Journal of contaminant hydrology最新文献_第4页

The nexus of microplastics, food and antimicrobial resistance in the context of aquatic environment: Interdisciplinary linkages of pathways

IF 3.5 3区环境科学与生态学 Q2 ENVIRONMENTAL SCIENCES

Journal of contaminant hydrology

Pub Date : 2025-02-01 DOI: 10.1016/j.jconhyd.2025.104512

Shiwangi Dogra , Manish Kumar , Jian Zang

The exponential rise in plastic production since the mid-20th century has led to the widespread existence of microplastics in various ecosystems, posing significant environmental and health concerns. Microplastics, defined as plastic particles smaller than 5 mm, have infiltrated diverse environments, including oceans, freshwater bodies, and even remote Arctic ice. Their ability to absorb toxic chemicals and serve as vectors for microbial colonization raises concerns about their impacts on aquatic organisms and human health. This review examines the pathways by which microplastics infiltrate the food chain, highlighting their presence in various food items consumed by humans. Furthermore, it explores the nexus between microplastics and antimicrobial resistance (AMR), elucidating how microorganisms inhabiting plastic surfaces facilitate the transmission of antibiotic resistance genes (ARGs). The review underscores the urgent need for interdisciplinary research integrating environmental science, microbiology, public health, and policy to address the multifaceted challenges posed by microplastics. Standardized protocols for sampling and analysis are essential to enable meaningful comparisons across research and regions. By collectively addressing these challenges, we can strive towards a more sustainable and resilient future for ecosystems and human societies.

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引用次数: 0

Concentration-discharge relations and transient metal loads reveal spatiotemporal variability in solute-generation mechanisms in a mine-affected watershed

IF 3.5 3区环境科学与生态学 Q2 ENVIRONMENTAL SCIENCES

Journal of contaminant hydrology

Pub Date : 2025-02-01 DOI: 10.1016/j.jconhyd.2025.104513

Connor P. Newman , Alexis Navarre-Sitchler , Robert L. Runkel , Rory Cowie

Concentration-discharge (CQ) relations are commonly used to understand geochemical and hydrologic controls on the generation of solutes in watersheds. Despite the widespread application of CQ relations, this technique has been infrequently applied to acid mine drainage (AMD) sites, but the CQ framework may allow mechanistic understanding of remedial outcomes such as impoundment of water within underground mines. Results of CQ analyses and changes in metal loads in an AMD affected watershed in Colorado, USA indicate that dissolved loads increased at many individual locations following water impoundment within mine workings. Although increased loads were observed at most individual locations, these increases were offset by a large decrease in loading from the largest mine. A loading analysis that included data from an instream monitoring location showed a statistically significant decrease in Fe and Zn after bulkhead emplacement, indicating a net positive effect of bulkheads. Streams generally displayed dilution CQ patterns whereas mines and springs showed either flushing or chemostatic patterns prior to bulkheading, which transitioned to chemostatic patterns following bulkheading, indicating a transition from dynamic to equilibrium geochemical processes. Saturation indices for sulfide and secondary minerals indicated that mines and springs were near equilibrium for phases including schwertmannite, fluorite, and gypsum. Saturation indices vary through time for mines suggesting progressive leaching of sulfide minerals as the mass of available minerals in the mine workings decreases. Together, these diverse analyses provide an integrated understanding of the variability in solute generating processes in this watershed and may inform remediation plans for similarly affected sites by indicating the nature of mineralogic controls on water quality.

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引用次数: 0

Assessing data variability in groundwater quality monitoring of contaminated sites through factor analysis and multiple linear regression models 利用因子分析和多元线性回归模型评估污染场地地下水水质监测数据的变异性。

IF 3.5 3区环境科学与生态学 Q2 ENVIRONMENTAL SCIENCES

Journal of contaminant hydrology

Pub Date : 2025-02-01 DOI: 10.1016/j.jconhyd.2024.104471

Davide Sartirana , Chiara Zanotti , Alice Palazzi , Ilaria Pietrini , Paola Frattini , Andrea Franzetti , Tullia Bonomi , Marco Rotiroti

Monitoring of long-term contaminant concentrations trends is essential to verify that attenuation processes are effectively occurring at a site. However, monitoring data are often affected by extreme variability which prevents the identification of clear concentration trends. The variability is higher in long-screened monitoring wells, which are currently used at many contaminated sites, although it has been known since the 1980s that monitoring data from long-screened wells can be biased. Understanding the factors that may influence the variability of monitoring data is pivotal. To this end, following hydrochemical conceptual modelling using a multi-method approach, the variability of hydrocarbon concentrations from fully screened monitoring wells was assessed over eleven years at a former oil refinery located in Northern Italy. The proposed methodology combined factor analysis with multiple linear regression models.

Results pointed out a higher variability in hydrocarbon concentrations at the plume fringe and a lower variability at the plume source and core. 44–46 % of the total variability in measured hydrocarbon concentrations is due to “intrinsic plume heterogeneity”, related to the three-dimensional structure of a contaminant plume, which becomes thinner at the edge, creating a vertical heterogeneity of redox conditions at the plume fringe. This variability, expressed as increasing concentrations of sulfate and decreasing concentrations of methane, represents a background variability that cannot be reduced by improving sampling procedures. The remaining 56–54 % of the total variability may be due to the non-standardization of some purging and sampling operations, such as pump intake position, purging and sampling time/flow rates and variations in the analytical methods. This finding suggests that monitoring improvements in fully screened wells by standardizing all purging/sampling operations or using sampling techniques that can reduce the actual screen length (e.g., packers or separation/dual pumping techniques) would reduce data variability by more than half.

监测污染物浓度的长期趋势是必要的，以核实衰减过程有效地发生在一个地点。然而，监测数据经常受到极端变异性的影响，从而无法确定明确的浓度趋势。尽管自20世纪80年代以来人们就知道，长筛监测井的监测数据可能存在偏差，但目前在许多污染地点使用的长筛监测井的可变性更高。了解可能影响监测数据可变性的因素至关重要。为此，在采用多方法的水化学概念建模之后，在意大利北部的一家前炼油厂，对经过全面筛选的监测井进行了长达11年的碳氢化合物浓度变化评估。该方法将因子分析与多元线性回归模型相结合。结果表明，地幔柱边缘的烃浓度变异性较大，而地幔柱源和岩心的变异性较小。测量到的碳氢化合物浓度的总变异性中有44- 46%是由于“固有的羽流非均质性”，这与污染物羽流的三维结构有关，它在边缘变得更薄，在羽流边缘形成了氧化还原条件的垂直非均质性。这种变异性表现为硫酸盐浓度的增加和甲烷浓度的减少，代表了不能通过改进采样程序来降低的背景变异性。其余的56- 54%的可变性可能是由于某些净化和采样操作的非标准化，例如泵的吸入位置、净化和采样时间/流速以及分析方法的变化。这一发现表明，通过标准化所有清洗/采样操作或使用可以减少实际筛管长度的采样技术（例如封隔器或分离/双泵技术）来改善全筛井的监测，将使数据变动性降低一半以上。

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引用次数: 0

Release of poly- and perfluoroalkyl substances from AFFF-impacted soils: Effects of water saturation in vadose zone soils

IF 3.5 3区环境科学与生态学 Q2 ENVIRONMENTAL SCIENCES

Journal of contaminant hydrology

Pub Date : 2025-02-01 DOI: 10.1016/j.jconhyd.2025.104506

Stefanie M. Shea , Charles E. Schaefer , Tissa Illangasekare , Christopher P. Higgins

Soil samples collected from an aqueous film-forming foam (AFFF)-impacted sandy soil formation at two depth intervals above the water table were used in bench-scale column experiments to evaluate the release of poly- and perfluoroalkyl substances (PFASs) under different degrees of water saturation. Artificial rainwater was applied to the soils under constant and variably saturated conditions. Results from constant saturation experiments suggest that retention of PFAS mass at air-water interfaces was evident in the deep soil (f_oc < 0.00068 g/g), particularly for longer chain and zwitterionic compounds, while PFAS mass release from the shallow soil (f_oc = 0.0034 g/g) was consistent with kinetically controlled desorption from the soil. The release profiles for the perfluoroalkyl sulfonamides (FASAs) differed from other PFASs examined, with more FASAs generally being eluted under fully saturated conditions from both the shallow and deep soils. Importantly, variably saturated conditions resulted in more PFAS eluting from the soils: the average release rate of PFHxS from both soils was 10-fold higher under variably saturated conditions than under constant conditions. Both soils retained significant fractions of the total PFAS mass even after extensive flushing (51–83.8 % for PFOS). These results suggest that PFAS transport in vadose zone soils is influenced by air-water interfaces, but solid-phase desorption also plays a role. Overall, these results are consistent with observations in the field and serve to confirm key mechanisms that control PFAS leaching.

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引用次数: 0

Cellulose –Polyvinylalcohol supported magnetic nanocomposites from lentil husk for sequestration of cationic dyes from the aqueous solution: Kinetics, isotherm and reusability studies

IF 3.5 3区环境科学与生态学 Q2 ENVIRONMENTAL SCIENCES

Journal of contaminant hydrology

Pub Date : 2025-02-01 DOI: 10.1016/j.jconhyd.2025.104503

Afsana Khatoon , Shaziya Siddiqui , Nazrul Haq

The study emphasize on the synthesis of eco-friendly cellulose based magnetic nanocomposite derived from Lens cullnaris husk and Poly Vinyl Alcohol (Fe₃O₄@LENT/PVA) for the adsorption of Crystal Violet, Methylene Blue and Malachite Green Dye. The structural and functional morphology was determined by SEM-EDAX analysis and FTIR. The crystalline of Fe₃O₄@LENT/PVA was analyzed by XRD and pore size was determined by BET. The surface area of nanocellulose Fe₃O₄@LENT/PVA was found to be 22.308 m²/g and the pore volume of 0.074cm³/g. The Fe₃O₄@LENT/PVA nanocomposites show successful adsorption of CV, MB and MG in 120 min equilibrium time at pH 7 for CV and 8 for MB and MG respectively. The Fe₃O₄@LENT/PVA nanocomposites was best fitted Langmuir isotherm and follows pseudo 2nd order kinetics with intra particle as rate controlling mechanism. The nanocellulose Fe₃O₄@LENT/PVA composite shows good monolayer adsorption capacity in the order of CV(357 mg/g) > MB(112.35 mg/g) > MG(111.11 mg/g). Thermodynamic study reveals the process is endothermic and spontaneous in nature with ΔG⁰ value less than 20KJ mol⁻¹ at respective temperatures indicating Physiosorption. The nano-cellulose Fe₃O₄@LENT/PVA composite can be effectively desorb dyes by 0.1 M NaOH. The nanocellulose Fe₃O₄@LENT/PVA composite proves to be an effective adsorbent showing regeneration ability upto five times for all the dyes.

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引用次数: 0

Microplastics as adsorbent for Pb2+ and Cd2+: A comparative study of polypropylene, polyvinyl chloride, high-density polyethylene, and low-density polyethylene 微塑料作为 Pb2+ 和 Cd2+ 的吸附剂：聚丙烯、聚氯乙烯、高密度聚乙烯和低密度聚乙烯的比较研究。

IF 3.5 3区环境科学与生态学 Q2 ENVIRONMENTAL SCIENCES

Journal of contaminant hydrology

Pub Date : 2025-02-01 DOI: 10.1016/j.jconhyd.2024.104491

Tae-Jung Ha , Woo-Ri Lim , Junyong Heo , Minhee Lee , Minjune Yang

Microplastics (MPs) in aquatic environments adsorb heavy metals, thereby posing potential environmental risks. However, further research is needed to elucidate the adsorption behavior of different types of MPs for various heavy metals. The aim of this study was to characterize four types of MPs: polypropylene (PP), polyvinyl chloride (PVC), high-density polyethylene (HDPE), and low-density polyethylene (LDPE). Moreover, their Pb²⁺ and Cd²⁺ adsorption properties were determined to investigate the differences in their capacity to function as heavy metal adsorbents. MPs were characterized via scanning electron microscopy (SEM) using energy dispersive X-ray spectrometer (EDS), Brunauer–Emmett–Teller (BET) analysis, and Fourier transform infrared spectroscopy (FTIR). Adsorption experiment data were analyzed using the Langmuir and Freundlich isotherm models to evaluate the adsorption capacity of the MPs. Based on the results of the adsorption isotherm models and 2D-COS FTIR, the presence of oxygen-containing functional groups, including hydroxyl, carbonyl, and carboxyl groups influences the adsorption process of Pb²⁺ and Cd²⁺ onto PP and PVC, with the maximum adsorption capacities (Q_m) being 0.759 mg/g and 0.495 mg/g, respectively. Combination of the adsorption isotherm data and characteristics of MPs revealed that the following order of adsorption efficiencies of MPs for each heavy metal: PP > LDPE > PVC > HDPE for Pb²⁺ and PP > PVC > LDPE > HDPE for Cd²⁺. The results of this study suggest that MPs, particularly PP and PVC, may serve as vectors for heavy metal transport in aquatic environments, highlighting the need for further research to assess their environmental impact.

水生环境中的微塑料（MPs）吸附重金属，从而构成潜在的环境风险。然而，不同类型MPs对各种重金属的吸附行为还有待进一步研究。本研究的目的是表征四种类型的MPs：聚丙烯（PP），聚氯乙烯（PVC），高密度聚乙烯（HDPE）和低密度聚乙烯（LDPE）。此外，还测定了它们对Pb2+和Cd2+的吸附性能，以研究它们作为重金属吸附剂的能力差异。通过扫描电子显微镜（SEM）、x射线能谱仪（EDS）、布鲁诺尔-埃米特-泰勒（BET）分析和傅里叶变换红外光谱（FTIR）对MPs进行了表征。采用Langmuir和Freundlich等温线模型对吸附实验数据进行分析，评价MPs的吸附能力。吸附等温线模型和2D-COS FTIR结果表明，含氧官能团（羟基、羰基和羧基）的存在影响了Pb2+和Cd2+在PP和PVC上的吸附过程，最大吸附量（Qm）分别为0.759 mg/g和0.495 mg/g。结合吸附等温线数据和MPs的特性可知，MPs对各重金属的吸附效率顺序为：PP > LDPE > PVC > HDPE对Pb2+的吸附效率和PP > PVC > LDPE > HDPE对Cd2+的吸附效率。本研究结果表明，MPs，特别是PP和PVC，可能是水生环境中重金属运输的载体，强调需要进一步研究以评估其环境影响。

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引用次数: 0

Dynamic transformation and leaching processes of nitrogen in a karst agricultural soil under simulated rainfall conditions 模拟降雨条件下喀斯特农业土壤氮素动态转化及淋溶过程

IF 3.5 3区环境科学与生态学 Q2 ENVIRONMENTAL SCIENCES

Journal of contaminant hydrology

Pub Date : 2025-02-01 DOI: 10.1016/j.jconhyd.2024.104494

Ping Zhang , Fu-Jun Yue , Xiao-Dan Wang , Sai-Nan Chen

Frequent exchange of surface water and groundwater in karst agricultural areas results in soil nutrient loss during rainfall and consequent deterioration of the aquatic environment. To understand nitrogen (N) transformation and leaching processes from karst soil during rainfall events, two typical N fertilizers were added to karst soil and consequently investigated the nitrogenous species using soil column experiments system. The contents of various N forms in the soil and leachate were analyzed, and the net nitrification and the N leaching rates were calculated. The results revealed that NH₄⁺ and NO₂⁻ accumulation and variation occurred primarily in shallow soils, indicating that shallow soils were the primary sites for ammonification and nitrification processes. The net nitrification rate in the soil was higher with application of urea (12.5 mg N kg⁻¹d⁻¹) than with manure (2.4 mg N kg⁻¹d⁻¹). Peak N content indicated that it took only 7 days for N to migrate from the topsoil to 90 cm depth of soil after applying urea during successive intense rainfall events. NO₃⁻ leaching was predominantly composed of N, followed by DON, with leaching ratios of 31.1 % for the urea column and only 1.7 % for the manure column. These results highlight that the rapid nitrification of urea application coupled with intensive rainfall accelerated nitrate leaching into subterraneous streams in karst hydrological system, supporting a significant contribution from agricultural fertilizer loss during rainfall in karst area.

喀斯特农业区地表水与地下水频繁交换，导致降雨期间土壤养分流失，导致水环境恶化。为了解降雨过程中喀斯特土壤氮素的转化和淋溶过程，在喀斯特土壤中添加了两种典型氮肥，并利用土壤柱试验系统对氮素种类进行了研究。分析了土壤和渗滤液中各种形态氮的含量，计算了净硝化作用和氮淋滤速率。结果表明，NH4+和NO2-的积累和变化主要发生在浅层土壤，表明浅层土壤是氨化和硝化过程的主要场所。施用尿素（12.5 mg N kg-1d-1）的土壤净硝化速率高于施用有机肥（2.4 mg N kg-1d-1）。峰值氮含量表明，在连续强降雨条件下，施用尿素后，氮素从表层土壤向90 cm土壤深度的迁移仅需7 d。NO3-淋溶以N为主，其次是DON，尿素柱淋溶率为31.1%，粪肥柱淋溶率仅为1.7%。这些结果表明，尿素的快速硝化作用加上强降雨加速了岩溶水文系统中硝酸盐的地下淋滤，支持了降雨期间农业肥料损失的重要贡献。

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引用次数: 0

A mini review of recent advances in environmentally friendly microplastic removal technologies in water systems 水系统中环保型微塑料去除技术最新进展小结。

IF 3.5 3区环境科学与生态学 Q2 ENVIRONMENTAL SCIENCES

Journal of contaminant hydrology

Pub Date : 2025-02-01 DOI: 10.1016/j.jconhyd.2024.104485

Seung Hyeon Lee, Sang-Jun Han, Jung-Ho Wee

The current increase in microplastic (MP) occurrence worldwide is predicted to cause severe environmental crises in the future. Therefore, it is imperative to develop innovative MP removal technologies that can effectively mitigate MP emissions in any given scenario. This review discusses recent environmentally friendly advances in MP removal technologies that aim to overcome the limitations of current technologies, prevent secondary pollution, and utilize low energy. It also explores the potential applicability of these technologies under the current environmental conditions in South Korea. The core principles of these technologies, such as adsorption or flocculation, focus on minimizing the energy required to initiate and sustain these processes and on reducing the usage of adsorbents and flocculants. Employing microalgae as flocculants and triboelectricity for electrophoresis are identified as promising technologies. Incinerating MP-adsorbed materials from the process could be a viable disposal method, potentially serving as a source of heat energy. Consequently, technologies based on biochar or microalgae are especially advantageous in this context. The location where these technologies are applied plays a crucial role in their overall energy consumption. Ideally, implementation should occur as close as possible to points where MPs are found or within wastewater treatment plants. Froth flotation, microalgae flocculation, and triboelectricity-based electrophoresis are suitable methods in this regard. Establishing and enforcing administrative systems, laws, and policies globally to prevent MP occurrence remains critical. However, while these measures are vital, the most effective method for reducing MP occurrence is lowering plastic consumption alongside implementing stringent segregation and collection procedures.

目前全球微塑料（MP）的增加预计将在未来造成严重的环境危机。因此，开发能够在任何给定情况下有效减少MP排放的创新型MP去除技术势在必行。本文综述了近年来环境友好型MP去除技术的进展，旨在克服现有技术的局限性，防止二次污染，并利用低能耗。它还探讨了这些技术在韩国当前环境条件下的潜在适用性。这些技术的核心原则，如吸附或絮凝，侧重于最大限度地减少启动和维持这些过程所需的能量，并减少吸附剂和絮凝剂的使用。微藻絮凝剂和摩擦电电泳技术被认为是有发展前景的技术。焚烧过程中吸附mp的材料可能是一种可行的处理方法，可能作为热能的来源。因此，基于生物炭或微藻的技术在这方面特别有利。这些技术的应用地点在其整体能源消耗中起着至关重要的作用。理想情况下，实施应尽可能靠近发现MPs的地点或在废水处理厂内进行。泡沫浮选、微藻絮凝和摩擦电电泳是比较合适的方法。在全球范围内建立和执行行政系统、法律和政策以防止MP的发生仍然至关重要。然而，虽然这些措施至关重要，但减少塑料微粒发生的最有效方法是减少塑料消耗，同时实施严格的隔离和收集程序。

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引用次数: 0

First evidence of microplastics in the Quilca-Vítor-Chili river basin, Arequipa region, Peru 秘鲁阿雷基帕地区Quilca-Vítor-Chili河流域微塑料的第一个证据。

IF 3.5 3区环境科学与生态学 Q2 ENVIRONMENTAL SCIENCES

Journal of contaminant hydrology

Pub Date : 2025-02-01 DOI: 10.1016/j.jconhyd.2024.104484

Adriana E. Larrea Valdivia , Juan Reyes Larico , Carlos Valenzuela Huillca , Andrés H. Arias

The Chili, Vitor and Quilca rivers and their tributaries in Peru serve as a vital water resource for both irrigation and domestic use in the surrounding communities and agricultural areas. The purpose of this study was to establish, for the first time, the presence, abundance, distribution and chemical identity of polymer microparticles in aqueous samples from these river basins. The results showed that, on average, filaments were the most dominant (71.4 %), followed by fragments (17.2 %) and film (6.74 %). Identification of the polymer types revealed that the most abundant type of MPs is polyethylene (40.8 %), followed by polypropylene (23.8 %), synthetic fibres (15.8 %), and other synthetic polymers. All samples showed the occurrence of microplastics, with a mean concentration of 35.34 MPs/m³, a maximum value of 172.70 MPs/m³ and a minimum value of 3.59 MPs/m³. The results reported in this study establish a baseline for the study area for the first time; in addition, the areas were established with a Pollution Indicator, and the Pollutant Load Index (PLI) was calculated, which reinforced the proposed identification, alerting the need to control clandestine urban and rural landfills, as well as the indiscriminate use of PE big bags in the agricultural catchment.

秘鲁境内的奇利河、维托河和奎尔卡河及其支流为周围社区和农业区的灌溉和家庭用水提供了重要的水资源。本研究的目的是首次确定这些流域水样中聚合物微粒的存在、丰度、分布和化学特性。结果表明，平均以细丝（71.4%）居多，片段（17.2%）次之，薄膜（6.74%）居多。聚合物类型的鉴定表明，MPs最丰富的类型是聚乙烯（40.8%），其次是聚丙烯（23.8%），合成纤维（15.8%）和其他合成聚合物。所有样品均出现微塑料，平均浓度为35.34 MPs/m3，最大值为172.70 MPs/m3，最小值为3.59 MPs/m3。本研究报告的结果首次为研究区域建立了基线；此外，还建立了污染指标，并计算了污染物负荷指数（PLI），这加强了建议的识别，提醒人们需要控制秘密的城市和农村垃圾填埋场，以及在农业集水区任意使用PE大袋。

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引用次数: 0

The effect of sub-boiling temperatures on mass transfer from former manufactured gas plant residuals

IF 3.5 3区环境科学与生态学 Q2 ENVIRONMENTAL SCIENCES

Journal of contaminant hydrology

Pub Date : 2025-02-01 DOI: 10.1016/j.jconhyd.2025.104508

Yunxiao Wei , Kevin G. Mumford , Neil R. Thomson , Shupeng Li , Guanlin Guo , Tianxiang Xia , Peng Liu

The dissolution of polycyclic aromatic hydrocarbons (PAHs) from coal tar at former manufactured gas plant (FMGP) sites is a long-term threat to groundwater quality. The dissolution rate is often limited by an increase in the viscosity of the non-aqueous phase liquid (NAPL) as the lower molecular weight compounds are depleted over time, and this slow mass transfer prevents the effective application of remediation technologies that rely on NAPL-to-water mass transfer to remove or degrade mass. Increasing subsurface temperatures has the potential to increase mass transfer at FMGP sites by increasing PAH solubility and reducing NAPL viscosity. This study investigated the mass transfer of PAH compounds from a synthetic NAPL mixture and FMGP residual at 25, 50 and 80 °C using well-mixed batch experiments. Effective solubilities increased by up to an order of magnitude and mass transfer rate coefficients increased by up to a factor of 45. Enhancements were greater for higher molecular weight compounds, and for the more complex FMGP NAPL compared to the synthetic mixture due to a more substantial decrease in NAPL viscosity. Simulations using a screening-level model demonstrated the potential for sub-boiling temperature to increase NAPL mass removal at FMGP sites, with increases in concentration up to a factor of seven, and 6 to 87 % of mass remaining after heating to 80 °C for 120 days compared to 25 °C.

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引用次数: 0