College of Water Sciences, Beijing Normal University, Beijing 100875, China.
State Key Laboratory of Environmental Criteria and Risk Assessment, Chinese Research Academy of Environmental Sciences, Beijing 100012, China.
Int J Environ Res Public Health. 2022 Dec 8;19(24):16504. doi: 10.3390/ijerph192416504.
After thermal desorption, the total amount of heavy metals (HMs) is enriched in baghouse filter dust. To further understand the related environmental impact, the leaching characteristics under various conditions must be explored. Therefore, this study aimed to examine the leaching characteristics of seven HMs in the dust generated in the direct-fired thermal desorption process and to compare the differences in heavy metal leaching characteristics in the soil before and after thermal desorption. The leaching characteristics and bioaccessibility of seven HMs-arsenic (As), cadmium (Cd), chromium (Cr), copper (Cu), lead (Pb), nickel (Ni), and zinc (Zn)-were analyzed in dust and in soil before and after thermal desorption. The activity of HMs in dust was strong. Therefore, environmental effects and effects on human health should be considered in the treatment of soil and dust after thermal desorption.
热解吸后，重金属（HM）总量在袋式除尘器粉尘中富集。为了进一步了解相关的环境影响，必须探索各种条件下的浸出特性。因此，本研究旨在研究直接热解吸过程中产生的粉尘中七种 HM 的浸出特性，并比较热解吸前后土壤中重金属浸出特性的差异。分析了热解吸前后土壤和粉尘中七种重金属（砷（As）、镉（Cd）、铬（Cr）、铜（Cu）、铅（Pb）、镍（Ni）和锌（Zn））的浸出特性和生物可利用性。粉尘中 HM 的活性很强。因此，在热解吸后处理土壤和粉尘时，应考虑对环境的影响和对人类健康的影响。
