Journal of Environmental Chemical Engineering最新文献_第5页

Nanocellulose from oil palm biomass: A pathway to sustainable high-performance paper and packaging materials 来自油棕生物质的纳米纤维素：通往可持续高性能纸张和包装材料的途径

IF 7.2 2区工程技术 Q1 ENGINEERING, CHEMICAL

Journal of Environmental Chemical Engineering

Pub Date : 2026-01-19 DOI: 10.1016/j.jece.2026.121311

Mohamad Putra Hakim Razali , R.A. Ilyas , Tengku Arisyah Tengku Yasim-Anuar , Hazwani Husin , H.S.N. Hawanis , Nadlene Razali

Oil palm biomass, particularly empty fruit bunches and fronds, represents an abundant and underutilised lignocellulosic resource that can be transformed into nanocellulose for sustainable paper and packaging applications. This review introduces the novelty of linking the entire value chain, beginning with the chemical and morphological characteristics of oil palm residues and progressing through green extraction strategies and reinforcement mechanisms that influence final paper performance. Environmentally conscious extraction methods, including enzymatic pretreatment, deep eutectic solvent processing, and combined chemical and mechanical fibrillation, are discussed in terms of their ability to reduce energy consumption, minimise chemical discharge, and improve cellulose accessibility. These methods support the production of nanocellulose with high aspect ratio, crystallinity, and surface reactivity, which enhances paper density, tensile and burst strength, surface smoothness, porosity control, and barrier performance. The review also examines techno economic and biorefinery considerations, highlighting challenges such as solvent recovery, process scalability, and cost, as well as opportunities involving continuous flow systems and integrated biorefinery models that improve production efficiency. Overall, transforming oil palm biomass into nanocellulose provides a strategic pathway for valorising agricultural waste, reducing dependence on wood fibres, and accelerating the development of sustainable, high-performance paper and packaging materials that support circular bioeconomy objectives.

油棕生物质，特别是空果束和叶子，代表着丰富的、未充分利用的木质纤维素资源，可以转化为纳米纤维素，用于可持续纸张和包装应用。本文介绍了连接整个价值链的新颖性，从油棕残留物的化学和形态特征开始，并通过影响最终纸张性能的绿色提取策略和强化机制进行进展。环境意识的提取方法，包括酶预处理，深度共晶溶剂处理，结合化学和机械纤颤，讨论了他们的能力，减少能源消耗，减少化学排放，提高纤维素的可及性。这些方法支持生产具有高长宽比、结晶度和表面反应性的纳米纤维素，从而提高纸张密度、拉伸和破裂强度、表面光滑度、孔隙度控制和阻隔性能。该综述还考察了技术经济和生物炼制的考虑因素，强调了溶剂回收、工艺可扩展性和成本等挑战，以及涉及连续流系统和集成生物炼制模型的机会，以提高生产效率。总的来说，将油棕生物质转化为纳米纤维素为农业废弃物的增值、减少对木纤维的依赖以及加速可持续、高性能纸张和包装材料的开发提供了一条战略途径，从而支持循环生物经济目标。

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引用次数: 0

Recasting acid mine drainage treatment: Synergistic bioremediation by microalgae–sulfate-reducing bacteria consortia 重铸酸性矿井废水处理：微藻-硫酸盐还原菌群协同生物修复

IF 7.2 2区工程技术 Q1 ENGINEERING, CHEMICAL

Journal of Environmental Chemical Engineering

Pub Date : 2026-01-19 DOI: 10.1016/j.jece.2026.121329

Yijing Chen , Huijun Xi , Jian Wu , Haiyu Zhong , Sicheng Xu , Zhenyu Zhang , Ke Zhang , Li Zeng , Jing Wang , Zhendong Yang

Acid mine drainage (AMD) contains extreme acidity and high metal loads that challenge conventional treatments and drive interest in biological alternatives. This review evaluates microalgae–sulfate-reducing bacteria (SRB) consortia as an emerging platform for AMD remediation. Microalgae elevate pH through photosynthetic proton consumption and provide biodegradable organics, while SRB reduce sulfate to sulfide and immobilize metals as sulfide precipitates. Their spatial organization can generate complementary microenvironments that mitigate oxygen release from phototrophs and preserve the anaerobic conditions required for sulfate reduction. Consortium performance depends strongly on pH, redox potential, temperature, salinity, and mixed-metal stresses, indicating that environmental fluctuations govern metabolic coupling. Engineering strategies have advanced from simple suspended cultures to immobilized and biofilm-based systems that enhance biomass retention, buffering capacity, and stratified niche formation. Laboratory studies demonstrate promising removal of sulfate and dissolved metals under acidic, metal-rich conditions, yet major barriers remain, including narrow strain tolerance and persistent oxygen–anaerobiosis conflicts. Future progress requires strain discovery, mechanistic insight, and reactor designs tailored to AMD variability to achieve stable performance at scale.

酸性矿井废水（AMD）含有极高的酸度和高金属负荷，这对常规处理提出了挑战，并引起了人们对生物替代方案的兴趣。本文评价了微藻硫酸盐还原菌（SRB）联合体作为AMD修复的新兴平台。微藻通过光合作用消耗质子提高pH值，提供可生物降解的有机物，而SRB则将硫酸盐还原为硫化物，并将金属固定为硫化物沉淀。它们的空间组织可以产生互补的微环境，减轻光养生物的氧气释放，并保持硫酸盐还原所需的厌氧条件。联合体的性能在很大程度上取决于pH值、氧化还原电位、温度、盐度和混合金属应力，表明环境波动控制着代谢耦合。工程策略已经从简单的悬浮培养发展到固定化和基于生物膜的系统，这些系统增强了生物量的保留、缓冲能力和分层生态位的形成。实验室研究表明，在酸性、富金属条件下，硫酸盐和溶解金属的去除是有希望的，但主要的障碍仍然存在，包括狭窄的菌株耐受性和持续的厌氧冲突。未来的进展需要应变发现、机理洞察和针对AMD可变性量身定制的反应器设计，以实现大规模的稳定性能。

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引用次数: 0

Research on full life cycle and entire process control of heavy metal pollutants in metal mining 金属矿山重金属污染物全生命周期及全过程控制研究

IF 7.2 2区工程技术 Q1 ENGINEERING, CHEMICAL

Journal of Environmental Chemical Engineering

Pub Date : 2026-01-19 DOI: 10.1016/j.jece.2026.121345

Congshuo Zhao, Yinghua Li, Chaoqun Zhu, Mingchuan Zhang

The synthesis of existing studies demonstrates that heavy-metal behavior in metal mining systems is strongly stage-dependent and governed by distinct dominant mechanisms along the full life cycle. However, current research and management practices remain fragmented, often focusing on isolated stages or single environmental media, and are constrained by limited predictive capability and insufficient integration of technical, economic, and governance dimensions, particularly under increasing climatic variability. Based on these findings, this review develops an integrated lifecycle framework. The framework includes a coupled hydrological–geochemical–microbial predictive model to simulate long-term contaminant fate, a multi-media synergistic risk assessment method designed to identify critical cross-media exposure pathways, and a set of adaptive management strategies that combine technology trade-off analysis with innovative instruments—such as a life-cycle environmental liability fund and community co-governance mechanisms—to bridge the gap between technical solutions and sustainable implementation. Collectively, this systematic framework provides a actionable pathway toward predictive, resilient, and sustainable governance of heavy-metal pollution across the entire mining lifecycle.

综合现有研究表明，重金属在金属采矿系统中的行为具有很强的阶段依赖性，并且在整个生命周期中受到明显的主导机制的支配。然而，目前的研究和管理实践仍然是碎片化的，往往侧重于孤立的阶段或单一的环境介质，并且受到有限的预测能力和技术、经济和治理维度整合不足的限制，特别是在气候变化日益增加的情况下。基于这些发现，本文开发了一个集成的生命周期框架。该框架包括一个耦合的水文-地球化学-微生物预测模型，用于模拟污染物的长期命运，一个多媒体协同风险评估方法，旨在确定关键的跨媒介暴露途径，以及一套适应性管理战略，将技术权衡分析与创新工具（如生命周期环境责任基金和社区共同治理机制）相结合，弥合技术解决方案与可持续实施之间的差距。总的来说，这一系统框架为在整个采矿生命周期内对重金属污染进行预测性、弹性和可持续治理提供了一条可行的途径。

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引用次数: 0

Conductive materials in anaerobic digestion: Mechanisms of process intensification and regulations of microbial metabolisms 厌氧消化中的导电材料：过程强化机制和微生物代谢调节

IF 7.2 2区工程技术 Q1 ENGINEERING, CHEMICAL

Journal of Environmental Chemical Engineering

Pub Date : 2026-01-18 DOI: 10.1016/j.jece.2026.121305

Yuxin He , Shanying He , Juncong Zou , Dexin Wang , Xiang Li , Qiuya Niu , Chunping Yang

Anaerobic digestion (AD) technology has been widely adopted globally due to its multiple advantages in environmental soundness, energy recovery, and resource recycling. Conductive materials (CMs) are emerging tools to enhance AD stability and methane yield, and have garnered growing attention and significance. Firstly, this review systematically expounds on the current applications of CMs and further explores the potential enhancement mechanisms of CMs. Among these aspects, it analyzes the mechanisms underlying the enhancement of DIET by CMs and the synergistic effects between CMs and quorum sensing signaling molecules in enhancing AD system. Secondly, the effects of CMs on microorganisms are summarized. Specifically, CMs can enrich functional microbial populations and enhance metabolic activity. Thirdly, the current challenges are outlined and future research directions are discussed. This review is intended to provide valuable references for investigating the applications of CMs in AD, thereby facilitating the development of more economical and efficient strategies for AD optimization.

厌氧消化（AD）技术因其在环保、能源回收和资源循环等方面的优势而在全球范围内得到广泛应用。导电材料（CMs）是提高AD稳定性和甲烷产率的新兴工具，受到越来越多的关注和重视。本文首先系统阐述了CMs的应用现状，并进一步探讨了CMs的潜在增强机制。其中，分析了CMs增强AD系统的机制，以及CMs与群体感应信号分子在AD系统中的协同作用。其次，综述了CMs对微生物的影响。具体来说，CMs可以丰富功能性微生物种群，增强代谢活性。第三，概述了当前面临的挑战，并对未来的研究方向进行了讨论。本文旨在为研究CMs在AD中的应用提供有价值的参考，从而促进开发更经济高效的AD优化策略。

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引用次数: 0

Triad of lignocellulosic biomass pretreatment: Unlocking potential of primary biorefinery key aspect 木质纤维素生物质预处理三位一体：释放初级生物炼制潜力的关键方面

IF 7.2 2区工程技术 Q1 ENGINEERING, CHEMICAL

Journal of Environmental Chemical Engineering

Pub Date : 2026-01-17 DOI: 10.1016/j.jece.2026.121291

Samuel Ntakirutimana , Zhihao Fan , Wenlong Xiong , Shen Zhang , Kai Wang , Bing-Zhi Li , Jingliang Xu

Pretreatment is the key aspect of the primary biorefinery, and leveraging its consolidated processing potential is crucial for making valorisation of lignocellulose more economical and efficient. In fact, pretreatment is not only about making the biomass more accessible and susceptible to further processing, but also creating valorisation opportunities through a multidimensional transformation. For instance, the use of functional and reactive pretreatment solvents induces the release of upgraded products without additional chemicals or energy consumption. This review provides a comprehensive understanding of lignocellulose pretreatment in the context of triad that unifies conversion (deconstruction, phase transition, fluorescence, bleaching etc.), functionalization (amination, esterification, etherification, oxidation etc.) and fractionation (dissolution, separation, precipitation, recovery, etc). It also presents pretreatment as a promising platform for in situ upgrading and preparation of functional materials with blended properties of lignin and polysaccharides for high-performance applications.

预处理是初级生物精炼厂的关键方面，利用其综合处理潜力对于使木质纤维素的增值更加经济和高效至关重要。事实上，预处理不仅是为了使生物质更容易获得，更容易进一步加工，而且还通过多维转换创造了价值增值的机会。例如，使用功能性和反应性预处理溶剂可以在不增加化学品或消耗能源的情况下释放升级产品。本文综述了木质纤维素预处理在转化（分解、相变、荧光、漂白等）、功能化（胺化、酯化、醚化、氧化等）和分馏（溶解、分离、沉淀、回收等）三联体背景下的综合认识。预处理是原位升级和制备具有木质素和多糖混合性能的高性能功能材料的一个有前途的平台。

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引用次数: 0

Towards low-carbon zinc extraction from zinc-containing electric arc furnace dust: A review of pyrometallurgical and hydrometallurgical routes 从含锌电弧炉粉尘中提取低碳锌：火法和湿法两种方法综述

IF 7.2 2区工程技术 Q1 ENGINEERING, CHEMICAL

Journal of Environmental Chemical Engineering

Pub Date : 2026-01-16 DOI: 10.1016/j.jece.2026.121284

Yuqian Liu , Haichuan Li , Liling Jin , Dongdong Zhou , Shiyuan Liu

Zinc-containing electric arc furnace dust (ZEAFD) is a zinc-rich by-product of steelmaking that is simultaneously classified as hazardous waste and recognized as a valuable secondary resource. Green and efficient zinc recovery from ZEAFD is therefore essential for sustainable resource utilization and pollution control under dual-carbon constraints. This review first outlines the generation mechanisms and key physicochemical characteristics of ZEAFD. We then summarize and critically compare pyrometallurgical and hydrometallurgical routes for the extraction of zinc, covering conventional pyrometallurgical processes such as Waelz kiln process and hydrometallurgical processes such as acid leaching process. Particular emphasis is placed on emerging, greener options—microwave heating, hydrogen-based reduction, and roasting with water leaching process—which are designed to reduce fossil carbon use, operating temperature or reagent consumption while improving the separation between zinc and iron. Across these technologies, we contrast zinc recovery, selectivity, energy demand, potential carbon emissions and technical maturity, thereby revealing their respective advantages, limitations and applicability. Finally, key challenges and research needs for scalable, low-carbon ZEAFD treatment are identified. This work provides a concise process-level framework and guidance for the green and sustainable extraction of zinc from ZEAFD in the steel industry.

含锌电弧炉粉尘是一种富含锌的炼钢副产物，既被列为危险废物，又被认为是一种有价值的二次资源。因此，从ZEAFD中绿色高效地回收锌对于双碳约束下的可持续资源利用和污染控制至关重要。本文首先综述了ZEAFD的产生机理和主要理化特性。然后，我们总结并批判性地比较了火法和湿法提取锌的路线，包括传统的火法工艺，如Waelz窑工艺和湿法冶金工艺，如酸浸工艺。特别强调的是新兴的、更环保的选择——微波加热、氢基还原和水浸焙烧工艺——旨在减少化石碳的使用、操作温度或试剂消耗，同时改善锌和铁之间的分离。在这些技术中，我们对比了锌的回收率、选择性、能源需求、潜在碳排放量和技术成熟度，从而揭示了各自的优势、局限性和适用性。最后，确定了可扩展的低碳ZEAFD处理的主要挑战和研究需求。这项工作为钢铁工业从ZEAFD中绿色和可持续地提取锌提供了一个简明的过程级框架和指导。

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引用次数: 0

Global trends and perspectives in soil stabilization/solidification technologies: A three-decade bibliometric analysis focused on heavy metal remediation and sustainable applications 土壤稳定/固化技术的全球趋势与展望：重金属修复及其可持续应用的三十年文献计量分析

IF 7.2 2区工程技术 Q1 ENGINEERING, CHEMICAL

Journal of Environmental Chemical Engineering

Pub Date : 2026-01-16 DOI: 10.1016/j.jece.2026.121279

Hongwei Wang, Kaifeng Xu, Longjun Dong, Daoyuan Sun

Soil security is important for global ecological stability and sustainable development. In response to the increasingly severe problem of soil pollution during industrialization, soil stabilization/solidification (S/S) technology has emerged to block contaminant migration and facilitate their effective transformation and removal. Based on the Web of Science database from 1995 to 2024, this study systematically analyzes the research evolution of this field over three decades using bibliometric methods. The results indicated that the annual global publication output has grown exponentially, averaging over 1000 publications per year over the last five years. Contributions by country are highly concentrated: China leads with 4965 publications, accounting for 30.6 %, and, together with the USA and Germany, the top three countries account for 57 % of total publications, forming the dominant forces in the field. Research hotspots focus on the immobilization mechanisms and technical applications of novel materials, such as biochar and geopolymers, for heavy metal remediation. The technology has been widely applied across seven major engineering fields, including agriculture, road construction, and environmental engineering, demonstrating excellent multi-scenario applicability. The synergistic application of various S/S technologies shows great potential in addressing complex engineering challenges. However, the lack of a standardized system continues to hinder its universal applicability and widespread adoption. In conclusion, soil S/S technology has established a comprehensive research framework spanning from mechanistic understanding to engineering practice. Future efforts should focus on establishing standardized systems, optimizing the synergies among multiple technologies, and leveraging artificial intelligence to enhance its role in global environmental governance and sustainable development.

土壤安全对全球生态稳定和可持续发展具有重要意义。为了应对工业化过程中日益严重的土壤污染问题，土壤稳定/固化（S/S）技术应运而生，它可以阻断污染物的迁移，促进污染物的有效转化和去除。本文基于1995 ~ 2024年Web of Science数据库，运用文献计量学方法系统分析了该领域近30年来的研究演变。结果表明，全球年度出版物产量呈指数增长，在过去五年中平均每年出版1000多份出版物。国家的贡献高度集中：中国以4965篇论文领先，占30.6% %，前三名与美国、德国一起占总论文量的57. %，形成了该领域的主导力量。研究热点主要集中在生物炭、地聚合物等新型材料在重金属修复中的固定化机理和技术应用。该技术已广泛应用于农业、道路建设、环境工程等七大工程领域，具有出色的多场景适用性。各种S/S技术的协同应用在解决复杂工程挑战方面显示出巨大的潜力。然而，缺乏标准化的系统继续阻碍其普遍适用性和广泛采用。总之，土壤S/S技术已经建立了一个从机理认识到工程实践的综合研究框架。未来应着力建立规范的体系，优化多种技术的协同作用，发挥人工智能在全球环境治理和可持续发展中的作用。

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引用次数: 0

Hybrid photocatalytic–microbial fuel cells systems: Progress, challenges, and forecasts in water-energy-environment nexus 混合光催化-微生物燃料电池系统：水-能源-环境关系的进展、挑战和预测

IF 7.2 2区工程技术 Q1 ENGINEERING, CHEMICAL

Journal of Environmental Chemical Engineering

Pub Date : 2026-01-15 DOI: 10.1016/j.jece.2026.121270

Rabia Tasaduq Hussain , Baala H. Anandapadmanaban , Chi-Wen Lin , Shu-Hui Liu , Jun Haslinda Shariffuddin

The growing demand for sustainable water purification and renewable energy recovery has propelled hybrid photocatalytic–microbial fuel cell (photo−MFC) systems to the forefront of environmental engineering. These coupled configurations merge semiconductor-driven redox reactions with bioelectrochemical energy conversion, creating a self-sustaining process that simultaneously degrades pollutants and generates electricity. This review critically discusses the advances, mechanisms, types, and design innovations in hybrid photo-MFC systems, with a particular emphasis on charge-transfer pathways, the physicochemical compatibility between photocatalysts, electrodes, and electroactive biofilms, and the influence of reactor architecture on system performance. Studies on key advances in visible-light-responsive semiconductors, nanostructured electrodes, and integrated reactor architectures increasing photon utilization and e⁻ recovery are analysed. Current challenges related to power density, catalyst durability, biofouling, and scalability are identified. The paper concludes with a future perspective on emerging trends such as 3D-printed biochar photoelectrodes, machine-learning-guided reactor optimization, and techno-economic evaluations needed for industrial-level development. By integrating insights from diverse interdisciplinary fields, this review outlines strategic pathways for advancing hybrid photo−MFC technologies towards the circular and energy-positive treatment of wastewater.

对可持续水净化和可再生能源回收日益增长的需求推动了混合光催化微生物燃料电池（photo - MFC）系统成为环境工程的前沿。这些耦合结构将半导体驱动的氧化还原反应与生物电化学能量转换结合在一起，创造了一个同时降解污染物和发电的自我维持过程。本文综述了混合光- mfc系统的进展、机制、类型和设计创新，特别强调了电荷转移途径、光催化剂、电极和电活性生物膜之间的物理化学相容性，以及反应器结构对系统性能的影响。分析了可见光响应半导体、纳米结构电极和提高光子利用率和e-回收率的集成反应器结构的关键进展。目前的挑战与功率密度、催化剂耐久性、生物污垢和可扩展性有关。论文最后对新兴趋势进行了展望，如3d打印生物炭光电极、机器学习引导的反应器优化以及工业级发展所需的技术经济评估。通过整合不同跨学科领域的见解，本文概述了推进混合光- MFC技术实现废水循环和能源积极处理的战略途径。

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引用次数: 0

Design of monopyridine amine extractant for selective heavy rare earth element extraction 选择性萃取重稀土元素的单吡啶胺萃取剂设计

IF 7.2 2区工程技术 Q1 ENGINEERING, CHEMICAL

Journal of Environmental Chemical Engineering

Pub Date : 2026-01-15 DOI: 10.1016/j.jece.2026.121221

Miaomiao Zhang , Heng Zhao , Zhen Yang , Xingwei Luo

The separation of rare earth elements is a challenging task due to their similar chemical behavior. As research into rare earth separation technology has progressed, the molecular structure design of the extractant has gradually become a research focus. In this paper, the molecular system of mono-pyridine amine extractant based on positional isomerization effect was constructed by precise structural regulation, and the o/m/p substituted pyridine amine extractant system (N-o/m/pPyMChA) was prepared. The investigation into the extraction conditions, including extraction time, diluent type, pH, and extraction temperature, has concluded that N-mPyMChA exhibits the optimal extraction capacity. The underlying reason for its structural superiority was analyzed by electrostatic potential analysis. N-PyMChA exhibits separation potential for light and heavy rare earth elements, with better selectivity for the latter. Density functional theory (DFT) calculation, including gas phase binding energy, Gibbs free energy in the gas phase, WBI bond order, and Mulliken charge, was utilized to reveal the selectivity of N-PyMChA towards heavy rare earth elements. The separation factor of N-mPyMChA between adjacent REEs, Er^3 + and Tm³⁺, is 4.18. The findings of this study have yielded novel insights into the separation of rare earth elements, providing a novel approach to the field.

稀土元素的分离是一项具有挑战性的任务，因为它们具有相似的化学性质。随着稀土分离技术研究的深入，萃取剂的分子结构设计逐渐成为研究热点。本文通过精确的结构调控，构建了基于位置异构化效应的单吡啶胺萃取剂分子体系，制备了o/m/p取代吡啶胺萃取剂体系（N-o/m/pPyMChA）。通过对提取时间、稀释剂类型、pH、提取温度等条件的考察，得出N-mPyMChA具有最佳的提取能力。通过静电势分析，分析了其结构优势的根本原因。N-PyMChA对轻、重稀土元素均具有分离潜力，对重稀土元素具有较好的选择性。利用密度泛函数理论（DFT）计算，包括气相结合能、气相Gibbs自由能、WBI键序和Mulliken电荷，揭示了N-PyMChA对重稀土元素的选择性。相邻稀土元素Er3 +和Tm3+之间N-mPyMChA的分离因子为4.18。这项研究的发现对稀土元素的分离产生了新的见解，为该领域提供了一种新的方法。

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引用次数: 0

Insight into the mechanism of doxycycline promoting N2O emissions during swine manure composting 强力霉素促进猪粪堆肥过程中N2O排放的机理研究

IF 7.2 2区工程技术 Q1 ENGINEERING, CHEMICAL

Journal of Environmental Chemical Engineering

Pub Date : 2026-01-15 DOI: 10.1016/j.jece.2026.121266

Chengyu Ma , Yunfeng Qian , Bingbing Xing , Han Xiao , Hao Zhu , Shanshuai Chen , Wei Gao , Xin Jin , Huanyu Bao , Yunze Ruan

As a second-generation tetracycline, doxycycline (DOX) is increasingly substituting traditional tetracycline antibiotics in animal husbandry. The emission of nitrous oxide (N₂O) during composting makes a substantial contribution to the ozone depletion and greenhouse effect. Nevertheless, understanding the influence of DOX residues on N₂O emissions during composting still poses a challenge. Here, this research explored the impacts of various DOX concentrations (0, 10, and 100 mg/kg) on nitrogen transformation and the emissions of N₂O during swine manure composting. The results found that high content of DOX (100 mg/kg, T2) markedly promoted N₂O emissions, which increased by 503.80 % compared with no DOX addition (CK). DOX enhanced nitrification, leading to nitrate (NO₃⁻-N) accumulation, which provided more substrate for denitrification. Metagenomic and 16S rRNA analyses revealed DOX increased the key denitrifying functional genes (norB, nirS, narG , and nirK) abundance and enriched N₂O-producing microorganisms, while suppressing the abundance of the N₂O-reducing gene nosZ and its host bacteria. Partial least squares structural equation modeling (PLS-SEM) and random forest further confirmed that the increased N₂O emissions under the high DOX concentration treatment were primarily attributable to the elevated abundances of key microorganisms and the accumulation of denitrification substrates. This study elucidates the mechanistic pathways by which DOX exacerbates N₂O emissions, providing critical insights for mitigating N₂O from the composting of antibiotic-contaminated manure.

多西环素（doxycycline， DOX）作为第二代四环素，在畜牧业中日益取代传统的四环素类抗生素。在堆肥过程中排放的一氧化二氮（N₂O）对臭氧消耗和温室效应做出了重大贡献。然而，了解堆肥过程中DOX残留物对N₂O排放的影响仍然是一个挑战。本研究探讨了不同DOX浓度（0、10和100 mg/kg）对猪粪堆肥过程中氮转化和N₂O排放的影响。结果发现，高DOX含量（100 mg/kg, T2）显著促进了N₂O排放量，与未添加DOX （CK）相比，N₂O排放量增加了503.80 %。DOX增强硝化作用，导致硝酸盐（NO₃⁻-N）积累，为反硝化提供了更多的基质。宏基因组和16S rRNA分析显示，DOX增加了关键反硝化功能基因（norB、nirS、narG和nirK）的丰度，并丰富了产N₂的微生物，同时抑制了N₂还原基因nosZ及其宿主细菌的丰度。偏最小二乘结构方程模型（PLS-SEM）和随机森林进一步证实了高DOX浓度处理下N₂O排放量增加的主要原因是关键微生物丰度的增加和反硝化底物的积累。本研究阐明了DOX加剧N₂O排放的机制途径，为减少抗生素污染粪便堆肥中的N2O提供了重要见解。

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引用次数: 0