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Applications of remote sensing and GIS techniques for identifying of the plastic waste from space: Evidence from Khulna city corporation in Bangladesh
IF 3.9 Q2 ENVIRONMENTAL SCIENCES Pub Date : 2024-12-01 DOI: 10.1016/j.cacint.2024.100179
Md Nahid Ferdous , Mohammad Ismail Hossain , Mohammed Manik
Plastic waste poses a significant threat to the environment, public health, and aquatic life. Several methods are now under development in many studies to monitor plastic waste through earth observation satellites. These methods were successfully applied to monitor plastic litter and debris. Due to the special optical signature of plastic, it is easy to identify it in aquatic environments. But in the case of identifying plastic waste on land or in a terrestrial environment, it is very difficult as different types of land cover have their own special optical signature. Conducting field surveys could be a possible solution for monitoring plastic waste on land, but it’s costly and time-consuming. To tackle this problem, remote sensing-based observation can make a sustainable contribution. This study aims to identify plastic waste on land by the combination of Sentinel-2 imagery and two supervised classification algorithms: (1) maximum likelihood and (2) support vector classification. Two locations where plastic waste was recycled were considered for conducting this study by field observations. A total of 60 samples have been taken in this study, out of which 80% (48) have been taken as training samples and the remaining 20% (12) have been taken as testing samples, and the entire process was done using ArcGIS 10.8. This analysis revealed that algorithms used in this study successfully identify plastic waste on land, and between two algorithms, support vector classification achieves the highest accuracy (93%). Bands 6, 7, and 8 show higher spectral reflectance for plastic. The finding suggests that supervised algorithms can be used to identify plastic waste on land. Other algorithms, high-resolution satellite imagery, and a larger dataset are necessary to identify smaller plastic waste on land. This study will help policymakers and decision-makers at national and local levels to identify and management of plastic waste in a sustainable way.
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引用次数: 0
Relationship between negative air ions and environmental factors in the urban forest parks of Yangzhou in urban and suburban areas 扬州市区和郊区城市森林公园空气负离子与环境因素的关系
IF 3.9 Q2 ENVIRONMENTAL SCIENCES Pub Date : 2024-11-22 DOI: 10.1016/j.cacint.2024.100181
Xin Wan , Runyang Zhou , Liwen Li , Can Yang , Jingwei Lian , Jiaojiao Zhang , Sian Liu , Wei Xing , Yingdan Yuan
Negative air ions (NAIs) play an important role in human well-being, serving as key indicators of air cleanliness and contributing to both psychological and physiological health. This study aims to investigate the factors influencing NAI concentration in urban and suburban forest parks, enhancing our understanding of the correlation between NAIs and environmental factors. Songjiacheng Urban Forest Park and Runyang Wetland Suburban Forest Park in Yangzhou City were selected as the subjects of this research, and continuous measurements of NAI concentration were conducted over a three-year period. Additionally, seven meteorological factors were monitored. A random forest model was employed to analyze and compare the data from the two forest parks, identifying the environmental factors with significant impacts on NAI concentration. The results indicate that in Songjiacheng Urban Forest Park, NAIs exhibited significant sensitivity to temperature, followed by atmospheric pressure. Conversely, in Runyang Wetland Suburban Forest Park, PM2.5 (particulate matter 2.5) exerted the greatest impact on NAIs, followed by humidity. We conducted a thorough analysis of data to explore the intricate connections between negative air ions and a variety of environmental factors within two urban forest parks. Our findings have significantly broadened our perspective on the characteristics of Negative Air Ions (NAIs) and their management implications within these urban green spaces. This enhanced understanding is pivotal for developing more effective strategies for environmental stewardship and the preservation of these vital urban ecosystems.
空气负离子(NAIs)是空气清洁度的关键指标,对人类的身心健康起着重要作用。本研究旨在探讨影响城市和郊区森林公园空气负离子浓度的因素,从而加深我们对空气负离子与环境因素之间相关性的理解。本研究选取了扬州市宋家城城市森林公园和润扬湿地城郊森林公园作为研究对象,对其进行了为期三年的NAI浓度连续测量。此外,还对七个气象因子进行了监测。采用随机森林模型对两个森林公园的数据进行了分析和比较,找出了对NAI浓度有显著影响的环境因素。结果表明,在宋家城城市森林公园,NAI对温度有明显的敏感性,其次是大气压力。相反,在润扬湿地郊区森林公园,PM2.5(颗粒物2.5)对净空气指数的影响最大,其次是湿度。我们对数据进行了深入分析,以探索两个城市森林公园内空气负离子与各种环境因素之间的复杂联系。我们的研究结果极大地拓宽了我们对空气负离子(NAIs)特性及其对城市绿地管理影响的认识。这种进一步的了解对于制定更有效的环境管理策略和保护这些重要的城市生态系统至关重要。
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引用次数: 0
Citizen perceptions and interactions towards self-sufficiency, community plot ratio and civic generosity within sustainable neighbourhoods 在可持续街区内,公民对自给自足、社区地积比率和公民慷慨解囊的看法和互动关系
IF 3.9 Q2 ENVIRONMENTAL SCIENCES Pub Date : 2024-11-20 DOI: 10.1016/j.cacint.2024.100180
Joseph Llewellyn, Cecilia Katzeff, Daniel Pargman, Fredrik Johansson
The United Nations Environment Programme (UNEP) released design indexes for sustainable neighbourhoods, including self-sufficiency, community plot ratio and civic generosity. However, they are developed from an urban planning perspective and not researched in relation to: a) the citizen perspective and b) how citizen interactions can contribute to the environment. Therefore, this research tests a novel set of indexes with an underused method of ethnographic video interviews with 14 citizens of a known sustainable neighbourhood in Stockholm, Sweden. A thematic analysis conducted on 28 h of interview data collected over a 4-week period yielded 5 main themes, from outdoor public spaces. Self-sufficiency findings suggest that citizens 1) perceive small scale self-sufficiency to be challenged by large scale structural efficiency and 2) circular actions with food waste to biogas can develop the self-sufficiency index further. Community plot ratio findings suggest that citizens 3) perceive community spaces to be accessible for all but not used by all. Civic generosity findings suggest citizens 4) perceive an imbalance between self-interests of the individual versus collective interests of the community, while 5) experienced citizens feel personally responsible to pioneer civic generosity interactions. UNEP indexes for designing neighbourhoods can define local sustainability, however, our findings support this, only if they can be acted upon by the citizens who live there.
联合国环境规划署(UNEP)发布了可持续街区的设计指数,包括自给自足、社区容积率和公民慷慨度。然而,这些指标都是从城市规划的角度制定的,并没有对以下方面进行研究:a) 公民视角;b) 公民互动如何对环境做出贡献。因此,本研究通过对瑞典斯德哥尔摩一个已知的可持续街区的 14 位市民进行人种学视频访谈,对一套新颖的指标进行了测试。通过对 4 周内收集的 28 小时访谈数据进行主题分析,得出了户外公共空间的 5 大主题。自给自足的研究结果表明:1)市民认为小规模的自给自足受到大规模结构效率的挑战;2)将食物垃圾转化为沼气的循环行动可以进一步提高自给自足指数。社区地块比率调查结果表明,公民 3) 认为社区空间可供所有人使用,但并非所有人都会使用。公民慷慨的调查结果表明,公民 4) 认为个人利益与社区集体利益之间存在不平衡,而 5) 有经验的公民认为个人有责任开拓公民慷慨的互动。联合国环境规划署(UNEP)的街区设计指数可以确定当地的可持续性,然而,我们的研究结果也支持这一点,但前提是居住在当地的市民能够对这些指数采取行动。
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引用次数: 0
A review of primary and cascading hazards by exploring individuals’ willingness-to-pay for urban sustainability policies 通过探讨个人对城市可持续发展政策的支付意愿,审查主要危害和连带危害
IF 3.9 Q2 ENVIRONMENTAL SCIENCES Pub Date : 2024-10-28 DOI: 10.1016/j.cacint.2024.100178
George Halkos , Panagiotis-Stavros Aslanidis , Conrad Landis , Lydia Papadaki , Phoebe Koundouri
The motivation of the present review is to comprehend the interaction between primary and cascading hazards in urban areas, aiming to create a novel holistic approach that improves urban sustainability based on individuals’ preferences for urban ecosystem services (ES) preservation. The objectives are to monitor valuation studies revealing willingness to pay (WTP) for urban challenges, assess non-marketed valuation studies, and examine hazard interactions and their impacts. Using data from Environmental Valuation Reference Inventory and Ecosystem Services Valuation Database, 80 studies on 220 WTP values were analyzed in the period 2000–2023. The findings show a mean WTP (MWTP) of 142€ for heatwave mitigation and 76€ for air pollution. Moreover, in terms of cascading hazards, the highest MWTP was for population density (298€), followed by biodiversity loss (96€), health issues (63€), and lastly by traffic and noise with 42€. Biodiversity loss emerged as the top concern, urging policymakers to enhance urban resilience. The review contributes to the latest literature regarding the MWTP for ES in urban settlements and provides relevant policy implications in order to improve urban resilience, safeguarding both human health and the natural environment.
本综述的动机是理解城市地区原生危害和级联危害之间的相互作用,旨在创建一种新颖的整体方法,根据个人对城市生态系统服务 (ES) 保护的偏好来改善城市的可持续性。目标是监测揭示城市挑战支付意愿(WTP)的估值研究,评估非市场估值研究,并检查危害的相互作用及其影响。利用环境估值参考目录和生态系统服务估值数据库中的数据,对 2000-2023 年期间有关 220 个 WTP 值的 80 项研究进行了分析。研究结果表明,热浪缓解的平均 WTP(MWTP)为 142 欧元,空气污染的平均 WTP(MWTP)为 76 欧元。此外,就逐级危害而言,人口密度的 MWTP 值最高(298 欧元),其次是生物多样性丧失(96 欧元)、健康问题(63 欧元),最后是交通和噪音,为 42 欧元。生物多样性丧失成为人们最关心的问题,这敦促决策者提高城市的抗灾能力。本综述为有关城市住区环境、社会和生态影响的 MWTP 的最新文献做出了贡献,并提供了相关的政策影响,以提高城市复原力,保护人类健康和自然环境。
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引用次数: 0
Climate change hazards and the resilience of coastal cities in the Gulf Cooperation Council countries: A systematic review 气候变化危害与海湾合作委员会国家沿海城市的复原力:系统回顾
IF 3.9 Q2 ENVIRONMENTAL SCIENCES Pub Date : 2024-10-24 DOI: 10.1016/j.cacint.2024.100177
Abdulla Almheiri , Jorge F. Montenegro , Ewane Basil Ewane , Midhun Mohan
Climate change hazards continue to pose detrimental impacts on coastal cities in the Gulf Cooperation Council (GCC) countries (Saudi Arabia, UAE, Qatar, Bahrain, Kuwait, and Oman) of the Middle East, which undermines their climate resilience. The situation is exacerbated by the rapid urban development in coastal cities in the GCC countries over the past 20 years. This review study examined the climate change hazards that are having negative impacts on the resilience of coastal cities in the GCC countries using a systematic literature review approach. It also explores the urban resilience strategies implemented towards climate change hazards mitigation and adaptation in order to build climate-resilient coastal cities in the GCC countries. A total of 48 peer-reviewed articles were included in the systematic review derived from Scopus, WoS, and Google Scholar, covering the nine coastal cities in the six GCC countries. Most of the studies were focused on the coastal cities of Jeddah (30 %) in Saudi Arabia and Doha (24 %) in Qatar, compared to the other seven coastal cities in the GCC countries. Flooding, rising temperature, sea level rise, dust storms, cyclones, and migration of sand dunes were the six most reported climate change hazards, respectively, posing significant negative impacts on coastal cities and undermining their resilience to current and future climate change impacts. The various urban resilience strategies implemented against climate change hazards were categorised under five resilience dimensions: infrastructure resilience, social resilience, environmental resilience, economic resilience, and governance and policy resilience dimensions. The infrastructure resilience dimension was reported in 50.7 % of the studies, since it is the most implemented, while far less research attention was given to the environmental (14.5 %), government and policy (8.7 %), and economic (2.9 %) resilience dimensions of coastal cities in the GCC countries. The urban resilience strategies for climate mitigation and adaptation were reported to have successfully reduced the vulnerability of coastal cities to climate change hazards over the past decade, by improving their climate resilience. The findings contribute to informing urban planning policy-making focused on coastal environmental management in the coastal cities of the GCC countries that should further enhance the climate resilience of these coastal cities.
气候变化危害继续对中东海湾合作委员会(GCC)国家(沙特阿拉伯、阿联酋、卡塔尔、巴林、科威特和阿曼)的沿海城市造成不利影响,削弱了这些城市的气候适应能力。过去 20 年来,海合会国家沿海城市的快速城市发展加剧了这种状况。本综述研究采用系统的文献综述方法,研究了对海湾合作委员会国家沿海城市的抗灾能力产生负面影响的气候变化危害。研究还探讨了海湾合作委员会国家为建设具有气候复原力的沿海城市而实施的减缓和适应气候变化危害的城市复原力战略。系统性文献综述共收录了 48 篇经同行评审的文章,这些文章来自 Scopus、WoS 和 Google Scholar,涵盖了六个海湾合作委员会国家的九个沿海城市。与海湾合作委员会国家的其他七个沿海城市相比,大多数研究都集中在沙特阿拉伯的吉达(30%)和卡塔尔的多哈(24%)。洪水、气温升高、海平面上升、沙尘暴、气旋和沙丘迁移分别是报告最多的六种气候变 化危害,对沿海城市造成了严重的负面影响,削弱了这些城市抵御当前和未来气候变化影响 的能力。针对气候变化危害实施的各种城市抗灾战略分为五个抗灾层面:基础设施抗灾、社会抗灾、环境抗灾、经济抗灾以及治理和政策抗灾。有 50.7%的研究报告了基础设施的抗灾能力,因为它是实施最多的,而对海湾合作委员会国家沿海城市的环境抗灾能力(14.5%)、政府和政策抗灾能力(8.7%)以及经济抗灾能力(2.9%)的研究关注要少得多。据报告,在过去十年中,通过提高沿海城市的气候复原力,减缓和适应气候变化的城市复原力战略成功地降低了沿海城市面对气候变化危害的脆弱性。研究结果有助于为海湾合作委员会国家沿海城市以沿海环境管理为重点的城市规划决策提供信息,从而进一步提高这些沿海城市的气候复原力。
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引用次数: 0
Health impact assessment of exposure to road traffic noise and air pollution according to pre- and post-densification scenarios in Helsingborg, Sweden 瑞典赫尔辛堡道路交通噪声和空气污染暴露对健康影响的评估(根据密集化前和密集化后的设想方案
IF 3.9 Q2 ENVIRONMENTAL SCIENCES Pub Date : 2024-10-22 DOI: 10.1016/j.cacint.2024.100176
Erin Flanagan , Kristoffer Mattisson , Anna Oudin , Susanna Gustafsson , Ebba Malmqvist
A prevalent solution to accommodate population growth due to urbanization is densification. However, this often pushes new residential housing closer to roads, increasing exposure to both noise and air pollution. The present study’s aim was to estimate the health impacts of road traffic-related noise and air pollution for a low-income area (Drottninghög) in Helsingborg, Sweden, according to pre-densification (2012) and post-densification (2030) scenarios.
Road traffic noise was simulated at the façade of residential buildings using the Nordic prediction method, and exposure was assessed using SoundPLAN. Exposure-response functions (ERF) from the WHO were utilized for the following health outcomes associated with noise: annoyance, adverse sleep disturbance, ischemic heart disease (IHD) incidence and IHD mortality. Air pollution (nitrogen dioxide, NO2) was assessed using a Gaussian dispersion model (AERMODE). Health outcomes associated with NO2 included natural cause mortality, pediatric asthma, respiratory hospitalizations and low birth weight (LBW). ERFs were derived from meta-analyses. Health impact assessments were then performed for both scenarios.
Densifying Drottninghög according to the municipality’s planned strategy would lead to a 15 % unit increase in the proportion of residents exposed to road traffic noise above the WHO’s health-based guideline value (53 dB(A) Lden). This was estimated to markedly increase the proportion of residents highly annoyed by traffic noise (7.4–13.9 %) as well as those highly sleep disturbed (3.0–4.9 %). IHD incidence and IHD mortality attributed to noise would increase by an estimated 49 % and 44 %, respectively, post-densification. NO2 exposure was estimated to increase slightly (0.7 µg/m3) post-densification, which would contribute to an estimated 4–6 % increase in natural cause mortality, pediatric asthma, respiratory hospitalization and LBW.
Urban planning initiatives need to consider these prevalent urban environmental exposures and integrate a public health perspective into densification strategies. Doing so can create synergies in the built environment that promote healthy, sustainable cities.
为适应城市化带来的人口增长,一种普遍的解决方案是密集化。然而,这往往会使新建住宅更靠近道路,从而增加噪音和空气污染的暴露。本研究的目的是根据密集化前(2012 年)和密集化后(2030 年)的情景,估算道路交通相关噪声和空气污染对瑞典赫尔辛堡低收入地区(Drottninghög)的健康影响。世卫组织的暴露-反应函数(ERF)用于评估与噪声相关的以下健康结果:烦扰、不良睡眠干扰、缺血性心脏病(IHD)发病率和 IHD 死亡率。空气污染(二氧化氮,NO2)采用高斯扩散模型(AERMODE)进行评估。与二氧化氮相关的健康结果包括自然死亡、小儿哮喘、呼吸道住院和出生体重不足(LBW)。ERF 是通过荟萃分析得出的。根据市政府的规划战略,对 Drottninghög 进行密集化将导致暴露于道路交通噪声的居民比例增加 15%,超过世界卫生组织基于健康的指导值(53 dB(A) Lden)。据估计,受交通噪声严重困扰的居民比例(7.4%-13.9%)和睡眠受到严重干扰的居民比例(3.0%-4.9%)将会显著增加。据估计,人口密度增加后,因噪音导致的心脏病发病率和心脏病死亡率将分别增加 49% 和 44%。据估计,人口密集化后,二氧化氮暴露会略有增加(0.7 微克/立方米),这将导致自然原因死亡率、小儿哮喘、呼吸道住院率和婴儿低体重率估计增加 4-6 %。这样做可以在建筑环境中产生协同效应,促进城市的健康和可持续发展。
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引用次数: 0
Mapping heat-related risks in Swiss cities under different urban tree scenarios 绘制不同城市树木情景下瑞士城市与热有关的风险图
IF 3.9 Q2 ENVIRONMENTAL SCIENCES Pub Date : 2024-10-16 DOI: 10.1016/j.cacint.2024.100175
Myke Koopmans , Jonas Schwaab , Ana M. Vicedo-Cabrera , Edouard L. Davin
About three quarter of Swiss residents live in urban areas, and this proportion is expected to grow in future decades. An increasing number of people will therefore be exposed to urban heat, which can have adverse effects on human wellbeing, productivity and physical health.
We explore the possibility to detect high-risk areas in five Swiss cities with the development of an urban heat-based risk-mapping approach. The included cities are Basel, Bern, Geneva, Lausanne and Zurich. The analysis is based on a combination of biophysical, including Landsat 8 derived Land Surface Temperature (LST), and socioeconomic data. Additionally, we assess the impact of urban trees on urban heat within the districts of these cities, helping to estimate how risk levels would change under two scenarios: one with increased tree cover (MaxTree) and another with no (NoTree) urban trees.
The assessment on the impact of urban trees on heat showed that the areas with urban trees generally experience cooler temperatures compared to those without, both at the city and district levels. This underscores the positive role of urban trees in mitigating the urban heat effect.
The risk mapping approach revealed a distinct spatial pattern for each city and high risk areas were identified.
Generally, the high-risk areas in the analyzed cities cover the city centers and areas with high vulnerability.
The ‘NoTree’ scenario showed higher risks compared to the baseline situation, illustrating that urban trees currently mitigate heat related risks in Swiss cities. The ‘MaxTree’ scenario results in lower risks, especially in the cities of Lausanne and Bern.
The presented risk mapping approach, including the two idealized scenarios, can be used by policy- and decision-makers (e.g. city planners) can be a tool to determine where urban planning actions are the most urgent and where trees could be most beneficial in terms of adaptation to heat. The approach is easily adaptable and transferable to other cities, since it relies on a clear and simple methodological framework, openly available LST data, and basic socioeconomic variables at district scale that are available for many cities.
瑞士约有四分之三的居民生活在城市地区,预计这一比例在未来几十年内还将增长。因此,越来越多的人将暴露在城市热浪中,这可能会对人类福祉、生产力和身体健康造成不利影响。我们通过开发一种基于城市热浪的风险绘图方法,探索在瑞士五个城市中发现高风险区域的可能性。这些城市包括巴塞尔、伯尔尼、日内瓦、洛桑和苏黎世。分析基于生物物理数据(包括大地遥感卫星 8 推算的地表温度 (LST) 数据)和社会经济数据的结合。此外,我们还评估了城市树木对这些城市各区城市热量的影响,帮助估算在两种情况下风险水平将如何变化:一种情况是树木覆盖率增加(MaxTree),另一种情况是没有树木(NoTree)。一般来说,所分析城市的高风险区域包括城市中心和高脆弱性区域。"无树 "情景与基线情景相比显示出更高的风险,说明城市树木目前减轻了瑞士城市与热有关的风险。所提出的风险绘图方法,包括两种理想化的情景,可供政策制定者和决策者(如城市规划者)使用,可作为一种工具来确定哪些城市规划行动最为紧迫,哪些地方的树木最有利于适应高温。由于该方法依赖于一个简单明了的方法框架、公开可用的 LST 数据以及许多城市都有的地区尺度的基本社会经济变量,因此很容易适应和移植到其他城市。
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引用次数: 0
Assessing the degree of personal exposure to PM2.5 in growing cities of Rwanda based on time-activity patterns and microenvironments 根据时间活动模式和微环境评估卢旺达发展中城市中个人接触 PM2.5 的程度
IF 3.9 Q2 ENVIRONMENTAL SCIENCES Pub Date : 2024-10-02 DOI: 10.1016/j.cacint.2024.100174
Abdou Safari Kagabo , Bonfils Safari , Jimmy Gasore , Bethwel Kipkoech Mutai
Long-term exposure to fine particulate matter (PM2.5) is strongly linked with a wide range of diverse health effects making it a substantial global threat and a critical concern for public health. While studies have been conducted on personal exposure (PE) to PM2.5 in specific environments, contributions of different microenvironments and activities to overall daily PE remain unclear. This study evaluates the degree of PE to PM2.5 in five growing cities of Rwanda based on individual’s time-activity patterns and visited microenvironments. A total of 150 participants were recruited to collect real-time personal and ambient PM2.5 measurements during their routine activities in different outdoor and indoor microenvironments for five consecutive days in dry season. Each participant was an employee in one of the six most prevalent urban economic activities found in their city of residence: workshops, flour mill plants, near road activities, garages, markets, kitchens and motorcycle taxi services. The participant’s day was categorized into three most distinct microenvironments grouped under home, work, and other microenvironments (other MEs). PE to PM2.5 assessed for all participants showed significant variability among types of activities and categories of microenvironments (p < 0.05). The work microenvironment experienced the highest daily mean PM2.5 exposures ranging from 12.67 μg/m3 to 192.64 μg/m3, followed by other MEs ranging from 13.25 μg/m3 to 113.58 μg/m3, while the lowest exposures observed at home microenvironment with concentrations ranging from 11.69 μg/m3 to 72.54 μg/m3 among 7 monitored activities in 5 cities. Exposure contributions and personal-ambient differences were dominated by the work microenvironment, with a daily contribution of flour milling activities reaching up to 51.55 %; and some participants were exposed to maximum PM2.5 concentrations up to 22 times higher than ambient levels while in the kitchen activities. This study highlights the significant effects of daily personal activities and visited microenvironments on personal PM2.5 exposure, and the importance of considering a personal lifestyle in understanding the true personal exposure.
长期暴露于细颗粒物(PM2.5)与各种不同的健康影响密切相关,这使其成为一个巨大的全球性威胁和公共卫生的重要问题。虽然对特定环境中 PM2.5 的个人暴露量(PE)进行了研究,但不同微环境和活动对日常总体暴露量的贡献仍不清楚。本研究根据个人的时间活动模式和访问的微环境,评估了卢旺达五个发展中城市的 PM2.5 个人暴露程度。研究共招募了150名参与者,在旱季连续5天在不同的室外和室内微环境中收集日常活动中个人和环境PM2.5的实时测量值。每位参与者都是其居住城市中最普遍的六种城市经济活动之一的雇员,这六种经济活动是:车间、面粉厂、道路附近活动、车库、市场、厨房和摩托车出租车服务。参与者的一天被分为三个最不同的微环境,分别是家庭、工作和其他微环境(其他微环境)。对所有参与者的 PM2.5 PE 评估显示,不同活动类型和微环境类别之间存在显著差异(p < 0.05)。工作微环境的PM2.5日均暴露量最高,从12.67 μg/m3到192.64 μg/m3不等,其次是其他微环境,从13.25 μg/m3到113.58 μg/m3不等,而在5个城市的7种监测活动中,家庭微环境的暴露量最低,浓度从11.69 μg/m3到72.54 μg/m3不等。暴露贡献和个人与环境的差异主要来自工作微环境,面粉加工活动的日贡献率高达 51.55%;一些参与者在厨房活动时暴露于最高 PM2.5 浓度,比环境水平高出 22 倍。这项研究强调了日常个人活动和参观微环境对个人 PM2.5 暴露的重要影响,以及考虑个人生活方式对了解真实个人暴露的重要性。
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引用次数: 0
Indoor heat in Amsterdam: Comparing observed indoor air temperatures from a professional network and from a citizen science approach 阿姆斯特丹的室内热量:比较专业网络和公民科学方法观测到的室内空气温度
IF 3.9 Q2 ENVIRONMENTAL SCIENCES Pub Date : 2024-09-29 DOI: 10.1016/j.cacint.2024.100173
Esther Peerlings , Saša Vranic , Joy Ommer , Milan Kalas , Gert-Jan Steeneveld
Ongoing climate change is increasing summertime temperatures, and frequency and intensity of heatwaves in Europe, which can threaten human health. Relatively little is known about how quickly outdoor heat penetrates into residences during heatwaves. Long-term and systematic networks recording indoor temperatures are challenging to install and maintain, and therefore scarce. We first report on crowdsourced indoor air temperature data in residences in Amsterdam (The Netherlands) during a heatwave event in September 2023. These data complement professional long-term indoor air temperature observations in 92 houses in Amsterdam. Second, we document the lessons learnt in the design and execution of this citizen science activity. 571 indoor temperature records were collected through the citizen science crowdsourcing approach, with a median value of 28.0 °C on the warmest day in the study period, while outdoor mean minimum and maximum temperatures reached 20.6 °C and 31.1 °C respectively. The results indicate that the crowdsourcing approach reports temperatures that are significantly higher than the professional approach, which supports the need for professional indoor networks. Finally, local media attention was critical in reaching a wide audience.
持续的气候变化正在增加欧洲夏季的气温、热浪的频率和强度,从而威胁人类健康。人们对热浪期间室外热量如何快速渗入室内知之甚少。长期、系统地记录室内温度的网络在安装和维护方面具有挑战性,因此非常稀缺。我们首次报告了 2023 年 9 月热浪期间荷兰阿姆斯特丹居民室内空气温度的众包数据。这些数据是对阿姆斯特丹 92 所住宅的专业长期室内空气温度观测数据的补充。其次,我们记录了在设计和实施这一公民科学活动过程中吸取的经验教训。通过公民科学众包方法收集了 571 条室内温度记录,研究期间最热一天的中值为 28.0 °C,室外平均最低气温和最高气温分别达到 20.6 °C和 31.1 °C。结果表明,众包方法报告的气温明显高于专业方法,这支持了对专业室内网络的需求。最后,当地媒体的关注对广泛受众至关重要。
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引用次数: 0
Evaluating energy generation potential from municipal solid waste in an open dumping site of Khulna 评估库尔纳露天垃圾场城市固体废物的能源生产潜力
IF 3.9 Q2 ENVIRONMENTAL SCIENCES Pub Date : 2024-09-24 DOI: 10.1016/j.cacint.2024.100172
Saptarshi Mondal, Islam M. Rafizul
The expanding global population, waste output, land scarcity, and environmental deterioration make waste-to-energy (WtE) technology a feasible option for managing MSW. This study explores the economic benefits of WtE in the Rajbandh open dumpsite in Khulna and the potential of generating energy from MSW. The electricity generation potential under alternative scenarios namely scenario 2 (landfill gas to electricity (LFGTE)), scenario 3 (mass-burn incineration), scenario 4 (hybrid LFGTE, mechanical–biological treated (MBT) anaerobic digestion (AD) and incineration), and scenario 5 (hybrid AD and refuse-derived fuel (RDF) incineration) is based on projected waste generation over the next 20 years, taking population growth into account. These four options are compared to Business as Usual (BAU). Scenario 3 has the highest electricity generation capacity at 207799.73 MWh/year, followed by hybrid RDF-incineration/MBT-AD (scenario 5), LFGTE, however, lowest generation at 30683.07 MWh/year. Net Present Value (NPV), Levelized Cost of Electricity (LCOE), and Payback Period define each scenario’s economic feasibility. Due to its greatest NPV of approximately 41.378 million USD, Scenario 3 is the most economically beneficial. Sensitivity analysis has been done selecting some sensitive parameters to evaluate the robustness of the output. Waste reduction model (WARM) estimates greenhouse gas (GHG) emissions and energy use for each scenario. However, scenario 3 has the lowest GHG emissions and energy use. In addition to reducing GHG emissions and energy usage, recycling waste increased NPV and economic benefits. This analysis reveals that scenario 3 is the best way to generate power, provide economic benefits, and reduce energy consumption for ecologically friendly waste management in Khulna City.
随着全球人口的增长、废物产量的增加、土地的稀缺和环境的恶化,废物变能源(WtE)技术已成为管理城市固体废物的可行选择。本研究探讨了在库尔纳 Rajbandh 露天垃圾场进行 WtE 的经济效益,以及利用城市固体废物产生能源的潜力。根据对未来 20 年垃圾产生量的预测,并考虑到人口增长因素,对备选方案(方案 2(垃圾填埋气发电 (LFGTE))、方案 3(大规模焚烧)、方案 4(混合 LFGTE、机械生物处理 (MBT) 厌氧消化 (AD) 和焚烧)以及方案 5(混合厌氧消化和垃圾衍生燃料 (RDF) 焚烧)的发电潜力进行了分析。这四个方案与 "一切照旧"(BAU)方案进行了比较。方案 3 的发电量最高,为 207799.73 兆瓦时/年,其次是混合型 RDF-焚烧/MBT-AD(方案 5),然而,LFGTE 的发电量最低,为 30683.07 兆瓦时/年。净现值 (NPV)、平准化电力成本 (LCOE) 和投资回收期确定了每个方案的经济可行性。方案 3 的净现值最大,约为 4137.8 万美元,因此经济效益最高。敏感性分析选择了一些敏感参数,以评估输出的稳健性。减少废物模型(WARM)估算了每种方案的温室气体(GHG)排放量和能源使用量。然而,方案 3 的温室气体排放量和能源使用量最低。除了减少温室气体排放和能源消耗外,废物回收还增加了净现值和经济效益。该分析表明,方案 3 是库尔纳市进行生态友好型废物管理的最佳发电方式,既能提供经济效益,又能减少能源消耗。
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引用次数: 0
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