Soil & Environmental Health最新文献_第2页

Differential regulation of soil antibiotic resistance genes by biochar types and their derived dissolved organic matter 生物炭类型及其衍生溶解有机质对土壤抗生素抗性基因的差异调控

Soil & Environmental Health

Pub Date : 2025-10-01 DOI: 10.1016/j.seh.2025.100179

Yi Chen , Wei-Li Jia , Rui Ma , Yi-Hao Yu , Lu-Kai Qiao , Fang-Zhou Gao , Guang-Guo Ying

Agricultural soil represent a critical hotspot for the emergence and dissemination of antibiotic resistance genes (ARG), posing significant threats to food safety, public health, and agricultural sustainability. Biochar, a carbon-rich material derived from biomass pyrolysis, has emerged as a promising soil amendment capable of modulating the fate and transport of ARG in terrestrial ecosystems. Nevertheless, the underlying mechanisms by which biochar and its biochar-derived dissolved organic matter (BDOM) influence ARG dynamics remain poorly understood. It is hypothesized that biochar and BDOM regulate ARG dissemination through their effects on soil microbial community composition, functional potential, and metabolic activity. To test this hypothesis, we conducted a controlled microcosm experiment in which corn stover biochar (CBC), reed straw biochar (RBC), corn stover BDOM (CBDOM), and reed straw BDOM (RBDOM) were applied to agricultural soil amended with organic fertilizer. Our results revealed contrasting effects of the two biochars: CBC increased the relative abundance of ARGs by up to 2.48-fold compared to organic fertilizer control, whereas RBC consistently suppressed ARG levels by up to 91 %. In contrast, BDOM exhibited a comparatively weaker influence on ARG abundance than its solid-phase biochar counterpart. Partial least-squares path modeling identified mobile genetic elements as the primary drivers of ARG dissemination across all treatments. Notably, the CBC application was associated with a marked enrichment of IntI1, a clinical class 1 integron-integrase gene. Conversely, both RBC and BDOM suppressed polyunsaturated fatty acid metabolism and ATP synthesis, potentially reducing microbial antibiotic resistance. Furthermore, CBC promoted the potential ARG hosts involved in xenobiotic degradation, while RBC enhanced the potential hosts associated with the nitrogen cycle. Collectively, these findings elucidate the complex and feedstock-dependent roles of biochar in shaping ARG dynamics in agricultural soils, offering a strategic, cost-effective, and environmentally sustainable approach to mitigate ARG pollution in agroecosystems.

农业土壤是抗生素耐药基因（ARG）出现和传播的重要热点，对食品安全、公众健康和农业可持续性构成重大威胁。生物炭是一种来自生物质热解的富含碳的物质，已经成为一种有前途的土壤改良剂，能够调节陆地生态系统中ARG的命运和运输。然而，生物炭及其生物炭衍生的溶解有机质（BDOM）影响ARG动力学的潜在机制仍然知之甚少。假设生物炭和BDOM通过影响土壤微生物群落组成、功能潜能和代谢活性来调节ARG的传播。为了验证这一假设，我们在有机肥改良的农业土壤中进行了玉米秸秆生物炭（CBC）、芦苇秸秆生物炭（RBC）、玉米秸秆BDOM （CBDOM）和芦苇秸秆BDOM （RBDOM）的对照微观实验。我们的研究结果揭示了两种生物炭的对比效果：与有机肥对照相比，CBC使ARG的相对丰度增加了2.48倍，而RBC则持续抑制ARG水平高达91%。相比于固相生物炭，BDOM对ARG丰度的影响相对较弱。偏最小二乘路径模型确定了移动遗传因子是所有治疗中ARG传播的主要驱动因素。值得注意的是，CBC的应用与临床1类整合子整合酶基因IntI1的显著富集有关。相反，RBC和BDOM均抑制多不饱和脂肪酸代谢和ATP合成，可能降低微生物抗生素耐药性。此外，CBC促进了参与外源降解的潜在ARG宿主，而RBC增强了与氮循环相关的潜在宿主。总的来说，这些发现阐明了生物炭在塑造农业土壤中ARG动态方面的复杂和依赖原料的作用，为减轻农业生态系统中ARG污染提供了一种具有战略意义、成本效益和环境可持续性的方法。

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引用次数: 0

Reduction of porewater arsenic and accumulation in rice grains by novel composite membranes under flooded conditions 水淹条件下新型复合膜对水稻孔隙水中砷的还原和富集作用

Soil & Environmental Health

Pub Date : 2025-09-02 DOI: 10.1016/j.seh.2025.100177

Qiao-Rui Ren , Jing-Min Yang , Xin Wang , Delai Zhong , Xiong-Hui Ji , Bo Peng , Qin-Bo Qin

Reductive dissolution of As-bearing Fe-oxyhyr)oxides in paddy soils under flooded conditions can trigger mass As liberation into porewater as a primary hotspot of bioavailable As and thus favor As uptake by rice. To tackle this challenge, we fabricated a ferrihydrite-polyvinyl alcohol composite membrane to target and extract porewater As in paddy soils, aiming at decreasing As accumulation in rice grains. The treatment deploying the membranes at three depths reduced porewater As concentration by 34% and average diffusive gradients in thin-films (DGT)-measured As levels by 36% at the 0–20 cm soil depth relative to control. The As content in rice grains decreased by 34% accordingly. Furthermore, ammonium phosphate application not only enhanced the As extraction efficiency of the composite membranes from porewater, but also increased the oxidation percentage of AsIII on the membranes based on X-ray photoelectron spectroscopy analysis. Scanning electron microscopy coupled with energy-dispersive X-ray spectroscopy reveals Si enrichment on ferrihydrite surfaces within the membrane under flooded conditions. This surface-bound Si effectively inhibits ferrihydrite crystallization and retards its reductive dissolution, thereby sustaining high As removal efficiency throughout extended extraction cycles. This study provides a promising remediation strategy for in-situ removal of porewater As in paddy soils, significantly mitigating As accumulation in rice grains.

水淹条件下水稻土中含砷铁氧氧化物的还原溶解可引发大量砷释放到孔隙水中，成为生物可利用砷的主要热点，从而有利于水稻对砷的吸收。为了解决这一问题，我们制备了一种水合铁-聚乙烯醇复合膜，以瞄准和提取水稻土孔隙水中的砷，旨在减少水稻籽粒中砷的积累。与对照相比，在3个深度部署膜的处理使孔隙水中As浓度降低了34%，薄膜中平均扩散梯度（DGT）测量的As水平在0-20 cm土壤深度降低了36%。稻谷中砷含量相应降低34%。此外，应用磷酸铵不仅提高了复合膜从孔隙水中提取砷的效率，而且提高了膜上AsIII的氧化率（x射线光电子能谱分析）。扫描电镜和能量色散x射线能谱分析表明，在水淹条件下，膜内水合铁表面的Si富集。这种表面结合的Si有效地抑制了水合铁的结晶，并延缓了其还原性溶解，从而在延长的萃取周期中保持了高的As去除效率。该研究为原位去除水稻土孔隙水中砷提供了一种有前景的修复策略，可显著减轻水稻籽粒中砷的积累。

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引用次数: 0

Combined effects of fulvic acid and phosphate on FeII oxidation and Fe precipitation 黄腐酸和磷酸盐对FeII氧化和铁沉淀的联合影响

Soil & Environmental Health

Pub Date : 2025-08-30 DOI: 10.1016/j.seh.2025.100176

Qian Sun , Yida Li , Sen Li , Panbo Zhao , Jiali Guo , Xin Lin , Tingting Fan , Hu Cheng , Qing-Long Fu , Yujun Wang

The chemical transformation of ferrous Fe (FeII) under aerobic conditions is a key process governing Fe cycling in soil and is strongly influenced by coexisting constituents such as phosphate and organic matter. Transient redox fluctuations result in the simultaneous presence of FeII and O₂. However, the combined effects of phosphate and fulvic acid (FA) on FeII oxidation in the presence of O₂ and Fe precipitation remain poorly understood. In this study, we used kinetic experiments and solid-phase characterizations to unravel the underlying mechanisms. Our results demonstrate that FA impeded both FeII oxidation and Fe precipitation. This inhibition might be attributed to FeII complexation with FA and the subsequent adsorption of FA onto Fe mineral surfaces. When phosphate and FA coexisted, phosphate partially decreased the inhibitory FA effects, which is likely due to the formation of Fe hydroxyphosphate and competitive adsorption between phosphate and FA on Fe mineral surfaces. In the absence of phosphate, goethite was the predominant ferric (FeIII) product. However, phosphate addition favored the formation of lepidocrocite and Fe hydroxyphosphate. Increasing phosphate concentrations led to greater phosphate incorporation into Fe minerals. When both phosphate and FA were present, the crystallinity of lepidocrocite and Fe hydroxyphosphate decreased compared to the sole phosphate system. Overall, this study reveals that FA simultaneously inhibited FeII oxidation and Fe precipitation, and that phosphate mitigated these effects via Fe hydroxyphosphate formation and competitive interactions. These findings provide an insight into how coexisting organic and inorganic ligands regulate Fe redox kinetics and Fe precipitation, and underscore the importance of incorporating such interactions into future studies of Fe cycling under fluctuating redox conditions in soil.

铁在好氧条件下的化学转化是控制土壤铁循环的关键过程，并且受到磷酸盐和有机质等共存成分的强烈影响。瞬时氧化还原波动导致FeII和O2同时存在。然而，在O2和Fe沉淀存在的情况下，磷酸盐和富里酸（FA）对FeII氧化的联合影响尚不清楚。在这项研究中，我们使用动力学实验和固相表征来揭示潜在的机制。我们的研究结果表明，FA阻碍了FeII氧化和Fe沉淀。这种抑制作用可能归因于FeII与FA的络合以及随后FA在Fe矿物表面的吸附。当磷酸盐和FA共存时，磷酸盐部分降低了FA的抑制作用，这可能是由于铁羟基磷酸的形成以及磷酸盐和FA在铁矿物表面的竞争性吸附。在没有磷酸盐的情况下，针铁矿是主要的铁（FeIII）产物。然而，磷酸盐的加入有利于鳞片石和铁羟基磷酸的形成。磷酸盐浓度的增加导致更多的磷酸盐掺入到铁矿物中。当磷酸盐和FA同时存在时，蛭石和羟基磷酸铁的结晶度比单一磷酸盐体系降低。总的来说，本研究表明，FA同时抑制FeII氧化和Fe沉淀，而磷酸盐通过铁羟基磷酸盐的形成和竞争相互作用减轻了这些影响。这些发现提供了对共存的有机和无机配体如何调节铁氧化还原动力学和铁沉淀的见解，并强调了将这种相互作用纳入未来土壤中波动氧化还原条件下铁循环研究的重要性。

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引用次数: 0

Sequestration and degradation of per- and polyfluoroalkyl substances in soil: Opportunities and challenges 土壤中全氟烷基和多氟烷基物质的固存和降解：机遇和挑战

Soil & Environmental Health

Pub Date : 2025-08-29 DOI: 10.1016/j.seh.2025.100175

Zhenyu Cao , Fugen Dou , Youjun Deng , Xingmao Ma

Per- and polyfluoroalkyl substances (PFAS) are increasingly detected in soils, posing potential risks to human health via their accumulation in food crops. Unfortunately, options for effective remediation of PFAS-contaminated soils are limited. This review provides a comprehensive analysis of recent advancements in soil remediation technologies aiming to lower PFAS bioavailability by focusing on either sequestration or in situ degradation. Specifically, highly effective soil amendments such as clay minerals and activated carbon are often used for PFAS immobilization. However, despite their initial effectiveness, the long-term stability of sequestered PFAS may be compromised as a result of sorbent aging and soil condition changes, leading to the potential remobilization of the sorbed PFAS. In situ chemical degradation including advanced oxidation and advanced reduction processes can achieve long-term PFAS removal, especially by combining with other downstream treatment technologies. However, detailed studies are still lacking. This review highlighted several urgent research needs to advance PFAS remediation in soil and proposed new approaches such as an integrated approach that combines sequestration with chemical degradation to achieve more sustainable long-term stabilization and removal of PFAS from contaminated soils.

在土壤中检测到的全氟烷基和多氟烷基物质（PFAS）越来越多，它们通过在粮食作物中的积累对人类健康构成潜在风险。不幸的是，有效修复pfas污染土壤的选择是有限的。本文综述了土壤修复技术的最新进展，旨在通过集中于固存或原位降解来降低PFAS的生物利用度。具体来说，高效的土壤改良剂如粘土矿物和活性炭通常用于PFAS固定。然而，尽管它们具有最初的有效性，但由于吸附剂老化和土壤条件的变化，所吸附的PFAS的长期稳定性可能会受到损害，从而导致所吸附的PFAS的潜在再活化。包括高级氧化和高级还原工艺在内的原位化学降解可以实现PFAS的长期去除，特别是与其他下游处理技术相结合。然而，目前还缺乏详细的研究。这篇综述强调了推进土壤中PFAS修复的几个迫切的研究需求，并提出了新的方法，如将封存与化学降解相结合的综合方法，以实现更可持续的长期稳定和从污染土壤中去除PFAS。

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引用次数: 0

Oxygen-nanobubble-loaded biochar increases soil carbon sequestration in rice paddies 载氧纳米气泡生物炭增加稻田土壤固碳

Soil & Environmental Health

Pub Date : 2025-08-20 DOI: 10.1016/j.seh.2025.100174

Yiyu Lan , Qingnan Chu , Xiangyu Liu , Shuhan Xu , Detian Li , Chengming Zhang , Ping He , Xianwen Feng , Hanlin Zhang , Zhimin Sha

Enhancing soil carbon sequestration in flooded agroecosystems is critical for promoting soil health, improving crop productivity, and mitigating climate change. This study evaluated the role of oxygen nanobubble (ONB)-loaded biochar, an emerging oxygenation and carbon management tool, in modulating soil organic carbon (SOC) dynamics and microbial activity in rice paddy soil. A pot experiment was conducted with treatments involving biochar, ONB-loaded biochar, and iron plaque induction. The results show that ONB-loaded biochar increased SOC by 11–19% compared to the control group. This enhancement was attributed to two primary mechanisms: (1) suppression of hydrolase activity, including β-glucosidase and acid phosphatase, resulting in reduced decomposition of labile organic matter; and (2) increased oxidase activity, which facilitated the oxidation of phenolic compounds and promoted the formation of recalcitrant C-Fe complexes. Additionally, enzyme stoichiometry and vector analysis revealed stronger microbial carbon limitation and phosphorus limitation in ONB-loaded biochar treatments, particularly during the tillering and maturing stages. The formation of Fe plaques on the roots further modulated these effects by altering redox conditions and nutrient availability. These findings highlight ONB-loaded biochar as a sustainable soil amendment to strengthen long-term SOC storage, modulate microbial nutrient dynamics, and enhance soil biogeochemical functions in rice agroecosystems. This approach offers promising implications for advancing climate-smart and environmentally sound soil management strategies.

加强洪涝农业生态系统的土壤固碳对于促进土壤健康、提高作物生产力和减缓气候变化至关重要。研究了氧纳米泡（ONB）负载生物炭对水稻土壤有机碳（SOC）动态和微生物活性的调节作用。进行了生物炭、onb负载生物炭和铁斑块诱导处理的盆栽试验。结果表明，与对照组相比，添加onb的生物炭使土壤有机碳含量提高了11-19%。这种增强归因于两个主要机制：(1)水解酶活性受到抑制，包括β-葡萄糖苷酶和酸性磷酸酶，导致不稳定有机物的分解减少；(2)增加了氧化酶活性，促进了酚类化合物的氧化，促进了顽固性C-Fe络合物的形成。此外，酶化学计量和载体分析表明，onb负载生物炭处理的微生物碳限制和磷限制更强，特别是在分蘖期和成熟期。根上铁斑块的形成通过改变氧化还原条件和养分有效性进一步调节了这些影响。这些研究结果表明，onb生物炭作为一种可持续的土壤改质剂，在水稻农业生态系统中具有增强土壤有机碳长期储存、调节微生物养分动态和增强土壤生物地球化学功能的作用。这种方法为推进气候智慧型和环境无害化土壤管理战略提供了有希望的启示。

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引用次数: 0

Calcium as a confounding variable in phosphorus attribution: A commentary on Hu et al. (2025) 钙作为磷归因的混杂变量：评Hu等人（2025）

Soil & Environmental Health

Pub Date : 2025-07-22 DOI: 10.1016/j.seh.2025.100172

Xiaoming Zou

This letter questions the sole attribution of enhanced plant growth and arsenic accumulation to P availability in Hu et al. (2025), arguing that Ca, a co-delivered nutrient in all treatments, may be a confounding factor. Emerging evidence highlights Ca's critical role in plant growth, water use efficiency, and arsenic uptake, necessitating careful consideration in experimental designs. The letter recommends experimental designs that disentangle P and Ca effects to strengthen the mechanistic understanding of nutrient-driven phytoremediation.

这封信质疑Hu等人（2025）将植物生长增强和砷积累的唯一原因归结为磷有效性，认为所有处理中共同递送的营养元素Ca可能是一个混淆因素。新出现的证据强调了钙在植物生长、水分利用效率和砷吸收方面的关键作用，需要在实验设计中仔细考虑。这封信建议实验设计，解开P和Ca的影响，以加强对营养驱动的植物修复机制的理解。

引用次数: 0

Corrigendum regarding missing ethics approval statements in previously published articles 关于先前发表的文章中缺少伦理批准声明的更正

Soil & Environmental Health

Pub Date : 2025-07-01 DOI: 10.1016/j.seh.2025.100163

引用次数: 0

Stabilizing organic matter and reducing methane emissions during manure composting with biochar to strengthen the role of compost in soil health 利用生物炭稳定粪肥堆肥过程中的有机质，减少甲烷排放，增强堆肥对土壤健康的作用

Soil & Environmental Health

Pub Date : 2025-06-28 DOI: 10.1016/j.seh.2025.100164

Keiji Jindo , Tomonori Sonoki , Miguel A. Sánchez-Monedero

Biochar is a promising additive for enhancing composting efficiency and long-term compost quality. This study investigated its effects on greenhouse gas emissions and organic matter stabilization during the composting of poultry (PM) and cattle manure (CM). Biochar addition significantly reduced methane emissions during the thermophilic phase—by 4.6-fold in PM+B and 3.7-fold in CM+B compared to PM and CM without biochar amendment, respectively—indicating improved aeration and microbial activity, as supported by higher CO₂ emissions. A novel aspect of this study is the focus on lignin, a recalcitrant carbon fraction. Biochar-amended composts showed 1.5-fold greater lignin degradation (29.0 % in PM + B and 10.8 % in CM + B) than controls, along with enhanced lignin stability, as evidenced by Nuclear Magnetic Resonance spectroscopy and thermal analysis. We assessed labile carbon fractions (e.g., water-soluble carbon and carbohydrates), ATP, and enzymes involved in carbon and nutrient cycling. PM and CM retained more labile carbon through the final stage, showing higher ATP, dehydrogenase, and β-glucosidase than their biochar-treated counterparts. Redundancy analysis indicated that microbial communities and structural traits influenced gas emissions during the thermophilic stage and compost stabilization at the final stage. CH₄ emissions were associated with mcrA, fungi, and total nitrogen, while CO₂ correlated with bulk density and Gram-negative bacteria. In the final stage, maturity indices were linked with microbial and physicochemical variables, underscoring their combined role in compost stabilization. Biochar amendment enhanced compost quality by reducing CH₄ emission and promoting selective carbon transformation, particularly lignin. These findings support biochar-amended composting as a strategy for producing composts with improved agronomic and environmental value.

生物炭是一种很有前途的提高堆肥效率和长期堆肥质量的添加剂。本研究主要研究了禽粪（PM）和牛粪（CM）在堆肥过程中对温室气体排放和有机质稳定的影响。与未添加生物炭的PM和CM相比，添加生物炭显著降低了亲热期的甲烷排放量，PM+B和CM+B分别降低了4.6倍和3.7倍，表明曝气和微生物活性得到改善，二氧化碳排放量增加。本研究的一个新颖方面是关注木质素，一种顽固性碳组分。核磁共振波谱和热分析结果表明，生物炭改性堆肥的木质素降解率（PM + B为29.0%，CM + B为10.8%）是对照的1.5倍，木质素稳定性也有所提高。我们评估了不稳定的碳组分（如水溶性碳和碳水化合物）、ATP和参与碳和营养循环的酶。PM和CM在最后阶段保留了更多的不稳定碳，表现出更高的ATP、脱氢酶和β-葡萄糖苷酶。冗余分析表明，微生物群落和结构特征影响了嗜热阶段的气体排放和最后阶段的堆肥稳定。CH4排放量与mcrA、真菌和总氮相关，CO2排放量与容重和革兰氏阴性菌相关。在最后阶段，成熟度指标与微生物和物理化学变量相关，强调了它们在堆肥稳定中的综合作用。生物炭改性通过减少CH4排放和促进选择性碳转化，特别是木质素的转化，提高了堆肥质量。这些发现支持生物炭改性堆肥作为一种生产具有更好农艺和环境价值的堆肥的策略。

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引用次数: 0

Rhizosphere microbiota alleviate As accumulation in maize intercropped with peanut in long-term Cd and As co-contaminated farmland 长期镉砷共染农田根际微生物群对玉米间作花生砷积累的缓解作用

Soil & Environmental Health

Pub Date : 2025-06-17 DOI: 10.1016/j.seh.2025.100162

Tong Wu , Hong-Xin Sun , Li-Ping Geng , Shu-Shen Yang , Pei-Ying Xue , Pei-Pei Gao , Meng-Zhen Han , Wen-Ju Liu

Root-associated microbiota play an important role in regulating heavy metal transfter from soil to crops in contaminated areas. Maize-peanut intercropping is a cultivation pattern that directly influences the composition and function of the root-associated microbiota in farmland. However, it remains unclear whether this intercropping affects the accumulation of As and Cd in the edible parts of crops by altering the root microbial community in long-term As and Cd co-contaminated farmland. A field experiment was conducted to explore the mechanisms of intercropping maize-peanut on regulating the behaviors of As and Cd in soil-crop system by recruiting the specific root-associated microbial communities. The results demonstrated that intercropping maize-peanut significantly decreased the As concentration in the grains of intercropped maize (IM) up to 61.0 % compared with monocropping maize. Specifically, at the jointing stage, IM recruited the distinct root-associated microorganisms, including Actinobacteria Lechevalieria, Nocardioides, Agromyces, and Blastococcus, and Alphaproteobacteria norank_f__Geminicoccaceae. These microbial communities were closely associated with the As bioavailability in the rhizosphere soil and As accumulation in maize tissues, especially grain-As of IM. However, intercropping maize-peanut had no significant effect on Cd concentrations in the grains of either maize or peanut. This study verified that the intercropping maize-peanut might be a better approach to guarantee the safety of crop products in As-contaminated soil, but not in Cd- or Cd-As co-contaminated farmland.

根相关微生物群在重金属从土壤向作物转移的调控中起着重要作用。玉米-花生间作是一种直接影响农田根系微生物群组成和功能的栽培模式。然而，这种间作是否通过改变长期砷镉共污染农田的根系微生物群落来影响作物可食部分砷和镉的积累尚不清楚。通过田间试验，探讨玉米-花生间作通过招募特定根系相关微生物群落调节土壤-作物系统中砷和镉行为的机制。结果表明，与单作玉米相比，玉米-花生间作显著降低了间作玉米籽粒中砷的浓度，降幅达61.0%。具体而言，在节育阶段，IM招募了不同的根相关微生物，包括放线菌属Lechevalieria， Nocardioides， Agromyces和Blastococcus，以及Alphaproteobacteria norank_f__Geminicoccaceae。这些微生物群落与根际土壤中砷的生物有效性和玉米组织中砷的积累密切相关，特别是与玉米籽粒砷的积累密切相关。玉米-花生间作对玉米和花生籽粒Cd含量均无显著影响。在砷污染土壤中，玉米-花生间作可能是保证作物产品安全的较好方法，而在Cd或Cd- as共污染农田中则不然。

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引用次数: 0

An integrated approach for determining the spatial distribution, source apportionment and human health risks of PAHs in soils of rapidly-urbanized areas 快速城市化地区土壤中多环芳烃的空间分布、来源分配及人体健康风险综合分析方法

Soil & Environmental Health

Pub Date : 2025-05-29 DOI: 10.1016/j.seh.2025.100161

Lingzhi Luo , Xiaoyong Liao , Huan Tao , You Li , Liang Wang , Hongying Cao , Yonghua Li , Weiwei Shi , Tianyi Wang

The rise of large urban agglomerations has exacerbated pollutant emissions, resulting in regional soil contamination with polycyclic aromatic hydrocarbons (PAHs), which jeopardizes the development of urban agglomerations and affects human health. There is a lack of research in this area in the Beijing-Tianjin-Hebei region, with the existing studies on PAHs in soil in the larger region often neglecting the spatial heterogeneity of the pollution sources and systematic analysis of risk assessment. This study introduces the Distribution-Source-Risk framework, analyzed soil PAH pollutants in the region, and examined PAH sources, distribution patterns, and associated health risks. Random forest modeling was employed to map PAH distribution in the BTH soils. City classification analysis was conducted based on the derived pollution levels and urbanization degree, resulting in four city types: high urbanization and high pollution, high urbanization and low pollution, low urbanization and high pollution, and low urbanization and low pollution. Primary PAH sources include coal-burning (29%), coking (25%), traffic (25%), and biomass-burning (21%), with varying contributions based on city types. The overall order of human health risks was coal-burning > traffic > coking > biomass-burning sources. Finally, differen policies for soil PAH PAH management (such as energy transition and green infrastructure) were elaborated to promote coordinated development of regional urbanization environment. In summary, this research offers a comprehensive approach, linking processes to provide a precise understanding of pollution across different entities (cities, sources, and populations). Our findings reveal distinct pollution patterns across city types and highlight targeted mitigation priorities and provide a systematic, data-driven framework for regional soil PAH management and public health protection.

大型城市群的兴起加剧了污染物的排放，造成区域土壤多环芳烃污染，危害了城市群的发展，影响了人类健康。京津冀地区对多环芳烃的研究较少，现有的大区域土壤多环芳烃研究往往忽略了污染源的空间异质性和风险评价的系统分析。本研究引入了分布-来源-风险框架，分析了该地区土壤多环芳烃污染物，研究了多环芳烃的来源、分布模式和相关的健康风险。采用随机森林模型绘制BTH土壤中多环芳烃的分布。根据导出的污染水平和城市化程度对城市进行分类分析，得出高城市化高污染、高城市化低污染、低城市化高污染、低城市化低污染、低城市化低污染四种城市类型。多环芳烃的主要来源包括燃煤（29%）、焦化（25%）、交通（25%）和生物质燃烧（21%），不同城市类型的贡献不同。人类健康风险排序依次为燃煤和燃煤；交通比;炼焦祝辞生物质资源。最后，阐述了土壤多环芳烃管理的不同政策（如能源转型和绿色基础设施），以促进区域城市化环境的协调发展。总之，这项研究提供了一种综合的方法，将不同的过程联系起来，以提供对不同实体（城市、来源和人口）污染的精确理解。我们的研究结果揭示了不同城市类型的不同污染模式，突出了有针对性的缓解重点，并为区域土壤多环芳烃管理和公共卫生保护提供了一个系统的、数据驱动的框架。

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引用次数: 0