| Title: | Soil washing for the remediation of dioxin-contaminated soil: A review |
| Author(s): | Tran HT; Lin C; Hoang HG; Bui XT; Le VG; Vu CT; |
| Address: | "Department of Marine Environmental Engineering, National Kaohsiung University of Science and Technology, Kaohsiung 81157, Taiwan, ROC. Department of Marine Environmental Engineering, National Kaohsiung University of Science and Technology, Kaohsiung 81157, Taiwan, ROC. Electronic address: ctlin@nkust.edu.tw. Faculty of Health Sciences and Finance - Accounting, Dong Nai Technology University, Bien Hoa, Dong Nai 76100, Viet Nam. Key Laboratory of Advanced Waste Treatment Technology, Vietnam National University Ho Chi Minh (VNU-HCM), Linh Trung Ward, Thu Duc City, Ho Chi Minh City 700000, Viet Nam; Faculty of Environment and Natural Resources, Ho Chi Minh City University of Technology (HCMUT), Ho Chi Minh City 700000, Viet Nam. Department of Chemical Engineering, National Cheng Kung University, Tainan 701, Taiwan, ROC. Civil and Environmental Engineering Department, University of Alabama in Huntsville, Huntsville, AL 35899, United States" |
| DOI: | 10.1016/j.jhazmat.2021.126767 |
| ISSN/ISBN: | 1873-3336 (Electronic) 0304-3894 (Linking) |
| Abstract: | "Dioxin-contaminated soil has attracted worldwide attention due to its potential negative impacts on human health and the ecosystem. Thus, technological development aiming at high treatment efficiency and low cost for dioxin-contaminated soil is largely needed. In this review, approximately 200 documents were involved to summarize up-to-date scientific achievements of soil washing technology for the remediation of dioxin-contaminated soil. The mechanisms, advantages, and limitations of physical separation techniques (e.g. mechanical stirring, mechanical shaking, ultrasonication, and froth flotation) and washing solutions (e.g. organic solvents, edible oils, and surfactants) used for chemical extraction were comprehensively reviewed. Froth flotation is very promising for field-scale soil washing, whereas organic solvents show high removal efficiencies (up to 99%) of dioxins from contaminated soil. Further, the combination of physical separation and chemical extraction can help enhance dioxin removal efficiency (from 1.5 to 2 times), reducing energy consumption and cost (about 2 times). Among available remediation technologies for dioxin-contaminated soil, soil washing is truly promising since it has shown high removal efficiency (66-99% different remediation scales) with reasonable cost (46 - 250 USD per metric ton). However, the washed solution and volatile organic compounds generated during the process remain a concern and should be addressed in future research" |
| Keywords: | *Dioxins Ecosystem Humans *Polychlorinated Dibenzodioxins/analysis Soil *Soil Pollutants/analysis Chemical extraction Physical separation Polychlorinated dibenzo-p-dioxins and dibenzofurans Solvents Surfactants Treatment cost; |
| Notes: | "MedlineTran, Huu Tuan Lin, Chitsan Hoang, Hong Giang Bui, Xuan Thanh Le, Van Giang Vu, Chi Thanh eng Review Netherlands 2021/08/17 J Hazard Mater. 2022 Jan 5; 421:126767. doi: 10.1016/j.jhazmat.2021.126767. Epub 2021 Jul 30" |
