Kang Seungkoo, Liang Huayan, Qian Yong, Qi Chaolong
Centers for Disease Control and Prevention, National Institute for Occupational Safety and Health, Division of Field Studies and Engineering, 1090 Tusculum Ave, MS: R5, Cincinnati, OH 45226, USA.
Centers for Disease Control and Prevention, National Institute for Occupational Safety and Health, Health Effects Laboratory Division, 1095 Willowdale Rd, Morgantown, WV, 26505, USA.
Aerosol Air Qual Res. 2021 Feb;21(2). doi: 10.4209/aaqr.2020.07.0377. Epub 2020 Sep 29.
Laboratory tests were conducted to characterize the composition of emissions from sanding Corian, a solid-surface composite material mainly composed of alumina trihydrate (ATH) and acrylic polymer. Three sandpaper materials (ceramic, silicon carbide, and aluminum oxide) were tested to distinguish the contribution of aluminum-containing dust in the emission from Corian and sandpaper itself. The result can help identify the main cause of the pulmonary fibrosis from exposure to aluminum-containing dust while sanding Corian. Airborne dust samples were measured using direct-reading instruments and collected using a Micro-Orifice Uniform Deposit Impactor (MOUDI) for estimating the normalized dust generation rate. The size-classified dust samples from MOUDI were analyzed for elemental aluminum content. Additionally, air samples were analyzed for characterizing methyl methacrylate (MMA). The results from the direct-reading instruments reveal that the size distribution of particulate from sanding Corian differs from that of sawing Corian, showing that the size distribution of dust is affected by the fabrication process. The normalized respirable dust generation rate indicates that more respirable dust was generated during sanding Corian board. However, the use of aluminum oxide sandpaper does not result in a higher aluminum content in the respirable dust from sanding Corian, suggesting that the aluminum content of the respirable dust is primarily originated from Corian itself. The generation rates of MMA from sanding did not vary much among all types of sandpapers, and they were much lower than that of sawing, likely due to the higher temperature in the sawing process.
进行了实验室测试，以表征打磨可丽耐（一种主要由三水合氧化铝（ATH）和丙烯酸聚合物组成的实体表面复合材料）时排放物的成分。测试了三种砂纸材料（陶瓷、碳化硅和氧化铝），以区分可丽耐和砂纸本身排放物中含铝粉尘的贡献。该结果有助于确定打磨可丽耐时接触含铝粉尘导致肺纤维化的主要原因。使用直读仪器测量空气中的粉尘样本，并使用微孔均匀沉积冲击器（MOUDI）收集样本，以估算标准化粉尘产生率。对MOUDI收集的按粒径分类的粉尘样本进行元素铝含量分析。此外，对空气样本进行分析以表征甲基丙烯酸甲酯（MMA）。直读仪器的结果表明，打磨可丽耐产生的颗粒物粒径分布与锯切可丽耐不同，这表明粉尘的粒径分布受制造工艺影响。标准化可吸入粉尘产生率表明，打磨可丽耐板时产生的可吸入粉尘更多。然而，使用氧化铝砂纸并不会导致打磨可丽耐产生的可吸入粉尘中铝含量更高，这表明可吸入粉尘中的铝含量主要源自可丽耐本身。打磨过程中MMA的产生率在所有类型的砂纸中变化不大，且远低于锯切过程中的产生率，这可能是由于锯切过程中温度较高。
