Experimental evidence for a significant contribution of cellulose to indoor aerosol mass concentration
Experimental evidence for a significant contribution of cellulose to indoor aerosol mass concentration
复制标题
DOI：
10.1016/j.atmosenv.2009.11.043
复制
发表时间：
2010-02-01
影响因子：
5
通讯作者：
Pio, Casimiro
中科院分区：
文献类型：
--
作者：
Cerqueira, Mario;Marques, Daniel;Pio, Casimiro
选择位于阿韦罗（葡萄牙）住宅区的公寓卧室，目的是表征室内气溶胶颗粒的纤维素含量。采集了两组样品：（1）同时采集室内和室外空气中的PM（10）;（2）同时采集室内空气中的PM（10）和PM（2.5）。气溶胶颗粒在石英纤维过滤器上浓缩，过滤器配有低容量空气采样器。尺寸选择性入口。称重过滤器，然后通过酶法3提取用于纤维素分析。平均室内纤维素浓度为1.01 +/- 0.24 μ g m（-3），而平均室外纤维素浓度为0.078 +/- 0.047 μ g m（-3），分别占PM（10）质量的4.0%和0.4%。室内和室外纤维素浓度之间的相应平均比值为11.1 +/- 4.9，表明纤维素颗粒是在室内产生的，最有可能是由于在卧室进行日常活动时处理棉制纺织品所致。室内纤维素浓度在气溶胶粗粒级中平均为1.22 +/- 0.53 μ g m（-3）（根据PM（10）和PM（2.5）浓度之间的差异确定），在气溶胶细粒级中平均为0.38 +/- 0.13 μ g m（-3）。室内空气中纤维素浓度的粗级分和细级分之间的平均比率为3.6 +/- 2.1。该比例与该生物聚合物的主要来源一致。这项研究的结果提供了第一个实验证据，支持纤维素对室内空气中悬浮颗粒物质量的重要贡献。(C)2009爱思唯尔有限公司保留所有权利。
An apartment bedroom located in a residential area of Aveiro (Portugal) was selected with the aim of characterizing the cellulose content of indoor aerosol particles. Two sets of samples were taken: (1) PM(10) collected simultaneously in indoor and outdoor air; (2) PM(10) and PM(2.5) collected simultaneously in indoor The aerosol particles were concentrated on quartz fibre filters with low-volume samplers equipped with air. size selective inlets. The filters were weighed and then extracted for cellulose analysis by an enzymatic 3 method. The average indoor cellulose concentration was 1.01 +/- 0.24 mu g m(-3), whereas the average outdoor cellulose concentration was 0.078 +/- 0.047 mu g m(-3), accounting for 4.0% and 0.4%, respectively, of the PM(10) mass. The corresponding average ratio between indoor and outdoor cellulose concentrations was 11.1 +/- 4.9, indicating that cellulose particles were generated indoors, most likely due to the handling of cotton-made textiles as a result of routine daily activities in the bedroom. Indoor cellulose concentrations averaged 1.22 +/- 0.53 mu g m(-3) in the aerosol coarse fraction (determined from the difference between PM(10) and PM(2.5) concentrations) and averaged 0.38 +/- 0.13 mu g m(-3) in the aerosol fine fraction. The average ratio between the coarse and fine fractions of cellulose concentrations in the indoor air was 3.6 +/- 2.1. This ratio is in line with the primary origin of this biopolymer. Results from this study provide the first experimental evidence in support of a significant contribution of cellulose to the mass of suspended particles in indoor air. (C) 2009 Elsevier Ltd. All rights reserved.