Bourliva Anna, Kelepertzis Efstratios, Papadopoulou Lamprini, Patinha Carla, Kantiranis Nikolaos
Directorate of Secondary Education of Western Thessaloniki, 56430 Thessaloniki, Greece.
Department of Geology and Geoenvironment, National and Kapodistrian University of Athens, Panepistimiopolis, Zographou, 15784 Athens, Greece.
Toxics. 2023 Apr 10;11(4):358. doi: 10.3390/toxics11040358.
Inorganic arsenic (As), a carcinogenic element to humans, is among the most dangerous and flammable substances that coal-burning plants could release. When coal is burned, large portions of arsenic are captured on fly-ash (FA) particles, but it could also contribute significantly to stack emissions of fine fly-ash particles. The aim of this study was to evaluate the oral and respiratory bioaccessibility of arsenic in lignite fly-ash (LFA) samples, and their contribution to total As exposure. Arsenic bioaccessibility fractions via ingestion and inhalation showed significant differences, suggesting the presence of highly soluble As-bearing phases in the studied LFA samples. The bioaccessible As fractions (BAF%) in the simulated gastric fluids (UBM protocol, ISO 17924:2018) showed a range of 45-73%, while the pulmonary bioaccessibility rates in the simulated lung fluid (artificial lung fluid (ALF)) exhibited significantly enhanced levels ranging from 86% to 95%. The obtained arsenic bioaccessibility rates were compared with previous data for multiple environmental matrices such as soil and dust-related materials, revealing that LFA exhibited significantly higher bioaccessibility (%) for the inhalation pathway.
无机砷（As）是一种对人类有致癌性的元素，是燃煤电厂可能释放的最危险且易燃的物质之一。煤燃烧时，大部分砷会附着在飞灰（FA）颗粒上，但它也可能对细飞灰颗粒的烟囱排放有显著贡献。本研究的目的是评估褐煤飞灰（LFA）样品中砷的经口和经呼吸道生物可及性，以及它们对总砷暴露的贡献。通过摄入和吸入途径的砷生物可及性分数显示出显著差异，这表明在所研究的LFA样品中存在高溶解性的含砷相。在模拟胃液（UBM方案，ISO 17924:2018）中的生物可及性砷分数（BAF%）范围为45% - 73%，而在模拟肺液（人工肺液（ALF））中的肺部生物可及率则显著提高，范围为86%至95%。将获得的砷生物可及率与之前关于土壤和粉尘相关材料等多种环境基质的数据进行比较，结果表明LFA在吸入途径方面表现出显著更高的生物可及性（%）。
