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Cyanide and chloroform detection through J-aggregates based aggregation induced emission probe with real sample applications 基于聚合诱导发射探针的氰化物和氯仿检测与实际样品应用
IF 6.6 Q1 ENGINEERING, ENVIRONMENTAL Pub Date : 2024-10-20 DOI: 10.1016/j.hazl.2024.100132
Isopthalamide based probe DPI has been synthesized by an easy two-step substitution reaction. Unique fluorescence properties of probe DPI were exploited for sensing of CNˉ and chloroform. Various spectroscopic techniques such as NMR, LC-MS, SEM, DLS, UV-Vis. and fluorescence spectroscopy in combination with DFT studies were used to confirm efficient detection of CN‾ through a non-covalent interaction of cyanide with probe. Furthermore, probe showed fluorescence emission at 360 nm which shifted significantly to 415 nm upon addition of water exhibiting unique AIE characteristics and formation of desired J-aggregates. Mechanistically, CN‾ and chloroform were selectively detected through fluorescence quenching with 9 nM and 0.2 % v/v limit of detection (LOD), respectively. Photoinduced electron transfer (PET) was proven to be involved as a sensing mechanism. Moreover, DPI exhibited interesting solvatochromism properties. DPI was proven to be a highly sensitive probe which showed solid-state and vapor phase on-field detection of CN‾. Similar sensing behavior of DPI probe towards CN‾ was seen in food and water samples.
通过简单的两步取代反应,合成了基于间苯二甲酰胺的探针 DPI。探针 DPI 的独特荧光特性被用于传感 CNˉ 和氯仿。通过核磁共振、液相色谱-质谱、扫描电子显微镜、DLS、紫外可见光谱和荧光光谱等多种光谱技术,并结合 DFT 研究,证实了氰化物与探针的非共价作用可有效检测到 CN-‾。此外,探针在 360 纳米波长处发出荧光,当加入水后,荧光明显转移到 415 纳米波长处,显示出独特的 AIE 特性,并形成了所需的 J-聚集体。从机理上讲,通过荧光淬灭可选择性地检测到氯化萘和氯仿,检测限(LOD)分别为 9 nM 和 0.2 % v/v。光诱导电子转移(PET)被证明是一种传感机制。此外,DPI 还表现出有趣的溶解变色特性。事实证明,DPI 是一种高灵敏度的探针,可在固态和气相场上检测到 CN‾。在食品和水样品中,DPI探针也能对CN-‾产生类似的传感行为。
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引用次数: 0
Dissolved elemental mercury accumulation by freshwater phytoplankton species: A pilot study 淡水浮游植物物种的溶解元素汞积累:试点研究
IF 6.6 Q1 ENGINEERING, ENVIRONMENTAL Pub Date : 2024-10-05 DOI: 10.1016/j.hazl.2024.100128
Bioaccumulation of dissolved elemental mercury (DGM) by various organisms has been demonstrated, but no study has shown its uptake and sequestration by phytoplankton species. The present study aims to investigate the accumulation of mercury by phytoplankton species exposed to DGM. Diatoms (Cyclotella meneghiniana and Navicula pelliculosa) and green algae (Chlamydomonas reinhardtii and Haematococcus pluvialis) were exposed to constant high level of atmospheric gaseous Hg (∼7.7 µg m−3). Total mercury concentrations (THg) in the medium (dissolved fraction) and algae cells (cellular fraction) were determined using cold vapor atomic fluorescence spectroscopy. Results revealed a partitioning of Hg(0) between the atmosphere and phytoplankton cultures, with THg predominantly found in the algae cells. THg in the algae cultures decreased in the order: C. reinhardtii > H. pluvialis > N. pelliculosa > C. meneghiniana. However, the cellular concentration (mol cell−1) decreased in the order: H. pluvialis > C. reinhardtii > C. meneghiniana > N. pelliculosa. These results highlight species specificity in Hg accumulation upon exposure to DGM, further linked to the phytoplankton surface area. Our findings reveal for the first time that phytoplankton species significantly influence the partitioning of atmospheric Hg(0) in aquatic environments, with important implications for the understanding of the aquatic mercury cycle.
各种生物对溶解元素汞(DGM)的生物累积已得到证实,但还没有研究显示浮游植物物种对其的吸收和固存。本研究旨在调查暴露于 DGM 的浮游植物物种的汞积累情况。硅藻(Cyclotella meneghiniana 和 Navicula pelliculosa)和绿藻(Chlamydomonas reinhardtii 和 Haematococcus pluvialis)持续暴露于高浓度大气气态汞(∼7.7 µg m-3)中。采用冷蒸气原子荧光光谱法测定了培养基(溶解部分)和藻细胞(细胞部分)中的总汞浓度(THg)。结果显示,Hg(0) 在大气和浮游植物培养物之间分配,THg 主要存在于藻类细胞中。藻类培养物中的 THg 依次减少:C. reinhardtii > H. pluvialis > N. pelliculosa > C. meneghiniana。然而,细胞浓度(mol cell-1)依次下降:H. pluvialis > C. reinhardtii > C. meneghiniana > N. pelliculosa。这些结果突显了暴露于 DGM 后汞积累的物种特异性,并与浮游植物的表面积进一步相关。我们的研究结果首次揭示了浮游植物物种对水生环境中大气汞分配的重要影响,这对了解水生汞循环具有重要意义。
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引用次数: 0
Kinetic modeling and optimization of triclosan adsorption onto coconut shell activated carbon 椰壳活性炭对三氯生的吸附动力学建模与优化
IF 6.6 Q1 ENGINEERING, ENVIRONMENTAL Pub Date : 2024-10-05 DOI: 10.1016/j.hazl.2024.100131
This study investigates the efficacy of activated carbon derived from coconut shells for the removal of Triclosan (TCS) from aqueous solutions. Experimental results demonstrate the impressive efficiency of coconut shell-derived activated carbon in eliminating TCS from water. Statistical analysis underscores the significant role of agitation in enhancing adsorption efficiency, with increased agitation leading to higher contaminant removal rates. Equilibrium is rapidly achieved, with removal efficiencies exceeding 85 %. Kinetic analysis reveals rapid adsorption kinetics, predominantly following the pseudo-second-order model. Additionally, intraparticle diffusion analyses provide insights into TCS diffusion within activated carbon pores, highlighting its dependence on solute concentration. These findings underscore the potential of coconut shell-derived activated carbon as a viable solution for mitigating TCS contamination in water sources, contributing to the development of effective water treatment strategies.
本研究调查了椰壳衍生活性炭去除水溶液中三氯生(TCS)的功效。实验结果表明,椰壳衍生活性炭在去除水中的三氯生(TCS)方面具有令人印象深刻的功效。统计分析强调了搅拌在提高吸附效率方面的重要作用,增加搅拌可提高污染物去除率。很快就能达到平衡,去除率超过 85%。动力学分析表明,吸附动力学速度很快,主要遵循伪二阶模型。此外,颗粒内扩散分析深入揭示了三氯氢硅在活性炭孔隙内的扩散情况,突出了其对溶质浓度的依赖性。这些发现强调了椰壳衍生活性碳作为一种可行的解决方案来减轻水源中的 TCS 污染的潜力,有助于开发有效的水处理策略。
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引用次数: 0
First evidence of microplastic-associated extended-spectrum beta-lactamase (ESBL)-producing bacteria in the Red River Delta, Vietnam 越南红河三角洲与微塑料相关的产广谱β-内酰胺酶(ESBL)细菌的首次证据
IF 6.6 Q1 ENGINEERING, ENVIRONMENTAL Pub Date : 2024-10-02 DOI: 10.1016/j.hazl.2024.100129
This study investigated the relationship between MiPs, antibiotic resistance genes (ARGs), and water quality in the Red River Delta. MiPs were collected from water samples at four locations: Hanoi, Ha Nam, Nam Dinh, and Cat Ba Island. Bacteria isolated from MiPs and the surrounding water were analyzed for β-lactamase genes. Polyethylene terephthalate (PET) and polytridecanolactone (PTDL) exhibited notable correlations with coefficients with microbial abundance on MiPs. Aeromonas (99.2 % of all isolates) were the most common bacteria isolated from MiPs, with a fewer Escherichia coli (0.83 %). Of 207 bacterial strains isolated from microplastic, 23 (~11 % of total) were found to carry antibiotic resistance genes, mostly blaTEM (13/23; 56.5 %), blaSHV (9/23; 39.1 %) and blaCTXM-9 (1/23; 4.3 %). All seven environmental factors measured were found to affect the distribution of ARGs and ARBs on MiP surfaces. Chlorophyll-a showed a strong positive correlation with ARB abundance, suggesting a potential link between primary productivity and bacterial colonization. This study is one of the first to report the association of MPs with antibiotic-resistant microbiota and genes. The presence of ARGs on MiPs in areas with high human population highlights the need for effective pollution management strategies to mitigate the risks associated with AMR.
本研究调查了红河三角洲的 MiPs、抗生素耐药基因(ARGs)和水质之间的关系。从四个地点的水样中收集了米磷:河内、河南、南定和猫坝岛。对从 MiPs 及其周围水体中分离出的细菌进行了β-内酰胺酶基因分析。聚对苯二甲酸乙二醇酯(PET)和聚十三内酯(PTDL)与水稻秧苗上的微生物数量呈显著的相关系数。气单胞菌(占所有分离菌株的 99.2%)是最常见的从 MiPs 上分离的细菌,大肠杆菌较少(0.83%)。从微塑料中分离出的 207 株细菌中有 23 株(约占总数的 11%)携带抗生素耐药基因,主要是 blaTEM(13/23;56.5%)、blaSHV(9/23;39.1%)和 blaCTXM-9(1/23;4.3%)。所测量的七种环境因素都会影响MiP表面ARGs和ARBs的分布。叶绿素-a 与 ARB 丰度呈强正相关,表明初级生产力与细菌定殖之间存在潜在联系。这项研究是首批报道中微囊藻与抗生素微生物群和基因相关性的研究之一。在人烟稠密的地区,MiPs 上存在的 ARGs 突出表明,需要采取有效的污染管理策略来降低 AMR 带来的风险。
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引用次数: 0
The role of environmentally relevant concentrations of oxytetracycline in the emergence of antimicrobial resistance in Aeromonas hydrophila and Edwardsiella tarda 环境相关浓度的土霉素在嗜水气单胞菌和塔氏爱德华氏菌产生抗菌药耐药性中的作用
IF 6.6 Q1 ENGINEERING, ENVIRONMENTAL Pub Date : 2024-10-02 DOI: 10.1016/j.hazl.2024.100130
The study assessed the efficiency of in-vitro oxytetracycline (OTC) exposure on antimicrobial resistance (AMR) development in aquatic bacteria. Aeromonas hydrophila ATCC 49140 and Edwardsiella tarda ATCC 15947 were serially passaged to OTC for short and long durations. Short duration OTC exposure (30 min) at 0, 0.097 (0.25× Minimum Inhibitory Concentration: MIC), 0.195 (0.5× MIC) and 0.39 µg mL−1 (1× MIC) elicited high mutation rate in A. hydrophila (10−4) and E. tarda (10−2). Serial passage exposure to inhibitory concentration of OTC (0.39 µg mL−1) reduced the zone of inhibition of nitrofurantoin (NIT) for A. hydrophila and of tetracycline, NIT and gentamicin for E. tarda to a clinically significant level. The upsurge in MICs of OTC was 4-folds (1.56 µg mL−1) and 8-folds (3.12 µg mL−1) in A. hydrophila and E. tarda, respectively during serial passage exposure to 0.097, 0.195 and 0.39 µg mL−1 OTC. OTC exposure also increased the MICs of biocide triclosan (TCS) >4-folds (>100 µg mL−1) in A. hydrophila without any concentration-dependent pattern. This study shows that environmental OTC levels can drive bacterial mutation and AMR, potentially leading to cross-resistance to biocides like TCS. Reducing OTC use and improving disposal could help limit AMR spread through better antimicrobial management.
该研究评估了体外土霉素(OTC)暴露对水生细菌抗菌素耐药性(AMR)发展的影响。将嗜水气单胞菌 ATCC 49140 和 Edwardsiella tarda ATCC 15947 分序列置于 OTC 的短期和长期暴露中。在 0、0.097(0.25 倍最低抑菌浓度:MIC)、0.195(0.5 倍 MIC)和 0.39 µg mL-1(1 倍 MIC)的条件下,短时间接触 OTC(30 分钟)会引起嗜水气单胞菌(10-4)和 Edwardsiella tarda(10-2)的高突变率。连续暴露于抑制浓度的 OTC(0.39 微克/毫升-1)可将硝基呋喃妥因(NIT)对蚜虫的抑制区以及四环素、NIT 和庆大霉素对 E. tarda 的抑制区缩小到具有临床意义的水平。在连续接触 0.097、0.195 和 0.39 微克毫升-1 OTC 的过程中,蚜虫和 E. tarda 的 OTC MICs 分别上升了 4 倍(1.56 微克毫升-1)和 8 倍(3.12 微克毫升-1)。暴露于 OTC 还会使杀菌剂三氯生(TCS)在蛛水蚤中的中等有效浓度增加 4 倍(100 微克/毫升-1),但没有任何浓度依赖性模式。这项研究表明,环境中的 OTC 含量会导致细菌变异和 AMR,从而可能导致对 TCS 等杀菌剂产生交叉耐药性。减少 OTC 的使用并改进处置方法有助于通过更好的抗菌剂管理来限制 AMR 的传播。
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引用次数: 0
Perturbation of enzyme structure by nano-metal organic frameworks: A question mark on their safety-by-design? 纳米金属有机框架对酶结构的干扰:设计安全性的问号?
IF 6.6 Q1 ENGINEERING, ENVIRONMENTAL Pub Date : 2024-09-20 DOI: 10.1016/j.hazl.2024.100127
Our study investigates the interactions between nanoscale Metal-Organic Frameworks (nMOFs), specifically ZIF-8 and CuIm, and key enzymes: Acetylcholine Esterase (AChE), α-amylase. Using circular dichroism (CD) spectroscopy, we observed significant alterations in the secondary structures of these enzymes upon interaction with nMOFs. AChE showed a reduction in α-helix content from 20.1 % to a significantly lower value when exposed to 160 µg/mL of nMOFs, with a corresponding increase in β-sheet and other structural components. Enzymatic activity assays revealed that CuIm nMOFs decreased AChE activity by 67.08 % at the highest concentration tested (160 µg/mL). ZIF-8 also affected AChE activity significantly at this concentration. Similarly, α-amylase exhibited structural changes, with increasing concentrations of nMOFs leading to a near-total loss of secondary structure at 80 and 160 µg/mL. These structural changes were accompanied by a marked decrease in enzymatic activity, particularly with CuIm nMOFs showing the most substantial inhibitory effects. Our findings highlight the profound impact of nMOFs on enzyme structures and functions, emphasising the need for comprehensive assessments of nMOFs' potential toxicity and understanding the aspects of their safety-by-design.
我们的研究调查了纳米级金属有机框架(nMOFs),特别是 ZIF-8 和 CuIm,与关键酶之间的相互作用:乙酰胆碱酯酶(AChE)、α-淀粉酶。利用圆二色性(CD)光谱,我们观察到这些酶与 nMOFs 相互作用时二级结构发生了显著变化。当暴露于 160 µg/mL 的 nMOFs 时,AChE 的 α-螺旋含量从 20.1% 降至明显较低的值,而 β-片和其他结构成分则相应增加。酶活性测定显示,在测试的最高浓度(160 微克/毫升)下,CuIm nMOFs 可使 AChE 活性降低 67.08%。在此浓度下,ZIF-8 也会显著影响 AChE 的活性。同样,α-淀粉酶的结构也发生了变化,随着 nMOFs 浓度的增加,在 80 µg/mL 和 160 µg/mL 浓度下,二级结构几乎完全丧失。伴随这些结构变化的是酶活性的明显降低,尤其是 CuIm nMOF 的抑制作用最为显著。我们的研究结果突显了 nMOFs 对酶结构和功能的深远影响,强调了全面评估 nMOFs 潜在毒性和了解其设计安全性的必要性。
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引用次数: 0
Sustainable chromium ore processing residue (COPR) waste treatment with black soldier fly larvae (BSFL) 用黑兵蝇幼虫(BSFL)对铬矿加工残渣(COPR)废物进行可持续处理
IF 6.6 Q1 ENGINEERING, ENVIRONMENTAL Pub Date : 2024-09-19 DOI: 10.1016/j.hazl.2024.100126
Chromium elements are prevalent in daily life, and millions of tonnes of Chromium Ore Processing Residue (COPR) remain untreated in China, posing significant environmental risks. In search of a cost-effective and environmentally friendly treatment method, this study investigated the potential of black soldier fly larvae (BSFL) as a biological treatment for COPR. Experiments were conducted using BSFL to treat 100 % COPR and a mixture of 50 % COPR with 50 % wheat bran. Post-treatment analysis using ICP-MS, X-ray diffraction (XRD), and scanning electron microscopy revealed a significant reduction of approximately 43 % in COPR dry mass and a decrease in total hexavalent chromium content from 5636 ppm to 563 ppm. The optimal treatment conditions involved mixing 50 % COPR with 50 % wheat bran. The results suggest that BSFL can serve as a sustainable and economically viable biological treatment for hazardous waste such as COPR, offering potential benefits for both the environment and the economy. Further research is needed to explore the mechanisms and effects of BSFL on hazardous waste treatment.
铬元素在日常生活中普遍存在,而中国仍有数百万吨的铬矿加工残渣(COPR)未得到处理,对环境造成了严重危害。为了寻找一种经济、环保的处理方法,本研究调查了黑兵蝇幼虫(BSFL)作为 COPR 生物处理剂的潜力。实验中使用 BSFL 处理 100 % COPR 和 50 % COPR 与 50 % 麦麸的混合物。使用 ICP-MS、X 射线衍射 (XRD) 和扫描电子显微镜进行的处理后分析表明,COPR 干重显著减少了约 43%,总六价铬含量从 5636 ppm 降至 563 ppm。最佳处理条件是将 50% 的 COPR 与 50% 的麦麸混合。结果表明,BSFL 可以作为一种可持续的、经济上可行的生物处理方法来处理 COPR 等危险废物,为环境和经济带来潜在效益。需要进一步研究 BSFL 处理危险废物的机制和效果。
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引用次数: 0
Investigating the toxicological effects of nanomaterials in food packaging associated with human health and the environment 调查食品包装中的纳米材料对人类健康和环境的毒理学影响
IF 6.6 Q1 ENGINEERING, ENVIRONMENTAL Pub Date : 2024-09-12 DOI: 10.1016/j.hazl.2024.100125

Nanomaterials (NMs) have revolutionized food packaging by offering unique properties such as enhanced barrier functions, antimicrobial activity, and prolonged shelf life. However, concerns over the potential adverse effects of these materials on human health and the environment have prompted extensive research. This review explores the toxicological implications of NMs used in food packaging, focusing on their migration mechanisms, interactions with biological systems, and environmental impact. NMs, due to their small size and high surface area-to-volume ratio, can migrate from packaging materials into food under various conditions, potentially leading to human exposure through ingestion. Studies have highlighted the ability of certain NMs, such as silver nanoparticles (AgNPs), titanium dioxide nanoparticles (TiO2 NPs), and zinc oxide nanoparticles (ZnO NPs), to induce oxidative stress, inflammation, genotoxicity, and cellular dysfunction in vitro and in vivo. Furthermore, the environmental release of NMs during manufacturing, use, and disposal stages poses risks to ecosystems and human health. This review synthesizes current knowledge, identifies research gaps, and discusses regulatory challenges associated with the safe use of NMs in food packaging. Future research directions are proposed to enhance the understanding of NM toxicity, improve risk assessment methodologies, and develop sustainable packaging alternatives. By addressing these issues, stakeholders can effectively manage the risks while harnessing the benefits of nanotechnology in food packaging innovation.

纳米材料(NMs)具有增强阻隔功能、抗菌活性和延长保质期等独特性能,为食品包装带来了革命性的变化。然而,这些材料对人类健康和环境的潜在不利影响引起了人们的关注,并引发了广泛的研究。本综述探讨了食品包装中使用的 NMs 的毒理学影响,重点关注其迁移机制、与生物系统的相互作用以及对环境的影响。由于尺寸小、表面积与体积比高,核磁共振成像介质可在各种条件下从包装材料迁移到食品中,从而可能导致人体摄入。研究表明,某些 NMs(如纳米银粒子 (AgNPs)、纳米二氧化钛粒子 (TiO2 NPs) 和纳米氧化锌粒子 (ZnO NPs))能够在体外和体内诱发氧化应激、炎症、基因毒性和细胞功能障碍。此外,在制造、使用和处置阶段,环境中释放的 NMs 对生态系统和人类健康构成风险。本综述综述了当前的知识,确定了研究差距,并讨论了与在食品包装中安全使用 NMs 相关的监管挑战。提出了未来的研究方向,以加强对 NM 毒性的了解、改进风险评估方法并开发可持续的包装替代品。通过解决这些问题,利益相关者可以有效地管理风险,同时利用纳米技术在食品包装创新中的优势。
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引用次数: 0
Unraveling the competitive transport of metformin and erythromycin in saturated sandy soil: Experimental investigation, modeling insights and implications on SDGs 揭示二甲双胍和红霉素在饱和砂质土壤中的竞争性迁移:实验研究、建模见解及对可持续发展目标的影响
IF 6.6 Q1 ENGINEERING, ENVIRONMENTAL Pub Date : 2024-09-10 DOI: 10.1016/j.hazl.2024.100124

The presence of metformin (MTN) and erythromycin (ETM) in groundwater is a growing global concern due to their persistence and toxicity. This study addresses a critical gap in understanding the fate and transport of these pharmaceutical and personal care products in saturated sandy soil columns at environmentally relevant concentrations, an underexplored area. The results show that MTN, due to its high mobility, appeared earlier in the soil column with a recovery rate exceeding 90 % and an adsorption coefficient (Kd) of 1.063 Lkg−1. In contrast, ETM, with a higher Kd value of 5.426 Lkg−1, exhibited delayed breakthrough and recovery of less than 15 %, indicating stronger adsorption potential. Desorption studies indicated a greater risk of MTN leaching into groundwater, while ETM remained strongly adsorbed to soil particles. Despite the limited organic matter content in sandy soil, a significant amount of ETM was adsorbed, suggesting sands' high adsorption capacity and potential for natural remediation. This research fills a knowledge gap regarding the adsorption capacity of sandy soils at environmentally relevant concentrations, providing essential insights for environmental risk assessments and groundwater contamination mitigation strategies, directly supporting Sustainable Development Goals 3 (Health and Well-being), 6 (Clean Water and Sanitation), and 14 (Life Below Water).

由于二甲双胍(MTN)和红霉素(ETM)的持久性和毒性,它们在地下水中的存在日益受到全球关注。这项研究填补了在了解这些药物和个人护理产品在饱和砂质土柱中环境相关浓度下的归宿和迁移方面的一个重要空白,而这正是一个尚未充分开发的领域。结果表明,MTN 由于具有高流动性,较早出现在土壤柱中,回收率超过 90%,吸附系数 (Kd) 为 1.063 Lkg-1。相比之下,ETM 的 Kd 值较高,为 5.426 Lkg-1,它的突破时间较晚,回收率低于 15%,表明其吸附潜力较强。解吸研究表明,MTN 沥滤到地下水的风险更大,而 ETM 仍被土壤颗粒牢牢吸附。尽管砂质土壤中的有机物含量有限,但仍吸附了大量的 ETM,这表明砂土具有很高的吸附能力和自然修复的潜力。这项研究填补了沙质土壤在环境相关浓度下的吸附能力方面的知识空白,为环境风险评估和地下水污染缓解战略提供了重要见解,直接支持了可持续发展目标 3(健康与福祉)、目标 6(清洁水和卫生)和目标 14(水下生命)。
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引用次数: 0
Crosslinked polyetherimide based electrospun membrane: Effect of fibre morphology on hot oil sorption 基于交联聚醚酰亚胺的电纺丝膜:纤维形态对热油吸附的影响
IF 6.6 Q1 ENGINEERING, ENVIRONMENTAL Pub Date : 2024-09-06 DOI: 10.1016/j.hazl.2024.100123

Handling hot oil spillage, particularly from oil refineries, petrochemical industry and automobiles is challenging and there have been limited solutions to address the issue. Polyetherimide (PEI) electrospun fibrous membranes were developed in this study by leveraging PEI's high-temperature stability to serve as promising materials for hot oil sorption. The morphology of the membrane forming fibers varied from circular to dumbbell shaped, by judicious choice of solvents of varying boiling points, to study the effect of fiber morphology on oil sorption capacity. Crosslinking of PEI membranes was carried out using ethylenediamine (EDA) to impart structural integrity and resiliency to the membranes. The PEI membrane composed of dumbbell-shaped fibers demonstrated an oil-sorption capacity of 25.4 ±1.5 g/g for engine oil at 150°C within one hour, outperforming a commercial polypropylene (PP) nonwoven absorbent, which failed and collapsed under the same high-temperature conditions. Enhanced oil sorption in the dumbbell-shaped fibrous membrane was achieved due to its lower tortuosity, aligned inter-fiber channels, and higher capillary pressure. Usefulness and sorption capacity of PEI based electrospun membranes may further be explored for controlling the oil spillage through introduction of specific surface features and functionalization.

处理热油溢出,特别是炼油厂、石化工业和汽车溢出的热油具有挑战性,目前解决这一问题的方法还很有限。本研究利用聚醚酰亚胺(PEI)的高温稳定性开发了电纺丝纤维膜,将其作为热油吸附的理想材料。通过合理选择不同沸点的溶剂,使成膜纤维的形态从圆形到哑铃形不等,以研究纤维形态对吸油能力的影响。使用乙二胺(EDA)对 PEI 膜进行交联,以增强膜的结构完整性和弹性。由哑铃状纤维组成的 PEI 膜在 150°C 的温度下,一小时内对发动机油的吸油能力为 25.4 ±1.5 g/g,优于商用聚丙烯(PP)无纺布吸油剂,后者在相同的高温条件下会失效和塌陷。由于哑铃状纤维膜具有较低的迂回度、排列整齐的纤维间通道和较高的毛细管压力,因此增强了其对油的吸附能力。通过引入特定的表面特征和功能化,可进一步探索基于 PEI 的电纺丝膜在控制溢油方面的用途和吸附能力。
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引用次数: 0
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