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Development of the CoSIE Lab: An advanced laboratory for multi-domain indoor environmental quality research CoSIE实验室的发展:多领域室内环境质量研究的先进实验室
Pub Date : 2025-09-05 DOI: 10.1016/j.indenv.2025.100120
Jun Jiang , Tobias Maria Burgholz , Kai Rewitz , Rita Streblow , Dirk Müller
Laboratory studies are essential in advancing multi-domain indoor environmental quality (IEQ) research, as they provide highly controllable, precise, and reproducible conditions for investigating the effects of various IEQ factors on occupants’ health and behavior. However, many existing IEQ laboratories face significant challenges, including inadequate multi-domain control, limited participant-laboratory interaction, and incomplete performance testing. This paper presents the comprehensive development process of the Comfort Studies and Indoor Environment Laboratory (CoSIE Lab), a flexible and expandable research facility designed to control IEQ factors across thermal, indoor air quality, visual, and acoustic domains. The development process is organized into distinct phases: conceptual planning, design and construction, commissioning and performance testing, and experimental applications. Through this structured approach, we aim to share valuable insights and lessons learned from the development of the CoSIE Lab. Key findings indicate that capillary tube mat is an effective solution for radiant temperature control. In conjunction with a hydronic system, the CoSIE Lab achieves 76 zones with individual surface temperature control ranging from 15 °C to 40 °C. The surface radiant system enhances air conditioning process, enabling both homogenous and heterogenous air temperature distributions within the test rooms. Measurements of illuminance and color temperature demonstrate close alignment with design specifications for artificial lighting as simulated in software. An acoustic assessment reveals potential overestimation of effective absorption areas when applying the DIN EN 12354‐6 model for reverberation time calculations. In addition to these findings, this study contributes to enhancing clarity and consistency in research dissemination related to IEQ laboratory developments.
实验室研究是推进多领域室内环境质量(IEQ)研究的关键,因为它们为研究各种IEQ因素对居住者健康和行为的影响提供了高度可控、精确和可重复的条件。然而,许多现有的IEQ实验室面临着巨大的挑战,包括不充分的多域控制,有限的参与者-实验室互动,以及不完整的性能测试。本文介绍了舒适研究和室内环境实验室(CoSIE实验室)的全面发展过程,这是一个灵活和可扩展的研究设施,旨在控制热、室内空气质量、视觉和声学领域的IEQ因素。开发过程分为不同的阶段:概念规划、设计和建造、调试和性能测试以及实验应用。通过这种结构化的方法,我们旨在分享从CoSIE实验室的发展中获得的宝贵见解和经验教训。研究结果表明,毛细管垫是辐射温度控制的有效解决方案。CoSIE实验室与水力系统相结合,可实现76个区域,单个表面温度控制范围为15°C至40°C。表面辐射系统增强了空调过程,使测试室内的均匀和非均匀空气温度分布成为可能。照度和色温的测量表明,在软件中模拟的人工照明与设计规范密切一致。声学评估表明,当应用DIN EN 12354‐6模型进行混响时间计算时,可能会高估有效吸收面积。除了这些发现外,本研究还有助于提高与IEQ实验室发展有关的研究传播的清晰度和一致性。
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引用次数: 0
Estimating the indoor heat stress of low-socioeconomic status households in Jalna district of Maharashtra (India) 印度马哈拉施特拉邦Jalna地区低社会经济地位家庭的室内热应力估算
Pub Date : 2025-08-28 DOI: 10.1016/j.indenv.2025.100119
Premsagar Prakash Tasgaonkar , Priyanka Arun , Kamal Kumar Murari
Projections regarding climate change indicate that globally, densely populated areas are poised to witness a heightened frequency of more severe and prolonged heat waves. Indoor conditions, including housing roofs, and circulation systems significantly influence the impact of heat-related issues and discomfort. Literature on heat-related vulnerability studies often lacks substantial references to these factors. This study seeks to comprehend the influence of various roof types on heat risks in a semi-arid region village in Maharashtra, India. The study uses indoor data loggers to observe temperature & relative humidity in different housing conditions. Wet-Bulb Globe Temperature (WBGT) is derived to evaluate heat-risk exposure in indoor environments. Findings reveal that dwellings with tin roofs experience higher and more prolonged heat risks compared to Reinforced Cement Concrete (RCC) or thatch roof houses. Moreover, RCC and tin roofs exhibit increased exposure during the day WBGT (5–7 °C higher during night WBGT), whereas thatched roofs display minimal daily WBGT variation, indicating robust heat resilience. Ceiling fans consistently lower indoor WBGT and thus reduce heat‑risk hours across all roof types, though their effectiveness varies by time of day and housing material. Fans offer cooling benefit in the early morning from 12 am to 10 am and late evening hours from 7 pm to 11 pm. Ceiling fans reduce indoor WBGT by approximately 1.1°C in tin‑roof houses, 1.4°C in thatched houses, and 1.5°C in RCC houses, demonstrating their pronounced cooling efficacy during these heat periods.
有关气候变化的预测表明,在全球范围内,人口稠密地区将出现更严重、更持久的热浪。室内条件,包括房屋屋顶和循环系统显著影响与热有关的问题和不适。热相关脆弱性研究的文献往往缺乏对这些因素的实质性参考。本研究旨在了解不同屋顶类型对印度马哈拉施特拉半干旱地区村庄热风险的影响。该研究使用室内数据记录仪来观察不同住房条件下的温度和相对湿度。湿球温度(WBGT)用于评估室内环境中的热风险暴露。研究结果显示,与钢筋水泥混凝土(RCC)或茅草屋顶的房屋相比,锡屋顶的住宅经历了更高、更长时间的热风险。此外,碾压混凝土和锡屋顶在白天的温度变化中表现出增加的暴露(在夜间温度变化中高出5-7°C),而茅草屋顶的温度变化最小,表明其耐热性很强。吊扇始终降低室内WBGT,从而减少所有屋顶类型的热风险时间,尽管其效果因一天中的时间和房屋材料而异。风扇在凌晨12点 am至10点 am和晚上7点 pm至11点 pm提供冷却效果。吊扇在锡屋顶房屋中可减少约1.1°C的室内WBGT,在茅草屋顶房屋中可减少1.4°C,在碾压混凝土房屋中可减少1.5°C,这表明吊扇在这些高温时期具有显著的冷却效果。
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引用次数: 0
Volatile organic compounds from topical drugs and medical products: Effects on air quality and healthcare environments 外用药物和医疗产品中的挥发性有机化合物:对空气质量和医疗环境的影响
Pub Date : 2025-08-27 DOI: 10.1016/j.indenv.2025.100117
Amber M. Yeoman , Marvin Shaw , Martyn Ward , Thomas Warburton , Alastair C. Lewis
Fifteen commonly used topical drugs and five medical products were evaluated using headspace Q-TOF GC/MS to assess VOCs emissions into healthcare environments and potential patient inhalation. The speciation of VOCs found in medicine products was less complex than typically found in non-medicated, cosmetic skincare products. VOCs arising from medicinal products could be classified as being related to product performance (e.g., solvent), product fragrance, and likely trace contaminants unintentionally included. The scale of emissions and resulting inhalation could be significant for products that are facially applied, and there may be some potential for wider indoor air quality effects if used regularly in poorly ventilated spaces. Emission rates from topical drugs were then quantified using SIFT-MS, focusing on the ten most abundant/commonly found species identified by Q-TOF GC/MS – 2-propanol, benzaldehyde, benzyl alcohol, cyclohexane, ethanol, menthol, methyl salicylate, phenol, and limonene and eucalyptol (representing the total of all terpene species). Emission rates were in the range 9.7 × 10−5 µg s−1 g [product] −1 to 5.9 µg s−1 g [product] −1.
采用顶空Q-TOF气相色谱/质谱法对15种常用外用药物和5种医疗产品进行了评估,以评估医疗环境中挥发性有机化合物的排放和潜在的患者吸入。在医药产品中发现的挥发性有机化合物的形态比通常在非医药化妆品护肤产品中发现的要简单。来自医药产品的挥发性有机化合物可归类为与产品性能(如溶剂)、产品香味和可能无意中包含的微量污染物有关。对于面部使用的产品,排放和由此产生的吸入的规模可能很大,如果经常在通风不良的空间使用,可能会对室内空气质量产生更大的影响。然后使用SIFT-MS对外用药物的排放率进行量化,重点关注通过Q-TOF GC/MS鉴定出的10个最丰富/最常见的物种- 2-丙醇、苯甲醛、苯甲醇、环己烷、乙醇、薄荷醇、水杨酸甲酯、苯酚、柠檬烯和桉树醇(代表所有萜烯物种的总数)。排放率范围为9.7 × 10−5µg s−1 g [product]−1至5.9 µg s−1 g [product]−1。
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引用次数: 0
Self-reported indoor climate in shared vs. private offices and its effects on headache and respiratory symptoms in Norwegian office workers 挪威办公室员工自我报告的共享与私人办公室室内气候及其对头痛和呼吸道症状的影响
Pub Date : 2025-08-22 DOI: 10.1016/j.indenv.2025.100118
Therese Nitter Moazami , Tom Sterud
This two-wave cross-sectional study analyzed data from 7968 Norwegian office workers collected in 2016 and 2019 to investigate associations among self-reported indoor climate, headaches, and respiratory symptoms across six office types. Interaction effects between office type, indoor climate, and health outcomes were assessed, alongside a mediation analysis examining indoor climate as a mediator between office type and health outcomes. Adjusted generalized linear models (GLMs) revealed that shared offices had significantly poorer indoor climate conditions than private offices, with the highest odds reported in flexible spaces (OR = 1.72, 95 % CI: 1.41–2.09) and offices with over 24 occupants (OR = 1.57, 95 % CI: 1.27–1.93). Self-reported poor indoor climate was associated with respiratory symptoms (OR = 2.17, 95 % CI: 1.74–2.27) and headaches (OR = 1.66, 95 % CI: 1.48 – 1.86). No direct association was found between office type and health outcomes; however, mediation analysis demonstrated a significant indirect effect of office type on health outcomes via indoor climate. Interaction analysis further revealed that the association between poor indoor climate and respiratory symptoms was stronger in shared offices compared to cell offices for both respiratory symptoms (OR = 2.32 vs. OR = 1.80) and headaches (OR = 1.69 vs. OR = 1.44). In conclusion, this study demonstrates notable associations between office type, perceived indoor climate, and self-reported health outcomes. While the cross-sectional design limits the ability to determine the direction or underlying mechanisms of these associations, the results emphasize the relevance of both office layout and indoor climate quality in evaluating workplace health.
这项双波横断面研究分析了2016年和2019年收集的7968名挪威上班族的数据,以调查六种办公室类型中自我报告的室内气候、头痛和呼吸道症状之间的关系。评估了办公室类型、室内气候和健康结果之间的相互作用,并进行了中介分析,检验了室内气候作为办公室类型和健康结果之间的中介。调整后的广义线性模型(GLMs)显示,共享办公室的室内气候条件明显比私人办公室差,在灵活空间(OR = 1.72, 95 % CI: 1.41-2.09)和24人以上的办公室(OR = 1.57, 95 % CI: 1.27-1.93)的几率最高。自我报告的室内恶劣气候与呼吸道症状(OR = 2.17, 95 % CI: 1.74-2.27)和头痛(OR = 1.66, 95 % CI: 1.48 - 1.86)相关。办公室类型与健康结果之间没有直接关联;然而,中介分析表明,办公室类型通过室内气候对健康结果有显著的间接影响。相互作用分析进一步显示,在共享办公室中,较差的室内气候与呼吸道症状之间的关联在呼吸道症状(OR = 2.32 vs. OR = 1.80)和头痛(OR = 1.69 vs. OR = 1.44)方面都强于单间办公室。总之,本研究证明了办公室类型、感知到的室内气候和自我报告的健康结果之间的显著关联。虽然横断面设计限制了确定这些关联的方向或潜在机制的能力,但研究结果强调了办公室布局和室内气候质量在评估工作场所健康方面的相关性。
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引用次数: 0
Long-term impacts of energy retrofits on indoor air quality and climate – Follow-up results of a sample of Finnish apartment buildings 能源改造对室内空气质量和气候的长期影响——芬兰公寓楼样本的后续结果
Pub Date : 2025-08-13 DOI: 10.1016/j.indenv.2025.100116
Virpi Leivo , Minna Kempe , Ulla Haverinen-Shaughnessy
Energy retrofits can have an impact on indoor air quality and climate, particularly on temperature, humidity, and concentrations of air pollutants. Both positive and negative impacts have been identified, usually based on measurements taken quite soon (up to about one year) after the retrofits. We studied the long-term (about seven years) impacts of energy retrofits on indoor thermal conditions, ventilation rates, and CO2 and radon concentrations during heating season in 13 Finnish apartment buildings (42 apartments) along with the occupants’ self-reported satisfaction with IAQ. High indoor temperatures and low RH were recorded in all the measurements. There were no significant changes in the night-time average CO2 concentration (less than 700 ppm) and momentary air exchange rates (0.3–0.35 (dm3/s)/ m2) between the measurements. There was a decreasing trend in radon concentration. Seven years after the retrofit, the average radon concentration was 23 % lower than before the retrofit. Concentrations above 100 Bq/m3 were also less frequent after the retrofitting. According to the occupant questionnaire, the respondents were significantly more satisfied with IAQ about one year after the retrofits. About 7 years after the retrofit, they still appeared to be more satisfied with IAQ than before the retrofits.
能源改造会对室内空气质量和气候产生影响,特别是对温度、湿度和空气污染物的浓度。已经确定了积极和消极的影响,通常是根据改造后很快(最多一年左右)进行的测量。我们研究了能源改造对13栋芬兰公寓楼(42套公寓)采暖季室内热条件、通风率、二氧化碳和氡浓度的长期(约7年)影响,以及居住者对室内空气质量的自我报告满意度。所有的测量都记录了高室内温度和低相对湿度。夜间平均CO2浓度(低于700 ppm)和瞬时空气交换速率(0.3-0.35 (dm3/s)/ m2)在测量之间没有显著变化。氡浓度呈下降趋势。改造7年后,平均氡浓度比改造前降低了23% %。在改造后,浓度高于100 Bq/m3的情况也较少。根据住户问卷调查,被访者对室内空气质素的满意程度在楼宇改造约一年后显著提高。改造后大约7年,他们对室内空气质量仍然比改造前更满意。
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引用次数: 0
Levels, distribution, sources and children's health risk of PBDEs in household dust from 2010 to 2022 in China 2010 - 2022年中国家庭粉尘中多溴二苯醚的含量、分布、来源及儿童健康风险
Pub Date : 2025-08-05 DOI: 10.1016/j.indenv.2025.100114
Xiaotong Zhang , Wenying Zhang , Tingting Liu , Fengjing Song , Chengyu Chen , Chao Wang , Weiyi Zhang , Xu Han , Xianliang Wang

Background

Polybrominated biphenyl ethers (PBDEs) are one of the most common flame retardants in household products. Given their broad-spectrum toxicity, monitoring PBDE levels in indoor environments and assessing their potential health risks are critical for residential health risk management.

Methods

Based on published literature data from 2010 to 2022, the concrete raw data regarding the concentration of PBDEs in actual dust samples from true household living conditions in China were collected exhaustively from 26 peer-reviewed papers after screening. Congeners with detection rates exceeding 80 % (BDE-28, −47, −99, −100, −153, −154, −183, −209) were selected for further analysis. Household dust PBDE levels were quantified using the weighted average concentration. Seasonal and regional variations were evaluated using the Mann-Whitney U and Kruskal-Wallis H tests, while Spearman correlation analysis and exploratory factor analysis (EFA) were applied for source apportionment. Health risks to children were assessed based on estimated daily intake (EDI) via ingestion and dermal absorption, using hazard indices (HI) and carcinogenic risk (CR) models.

Results

The concentrations of PBDEs in household dust (HD-PBDEs)2 in China ranged from 4.03 ng/g to 37333.58 ng/g, with a weighted average concentration of 3625.43 ng/g. The weighted average concentration was maximum in Zhejiang (27268.66 ng/g) and lowest in Shaanxi (4.03 ng/g). BDE-209 was the predominant congener of HD-PBDEs, ranging from 73.56 % to 99.78 %, followed by BDE-47 (6.84–62.08 %), BDE-99 (1.80–56.77 %), and BDE-153 (0–43.10 %). The weighted average concentrations of ∑8PBDEs were 1419.97 ng/g in 2006–2009, 5886.15 ng/g in 2010–2014, and 1813.51 ng/g in 2015–2020. HD-PBDE concentration was significantly higher in winter than in spring and fall (P < 0.05). Families residing in rural areas, southern regions, or near e-waste-contaminated areas exhibited higher concentrations of HD-PBDEs (P < 0.05). Two principal components were extracted, accounting for 84.56 % of the total variance. The estimated daily intake of HD-PBDEs for children via ingestion (1.93 × 101 ng/kg BW/day) was higher than that via dermal absorption (8.93 ×10−1 ng/kg BW/day). The non-carcinogenic risk of HD-PBDEs (1.01 ×10−1) and the carcinogenic risk of BDE-209 (1.30 ×10−8) were below the standard criterion.

Conclusions

HD-PBDE concentrations in China ranked moderate-to-high globally, with clear regional variations. Both non-carcinogenic and carcinogenic risks of HD-PBDE exposure to Chinese children were acceptable. Future investigations should focus on longitudinal monitoring of PBDE trends in household environments and health impacts on vulnerable subpopulations.
多溴联苯醚(PBDEs)是家用产品中最常见的阻燃剂之一。鉴于多溴二苯醚的广谱毒性,监测室内环境中的多溴二苯醚水平并评估其潜在的健康风险对居民健康风险管理至关重要。方法基于2010 - 2022年已发表的文献数据,筛选26篇同行评议论文,详尽收集中国真实家庭生活条件下实际粉尘样本中多溴二苯醚浓度的具体原始数据。选择检出率超过80% %的同源基因(BDE-28, - 47, - 99, - 100, - 153, - 154, - 183, - 209)进行进一步分析。使用加权平均浓度对家庭粉尘多溴二苯醚水平进行量化。采用Mann-Whitney U检验和Kruskal-Wallis H检验评估季节和区域差异,采用Spearman相关分析和探索性因子分析(EFA)进行源分析。使用危害指数(HI)和致癌风险(CR)模型,根据通过摄入和皮肤吸收估计的每日摄入量(EDI)对儿童的健康风险进行评估。结果中国家庭粉尘中多溴二苯醚(HD-PBDEs)2的浓度范围为4.03 ng/g ~ 37333.58 ng/g,加权平均浓度为3625.43 ng/g。加权平均浓度以浙江最高(27268.66 ng/g),陕西最低(4.03 ng/g)。BDE-209是HD-PBDEs的优势同系物,分布范围为73.56 % ~ 99.78 %,其次是BDE-47(6.84 ~ 62.08 %)、BDE-99(1.80 ~ 56.77 %)和BDE-153(0 ~ 43.10 %)。2006-2009年∑8PBDEs的加权平均浓度为1419.97 ng/g, 2010-2014年为5886.15 ng/g, 2015-2020年为1813.51 ng/g。冬季HD-PBDE浓度显著高于春季和秋季(P <; 0.05)。居住在农村地区、南部地区或电子垃圾污染地区附近的家庭表现出更高的HD-PBDEs浓度(P <; 0.05)。提取两个主成分,占总方差的84.56 %。估计儿童每日通过食入摄入的多溴二苯醚(1.93 × 101 ng/kg BW/day)高于通过皮肤吸收(8.93 ×10−1 ng/kg BW/day)。HD-PBDEs的非致癌风险(1.01 ×10−1)和BDE-209的致癌风险(1.30 ×10−8)均低于标准标准。结论中国shd - pbde浓度在全球范围内处于中高水平,区域差异明显。中国儿童接触多溴二苯醚的非致癌性和致癌性风险均可接受。未来的调查应侧重于家庭环境中多溴二苯醚趋势的纵向监测以及对脆弱亚人群的健康影响。
{"title":"Levels, distribution, sources and children's health risk of PBDEs in household dust from 2010 to 2022 in China","authors":"Xiaotong Zhang ,&nbsp;Wenying Zhang ,&nbsp;Tingting Liu ,&nbsp;Fengjing Song ,&nbsp;Chengyu Chen ,&nbsp;Chao Wang ,&nbsp;Weiyi Zhang ,&nbsp;Xu Han ,&nbsp;Xianliang Wang","doi":"10.1016/j.indenv.2025.100114","DOIUrl":"10.1016/j.indenv.2025.100114","url":null,"abstract":"<div><h3>Background</h3><div>Polybrominated biphenyl ethers (PBDEs) are one of the most common flame retardants in household products. Given their broad-spectrum toxicity, monitoring PBDE levels in indoor environments and assessing their potential health risks are critical for residential health risk management.</div></div><div><h3>Methods</h3><div>Based on published literature data from 2010 to 2022, the concrete raw data regarding the concentration of PBDEs in actual dust samples from true household living conditions in China were collected exhaustively from 26 peer-reviewed papers after screening. Congeners with detection rates exceeding 80 % (BDE-28, −47, −99, −100, −153, −154, −183, −209) were selected for further analysis. Household dust PBDE levels were quantified using the weighted average concentration. Seasonal and regional variations were evaluated using the Mann-Whitney U and Kruskal-Wallis H tests, while Spearman correlation analysis and exploratory factor analysis (EFA) were applied for source apportionment. Health risks to children were assessed based on estimated daily intake (EDI) via ingestion and dermal absorption, using hazard indices (HI) and carcinogenic risk (CR) models.</div></div><div><h3>Results</h3><div>The concentrations of PBDEs in household dust (HD-PBDEs)<span><span><sup>2</sup></span></span> in China ranged from 4.03 ng/g to 37333.58 ng/g, with a weighted average concentration of 3625.43 ng/g. The weighted average concentration was maximum in Zhejiang (27268.66 ng/g) and lowest in Shaanxi (4.03 ng/g). BDE-209 was the predominant congener of HD-PBDEs, ranging from 73.56 % to 99.78 %, followed by BDE-47 (6.84–62.08 %), BDE-99 (1.80–56.77 %), and BDE-153 (0–43.10 %). The weighted average concentrations of ∑<sub>8</sub>PBDEs were 1419.97 ng/g in 2006–2009, 5886.15 ng/g in 2010–2014, and 1813.51 ng/g in 2015–2020. HD-PBDE concentration was significantly higher in winter than in spring and fall (<em>P</em> &lt; 0.05). Families residing in rural areas, southern regions, or near e-waste-contaminated areas exhibited higher concentrations of HD-PBDEs (<em>P</em> &lt; 0.05). Two principal components were extracted, accounting for 84.56 % of the total variance. The estimated daily intake of HD-PBDEs for children via ingestion (1.93 × 10<sup>1</sup> ng/kg BW/day) was higher than that via dermal absorption (8.93 ×10<sup>−1</sup> ng/kg BW/day). The non-carcinogenic risk of HD-PBDEs (1.01 ×10<sup>−1</sup>) and the carcinogenic risk of BDE-209 (1.30 ×10<sup>−8</sup>) were below the standard criterion.</div></div><div><h3>Conclusions</h3><div>HD-PBDE concentrations in China ranked moderate-to-high globally, with clear regional variations. Both non-carcinogenic and carcinogenic risks of HD-PBDE exposure to Chinese children were acceptable. Future investigations should focus on longitudinal monitoring of PBDE trends in household environments and health impacts on vulnerable subpopulations.</div></div>","PeriodicalId":100665,"journal":{"name":"Indoor Environments","volume":"2 3","pages":"Article 100114"},"PeriodicalIF":0.0,"publicationDate":"2025-08-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144780467","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Exposure risk and source analysis of toxic metal(loid)s in indoor dust of Eastern Nigeria during COVID-19 lockdown 2019冠状病毒病封锁期间尼日利亚东部室内粉尘中有毒金属(样物质)的暴露风险和来源分析
Pub Date : 2025-07-17 DOI: 10.1016/j.indenv.2025.100113
Chideraa Courage Offor , John Kanayochukwu Nduka , Henrietta Ijeoma Kelle
Outbreak and emergency occasioned by coronavirus virus disease forcefully led to imposition of lockdown in Nigeria; a situation that consequently exposed humans to heavy metal(loid)s laden dust. Hence, this study measured the concentration of heavy metal(loid)s in indoor dust from households of three selected semi-urban areas (Rumuodomaya-Ogale, Ekwulobia and Awka) of Eastern Nigeria. Dust samples (n = 144) were collected from household’s windows and floors using clean brush, filtered, digested by standard method and analyzed for Cd, Co, Ni, Hg, As, Mn, Al, Pb, Cr, Zn, and Fe using Atomic Absorption Spectrometry (Model: Varian AA240, USA). Results show that Fe was dominant when compared to other metals assessed. Whereas the total heavy metal(loid)s concentration (THMC) of the floor dusts was higher than that of window dusts from Ekwulobia, there was no significant difference (p > 0.05) in total heavy metal(loid)s level in window and floor dust of the three semi-urban areas across the months. Awka showed the least THMC in the window (1.17 – 1.52 mg kg−1) and floor (1.08 – 2.35 mg kg−1) dusts in comparison with Ekwulobia (window: 1.23 mg/kg to 9.05 mg kg−1; floor: 1.27 mg kg−1 to 9.22 mg kg−1) and Rumuodomaya-Ogale (window: 1.49 – 2.70 mg kg−1; floor: 1.24 – 2.23 mg kg−1). The cancer and non-cancer risk of exposure to the heavy metal(loid)s dusts was insignificant while most of the heavy metal(loid)s could be related to anthropogenic origin based on the Positive Matrix Factorization and Principal Component Analysis models.
冠状病毒病引发的疫情和紧急情况迫使尼日利亚实施封锁;这种情况导致人类暴露在重金属(类)粉尘中。因此,本研究测量了尼日利亚东部三个选定的半城市地区(Rumuodomaya-Ogale、Ekwulobia和Awka)家庭室内粉尘中重金属(loid)s的浓度。用干净的毛刷从家庭窗户和地板上收集粉尘样品(n = 144),过滤后用标准方法消化,用原子吸收光谱法分析Cd、Co、Ni、Hg、As、Mn、Al、Pb、Cr、Zn和Fe(型号:Varian AA240, USA)。结果表明,与其他金属相比,铁占主导地位。地尘中总重金属(loid)s浓度(THMC)高于窗尘,但3个半城市区域窗尘和窗尘中总重金属(loid)s浓度在各月份间无显著差异(p >; 0.05)。Awka在窗口粉尘(1.17 ~ 1.52 mg kg−1)和地板粉尘(1.08 ~ 2.35 mg kg−1)中THMC最低,而Ekwulobia在窗口粉尘(1.23 ~ 9.05 mg kg−1)中THMC最低;地板:1.27 mg kg−1至9.22 mg kg−1)和Rumuodomaya-Ogale(窗口:1.49 - 2.70 mg kg−1;地板:1.24 - 2.23 mg kg−1)。基于正矩阵分解和主成分分析模型,重金属粉尘暴露的致癌风险和非致癌风险均不显著,大部分重金属粉尘暴露与人为来源有关。
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引用次数: 0
Remediation of indoor environments impacted by wildfire smoke: A review of available information and research needs 受野火烟雾影响的室内环境的修复:对现有信息和研究需求的回顾
Pub Date : 2025-07-16 DOI: 10.1016/j.indenv.2025.100112
Hugo Destaillats, Wanyu R. Chan
There is growing interest in better understanding wildfire smoke contamination in the indoor environment, the associated human exposures and health impacts. Most efforts have been devoted to developing guidelines protecting occupants during a wildfire event, e.g., on the proper use of building ventilation and filtration. However, there is also a need to understand the long-term impacts of wildfires on indoor contamination, and which are the most effective mitigation options. We reviewed the scientific literature and additional available documentation to identify the main chemical contaminants found in buildings impacted by wildfire smoke. Polycyclic aromatic hydrocarbons (PAHs) and trace metals have been reported on indoor surfaces and dust after exposure to smoke, and are of particular concern due to the health effects associated with continuous exposures. Described mitigation approaches included cleaning using dry and wet media, vacuuming and ozonation. While little information is available on their effectiveness in long-term removal of wildfire smoke contaminants, similar remediation methods have been described to remove other types of persistent contamination indoors, including thirdhand tobacco smoke and mold, providing a reference to predict the expected efficacy and limitations of those methods. Gaps in the available information and research needs were identified to develop a research agenda addressing wildfire smoke’s persistent contamination and mitigation options.
人们对更好地了解室内环境中的野火烟雾污染、相关的人类暴露和健康影响越来越感兴趣。大多数努力都致力于制定在野火事件中保护居住者的指导方针,例如,正确使用建筑物通风和过滤。然而,还需要了解野火对室内污染的长期影响,以及哪些是最有效的缓解办法。我们回顾了科学文献和其他可用文件,以确定在受野火烟雾影响的建筑物中发现的主要化学污染物。多环芳烃(PAHs)和痕量金属已被报告在接触烟雾后的室内表面和灰尘上,由于持续接触对健康的影响,这些物质尤其令人关注。所描述的缓解方法包括使用干湿介质、真空和臭氧化进行清洁。虽然关于它们在长期去除野火烟雾污染物方面的有效性的信息很少,但已经描述了类似的补救方法来去除室内其他类型的持久性污染物,包括三手烟草烟雾和霉菌,为预测这些方法的预期功效和局限性提供了参考。确定了现有信息和研究需求方面的差距,以制定一项研究议程,解决野火烟雾的持续污染和缓解办法。
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引用次数: 0
Improving indoor air quality and mitigating health risks with sheep wool as a sustainable material 以羊毛为可持续材料,改善室内空气质量,降低健康风险
Pub Date : 2025-07-10 DOI: 10.1016/j.indenv.2025.100111
Katrin Kabun , Karin Reinhold
Sheep wool as a natural fiber is an increasingly important alternative to synthetic materials in the green economy. The study evaluates the effectiveness of sheep wool based materials in enhancing indoor air quality (IAQ) and mitigating health risks in occupational settings. Two test cabins - one with conventional synthetic materials and another with sheep wool based materials - were designed to compare the performance of these materials in terms of noise insulation, volatile organic compounds (VOC) emissions, CO2 levels and humidity regulation. A survey of the room occupants' perception of the material was also carried out. Results show that sheep wool panels provide sound insulation comparable to synthetic materials, especially at mid-range frequencies. Sheep wool's natural ability to regulate humidity contributed to a more stable indoor climate, while VOC levels remained low in both cabins, below the analytical determination limit for some parameters. The Synthetic cabin showed a slightly lower VOC level. The sheep wool cabin showed more rapid CO2 fluctuations, demanding further study. User surveys indicated a preference for the sheep wool cabin, with participants noting comfort and an overall more pleasant environment. This novel approach, which simultaneously measures IAQ indicators and examines the room users' perception of IAQ, shows that sheep wool based materials, being both sustainable and biodegradable, provide a healthier alternative to synthetic materials, supporting the goals of reducing health risks and promoting environmental sustainability.
羊毛作为一种天然纤维,在绿色经济中日益成为合成材料的重要替代品。该研究评估了羊毛基材料在提高室内空气质量(IAQ)和减轻职业环境中健康风险方面的有效性。设计了两个测试舱——一个使用传统合成材料,另一个使用羊毛材料——以比较这些材料在隔音、挥发性有机化合物(VOC)排放、二氧化碳水平和湿度调节方面的性能。对房间里的人对材料的看法也进行了调查。结果表明,羊毛板的隔音效果与合成材料相当,尤其是在中频范围内。羊毛调节湿度的天然能力有助于更稳定的室内气候,而两个小屋的VOC水平仍然很低,低于某些参数的分析测定极限。合成机舱显示出稍低的VOC水平。羊毛小屋显示出更快的二氧化碳波动,需要进一步研究。用户调查表明,他们更喜欢羊毛小屋,参与者注意到舒适和总体上更令人愉快的环境。这种新方法同时测量室内空气质量指标并检查房间用户对室内空气质量的感知,表明羊毛基材料既可持续又可生物降解,是合成材料的更健康替代品,有助于降低健康风险和促进环境可持续性的目标。
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引用次数: 0
An efficient method for fabricating nanofiber air filters with minimized pressure drop for effective indoor particle removal 一种制造具有最小压降的纳米纤维空气过滤器以有效去除室内颗粒的有效方法
Pub Date : 2025-07-09 DOI: 10.1016/j.indenv.2025.100110
Zhuolun Niu , Chun Chen
Electrospun nanofiber air filters can achieve high particle filtration efficiency with lower pressure drop compared with high-efficiency particulate air (HEPA) filters. Therefore, they can potentially be used for effective indoor particle removal. To support practical applications, this study proposed an efficient method for producing electrospun nanofiber air filters that achieve a minimized pressure drop while meeting the target particle filtration efficiency. Specifically, this method decoupled the influence of applied voltage and electrospinning time, enabling the identification of the optimal applied voltage to minimize pressure drop and the calculation of the electrospinning time needed to achieve the target filtration efficiency. Compared with the previous approach, this method eliminated the need to measure structural parameters, thereby significantly simplifying the optimization process. Experimental measurements were conducted to validate the feasibility of the proposed method. The results show that the proposed method can effectively achieve the target particle filtration efficiency with relative errors all less than 1% compared to the target values. Furthermore, the pressure drop of the optimized nanofiber air filters was up to 40.6% lower than that of the randomly selected filters in the verification cases. Finally, the benefits of using the optimized nanofiber air filters for indoor particle removal were numerically assessed. The results show that using the nanofiber air filters optimized by the proposed method in an air cleaner reduced indoor PM0.3–0.4 of outdoor origin in a typical public housing apartment in Hong Kong by up to 22.7% compared to the randomly selected nanofiber air filters.
与高效微粒空气过滤器(HEPA)相比,静电纺丝纳米纤维空气过滤器的压降更小,过滤效率更高。因此,它们可以潜在地用于有效的室内颗粒去除。为了支持实际应用,本研究提出了一种有效的方法来生产静电纺纳米纤维空气过滤器,在满足目标颗粒过滤效率的同时实现最小的压降。具体而言,该方法解耦了施加电压和静电纺丝时间的影响,从而确定了使压降最小的最佳施加电压,并计算了达到目标过滤效率所需的静电纺丝时间。与之前的方法相比,该方法不需要测量结构参数,从而大大简化了优化过程。实验结果验证了该方法的可行性。结果表明,该方法能有效地达到目标粒子过滤效率,与目标值的相对误差均小于1%。在验证工况下,优化后的纳米纤维空气过滤器的压降比随机选择的过滤器降低了40.6%。最后,采用优化后的纳米纤维空气过滤器对室内颗粒去除效果进行了数值评估。结果表明,与随机选择的纳米纤维空气过滤器相比,在香港典型公共住房公寓的空气净化器中使用该方法优化的纳米纤维空气过滤器可将室内PM0.3-0.4的室外来源减少22.7%。
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引用次数: 0
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Indoor Environments
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