CAS Key Laboratory of Crust-Mantle Materials and Environment, School of Earth and Space Sciences, University of Science and Technology of China, Hefei, Anhui, 230026, China; State Key Laboratory of Loess and Quaternary Geology, Institute of Earth Environment, The Chinese Academy of Sciences, Xi'an, Shaanxi, 710075, China; State Key Laboratory of Marine Pollution (SKLMP), Department of Chemistry, City University of Hong Kong, Hong Kong, SAR, China; Suzhou Institute for Advanced Study, University of Science and Technology of China, Suzhou, Jiangsu, 215123, China.
CAS Key Laboratory of Crust-Mantle Materials and Environment, School of Earth and Space Sciences, University of Science and Technology of China, Hefei, Anhui, 230026, China; State Key Laboratory of Loess and Quaternary Geology, Institute of Earth Environment, The Chinese Academy of Sciences, Xi'an, Shaanxi, 710075, China.
Chemosphere. 2022 Sep;302:134864. doi: 10.1016/j.chemosphere.2022.134864. Epub 2022 May 7.
The harm caused by indoor dust has received increasing attention in recent years. However, current studies have ignored comparisons with the corresponding outdoor dust. This study aimed to investigate the distribution of heavy metals in indoor and corresponding outdoor dust and the ecological and health risks they pose in Hefei, Central China. We analyzed O/I (outdoor/indoor concentration ratios) values, background comparison, and correlation analysis (heavy metal concentrations vs. particle size) and found that Cu, Zn, and Cd mainly existed in indoor sources, while V, Co, and As mainly existed in outdoor sources, and both family sizes and floor number influenced the variation of O/I. Through a new potential ecological risk assessment method, we determined that Cd risk levels in indoor and outdoor dust were extreme and high to extreme, respectively. Additionally, the carcinogenic risks of Ni, As, and Cr were not negligible. The risk of indoor dust was higher than that of outdoor dust for the heavy metals studied, implying a poor indoor environment. Notably, indoor dust from families with smaller sizes, lower floors, and smokers had higher ecological and carcinogenic risks.
近年来，室内灰尘造成的危害受到越来越多的关注。然而，目前的研究忽略了与相应的室外灰尘进行比较。本研究旨在调查中国中部合肥市室内和相应室外灰尘中重金属的分布情况，以及它们所带来的生态和健康风险。我们分析了 O/I（室外/室内浓度比）值、背景比较和相关性分析（重金属浓度与粒径的关系），结果发现 Cu、Zn 和 Cd 主要来源于室内源，而 V、Co 和 As 主要来源于室外源，家庭规模和楼层数均会影响 O/I 的变化。通过一种新的潜在生态风险评估方法，我们确定室内和室外灰尘中 Cd 的风险级别分别为极高和高到极高。此外，Ni、As 和 Cr 的致癌风险不容忽视。与所研究的重金属相比，室内灰尘的生态和致癌风险更高，这意味着室内环境较差。值得注意的是，家庭规模较小、楼层较低和吸烟者的室内灰尘具有更高的生态和致癌风险。
