回归分析表明，蒸煮显著减少了多环芳烃暴露（例如，1-OHNap: β = -0.103, 95% CI: -0.67, -0.04, p < 0.05），而饮食因素，如鱼类、菌根藻、豆制品和粗粮，影响了OH-PAH浓度（p < 0.05）。蒙特卡罗模拟显示，危险指数低于安全阈值1，总体致癌风险范围为6.40 × 10⁻⁸至1.05 × 10⁻⁴，大约85%的人超过了可接受的致癌风险阈值（lg(CR) > -6），主要是由于芘和萘，它们加起来占总数的87%。本研究描述了多环芳烃代谢物与饮食习惯之间的联系，揭示了该地区老年人的健康风险。它为旨在减轻多环芳烃对环境和公众健康的不利影响的环境卫生和污染预防政策提供了科学依据。

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引用次数: 0

Fate of dissolved organic matter in the wastewater treatment plant-constructed wetland system 污水处理厂-人工湿地系统中溶解有机物的命运

IF 6.3 2区环境科学与生态学 Q1 ENVIRONMENTAL SCIENCES

Journal of Environmental Sciences-china

Pub Date : 2026-05-01 Epub Date: 2025-06-16 DOI: 10.1016/j.jes.2025.06.014

Xin Li , Anning Li , Bentao Bao , Zejin Zhang , Shiyu Li , Xiaoyong Cui , Hans Christian Bruun Hansen , Qingjun Guo , Flemming Ekelund

Dissolved organic matter (DOM) plays an important role in the nutrient cycle and energy flow. However, as the key node linking anthropogenic DOM with natural ecosystems, limited attention has been paid to the fate of DOM in the municipal wastewater treatment process, especially in the combined wastewater treatment plant and constructed wetland system. In this study, the fluorescence excitation-emission matrix combined with parallel factor analysis (PARAFAC) was applied in the coupled water-processing system to elucidate the fate of DOM in the water treatment process. In terms of the relative abundance of PARAFAC components, amino acid or protein-like DOM and microbial humic-like DOM were predominantly altered in the wastewater treatment plant, whereas low-molecular-weight humic fraction and terrestrial humic-like DOM were predominantly altered in the constructed wetland. Moreover, the concentration of dissolved organic carbon was fluctuating in the system, decoupling from the removal of pollutants such as nitrogen and phosphorus. Correspondingly, the humification index, an indicator of DOM stability, mainly increased in the wastewater treatment plant, whereas the biological index and the fluorescence index exhibited greater variability in the constructed wetland. Based on the combination of the Mantel test, partial least squares path modeling, and random forest analysis, a suggestion is provided that the management of DOM stability can be coordinated with the management of nitrogen, phosphorus, and PARAFAC components like amino acid or protein-like DOM. Thus, this study provided a new picture to understand both the quality and quantity of DOM during water treatment.

溶解有机质（DOM）在养分循环和能量流动中起着重要作用。然而，作为连接人为DOM与自然生态系统的关键节点，DOM在城市污水处理过程中的命运，特别是在污水处理厂与人工湿地联合系统中的命运，却没有得到足够的关注。本研究将荧光激发-发射矩阵结合平行因子分析（PARAFAC）技术应用于耦合水处理系统中，以阐明DOM在水处理过程中的命运。在PARAFAC组分的相对丰度方面，污水处理厂主要改变了氨基酸或蛋白质样DOM和微生物腐殖质样DOM，而人工湿地主要改变了低分子量腐殖质组分和陆生腐殖质样DOM。此外，系统中溶解有机碳的浓度是波动的，与氮、磷等污染物的去除脱钩。与之相对应的是，DOM稳定性指标腐殖质化指数主要在污水处理厂中增加，而生物指数和荧光指数在人工湿地中表现出较大的变异性。结合Mantel检验、偏最小二乘路径建模和随机森林分析，提出对DOM稳定性的管理可以与氮、磷、氨基酸或类蛋白质DOM等PARAFAC组分的管理相协调。因此，本研究为了解水处理过程中DOM的质量和数量提供了新的视角。

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引用次数: 0

Co-exposure to polystyrene microplastics and perfluorooctanoic acid can exacerbate lipid metabolism disorders and liver damage in adult zebrafish 同时暴露于聚苯乙烯微塑料和全氟辛酸会加剧成年斑马鱼的脂质代谢紊乱和肝损伤

IF 6.3 2区环境科学与生态学 Q1 ENVIRONMENTAL SCIENCES

Journal of Environmental Sciences-china

Pub Date : 2026-05-01 Epub Date: 2025-10-10 DOI: 10.1016/j.jes.2025.10.001

Sijie Tian , Ruixiang Li , Ya Zeng , Lingfeng Qin , Caicheng Long , Taiping Qing , Peng Zhang , Bo Feng

Microplastics (MPs) and perfluorooctanoic acid (PFOA) are common emerging environmental contaminants in aquatic environments, and their ecological risks have become a research focus. Although they coexist widely in aquatic environments, the combined toxicity of polystyrene microplastics (PS-MPs) and PFOA to aquatic organisms remains unclear. This study investigated the individual and combined toxicity of PS-MPs and PFOA to zebrafish after 28 days of exposure. The results showed that ingestion of PS-MPs and PFOA induced intestinal and liver tissue damage, alterations in oxidative stress, and lipid index in zebrafish. The breakdown of the intestinal barrier will further lead to the increase of lipopolysaccharide in the blood. Notably, combined exposure to PS-MPs and PFOA exerted greater adverse effects than exposure to each contaminant individually. Additionally, exposure to PS-MPs and PFOA significantly disrupted the homeostasis of the intestinal microbiota, and the relative abundances of Proteobacteria and Actinobacteria significantly increased. Transcriptomic analysis further revealed that exposure to PS-MPs and PFOA would lead to the upregulation of genes related to lipid metabolism in zebrafish and alterations in pathways such as glycerolipid metabolism, fat digestion and absorption, and peroxisome proliferator-activated receptor signaling. In conclusion, this study demonstrates that combined exposure to PS-MPs and PFOA exacerbates liver and intestinal damage in zebrafish, disrupts lipid homeostasis, and may contribute to the development of nonalcoholic fatty liver disease. This study has enhanced our understanding of the environmental health risks from the coexistence of MPs and PFOA, and has reference value for formulating complex pollution control standards.

微塑料（MPs）和全氟辛酸（PFOA）是水生环境中常见的新兴环境污染物，其生态风险已成为研究热点。聚苯乙烯微塑料（PS-MPs）和全氟辛酸（PFOA）虽然在水生环境中广泛共存，但它们对水生生物的联合毒性尚不清楚。本研究研究了暴露于斑马鱼28天后，PS-MPs和PFOA对斑马鱼的单独和联合毒性。结果表明，摄入PS-MPs和PFOA可引起斑马鱼肠道和肝脏组织损伤、氧化应激和脂质指数的改变。肠道屏障的破坏将进一步导致血液中脂多糖的增加。值得注意的是，PS-MPs和PFOA的联合暴露比单独暴露于每种污染物产生更大的不利影响。此外，暴露于PS-MPs和PFOA显著破坏了肠道微生物群的稳态，变形菌门和放线菌门的相对丰度显著增加。转录组学分析进一步表明，暴露于PS-MPs和PFOA会导致斑马鱼脂质代谢相关基因的上调，以及甘油脂代谢、脂肪消化和吸收、过氧化物酶体增殖物激活受体信号通路的改变。总之，本研究表明，PS-MPs和PFOA联合暴露会加剧斑马鱼的肝脏和肠道损伤，破坏脂质稳态，并可能导致非酒精性脂肪性肝病的发展。本研究加深了我们对多磺酸和全氟辛酸共存的环境健康风险的认识，对制定复杂污染控制标准具有参考价值。

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引用次数: 0

Antagonistic effects of selenium on methylmercury-induced toxicity through mitochondrial quality control and enhanced GSH synthesis in Caenorhabditis elegans 硒通过线粒体质量控制和增强GSH合成对秀丽隐杆线虫甲基汞诱导毒性的拮抗作用

IF 6.3 2区环境科学与生态学 Q1 ENVIRONMENTAL SCIENCES

Journal of Environmental Sciences-china

Pub Date : 2026-05-01 Epub Date: 2025-07-18 DOI: 10.1016/j.jes.2025.07.036

Yanan Zhao , Yuting Ding , Ruoyun Dong , Yuanyuan Wu , Chenxi Zhou , Yaguang Nie , Guoping Zhao , An Xu , Yun Liu

Selenium (Se), an essential trace element, plays a critical role in protecting the toxicity of methylmercury (MeHg). However, its detoxification mechanism for alleviating MeHg-induced damage remains largely unexplored. This study focused on the antagonistic effects of Se supplementation on the toxic responses induced by MeHg pretreatment in Caenorhabditis elegans. Our results showed that following a 20 h pre-exposure to MeHg, 4 h exposure to Se effectively and rapidly antagonized the reproductive and neurological impairments induced by MeHg. Meanwhile, we found that the total Hg content decreased from 166 ± 46.0 to 109 ± 18.7 μg/g after the addition of Se. Apart from inhibiting the bioaccumulation of Hg, Se supplementation reduced MeHg-induced reactive oxygen species (ROS) and promoted mitochondrial fusion to improve mitochondrial quality. In addition, MeHg-induced autophagy could be alleviated by increasing lysosome activity after the addition of Se. Further studies revealed that Se supplementation modulated the expression of gss-1 and gst-4, regulating glutathione (GSH) synthesis and elevated MeHg-decreased GSH content from 45.5 % to 79.7 %. These findings suggested that Se recovered MeHg-induced reproductive and neurological damage by modulating mitochondrial function and GSH synthesis, providing valuable insights for developing novel therapeutic strategies against MeHg toxicity.

硒（Se）是人体必需的微量元素，在保护甲基汞（MeHg）的毒性中起着至关重要的作用。然而，其解毒机制减轻甲基汞诱导的损伤仍未得到充分研究。本研究主要研究硒对MeHg预处理诱导的秀丽隐杆线虫毒性反应的拮抗作用。结果表明，在MeHg预暴露20 h后，硒暴露4 h可以有效、快速地拮抗MeHg诱导的生殖和神经损伤。同时发现，添加硒后，总汞含量由166±46.0 μg/g下降到109±18.7 μg/g。硒的补充除了抑制汞的生物积累外，还可以减少汞诱导的活性氧（ROS），促进线粒体融合，从而提高线粒体质量。此外，添加硒后可通过提高溶酶体活性来减轻mehg诱导的自噬。进一步的研究表明，硒补充可以调节gss-1和gst-4的表达，调节谷胱甘肽（GSH）的合成，并使GSH含量从45.5%降低到79.7%。这些发现表明，硒通过调节线粒体功能和谷胱甘肽合成来恢复甲基汞诱导的生殖和神经损伤，为开发新的甲基汞毒性治疗策略提供了有价值的见解。

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引用次数: 0

Photosynthetic MICP: A sustainable pathway for soil remediation in coal tailings 光合MICP：煤尾矿土壤修复的可持续途径

IF 6.3 2区环境科学与生态学 Q1 ENVIRONMENTAL SCIENCES

Journal of Environmental Sciences-china

Pub Date : 2026-05-01 Epub Date: 2025-08-25 DOI: 10.1016/j.jes.2025.08.041

Zijing Lu , Hengshuang Wang , Zhixiang Wang , Jiazhi Liu , Shaoxian Song , Yinta Li , María Luciana Montes , Ling Xia

Coal tailings, a byproduct of mining activities, pose severe threats to ecosystem health due to structural degradation and poor water retention. Herein, this study proposed a photosynthetic microbially induced carbonate precipitation strategy driven by the synergistic interaction of Chlorella sorokiniana FK and Bacillus sp. QX4 to rehabilitate coal tailings soil. Photosynthetic biomineralization effectively aggregates dispersed coal tailing particles, enhancing the content of water-stable macroaggregates by 128 % following five cycles of dry-wet alternation. This process also results in a 14 % increase in average weight diameter, doubles the calcium-bound organic carbon content, reduces water evaporation by 47.9 %, and decreases surface crack proportion by 64 %. Ca²⁺ and extracellular polymeric substances are key regulators of CaCO₃ nucleation and particle binding with the cation-π bonds they form being the primary mechanism for increasing the stability of the coal tailing macroaggregate composite structure. This urea-free method significantly enhances aggregate stability and water retention capacity, offering a sustainable strategy for the functional soil transformation of coal tailings. This holds significant implications for the ecological restoration of mining-affected areas.

煤尾矿是采矿活动的副产品，由于结构退化和保水能力差，对生态系统健康构成严重威胁。为此，本研究提出了一种由sorokiniana小球藻FK和芽孢杆菌sp. QX4协同作用驱动的光合微生物诱导碳酸盐沉淀策略来修复煤矸石土壤。在干湿交替的5个循环中，光合生物矿化有效地聚集了分散的煤尾颗粒，使水稳性大团聚体的含量增加了128%。该工艺还导致平均重量直径增加14%，钙结合有机碳含量增加一倍，水蒸发减少47.9%，表面裂纹比例减少64%。Ca2+和胞外聚合物是CaCO3成核和粒子结合的关键调控因子，它们形成的阳离子-π键是提高煤矸石大骨料复合结构稳定性的主要机制。该方法显著提高了尾矿集料稳定性和保水性，为尾矿功能性土壤转化提供了可持续的策略。这对受采矿影响地区的生态恢复具有重要意义。

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引用次数: 0

Cd toxicity thresholds in response to freeze-thaw and wetting-redrying cycles in various parental paddy soils 不同亲本水稻土冻融和干湿循环对Cd毒性阈值的响应

IF 6.3 2区环境科学与生态学 Q1 ENVIRONMENTAL SCIENCES

Journal of Environmental Sciences-china

Pub Date : 2026-05-01 Epub Date: 2025-08-05 DOI: 10.1016/j.jes.2025.07.059

Jing Wang, Meng Wang, Lei Yu, Xiaoyi Sun, Luyao Qin, Jiaxiao Liu, Ruyan Zhou, Yun Han, Shibao Chen

In order to clarify the stabilization characteristics of cadmium (Cd) after different aging methods, soil culture tests of freeze-thaw, wetting-redrying cycles, and natural aging affecting on Cd phytotoxicity to rice were conducted. According to the national food safety standard GB2762–2022, the toxicity thresholds (RT) of Cd under different aging modes were derived. The results showed that: as the aging time increased to 360 days, the RT of different parent soils increased by 28.49 %-204.86 % (freeze-thaw), 37.80 %-192.55 % (natural), 34.45 %-205.87 % (wetting-redrying), compared with 14d’ aging. Compared with natural aging: The RT of granite soil (S_G), river sandy mud (S_R), stucco field (S_S) increased by 99.46 % under freeze-thaw aging, decreased by 66.68 % under wetting-redrying aging; The RT of purple sandy shale (S_P), quaternary red clay soil (S_Q) decreased by 20.32 % under freeze-thaw aging, increased by 70.99 % under wetting-redrying aging. RT of yellow mud soil (S_Y) showed a decreasing trend under unnatural aging. The prediction models of RT based on different parental characteristics under different aging methods were established: log₁₀(AF₃₆₀)=1.038AG-0.251Chaol-1.052, log₁₀(AF₃₆₀)=0.481pH+1.492CEC+1.223MW-6.375, log₁₀(AF₃₆₀)=0.119pH+0.264CEC+1.091AD+0.263. The regression coefficients of aging factors (AF₃₆₀), which were 1.04, 1.49, and 1.09 respectively, provided that water-stable aggregates (AG), cation exchange capacity (CEC), and the adhesive film (AD) were the primary controlling factors influencing RT with positive correlations. This study provided an important basis for evaluating different long-term aging modes affecting on soil Cd toxicity behavior and RT of Cd on rice.

为了阐明不同老化方式对镉（Cd）的稳定特性，进行了冻融、湿复干循环和自然老化对水稻镉植物毒性的影响试验。根据国家食品安全标准GB2762-2022，推导出不同老化模式下Cd的毒性阈值（RT）。结果表明：随着老化时间的延长至360 d，不同母质土壤的RT分别比14d增加28.49% ~ 204.86%（冻融）、37.80% ~ 192.55%（自然）、34.45% ~ 205.87%（干湿复干）；与自然老化相比，冻融老化下花岗岩土（SG）、河砂泥（SR）、灰泥田（SS）的RT提高了99.46%，湿复干老化下降低了66.68%；冻融老化作用下，紫砂页岩（SP）、第四纪红粘土（SQ）的RT降低了20.32%，湿复干老化作用下，RT增加了70.99%。黄泥土（SY）在非自然老化条件下，RT呈下降趋势。建立了不同老化方法下基于不同亲本性状的RT预测模型：log10(AF360)=1.038 ag -0.251 chal -1.052, log10(AF360)=0.481pH+1.492CEC+1.223MW-6.375, log10(AF360)=0.119pH+0.264CEC+1.091AD+0.263。老化因子（AF360）的回归系数分别为1.04、1.49和1.09，表明水稳性团聚体（AG）、阳离子交换容量（CEC）和粘附膜（AD）是影响RT的主要控制因子，且呈正相关。本研究为评价不同长期老化方式对土壤Cd毒性行为及Cd对水稻的影响提供了重要依据。

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引用次数: 0

Natural weathering and plant regeneration accelerate soil restoration of fine particle mine tailings 自然风化和植物再生加速了细粒尾矿的土壤修复

IF 6.3 2区环境科学与生态学 Q1 ENVIRONMENTAL SCIENCES

Journal of Environmental Sciences-china

Pub Date : 2026-05-01 Epub Date: 2025-08-19 DOI: 10.1016/j.jes.2025.08.032

Delong Meng , Yu Liu , Xiaohui Huang , Jing Wen , Teng Zhang , Huaqun Yin , Ling Xia , Wenyi Liu , Jing Xiong , Xing Li , Zhenghua Liu , Xiangdong Xiao , Ibrahim Ahmed Ibrahim , Xueduan Liu , Min Zhang

Tailings pedogenesis plays a fundamental role in the ecological restoration of mining wastelands by converting barren tailings into soil-like substrates through physical, chemical, and biological processes. To systematically investigate the contributions and interactions of natural weathering and plant regeneration in the tailings pedogenesis, this study analyzed the microstructure, chemical composition, and rhizosphere microbial communities of original tailings samples (OR), 15-year naturally weathered samples (PW), and naturally regenerated samples spontaneously colonized by Miscanthus (PM), Lolium perenne (LP), and Cynodon dactylon (CD). X-ray micro-computed tomography revealed that natural weathering increased the total soil porosity of the tailings by 13.45 %, with negligible effects on chemical properties. After natural regeneration, soil porosity further increased from 18.74 % to 41.45 %. Scanning Electron Microscope revealed microaggregates attaching to the root surfaces. In addition, plant species exhibited distinct influences on soil chemical properties. Specifically, PM significantly increased soil organic matter and nitrate nitrogen content, whereas CD primarily promoted the accumulation of rapidly available potassium. Compared to the OR, natural weathering initiated the reconstruction of microbial communities, which were further enriched by plant root systems during natural regeneration. Notably, PM enriched functional genera such as Haliangium and Bryobacter, which were positively associated with heavy metal stabilization, suggesting its role as a critical pioneer species for ecological restoration of tailings. This study highlights the distinct and synergistic roles of natural weathering and plant regeneration in tailings pedogenesis, offering insights for plant selection and ecological restoration strategies.

尾矿成土作用是通过物理、化学和生物等过程将尾矿转化为类土基质，在矿山废弃地生态恢复中起着基础性作用。为了系统探讨自然风化和植物再生在尾矿成土过程中的作用及其相互作用，本研究分析了原始尾矿样品（OR）、15年自然风化样品（PW）和自然再生样品（Miscanthus （PM）、Lolium perenne （LP）和Cynodon dactylon （CD）自然定殖）的微观结构、化学成分和根际微生物群落。x射线微计算机断层扫描结果显示，自然风化使尾矿的总孔隙度增加13.45%，对其化学性质的影响可以忽略不计。自然更新后，土壤孔隙度由18.74%进一步提高到41.45%。扫描电镜显示，微聚集体附着在根表面。此外，植物种类对土壤化学性质也有明显的影响。其中，PM显著提高了土壤有机质和硝态氮含量，CD则主要促进速效钾的积累。与OR相比，自然风化引发了微生物群落的重建，在自然再生过程中，植物根系进一步丰富了微生物群落。值得注意的是，PM富集了与重金属稳定正相关的功能属，如Haliangium和Bryobacter，表明它是尾矿生态恢复的关键先锋物种。该研究强调了自然风化和植物再生在尾矿成土过程中的独特和协同作用，为植物选择和生态恢复策略提供了见解。

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引用次数: 0