Leaching Characteristics of Heavy Metals in the Baghouse Filter Dust from Direct-Fired Thermal Desorption of Contaminated Soil

Panpan Wang, Yunzhe Cao (), Bin Yang, Huilong Luo, Tian Liang, Jingjing Yu, Aizhong Ding, Lina Wang, Huiying Li, Hanlin Cao, Fujun Ma, Qingbao Gu and Fasheng Li ()
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Panpan Wang: College of Water Sciences, Beijing Normal University, Beijing 100875, China
Yunzhe Cao: Technical Centre for Soil, Agriculture and Rural Ecology and Environment, Ministry of Ecology and Environment, Beijing 100012, China
Bin Yang: Technical Centre for Soil, Agriculture and Rural Ecology and Environment, Ministry of Ecology and Environment, Beijing 100012, China
Huilong Luo: College of Water Sciences, Beijing Normal University, Beijing 100875, China
Tian Liang: College of Water Sciences, Beijing Normal University, Beijing 100875, China
Jingjing Yu: College of Water Sciences, Beijing Normal University, Beijing 100875, China
Aizhong Ding: College of Water Sciences, Beijing Normal University, Beijing 100875, China
Lina Wang: School of Chemical and Environmental Engineering, China University of Mining and Technology, Beijing 100083, China
Huiying Li: Technical Centre for Soil, Agriculture and Rural Ecology and Environment, Ministry of Ecology and Environment, Beijing 100012, China
Hanlin Cao: Technical Centre for Soil, Agriculture and Rural Ecology and Environment, Ministry of Ecology and Environment, Beijing 100012, China
Fujun Ma: State Key Laboratory of Environmental Criteria and Risk Assessment, Chinese Research Academy of Environmental Sciences, Beijing 100012, China
Qingbao Gu: State Key Laboratory of Environmental Criteria and Risk Assessment, Chinese Research Academy of Environmental Sciences, Beijing 100012, China
Fasheng Li: College of Water Sciences, Beijing Normal University, Beijing 100875, China

IJERPH, 2022, vol. 19, issue 24, 1-12

Abstract: 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.

Keywords: thermal desorption; baghouse filter dust; heavy metal; leaching behavior; soil; environmental effects (search for similar items in EconPapers)
JEL-codes: I I1 I3 Q Q5 (search for similar items in EconPapers)
Date: 2022
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