Environmental Technology & Innovation最新文献_第9页

Optimal bioaugmentation fosters a highly integrated and efficient microbial network for rapid trichloroethene dechlorination 最佳的生物增强培养了一个高度集成和高效的微生物网络，用于快速三氯乙烯脱氯

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

Environmental Technology & Innovation

Pub Date : 2025-12-05 DOI: 10.1016/j.eti.2025.104682

Hyunsu Kim , Jaejin Lee , Hyunsoo Lim , Kangsuk Kim , Keum Ju Yoon , Joonhong Park , Keunje Yoo

Bioaugmentation is a leading strategy for remediating groundwater contaminated with chlorinated ethenes. However, the optimized dosage to enhance synergetic interactions between consortia and electron donors remains poorly defined. This study investigated the effects of co-injecting a dechlorinating consortium (acclimated JL-1(KCTC11782BP)) at varying concentrations (0–10 % v/v) with lactate (0–1000 mM) on trichloroethene (TCE) degradation in microcosm systems over 40 days. Complete dechlorination of ethene occurred within 20 days across all treatments except 1000 mM lactate, which suppressed activity. The fastest and most robust response arose at 5.3 % acclimated JL-1 with 530 mM lactate, yielding ethene within 5 days. Quantitative PCR showed ∼10-fold enrichment of Dehalococcoides mccartyi tceA during complete TCE removal, and tceA abundance correlated positively with ethene production (p < 0.05). The presence of fermenting bacteria, including Pelosinus, Acetobacterium, and Sporomusa, was crucial for providing essential electron donors and nutrients to support the activity of organohalide-respiring bacteria, particularly Dehalococcoides. With a 5.3 % acclimated JL-1 and 530 mM lactate co-injection, dechlorination facilitated the development of a highly integrated microbial network, characterized by a low network diameter (2), a high average clustering coefficient (0.99), and a short average path length (1.045), all indicative of highly efficient and coordinated microbial interactions. These data delineate quantitative operating ranges for consortium and donor addition, identify an inhibitory upper bound for lactate, and mechanistically link community topology to dechlorination rates. This study can provide tunable, data-driven parameters for field bioaugmentation design, including initial JL-1 loading, lactate setpoints, and monitoring biomarkers.

生物强化是修复地下水中氯代乙烯污染的主要策略。然而，提高财团和电子给体之间协同作用的最佳剂量仍然不明确。本研究研究了不同浓度（0-10 % v/v）的脱氯组合（驯化的JL-1(KCTC11782BP)）与乳酸（0-1000 mM）共注射40天对微观系统中三氯乙烯（TCE）降解的影响。除1000 mM乳酸盐抑制活性外，所有处理的乙烯在20天内完全脱氯。在530 mM乳酸浓度为5.3% %时，JL-1的响应速度最快，在5天内产生乙烯。定量PCR结果显示，在完全去除TCE过程中，Dehalococcoides mccartyi的tceA丰度富集约10倍，tceA丰度与乙烯产量呈正相关（p <； 0.05）。包括Pelosinus、Acetobacterium和Sporomusa在内的发酵细菌的存在对于提供必要的电子供体和营养物质以支持有机盐呼吸细菌（特别是dehalococides）的活性至关重要。通过5.3 %驯化的JL-1和530 mM乳酸共注入，脱氯促进了高度整合的微生物网络的发展，其特点是网络直径小(2)，平均聚类系数高（0.99），平均路径长度短（1.045），所有这些都表明微生物相互作用高效协调。这些数据描述了联合体和供体添加的定量操作范围，确定了乳酸的抑制上限，并将群落拓扑结构与脱氯速率机械地联系起来。该研究可以为现场生物增强设计提供可调的数据驱动参数，包括初始JL-1加载、乳酸设定值和监测生物标志物。

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引用次数: 0

Microplastics and trace metals across the drinking water supply system of Addis Ababa, Ethiopia: A case study for low and middle-income countries 埃塞俄比亚亚的斯亚贝巴饮用水供应系统中的微塑料和微量金属：低收入和中等收入国家的案例研究

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

Environmental Technology & Innovation

Pub Date : 2025-12-05 DOI: 10.1016/j.eti.2025.104684

Selamawit Gebremedhin Tekle , Kassaye Tolessa Sherge , Esayas Alemayehu , Maaike Vercauteren , Jana Asselman

Despite growing global concern about the potential public health impacts of microplastics and trace metals in drinking water, data from low and middle-income countries remain limited, particularly for microplastics, due to outdated and inconsistent sampling and analysis methods. Therefore, we examined microplastics and trace metals in tap water in Addis Ababa, Ethiopia, using advanced spectroscopic techniques as a case study for lower and middle-income countries. Samples were collected from randomly selected standard and slum areas of Addis Ababa during the dry and wet seasons, which included 71 samples analysed for microplastics with μFTIR spectroscopy and 48 samples analysed for dissolved trace metals with ICP-OES. Microplastics were detected in all tap water samples, with concentrations ranging from 0.004 to 1.33 MP L⁻¹ (average = 0.31 ± 0.31 MP L⁻¹), comparable to values in high-income countries. Statistically higher concentrations were measured in slum areas (0.41 ± 0.33 MPs/L) and during the wet season (0.36 ± 0.34 MPs/L). Polypropylene and polyethylene were the most common polymers, and particles sized 25–125 μm were predominant. Dissolved Ba, Zn, V, Cu, and Fe, with mean concentrations of 28.3 ± 6.5, 16.2 ± 19.7, 7.5 ± 0.5, 7.0 ± 2.6, and 5.1 ± 3.7 µg/L, respectively, were the only trace metals detected, showing no significant variation across locations or seasons and remaining below WHO and national drinking water guidelines. Estimated daily intake (EDI) and hazard index (HI) values of trace metals indicated minimal non-carcinogenic risk. No significant correlation was found between microplastic and trace metal concentrations. Overall, drinking water contamination levels were comparable to those reported in high-income countries.

尽管全球日益关注饮用水中微塑料和微量金属的潜在公共健康影响，但由于采样和分析方法过时和不一致，来自低收入和中等收入国家的数据仍然有限，特别是关于微塑料的数据。因此，我们对埃塞俄比亚亚的斯亚贝巴自来水中的微塑料和微量金属进行了检测，使用先进的光谱技术作为中低收入国家的案例研究。在干湿季节，随机选择亚的斯亚贝巴的标准区和贫民窟采集样品，其中71个样品用μFTIR光谱分析微塑料，48个样品用ICP-OES分析溶解微量金属。在所有自来水样品中都检测到微塑料，浓度范围为0.004至1.33 MP L - 1（平均= 0.31 ± 0.31 MP L - 1），与高收入国家的值相当。贫民窟和雨季的浓度分别为0.41±0.33 MPs/L和0.36±0.34 MPs/L。聚丙烯和聚乙烯是最常见的聚合物，粒径在25 ~ 125 μm之间。溶解的Ba、Zn、V、Cu和Fe的平均浓度分别为28.3±6.5、16.2±19.7、7.5±0.5、7.0±2.6和5.1±3.7 µg/L，是唯一检测到的微量金属，在不同地点或季节没有显着变化，仍低于世界卫生组织和国家饮用水指南。微量金属的估计每日摄入量（EDI）和危害指数（HI）值表明最低的非致癌风险。微塑料与微量金属浓度之间无显著相关性。总体而言，饮用水污染水平与高收入国家报告的水平相当。

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引用次数: 0

Waste microalgal biomass-derived biochar electrode for sustainable high-performance supercapacitors: Experimental and computational insights 用于可持续高性能超级电容器的废弃微藻生物质衍生生物炭电极：实验和计算见解

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

Environmental Technology & Innovation

Pub Date : 2025-12-05 DOI: 10.1016/j.eti.2025.104681

Zeyad M. Abdulhamid , Yazan Abuhasheesh , Mohamed E. Daoud , Mahendra Kumar , Dalaver H. Anjum , Pau Loke Show , Shadi W. Hasan

Agricultural and algal biomass residues are emerging as promising low-cost feedstocks for energy storage electrodes. In this work, waste Dunaliella salina microalgal biomass was converted into biochar through pyrolysis and directly deposited onto nickel foam to fabricate a binder-free electrode. The biochar electrode exhibited a high specific capacitance of 507.9 F/g and maintained 104 % retention after 2000 continuous cycles, highlighting excellent electrochemical reversibility in alkaline electrolyte. Complementary density functional theory (DFT) simulations using a nitrogen/oxygen co-doped graphene supercell revealed a strong potassium adsorption energy, partial charge transfer to heteroatom-rich sites, and band structure modifications, including gap opening (0.1861 eV), all indicating enhanced ion affinity and transport. These theoretical findings complement the experimental results, providing a fundamental understanding of the role of heteroatom doping in optimizing electrochemical performance. This work presents a sustainable pathway for developing high-performance electrode materials using microalgal biomass wastes.

农业和藻类生物质残渣正成为储能电极的有前途的低成本原料。本研究将盐渍杜氏藻的废微藻生物质通过热解转化为生物炭，并直接沉积在泡沫镍上制备无粘结剂电极。生物炭电极具有507.9 F/g的高比电容，在连续循环2000次后保持104 %的保留率，在碱性电解质中表现出优异的电化学可逆性。利用氮/氧共掺杂的石墨烯超级单体进行的互补密度泛谱理论（DFT）模拟显示，石墨烯超级单体具有很强的钾吸附能，部分电荷转移到富含杂原子的位点，能带结构发生改变，包括间隙打开（0.1861 eV），这些都表明离子亲和力和输运增强。这些理论发现补充了实验结果，为杂原子掺杂在优化电化学性能中的作用提供了基本的认识。这项工作提出了利用微藻生物质废物开发高性能电极材料的可持续途径。

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引用次数: 0

A comprehensive review of agricultural waste activated carbon as anodes for lithium-ion batteries 农业废弃物活性炭作为锂离子电池阳极的研究综述

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

Environmental Technology & Innovation

Pub Date : 2025-12-05 DOI: 10.1016/j.eti.2025.104662

Andrew N. Misiani, Babalola Aisosa Oni, Olusegun Stanley Tomomewo

This article presents current advances in biomass carbon electrode (CE) synthesis using bio-waste for energy storage (batteries/supercapacitors). The use of biomass residues as the main starting material for the synthesis of CEs has been growing since biomass residues are a renewable resource with relatively low processing costs, which is suitable for an economically and technically sustainable process. This paper discusses the use of diverse biomasses in the synthesis of CEs using various pyrolysis methods and experimental settings and identifies the potential impacts on their properties. It examines the feasibility of using activated carbon (AC) produced from agricultural waste as a high-performance and environmentally friendly anode material for lithium-ion batteries. A comprehensive analysis of the varied biomass types used in the production of CEs with very effective electrochemical characteristics for batteries/supercapacitors were presented. Batteries are electrochemical energy storage devices that store energy through chemical reactions while Supercapacitors are electrical energy storage devices that store energy through electrostatic charge accumulation at the electrode–electrolyte interface, not by chemical reaction. This study provides a thorough grasp of recent advances, challenges and goals of biomass residues as AC anode material in energy storage systems.

本文介绍了利用生物废弃物合成生物质碳电极用于储能（电池/超级电容器）的研究进展。由于生物质残渣是一种加工成本相对较低的可再生资源，适合于经济上和技术上可持续的工艺，因此利用生物质残渣作为合成ce的主要起始材料一直在增长。本文讨论了不同生物质在不同热解方法和实验环境下合成ce中的应用，并确定了对其性能的潜在影响。它研究了使用从农业废弃物中产生的活性炭（AC）作为锂离子电池高性能和环保阳极材料的可行性。全面分析了用于生产具有非常有效的电化学特性的电池/超级电容器的ce的各种生物质类型。电池是通过化学反应储存能量的电化学储能装置，而超级电容器是通过在电极-电解质界面积聚静电电荷而不是通过化学反应储存能量的电能存储装置。本研究对生物质残渣作为储能系统交流阳极材料的最新进展、挑战和目标进行了全面的掌握。

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引用次数: 0

Direct nanofiltration treatment using flat-sheet membrane modules reconfigured from spiral-wound elements 直接纳滤处理使用由螺旋缠绕元件重新配置的平板膜模块

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

Environmental Technology & Innovation

Pub Date : 2025-12-04 DOI: 10.1016/j.eti.2025.104678

Sandrine Boivin , Tetsuro Ueyama , Norika Tanaka , Tatsumi Shimono , Naoki Ohkuma , Kyoungsoo Park , Takahiro Fujioka

Direct nanofiltration (NF) treatment without pretreatment has attracted attention for achieving low-energy advanced drinking water treatment in drinking water applications. However, the validity of submerged NF systems for large-scale modules and variable feed water quality remains unexplored. This study aimed to assess the viability of pump-operated and gravity-driven membrane (GDM) filtration of lake water without pretreatment using NF membrane modules reconfigured from commercially available NF membrane elements typically suited for pressurized operation. The permeate flux of the pump-operated NF system gradually declined from 2.3 to 1.2 L/m²h at a feed temperature of 7–11°C until 12 d; thereafter, the permeate flux remained stable until 36 d. Cleaning the membrane surface by sponge wiping achieved near-full recovery of the permeance. The removal of dissolved organic matter and conductivity were relatively low, at 30–50 % and 10–30 % respectively. The specific energy consumption (SEC) of the pump-operated NF system could be as low as 116 Wh/m³, based on the pilot-scale tests. In contrast, the permeate flux of GDM filtration using the reconfigured NF membrane modules remained constant at approximately 0.28–0.37 L/m²h at a feed temperature of 5–22°C for over 78 d despite the limited water head available. The separation performance of GDM filtration was comparable to that of the pump-operated NF system, while the removal of conductivity (ions) was negligible. Despite the limitations of permeance and separation performance, both pump-operated and gravity-driven systems with reconfigured NF membrane modules have the potential to achieve low-energy and decentralized water supply systems.

不经预处理的直接纳滤处理已成为实现低能耗高级饮用水处理的热点。然而，淹没式纳滤系统对于大型模块和可变给水水质的有效性仍未得到探索。本研究旨在评估泵操作和重力驱动膜（GDM）过滤湖水的可行性，而不需要预处理，使用的是由市售的通常适用于加压操作的纳滤膜元件重新配置的纳滤膜模块。在进料温度为7 ~ 11℃时，泵控NF系统的渗透通量从2.3逐渐下降到1.2 L/m2h，直至12 d；此后，渗透通量保持稳定，直至36 d。通过海绵擦拭清洁膜表面，几乎完全恢复了渗透通量。溶解有机物的去除率和电导率相对较低，分别为30-50 %和10-30 %。根据中试结果，泵控NF系统的比能耗（SEC）可低至116 Wh/m3。相比之下，在进料温度为5-22°C的情况下，尽管可用水头有限，但使用重新配置的NF膜组件的GDM过滤的渗透通量仍保持在约0.28-0.37 L/m2h，持续78 d以上。GDM过滤的分离性能与泵操作的NF系统相当，而电导率（离子）的去除可以忽略不计。尽管存在渗透性能和分离性能的限制，但泵操作系统和重力驱动系统都具有重新配置NF膜模块的潜力，可以实现低能耗和分散式供水系统。

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引用次数: 0

Revealing controlled release mechanism of starch-based polyurethane coated urea: A kinetics insight 揭示淀粉基聚氨酯包覆尿素的控释机制：动力学洞察

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

Environmental Technology & Innovation

Pub Date : 2025-12-04 DOI: 10.1016/j.eti.2025.104679

Minhui Pang , Zirui Liu , Hongyan Li , Xuan Guo , Lixia Li

Bio-based coated fertilizers are promising alternatives to conventional chemical fertilizers due to their excellent performances. Identifying key influencing factors and deciphering controlled release mechanism are essential for their development. Kinetic modeling is a powerful tool for elucidating the complex mechanism governing nutrient release. However, a significant technical bottleneck lies in the gap between idealized laboratory evaluations and practical field performance. Herein, controlled release mechanism of starch-based polyurethane coated urea (BPCU), was elucidated based on the synergistic effect of coating materials and environmental factors. Nutrient release behaviors of BPCU were investigated under different temperatures and soil moisture contents. Structural changes of BPCU coating at various release stages were analyzed by using techniques such as SEM in detail, and release kinetics were evaluated using four classical models. It was found that temperature was the key factor affecting its nutrient release, and higher temperature favored the swelling rate resulting in a rapid nutrient release and the shortening release longevity. SEM and CT results indicated that the expansion of the bio-based coating in water increased the volume and number of micropores. Furthermore, the BPCU release process exhibited two kinetic patterns, namely, polymer swelling and relaxation conforming to non-Fickian diffusion in the first half and non-swelling diffusion belonging to Fickian diffusion in the second half. A release kinetics prediction model was proposed, with an average relative error of 14.5 %. This study narrows the gap between laboratory evaluation and practical field application, providing support for the development of bio-based coated fertilizers.

生物基包膜肥料具有优良的性能，是传统化学肥料的理想替代品。确定其关键影响因素，破解其控释机制是其发展的关键。动力学建模是阐明控制养分释放的复杂机制的有力工具。然而，一个重要的技术瓶颈在于理想的实验室评估和实际的现场性能之间的差距。本文基于涂层材料与环境因素的协同作用，对淀粉基聚氨酯包覆尿素（BPCU）的控释机理进行了研究。研究了不同温度和土壤含水量条件下BPCU的养分释放行为。利用扫描电镜等技术详细分析了BPCU涂层在不同释放阶段的结构变化，并利用四种经典模型对其释放动力学进行了评价。结果表明，温度是影响其养分释放的关键因素，温度越高，溶胀率越高，养分释放速度越快，释放寿命越短。SEM和CT结果表明，生物基涂层在水中的膨胀增加了微孔的体积和数量。BPCU的释放过程表现出两种动力学模式，即聚合物在前半部分属于非菲克扩散的溶胀松弛和在后半部分属于菲克扩散的非溶胀扩散。建立了释放动力学预测模型，平均相对误差为14.5 %。该研究缩小了实验室评价与实际应用之间的差距，为生物基包膜肥料的开发提供了支持。

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引用次数: 0

Mechanism of aggravated cardiotoxicity induced by demethylated metabolites of chiral citalopram in zebrafish (Danio rerio) 手性西酞普兰去甲基化代谢物对斑马鱼心脏毒性加重的机制

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

Environmental Technology & Innovation

Pub Date : 2025-12-04 DOI: 10.1016/j.eti.2025.104680

Laiyun Zhang , Liyan Teng , Liudong Xu , Feng Cui , Tingting Chai

Citalopram is a widely prescribed selective serotonin reuptake inhibitor used in the treatment of depression and anxiety disorders. Citalopram and its demethylated metabolites have been frequently detected with enantiomer-specific in aquatic environments. The characteristics of chirality and demethylation make citalopram-induced cardiotoxicity more complex. In this study, we carried out an 11-day exposure experiment at an environmentally relevant concentration (500 ng/L), using racemic and individual enantiomers of citalopram, desmethyl-citalopram, and didemethyl-citalopram to assess the differential cardiotoxicity in zebrafish embryo-larvae. Racemic exposure experiments showed that S-enantiomers of citalopram, desmethyl-citalopram, and didemethyl-citalopram were preferentially accumulated over R-enantiomers. S-enantiomer exposure demonstrated that the demethylation behavior occurred, and its demethylated metabolites accumulated. This biotransformation could result from an abnormality of cytochrome P450 gene expression. The demethylated citalopram induced cardiac malformations more severe than those induced by the parent compound in developmental zebrafish, especially induced by S-enantiomers. Dissection of cardiac tissues revealed that S-didemethyl-citalopram exposure induced the worst increase in heartbeats and impaired ejection fraction in developmental zebrafish, which might be mediated by calcium dysregulation and dysfunction of myocardial contractility. Our findings could offer a comprehensive perspective on citalopram-induced cardiotoxicity in non-target aquatic organisms and highlight the importance of metabolic transformation and chirality of environmental pollutants in ecosystem risk assessments.

西酞普兰是一种广泛使用的选择性血清素再摄取抑制剂，用于治疗抑郁症和焦虑症。西酞普兰及其去甲基代谢物在水生环境中经常检测到对映体特异性。手性和去甲基化的特点使得西酞普兰引起的心脏毒性更加复杂。在这项研究中，我们在环境相关浓度（500 ng/L）下进行了为期11天的暴露实验，使用西酞普兰、去甲基西酞普兰和二甲基西酞普兰的外消旋体和单个对映体来评估斑马鱼胚胎-幼虫的不同心脏毒性。外消旋暴露实验表明，西酞普兰、去甲基西酞普兰和二甲基西酞普兰的s -对映体优先于r -对映体积累。s -对映体暴露表明发生了去甲基化行为，其去甲基化代谢物积累。这种生物转化可能是由细胞色素P450基因表达异常引起的。在发育中的斑马鱼中，去甲基西酞普兰引起的心脏畸形比母体化合物更严重，特别是s -对映体引起的心脏畸形。心脏组织解剖显示，s -二甲基西酞普兰暴露对发育中的斑马鱼的心跳增加和射血分数的损害最为严重，这可能是由钙调节失调和心肌收缩功能障碍介导的。我们的研究结果可以为西酞普兰对非靶水生生物的心脏毒性提供一个全面的视角，并强调环境污染物的代谢转化和手性在生态系统风险评估中的重要性。

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引用次数: 0

Sustainable approach to cobalt recycling: Levulinic acid leaching of waste lithium-ion battery cathode materials 钴回收的可持续方法：废锂离子电池正极材料的乙酰丙酸浸出

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

Environmental Technology & Innovation

Pub Date : 2025-12-03 DOI: 10.1016/j.eti.2025.104675

Himanshu Gupta , Soniya Dhiman , Pascal G. Stam , Savi Chaudhary , Ramaswamy Murugavel , N. Raveendran Shiju

The global consumption of lithium-ion batteries (LIBs) has increased significantly due to the widespread application of electronic devices and electric vehicles. These batteries contain valuable metals, among which cobalt is a critical component. As a strategic material, it is desirable to recover cobalt from spent LIBs, thereby reducing reliance on primary resources. This study presents a sustainable recycling method that utilizes levulinic acid, a biomass-derived organic acid, in combination with hydrogen peroxide for the recovery of cobalt, with analysis conducted via UV-Visible spectrophotometry. The process specifically targets cobalt recovery from the cathode material of waste LIBs sourced from mobile phones. Key experimental parameters including acid concentration, solid-to-liquid (S/L) ratio, reaction time and temperature were systematically optimized. Under optimal conditions of S/L ratio of 1:50 and 80 °C, over 92 % of the cobalt was successfully leached. Complete cobalt leaching was observed at an S/L ratio of 1:500, demonstrating the high leaching capability of the system. The results demonstrate that levulinic acid is both an efficient and environmentally benign leaching agent for critical metal recovery. This approach aligns with circular economy principles by utilizing a renewable, waste-derived leachant and offers a promising green pathway for LIB recycling.

由于电子设备和电动汽车的广泛应用，全球锂离子电池（LIBs）的消费量大幅增加。这些电池含有贵重金属，其中钴是一种关键成分。作为一种战略材料，从废lib中回收钴是可取的，从而减少对初级资源的依赖。本研究提出了一种可持续回收方法，利用乙酰丙酸（一种生物质衍生的有机酸）与过氧化氢结合回收钴，并通过紫外可见分光光度法进行分析。该工艺专门针对从手机废旧锂电池的正极材料中回收钴。对酸浓度、固液比、反应时间、温度等关键实验参数进行了系统优化。在S/L比为1:50、80℃的最佳条件下，钴的浸出率可达92% %以上。在S/L比为1:500时，观察到钴完全浸出，表明该系统具有较高的浸出能力。结果表明，乙酰丙酸是一种高效、环保的关键金属回收浸出剂。这种方法符合循环经济原则，利用可再生的废物衍生浸出液，为LIB回收提供了一条有前途的绿色途径。

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引用次数: 0

Assessment of the tritium analysis performance of a nonylphenol-ethoxylate-free liquid scintillator by interlaboratory comparison 无壬基酚-乙氧基酸液体闪烁体氚分析性能的实验室间比较评价

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

Environmental Technology & Innovation

Pub Date : 2025-12-02 DOI: 10.1016/j.eti.2025.104666

Marielle Crozet , Véronique Labed , Céline Augeray , Audrey Bacchetta , Lionel Bec-Espitalier , Nicolas Baglan , Eric Bohaud , Giacomo Canciani , Sabine Charbouillot , Christèle Colin , Coryse Combes , Théo Cordara , Benoît Daniel , Nicolas Debain , Natacha Einaudi , Sandrine Fleury , Kevin Galliez , Claire Gégout , Héloïse Gervot , Aurélie Gollion , Cédric Rivier

With a view to using liquid scintillators compliant with the REACH (Registration, Evaluation, Authorisation and Restriction of Chemicals) regulations, some laboratories have expressed an interest in testing the ProSafe LT+ , a liquid scintillator without nonylphenol-ethoxylates (NPE). In order to evaluate the impact of using this new liquid on the analysis results, the CETAMA consortium organised two interlaboratory comparisons. Two ranges of tritium activity were selected to meet the needs of environmental and waste monitoring. 23 laboratories took part in these exercises, comparing results obtained with Prosafe LT+ to those obtained with NPE-containing liquid scinitllators. From the results it was seen that the background and the background noise obtained with the nonylphenol-ethoxylates-free liquid scintillator are not significantly different from that of the usual liquid scintillator, whether for the waste or environmental domain, over short (15 min) or long (200 min) counting times. Furthermore, the decision threshold and the detection limit values estimated with ProSafe LT+ were no different from those of usual scintillators. However, for the measurement of samples, and particularly for samples with a tritium activity above 15 Bq/kg, the ProSafe LT+ presented a reduced measurement quality compared to the nonylphenol-ethoxylates-containing LS i.e. the measurement uncertainty obtained with ProSafe LT+ is systematically higher. In light of the results obtained through this study, the authors recommend the use of the ProSafe LT+ with the proviso that the deterioration in measurement uncertainty be taken into account and found to be compatible with a laboratory’s individual needs.

为了使用符合REACH（化学品注册、评估、授权和限制）法规的液体闪烁体，一些实验室表示有兴趣测试ProSafe LT+ ，这是一种不含壬基苯酚-乙氧基醚（NPE）的液体闪烁体。为了评估使用这种新液体对分析结果的影响，CETAMA联盟组织了两次实验室间比较。为了满足环境和废物监测的需要，选择了两个氚活度范围。23个实验室参加了这些演习，比较了使用Prosafe LT+ 获得的结果与使用含有npe的液体闪烁器获得的结果。结果表明，在短计数时间（15 min）和长计数时间（200 min）内，无壬基酚-乙氧基酸酯液体闪烁体的背景和背景噪声与普通液体闪烁体的背景和背景噪声没有显著差异，无论是在废物领域还是在环境领域。此外，ProSafe LT+ 估计的判断阈值和检测极限值与通常的闪烁体没有什么不同。然而，对于样品的测量，特别是对于氚活性高于15 Bq/kg的样品，与含有壬基酚-乙氧基酸盐的LS相比，ProSafe LT+ 的测量质量降低，即使用ProSafe LT+ 获得的测量不确定度更高。鉴于通过这项研究获得的结果，作者建议使用ProSafe LT+ ，附带条件是要考虑到测量不确定度的恶化，并发现与实验室的个人需求相兼容。

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引用次数: 0

Impact of turning frequency on the transformation and bioavailability of nutrient elements and heavy metals in large-scale sheep manure composting on the Qinghai–Tibet Plateau

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

Environmental Technology & Innovation

Pub Date : 2025-12-02 DOI: 10.1016/j.eti.2025.104677

Rui Cai , Rongrong Li , Qingqing Zhou

A comprehensive understanding of the transformation mechanisms of nutrient elements and heavy metals, as well as their bioavailability during composting, is critical to ensuring the safety of compost products and improving their nutritional quality. This study explored the transformation mechanisms of heavy metals, nitrogen, and phosphorus forms in industrial-scale composting of sheep manure on Qinghai-Tibet Plateau (QTP) under three turning frequencies: once every two days (T1), four days (T2), and six days (T3). Results showed that T1 increased the maximum composting temperature by 6.6 °C compared to T3 and increased the humification index by 15.1 %, respectively. T1 increased the contents of available nitrogen and labile phosphorus by 12.1 % and 12.8 %, respectively, enhancing nitrogen and phosphorus availability for plant seedlings. T1 significantly decreased the proportions of exchangeable Pb, Cr, and Mn in the compost products by 13.7 %, 11.8 %, and 17.1 %, respectively (P < 0.05), while significantly increasing the proportions of residual Mn, Cu, Pb, and Cr, thereby reducing plant uptake of these heavy metals. More frequent turning suppressed denitrification while enhancing nitrite ammonification. This contributes to reduced nitrogen loss and enhanced nitrogen availability. Additionally, more frequent turning enhanced organic P mineralization, inorganic P solubilization, and polyphosphate degradation, thereby improving phosphorus bioavailability. Moreover, more frequent turning can influence heavy metal forms by modulating maturity, moisture content, and bacterial communities. These findings provide scientific support for the effective resource utilization of livestock waste on QTP.

全面了解堆肥过程中养分元素和重金属的转化机制及其生物利用度，对保证堆肥产品的安全性和提高堆肥产品的营养品质至关重要。结果表明：与T3相比，T1处理可使最高堆肥温度提高6.6℃，腐殖质化指数提高15.1 %；T1处理使植株速效氮和活性磷含量分别提高了12.1% %和12.8% %，提高了植株幼苗氮素和磷的有效性。T1显著降低了堆肥产物中可交换性Pb、Cr和Mn的比例，分别降低了13.7 %、11.8 %和17.1 % (P <； 0.05)，而显著增加了残留Mn、Cu、Pb和Cr的比例，从而降低了植物对这些重金属的吸收。频繁的转向抑制了反硝化作用，同时增强了亚硝酸盐的氨化作用。这有助于减少氮的损失和提高氮的可用性。此外，更频繁的转向增强了有机磷的矿化、无机磷的增溶和多磷酸盐的降解，从而提高了磷的生物利用度。此外，更频繁的翻转可以通过调节成熟度、水分含量和细菌群落来影响重金属的形态。研究结果为QTP上畜禽废弃物的有效资源化利用提供了科学依据。

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引用次数: 0