Method using artificial freezing technique for sealing and displacement of soil pollutant

US10654082B2 · kind B2 · utility

Assignees

• China University of Mining and Technology · CN
• CHINA COAL CONTRUCTION GROUP LIMITED CORPORATION · CN

Inventors

• Jianzhou Wang · 安丰镇, CN
• Guoqing Zhou · 安丰镇, CN
• Jinhong Yang · Daejeon, KR
• Hengchang Liang · 安丰镇, CN
• Jie Yang · Foster City, US
• Tuo Chen · Shanghai, CN
• Guangsi Zhao · 安丰镇, CN
• Shuxing Liu · 安丰镇, CN
• Fengyuan Jiu · 安丰镇, CN
• Heng Zhou · Albion, US
• Haoxuan Zhang · 安丰镇, CN
• Dan Song · Chongqing, CN

Key dates

• Filing date: Dec 1, 2017
• Grant date: May 19, 2020
• Expiry date: Dec 1, 2037

Classification

• Technology area (CPC G): Physics
• CPC primary: G01N2001/4033
• WIPO field: Measurement
• WIPO sector: Instruments

Abstract

Disclosed is a method using an environmental-friendly and artificial freezing technique for sealing and displacement of a soil pollutant. The method for displacement of the soil pollutant comprises: performing an artificial freezing technique on an area and depth of a surveyed contaminated site to form a sealed frozen wall along the perimeter of the contaminated site, by using the excellent permeation resistance function of the frozen wall to seal the contaminated site and to prevent the pollutant from spreading further; selecting a freezing temperature of −10° C. to −30° C. according to characteristics of the freezing temperature and precipitation rate of the pollutant, by controlling the freezing rate to 1 cm/day to 10 cm/day, and performing freezing displacement of the soil pollutant from outside to inside using a principle of freezing purification, to concentrate the pollutant; and subjecting the remaining high concentration of contaminated soil to chemical treatment.