Статья

High-temperature electrothermal remediation of multi-pollutants in soil

Bing DengDepartment of Chemistry, Rice University, Houston, TX, 77005, USA. [email protected]Robert A. CarterDepartment of Chemistry, Rice University, Houston, TX, 77005, USAYi ChengDepartment of Chemistry, Rice University, Houston, TX, 77005, USAYuan LiuDepartment of BioSciences, Rice University, Houston, TX, 77005, USALucas EddyApplied Physics Program, Rice University, Houston, TX, 77005, USAKevin M. WyssDepartment of Chemistry, Rice University, Houston, TX, 77005, USAMine G. Ucak‐AstarliogluGeotechnical and Structures Laboratory, U.S. Army Engineer Research & Development Center, Vicksburg, MS, 39180, USADuy Xuan LuongApplied Physics Program, Rice University, Houston, TX, 77005, USAXiaodong GaoCarbon Hub, Rice University, Houston, TX, 77005, USAKhalil JeBaileyDepartment of Materials Science and NanoEngineering, Rice University, Houston, TX, 77005, USACarter KittrellDepartment of Chemistry, Rice University, Houston, TX, 77005, USAShichen XuDepartment of Chemistry, Rice University, Houston, TX, 77005, USADebadrita JanaDepartment of Earth, Environmental, & Planetary Sciences, Rice University, Houston, TX, 77005, USAMark A. TorresDepartment of Earth, Environmental, & Planetary Sciences, Rice University, Houston, TX, 77005, USAJanet BraamDepartment of BioSciences, Rice University, Houston, TX, 77005, USAJames M. TourDepartment of Chemistry, Rice University, Houston, TX, 77005, USA. [email protected]

2023en

ABI

Аннотация

Soil contamination is an environmental issue due to increasing anthropogenic activities. Existing processes for soil remediation suffer from long treatment time and lack generality because of different sources, occurrences, and properties of pollutants. Here, we report a high-temperature electrothermal process for rapid, water-free remediation of multiple pollutants in soil. The temperature of contaminated soil with carbon additives ramps up to 1000 to 3000 °C as needed within seconds via pulsed direct current input, enabling the vaporization of heavy metals like Cd, Hg, Pb, Co, Ni, and Cu, and graphitization of persistent organic pollutants like polycyclic aromatic hydrocarbons. The rapid treatment retains soil mineral constituents while increases infiltration rate and exchangeable nutrient supply, leading to soil fertilization and improved germination rates. We propose strategies for upscaling and field applications. Techno-economic analysis indicates the process holds the potential for being more energy-efficient and cost-effective compared to soil washing or thermal desorption.

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Идентификаторы

DOI: 10.1038/s41467-023-41898-z

Цитирования и источники

Цитирований: 2Использованных источников: 0

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