Journal
INTERNATIONAL JOURNAL OF ENVIRONMENTAL RESEARCH AND PUBLIC HEALTH
Volume 15, Issue 8, Pages -Publisher
MDPI
DOI: 10.3390/ijerph15081731
Keywords
soil remediation; calcination; heavy metals; polycyclic aromatic hydrocarbons; co-contamination
Funding
- National R&D Plan Key Projects, China [2016YFD0800203]
- Jiangsu Provincial Key Research and Development Plan, China [BE2015682]
- National Natural Science Foundation of China [41771523]
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Co-contaminated soils containing heavy metals and polycyclic aromatic hydrocarbons (PAHs) are an environmental and human health risk. Research into the remediation of these soils is imperative. In this paper, a novel investigation utilizing calcination technique to stabilize heavy metals and simultaneously remove PAHs in soil was conducted. Calcination temperature (300-700 degrees C) was observed to play a dominant role in heavy metal stabilization and PAH removal in soils. However, calcination time (0.5-8 h) had no significant effect on these contaminants during calcination at different temperatures. Considering the remediation cycle requirements and economic costs of engineering, we suggested that the optimal calcination condition for Zn, Cu, naphthalene, and fluoranthene was at 700 degrees C for 0.5 h, and the corresponding stabilization or removal efficiency values were 96.95%, 98.41%, 98.49%, and 98.04%, respectively. Results indicate that calcination as a remedial strategy exhibits a bright future for practical applications in the simultaneous stabilization of heavy metals and PAH removal from co-contaminated sites.
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