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Evaluation of hydrocarbon and co-contaminants in groundwater and associated public health risks using electrical resistivity and hydrochemical data 利用电阻率和水化学数据评价地下水中的碳氢化合物和共污染物以及相关的公共健康风险
IF 7.5 3区 工程技术 Q1 WATER RESOURCES Pub Date : 2025-09-02 DOI: 10.1016/j.wri.2025.100319
Joseph Omeiza Alao , Bala Balarabe , Daniel A. Ayejoto , Fahad Abubakar , Oche J. Otorkpa , Stanley U. Eze
Hydrocarbon plays a vital role in national and global economic development. However, the environmental impact of hydrocarbon extraction and utilization remains a challenging phenomenon, which has recorded a far worse impact on the soil, groundwater, and public health. This study applied resistivity and hydrochemical data to provide information about the distribution of potential hydrocarbon contaminants (HCCs) and co-contaminants such as heavy metals (HMs) in groundwater near a refinery and the possible associated health risks for effective environmental management and public health protection. The concentrations of HCCs and variations in electrical resistivity values were examined. The regional aquifer vulnerability to the HCCS was evaluated. Based on the study's outcomes, HCCs occur in the overburdened topsoil at depths of 0.0 m–3.5 m, with electrical resistivity values varying between 15,000 Ωm and 60,000 Ωm. These values exceeded the known subsurface resistivity values of the region as a result of the presence of HCCs. Hydrochemical data records indicate high concentrations of HCCs in groundwater ranging from 0.342 mg/L – 0.572 mg/L. The level of total petroleum hydrocarbons (TPH) in groundwater from five hand-dug wells (HDWs): HDW 1 (0.4721), HDW 2 (0.4517), HDW 3 (highest at 0.5716), HDW 4 (0.4012), and HDW 5 (lowest at 0.3421), over the Directorate of Petroleum Resources (DPR). The aquifer of the region was polluted with HMs owing to infiltrated HCCs in different range, i.e., 0.792–1.692 mg/L for zinc, 0.909–1.711 for iron, 0.711–1.612 mg/L for lead, 0.333–0.717 mg/L for chromium, and 0.038–0.081 mg/L for cadmium, and pH ranged from 5.3 to 7.1 and electrical conductivity (EC) from 0.524 to 0.777 mS/cm, corresponding to the elevated electrical resistivity contrast caused by HCCs. Data analysis provides a comprehensive understanding of the environmental impacts of hydrocarbons and HMs, demonstrating how petrochemical industrial activities infiltrate into groundwater systems, exacerbating environmental degradation and posing serious health threats to human beings.
碳氢化合物在国家和全球经济发展中起着至关重要的作用。然而,碳氢化合物的开采和利用对环境的影响仍然是一个具有挑战性的现象,它对土壤、地下水和公众健康的影响要严重得多。本研究利用电阻率和水化学数据,提供炼油厂附近地下水中潜在碳氢化合物污染物(HCCs)和重金属(HMs)等共污染物的分布信息,以及可能存在的相关健康风险,以便进行有效的环境管理和公众健康保护。检测了HCCs的浓度和电阻率值的变化。评价了区域含水层对HCCS的脆弱性。根据研究结果,HCCs出现在深度为0.0 m - 3.5 m的超载表土中,其电阻率值在15,000 Ωm和60,000 Ωm之间变化。由于HCCs的存在,这些值超过了该地区已知的地下电阻率值。水化学数据记录表明,地下水中的HCCs浓度在0.342 mg/L - 0.572 mg/L之间。5口手挖井(HDW)的地下水总石油烃(TPH)水平:HDW 1(0.4721)、HDW 2(0.4517)、HDW 3(最高为0.5716)、HDW 4(0.4012)和HDW 5(最低为0.3421),高于石油资源管理局(DPR)。该地区含水层受到不同范围hcc的污染,锌为0.792 ~ 1.692 mg/L,铁为0.909 ~ 1.711 mg/L,铅为0.711 ~ 1.612 mg/L,铬为0.333 ~ 0.717 mg/L,镉为0.038 ~ 0.081 mg/L, pH值为5.3 ~ 7.1,电导率(EC)为0.524 ~ 0.777 mS/cm,与hcc引起的电阻率对比升高相对应。数据分析提供了对碳氢化合物和HMs的环境影响的全面了解,展示了石化工业活动如何渗入地下水系统,加剧了环境退化并对人类健康构成严重威胁。
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引用次数: 0
Influence of the synthesis route of lithium adsorbent Li/Al LDHs on physicochemical properties and extraction properties 锂吸附剂Li/Al LDHs合成路线对其理化性质及萃取性能的影响
IF 7.5 3区 工程技术 Q1 WATER RESOURCES Pub Date : 2025-08-26 DOI: 10.1016/j.wri.2025.100317
Maël Ferrand , Yves Barré , Alban Gossard , Guillaume Munier-Gondiant , Eric de Vito , Hussam Aldoori , Clio Bosia , Agnès Grandjean
Lithium can be extracted from brines using a process commonly called Direct Lithium Extraction (DLE) using a lithium selective adsorbent as solid support. For that purpose, Li/Al layered double hydroxide (Li/Al LDH) are efficient materials for trapping Li+ in the vacant octahedral sites and chloride ions in their interlayer space. This article presents two distinct synthesis routes of Li/Al LDH materials, hydrothermal and coprecipitation, their characterizations and their Li extraction properties in synthetic brine. Indeed, the synthesis route impacts the physicochemical properties of the adsorbent and hence the Li+ extraction performances. A link between the structural and morphological properties of the adsorbents and the extraction properties was established. The material obtained by the coprecipitation method appears more effective for extracting lithium, as it is made up of grains of small particles with a greater pore volume and a larger exchange surface. This morphological property leads directly to a fast extraction kinetics, which is an essential point for a viable DLE process. This article also shows a close link between the LiCl content in the materials and the maximum achievable extraction capacity. The two active materials studied here have in fact the same maximum capacities due to an identical LiCl content in their crystalline structure, meaning that all sorption sites can be reached under optimal extraction conditions. It is therefore crucial to understand the influence of synthesis method on the extraction performance to optimize the process.
锂可以通过一种通常称为直接锂萃取(DLE)的方法从盐水中提取,这种方法使用锂选择性吸附剂作为固体载体。为此,Li/Al层状双氧根(Li/Al LDH)是捕获空八面体位置上Li+和层间空间氯离子的有效材料。本文介绍了水热法和共沉淀法两种不同的Li/Al LDH材料合成路线及其表征和在合成盐水中的Li萃取性能。事实上,合成路线会影响吸附剂的物理化学性质,从而影响Li+的提取性能。建立了吸附剂的结构和形态特性与萃取性能之间的联系。通过共沉淀法获得的材料更有效地提取锂,因为它是由小颗粒颗粒组成的,具有更大的孔隙体积和更大的交换面。这种形态特性直接导致了快速的萃取动力学,这是可行的DLE工艺的关键。本文还显示了材料中LiCl含量与最大可实现萃取能力之间的密切联系。由于晶体结构中LiCl含量相同,本文研究的两种活性材料实际上具有相同的最大容量,这意味着在最佳提取条件下可以达到所有吸附位点。因此,了解合成方法对提取性能的影响对优化工艺至关重要。
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引用次数: 0
Concentrating esterquat-based surfactant wastewater via forward osmosis: A step toward reuse 正渗透浓缩酯基表面活性剂废水:迈向再利用的一步
IF 7.5 3区 工程技术 Q1 WATER RESOURCES Pub Date : 2025-08-15 DOI: 10.1016/j.wri.2025.100316
Aleksandra Klimonda, Izabela Kowalska
This study investigates the potential of forward osmosis (FO) for concentrating industrial wastewater obtained from the rinsing stage of esterquat-based cationic surfactant production. The raw wastewater exhibited a high chemical oxygen demand (COD) of approximately 20,000 mg O2/L and a significant concentration of cationic surfactants (CSs) from the esterquat group (∼2500 mg/L). The FO process with 1 M NaCl reduced wastewater volume by 50 %, resulting in a twofold increase in COD and CSs. An increase in the feed solution salinity (67–612 mg Cl/L) confirmed the occurrence of reverse salt flux, while total organic carbon (TOC) in the draw solution at the end of the process reached ∼200 mg/L, indicating partial organic contaminants transfer through the membrane. These results demonstrate that FO is effective for concentrating wastewater and supports circular economy strategies by enabling water reuse and reducing freshwater consumption.
本研究探讨了正向渗透(FO)对酯基阳离子表面活性剂生产过程中漂洗阶段产生的工业废水的浓缩潜力。原水的化学需氧量(COD)约为20,000 mg O2/L,酯基阳离子表面活性剂(CSs)浓度显著(~ 2500 mg/L)。添加1 M NaCl的FO处理可使废水体积减少50%,COD和CSs增加2倍。进料液盐度的增加(67-612 mg Cl−/L)证实了反向盐通量的存在,而工艺结束时提取液中的总有机碳(TOC)达到~ 200 mg/L,表明部分有机污染物通过膜转移。这些结果表明,FO可以有效地集中废水,并通过实现水再利用和减少淡水消耗来支持循环经济战略。
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引用次数: 0
Rainwater harvesting in a Polish industrial park: Toxicity, treatment, and use 波兰工业园区的雨水收集:毒性、处理和使用
IF 7.5 3区 工程技术 Q1 WATER RESOURCES Pub Date : 2025-08-08 DOI: 10.1016/j.wri.2025.100315
Martyna Grzegorzek , Szymon Szymczewski , Joanna Struk-Sokołowska , Bartosz Kaźmierczak
Rainwater quality is strongly influenced by industrial activity. Simultaneously, amid increasing water scarcity, it states a potential supplementary water resource. Therefore, monitoring its quality is essential. This is one of the first studies aiming to assess the quality of rainwater collected in an industrial area (in Lower Silesia, Poland), combined with an assessment of heavy metals (HMs) toxicity to evaluate its ecological risk. Rainwater samples were collected from five locations (drainage ditches and retention tanks). Selected physicochemical parameters (pH, electric conductivity, total suspended and dissolved solids, total phosphorus, BOD5, and COD), ions (Ca, Cl, SO42−, F, Al, nitrogen compounds), and selected HMs (Cu, Ni, Cr, Cd) were analyzed in a certified laboratory. Ecological risk was assessed using the risk quotient (RQ) method by comparing maximum observed concentrations with literature-derived predicted no-effect concentrations (PNEC). Most parameters met World Health Organization guidelines, except for Ni (up to 0.098 mg/L), and Cl- (up to 302 mg/L), suggesting possible contamination from industrial emissions. Ca was the most abundant cation (108 mg/L). Rainwater pH was rather neutral. Cu was the most prevalent heavy metal (concentrations up to 0.1 mg/L), and RQ values up to 2000, indicating high ecological risk. Cr posed the lowest ecological risk. The elevated Ni, and Cl concentrations suggest that untreated rainwater is unsuitable for direct reuse. To mitigate risks, appropriate treatment, e.g., filtration, membrane processes, or disinfection (depending on the expected outcomes), is recommended. The findings highlight the need for effective rainwater management and the environmental impact of industrial activities.
雨水质量受到工业活动的强烈影响。同时,在水资源日益短缺的情况下,它指出了一种潜在的补充水资源。因此,监控其质量是必不可少的。这是第一批旨在评估工业区(波兰下西里西亚)收集的雨水质量的研究之一,并结合对重金属(HMs)毒性的评估来评估其生态风险。雨水样本从五个地点(排水沟和蓄水池)收集。选定的理化参数(pH、电导率、总悬浮和溶解固体、总磷、BOD5和COD)、离子(Ca、Cl−、SO42−、F−、Al、氮化合物)和选定的HMs (Cu、Ni、Cr、Cd)在认证实验室进行了分析。采用风险商(RQ)法,通过比较最大观测浓度与文献推导的预测无效应浓度(PNEC)来评估生态风险。除Ni(最高0.098毫克/升)和Cl-(最高302毫克/升)外,大多数参数符合世界卫生组织的准则,表明可能受到工业排放的污染。钙离子含量最高,为108 mg/L。雨水pH值相当中性。铜是最常见的重金属(浓度高达0.1 mg/L), RQ值高达2000,表明生态风险高。Cr的生态风险最低。Ni和Cl−浓度的升高表明未经处理的雨水不适合直接回用。为降低风险,建议采取适当的处理措施,如过滤、膜处理或消毒(取决于预期结果)。研究结果强调需要有效的雨水管理和工业活动对环境的影响。
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引用次数: 0
Sustainable-circular water resources management in the mining industry using system dynamics modeling 利用系统动力学建模的采矿业可持续循环水资源管理
IF 7.5 3区 工程技术 Q1 WATER RESOURCES Pub Date : 2025-07-31 DOI: 10.1016/j.wri.2025.100313
Elahe Irandoost , Ahmad Ghorbanpour , Hadi Balouei Jamkhaneh , Peiman Ghasemi , Erfan Babaee Tirkolaee
Mining is seen as a water-consuming industry, whereas the number of mining industries increases, followed by the excessive consumption of groundwater. An efficient water management system, pursuing a global objective of sustainable development and circular solutions, is needed at the production process level. Hence, to separate economic development and growth from the excessive consumption of resources, the alternative Circular Economy (CE) model is recommended as a new paradigm of the economy for sustainable development. This study aims to design a dynamic model which allows the analysis of various scenarios in line with sustainable Water Consumption Management (WCM) in the mining industries, considering the components of CE. In this work, the water system of mining industries is modeled using the System Dynamics (SD) approach in a southern province of Iran, given the impact of components of the CE on water demand, industrial balance, and groundwater volume by 2041. Findings demonstrate that implementing three strategies of reduction, recovery and reuse in the mining industries of Bushehr Province through public policies encourages the use of water consumption reduction technology in the mining industry units, wherein greet growth in the number of active units, 90 % reduction in the stagnant units, 92 % reduction in water consumption per capita and 70 % reduction in the water demand of mining industries are observed. Therefore, compliance with CE principles in this industry can solve the main concerns of Water Resources Management (WRM), such as increasing water productivity, reducing water withdrawal from existing sources, and reducing per capita water consumption.
采矿业被认为是一个耗水的行业,而采矿业的数量增加,随之而来的是地下水的过度消耗。在生产过程一级需要一个有效的水管理系统,追求可持续发展和循环解决方案的全球目标。因此,为了将经济发展和增长与资源的过度消耗分开,建议将循环经济(CE)模式作为可持续发展经济的新范式。本研究旨在设计一个动态模型,考虑到可持续用水管理的组成部分,该模型可以分析采矿行业可持续用水管理(WCM)的各种情景。在这项工作中,使用系统动力学(SD)方法对伊朗南部省份的采矿业水系统进行建模,考虑到CE的组成部分对2041年的水需求、工业平衡和地下水量的影响。研究结果表明,通过公共政策在布什尔省采矿业实施减量化、回收和再利用三种战略,鼓励采矿业单位使用节水技术,其中,采矿业活跃单位数量增加了1倍,停滞单位减少了90%,人均用水量减少了92%,需水量减少了70%。因此,在这个行业遵守CE原则可以解决水资源管理(WRM)的主要问题,如提高水生产率,减少从现有水源取水,减少人均用水量。
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引用次数: 0
Evaluating the effectiveness of natural wastewater treatment systems from intensive trout aquaculture facilities 评估集约化鳟鱼养殖设施自然废水处理系统的有效性
IF 7.5 3区 工程技术 Q1 WATER RESOURCES Pub Date : 2025-07-30 DOI: 10.1016/j.wri.2025.100314
Marcin Sidoruk , Ireneusz Cymes , Skwierawski Andrzej , Mirosław Skorbiłowicz
With the intensification of aquaculture and its environmental consequences, natural wastewater treatment methods are gaining increasing importance. This study assessed the effectiveness of two nature-based solutions (treatment ditches and sedimentation ponds) in improving the quality of effluents from four trout farms. Water quality parameters were analyzed before and after treatment, focusing on nitrogen compounds, organic matter, total suspended solids, and oxygen dynamics. Statistical analyses revealed significant correlations between selected indicators. Treatment ditches were particularly effective in removing nitrogen compounds, notably ammonia and nitrite, while sedimentation ponds showed greater efficiency in reducing organic matter and Biochemical oxygen demand (BOD5). However, an increase in suspended solids was observed in some cases, especially on Farm 4 (34 %). These findings highlight that ditches are more suited to rapid nitrogen reduction, whereas ponds provide stable organic matter treatment but may require monitoring for solid accumulation. The combined use of both systems can enhance wastewater treatment outcomes and mitigate the environmental impact of intensive aquaculture. The results contribute to a better understanding of cost-effective and sustainable strategies for managing aquaculture effluents.
随着水产养殖的加剧及其对环境的影响,废水的自然处理方法越来越受到重视。本研究评估了两种基于自然的解决方案(处理沟和沉淀池)在改善四个鳟鱼养殖场出水质量方面的有效性。分析了处理前后的水质参数,重点分析了氮化合物、有机物、总悬浮物和氧动力学。统计分析显示,所选指标之间存在显著相关性。处理沟在去除氮化合物,特别是氨和亚硝酸盐方面特别有效,而沉淀池在减少有机物和生化需氧量(BOD5)方面表现出更高的效率。然而,在某些情况下,观察到悬浮固体的增加,特别是在4号农场(34%)。这些发现强调沟渠更适合快速氮还原,而池塘提供稳定的有机物处理,但可能需要监测固体积累。两种系统的联合使用可以提高废水处理效果,减轻集约化水产养殖对环境的影响。研究结果有助于更好地了解管理水产养殖废水的成本效益和可持续战略。
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引用次数: 0
Experimental research of combined ozone/hydrogen peroxide oxidative degradation of chemical oxygen demand in sauce-flavored liquor wastewater 臭氧/双氧水联合氧化降解酱酒废水化学需氧量的实验研究
IF 4.5 3区 工程技术 Q1 WATER RESOURCES Pub Date : 2025-07-26 DOI: 10.1016/j.wri.2025.100312
Benfu Luo , Jie Yu , Weiwei Huang , Xiang Zhou , Jinyin Li , Qiang Zhang , Haiyan Ning , Jiuzheng Wang , Haixin He , Yujing Yan , Yuhang Liu
Sauce-flavored liquor wastewater is characterized by high concentrations of complex organic compounds that resist degradation, resulting in chemical oxygen demand (COD) values well above the permissible limit of 15 mg/L despite multi-stage treatment. This study systematically optimized the operational parameters for both ozone-only oxidation and O3/H2O2 co-oxidation using one-factor experiments, orthogonal design, and response surface methodology to evaluate their efficacy in deep COD reduction. Under optimized conditions, ozone-only oxidation achieved only a 60 % COD removal efficiency, with low ozone utilization efficiency and high dosage requirements. To address these shortcomings, an O3/H2O2 combined oxidation approach was adopted. At pH 8.5 with ozone and hydrogen peroxide dosages of 100 mg/L and 94 mg/L, respectively, the COD removal efficiency increased markedly to 78.6 %, reducing effluent COD to 9 mg/L while lowering ozone consumption by 28.6 %. Kinetic analysis confirmed adherence to a second-order reaction model. The O3/H2O2 co-oxidation technology thus offers superior efficiency and cost-effectiveness for treating recalcitrant sauce-flavored liquor wastewater, presenting a promising industrial solution for the deep treatment of hard-to-degrade organic effluents.
酱酒废水的特点是高浓度的复杂有机化合物难以降解,尽管经过多级处理,化学需氧量(COD)仍远高于15 mg/L的允许限值。本研究采用单因素实验、正交设计和响应面法对臭氧氧化和O3/H2O2共氧化的操作参数进行了系统优化,以评价其对深度COD的还原效果。在优化条件下,单臭氧氧化法COD去除率仅为60%,臭氧利用率低,投加量要求高。为了解决这些问题,采用了O3/H2O2联合氧化法。在pH为8.5、臭氧投加量为100 mg/L、双氧水投加量为94 mg/L时,COD去除率显著提高至78.6%,出水COD降至9 mg/L,臭氧消耗量降低28.6%。动力学分析证实符合二级反应模型。因此,O3/H2O2共氧化技术为处理顽固的酱味白酒废水提供了卓越的效率和成本效益,为难以降解的有机废水的深度处理提供了一个有前途的工业解决方案。
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引用次数: 0
Hydrated electrons and other reductive species - properties, formation and applications in advanced reduction processes for degradation of emerging organic pollutants – a review 综述了水合电子和其他还原性物质的性质、形成及其在降解新兴有机污染物的高级还原工艺中的应用
IF 7.5 3区 工程技术 Q1 WATER RESOURCES Pub Date : 2025-07-11 DOI: 10.1016/j.wri.2025.100311
Bakhtiar Ali Samejo , Manoj P. Rayaroth , Chongqing Wang , Xun Sun , Grzegorz Boczkaj
The hydrated electron (eaq) has received significant attention in advanced oxidation processes (AOPs) and currently in advanced reduction processes (ARPs). This review offers an up-to-date information about the structure, reactivity, and stability of eaq and environmental applications. Various ARPs, particularly generating eaq such as UV/reductants (sulfite, iodide, dithionite and ferrous ion), and innovative technologies (e-beam, plasma, sonochemistry, photocatalysis) are discussed. Optimal conditions needed to produce enough eaq, benefits and drawbacks of each system are given in this review. Moreover, the degradation effectiveness of chlorinated and fluorinated chemicals, nitro-derivatives, and other compounds are discussed. It has been found that effectiveness of ARPs, varied with the utilized processes. Per- and polyfluoroalkyl substances (PFAS) were reduced effectively using UV/indole and UV/sulfite processes. UV/iodide needed more time to degrade them. Among the various co-existing interfering matrices, dissolved organic matter was a crucial eaq scavenger. But, low amounts of humic acids (HA) could boost photo-reductive pollutants degradation. In addition, eaq -based photochemical methods effectively reduced inorganic compounds i.e., bromates (BrO3), nitrates (NO3), arsenic in a form of As(V) and As(III). Types of scavengers as well as methods for identification of reductive species contributing to degradation mechanism were discussed. Decrease of the matrix effect provide additional processes which will allow to preconcentrate target pollutants and eliminate most of matrix components – such approaches based on effective separation techniques like adsorption or membrane processes are currently under high interest.
Finally, impact of process variables on ARPs effectiveness, such as pH, dissolved oxygen, temperature, pollutant concentration, and UV intensity are discussed. Still debatable is effect of dissolved oxygen, high scavenging effect was reported for several systems, including UV/iodide – anaerobic conditions obtained by nitrogen or argon purging where needed. Other studies (UV/sulfite) showed minor effect, probably by oxygen removal using excess of reductant. Preference of basic pH and high selectivity makes the ARPs a promising alternative to AOPs.
水合电子(e−aq)在高级氧化过程(AOPs)和高级还原过程(ARPs)中受到了广泛的关注。本文综述了e - aq的结构、反应性、稳定性和环境应用方面的最新信息。讨论了各种ARPs,特别是产生e- aq的UV/还原剂(亚硫酸盐,碘化物,二亚硝酸盐和亚铁离子)和创新技术(电子束,等离子体,声化学,光催化)。本文给出了产生足够e - aq所需的最佳条件,以及每种系统的优缺点。此外,还讨论了氯化和氟化化学品、硝基衍生物和其他化合物的降解效果。研究发现,ARPs的有效性随所用工艺的不同而不同。采用紫外/吲哚和紫外/亚硫酸盐工艺有效地减少了全氟烷基和多氟烷基物质。紫外线/碘化物需要更多的时间来降解它们。在多种共存的干扰基质中,溶解有机质是重要的e - aq清除剂。但是,少量的腐植酸(HA)可以促进光还原性污染物的降解。此外,基于e−aq的光化学方法有效地还原了无机化合物,如溴酸盐(BrO3−)、硝酸盐(NO3−)、砷(As(V)和As(III))。讨论了清道夫的种类以及对降解机制有贡献的还原性物种的鉴定方法。减少基质效应提供了额外的过程,可以预先浓缩目标污染物并消除大多数基质成分-这种基于吸附或膜处理等有效分离技术的方法目前受到高度关注。最后,讨论了pH、溶解氧、温度、污染物浓度和紫外线强度等工艺变量对ARPs效果的影响。溶解氧的作用仍有争议,据报道,几种系统具有高清除效果,包括在需要时通过氮气或氩气净化获得的UV/碘-厌氧条件。其他研究(紫外线/亚硫酸盐)显示出轻微的影响,可能是使用过量的还原剂去除氧气。ARPs对碱性pH的偏爱和高选择性使其成为AOPs的理想替代品。
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引用次数: 0
Quick food thawing with running water versus a recirculating faucet: Comparison of time to thaw and use of water and energy 用自来水和循环水龙头快速解冻食物:解冻时间和水和能源使用的比较
IF 4.5 3区 工程技术 Q1 WATER RESOURCES Pub Date : 2025-07-10 DOI: 10.1016/j.wri.2025.100310
Jillian P. Fry , Betelhem A. Higi , Aaliyah Philippe-Auguste , Brianna C. Hutchins , Sya B. Kedzior
Freezing is an effective and widely used food preservation method, and frozen food must be thawed safely. The running water method (RWM) involves continuously running cold water over frozen food and is described as a safe and quicker alternative to thawing in a refrigerator. This thawing method appears to be commonly used in food processing and food service settings, but it has received little attention from food supply chain and/or sustainability researchers. A recirculating faucet device that mimics RWM is available in the U.S. We conducted eight thawing trials with two food types, ground beef (2.27 kg) and a seafood mix (0.91 kg), to compare thawing time and use of water and energy. The thaw methods were: RWM with food placed directly in a sink (unsubmerged), RWM in a container (submerged), a recirculating faucet with submerged food, and a refrigerator. Thawing in a refrigerator took 2-3 days, and the other methods took 74 to 198 minutes. The recirculating faucet used about 9 liters of water for each thaw trial, and RWM used 709 to 1466 liters. Estimated energy use by the recirculating faucet was higher but comparable to refrigerator thawing. In all trials, tap water was warmer than 21°C (the maximum water temperature for RWM in U.S. food safety regulations), but the recirculating water cooled to less than 21°C during thawing with the faucet device. Climate change is warming some water sources, and research is needed on implications for food safety and food thawing guidelines.
冷冻是一种有效且应用广泛的食品保存方法,冷冻食品必须安全解冻。自来水法(RWM)是一种持续用冷水浇灌冷冻食物的方法,被认为是一种安全、快速的替代冰箱解冻的方法。这种解冻方法似乎通常用于食品加工和食品服务设置,但很少受到食品供应链和/或可持续性研究人员的关注。模仿RWM的循环水龙头装置已经在美国上市。我们对两种食物进行了8次解冻试验,分别是碎牛肉(2.27公斤)和海鲜混合物(0.91公斤),以比较解冻时间和水和能源的使用。解冻方法是:将食物直接放入水槽(未浸泡),将食物放入容器(浸泡),将食物放入循环水龙头和冰箱。在冰箱中解冻需要2-3天,其他方法需要74到198分钟。每次解冻试验,循环水龙头使用约9升水,RWM使用709至1466升。估计循环水龙头的能源消耗更高,但与冰箱解冻相当。在所有试验中,自来水温度都高于21°C(美国食品安全法规中RWM的最高水温),但在使用水龙头装置解冻时,循环水冷却到21°C以下。气候变化正在使一些水源变暖,需要对食品安全和食品解冻指南的影响进行研究。
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引用次数: 0
Development of a methodology for identifying and quantifying mining environmental liabilities in aquatic ecosystems: A case study of Segovia, Colombia 制定查明和量化水生生态系统采矿环境责任的方法:哥伦比亚塞戈维亚个案研究
IF 4.5 3区 工程技术 Q1 WATER RESOURCES Pub Date : 2025-07-05 DOI: 10.1016/j.wri.2025.100307
Wilfredo Marimon-Bolívar , John Chavarro Diaz , Armando Sarmiento , Nathalie Toussaint Jimenez
Untreated discharges from mining activities threaten aquatic ecosystems, affecting water quality and biodiversity. This study develops a methodology for estimating environmental liabilities in aquatic systems, focusing on Segovia, Colombia (2010–2017). Using historical data (2010–2017), recent monitoring (2021–2023), and modelling tools (HEC-RAS and WASP), water and sediment quality indices were applied to quantify impacts, emphasizing heavy metals and cyanide. The methodology integrated diverse indices to evaluate contamination levels, including the Aquatic Toxicity Index (ATI) for water quality and the Pollutant Load Index (PLI) for sediments. Results revealed increased contaminant concentrations downstream, such as lead (0.4 mg/L) and suspended solids (61 mg/L), exceeding regulatory limits. While local pressures like domestic and illegal mining discharges complicate the pollution scenario, the findings confirm significant environmental liabilities from untreated discharges, impacting ecosystem services and community health. The study demonstrates that, despite pre-existing contamination, mining activities notably degrade water and sediment quality. It highlights critical deposition zones where contaminants accumulate, serving as focal points for remediation. The developed methodology offers a replicable framework, integrating past and current data, modelling, and tailored indices to assess aquatic liabilities effectively. This research provides actionable insights for mitigating mining pollution and restoring affected ecosystems. Bridging gaps in environmental liability quantification supports informed decision-making for environmental management and policy development in mining-impacted regions.
采矿活动未经处理的排放威胁着水生生态系统,影响水质和生物多样性。本研究开发了一种估算水生系统环境负债的方法,重点是哥伦比亚塞戈维亚(2010-2017)。利用历史数据(2010-2017年)、近期监测数据(2021-2023年)和建模工具(HEC-RAS和WASP),应用水和沉积物质量指数来量化影响,重点关注重金属和氰化物。该方法综合了多种指标来评估污染水平,包括水质的水生毒性指数(ATI)和沉积物的污染物负荷指数(PLI)。结果显示,下游的污染物浓度增加,如铅(0.4 mg/L)和悬浮固体(61 mg/L),超过了监管限制。虽然家庭和非法采矿排放等当地压力使污染情况复杂化,但研究结果证实,未经处理的排放会造成严重的环境责任,影响生态系统服务和社区健康。研究表明,尽管存在污染,采矿活动显著降低了水和沉积物的质量。它突出了污染物积聚的关键沉积带,作为修复的焦点。开发的方法提供了一个可复制的框架,整合了过去和当前的数据、建模和量身定制的指数,以有效评估水生责任。这项研究为减轻采矿污染和恢复受影响的生态系统提供了可行的见解。缩小环境责任量化方面的差距有助于为受采矿影响地区的环境管理和政策制定作出知情决策。
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Water Resources and Industry
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