使用树皮生物炭修复室内空气:颗粒大小和污染物浓度的影响

IF 4.3 2区 环境科学与生态学 Q1 CONSTRUCTION & BUILDING TECHNOLOGY
Indoor air Pub Date : 2024-04-16 DOI:10.1155/2024/1537588
Mariem Zouari, Silvo Hribernik, Matthew Schwarzkopf
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引用次数: 0

摘要

随着人们对室内空气质量和公共健康的日益重视,对高效且经济实惠的空气净化技术的需求也在不断增长。本研究考察了生物炭颗粒大小对其吸附空气中污染物效率的影响。通过研磨或球磨处理树皮提取的生物炭颗粒,然后分离出七个不同粒度组的样品。对生物炭颗粒进行了粒度、近似物、扫描电镜、X射线衍射和物理吸附分析。在吸附效率方面,以不同的初始浓度对两种不同的污染物进行了测试。不同粒度的生物炭的物理成分和 XRD 图样具有可比性。但球磨样品除外,因为它的灰分含量较高,并且出现了额外的 XRD 峰,表明样品受到了污染。颗粒越小,生物炭的孔隙率越大。球磨使比表面积和总孔隙度分别增加了 102% 和 48%。在其他样品中,粒度较细的生物炭对甲醛和甲醇的吸附潜力最高。需要强调的是,在减小生物炭粒度时,最好采用简单的机械研磨,以避免最终污染的风险、更高的能耗以及与球磨相关的更慢的处理过程。在测试低浓度污染物(百万分之 1 的甲醛)时,粒度对吸附效率的影响更为明显。然而,当测试的污染物浓度较高时,颗粒大小的影响就不那么明显了。较小的生物炭颗粒(小于 100 微米)对建筑物内低浓度挥发性有机化合物的吸附效率更高,因此更有利于室内空气治理。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Indoor Air Remediation Using Biochar from Bark: Impact of Particle Size and Pollutant Concentration

The growing emphasis on indoor air quality and public health is fuelling the need for efficient yet affordable air purification techniques. In this study, the influence of biochar particle size on its adsorption efficiency toward airborne pollutants was examined. Bark-derived biochar particles were treated by grinding or ball milling, and then, seven samples with different particle size groups were separated. Biochar particles were characterized by particle size, proximate, SEM, XRD, and physisorption analyses. For adsorption efficiency, two different pollutants were tested at variable initial concentrations. The physical composition and XRD patterns of the biochar with different particle sizes were comparable. The ball-milled sample was an exception in that it had higher ash content and additional XRD peaks signifying contamination of the sample. The porosity of biochar was greater in smaller particles. Ball milling increased the specific surface area and total pore volume by 102% and 48%, respectively. Biochar with finer particle size exhibited the highest adsorption potential towards formaldehyde and methanol among other samples. It should be emphasized that simple mechanical grinding is preferred for reducing biochar size to avoid the risk of eventual contamination, greater energy consumption, and slower processing related to ball milling. When a low concentration of pollutant was tested (1 ppm formaldehyde), the effect of particle size on the adsorption efficiency was more noticeable. However, the effect of particle size was less dominant when higher concentrations of pollutants were tested. Smaller biochar particles (<100 μm) are more favourable for indoor air remediation given their superior adsorption efficiency of volatile organic compounds occurring at low concentrations in the buildings.

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来源期刊
Indoor air
Indoor air 环境科学-工程:环境
CiteScore
10.80
自引率
10.30%
发文量
175
审稿时长
3 months
期刊介绍: The quality of the environment within buildings is a topic of major importance for public health. Indoor Air provides a location for reporting original research results in the broad area defined by the indoor environment of non-industrial buildings. An international journal with multidisciplinary content, Indoor Air publishes papers reflecting the broad categories of interest in this field: health effects; thermal comfort; monitoring and modelling; source characterization; ventilation and other environmental control techniques. The research results present the basic information to allow designers, building owners, and operators to provide a healthy and comfortable environment for building occupants, as well as giving medical practitioners information on how to deal with illnesses related to the indoor environment.
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