AI Article Synopsis
- Respirable fine-grained fly ash (RFA) from power plants is poorly captured by air purification devices, raising concerns about health risks due to its fine particle size and toxic composition.
- Study analyzed the concentration and risk effects of trace elements in RFA of varying sizes (8-13 µm), finding that smaller particle sizes posed higher chronic and carcinogenic risk levels.
- Key factors influencing health risks included the weight of exposed individuals, trace element concentration, and ingestion rate, with specific trace elements (like arsenic and nickel) identified as having the most significant ecological impacts.
Article Abstract
Respirable fine-grained fly ash (RFA) is captured very inefficiently by existing air purification devices of power plant, leading to increasing concerns regarding their migration and subsequent interaction with body due to fine particle size and its complex toxic composition. Trace elements of RFA in three groups with five different sizes between 8-13 µm were analyzed in terms of available concentration, speciation and risk effects. The concentration, pollution level and ecological risk level of elements in RFA were related to particle sizes. Chronic non-carcinogenic effect risk (NER) and carcinogenic effect risk (CER) were negatively correlated with particle size. The individual weight of exposed subjects, corresponding trace elements concentration and ingestion rate in RFA were three significant variables influencing CER. NER and CER had a tenfold exaggerated effect when calculated using total element concentration of RFA. In addition to individual differences and exposure conditions, trace element properties, speciation and available concentration were the dominant factor responsible for ecological and environmental effects of trace elements in RFA, following the order As>Ni, Mn>Cr>Pb>Cu>Zn. Results of this work highlight the effects and differences of trace elements in RFA on ecology and health, and provide a basis for further pollution control and human health warning.
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| http://dx.doi.org/10.1016/j.jhazmat.2023.133387 | DOI Listing |
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