title: Impact of ultrasonic time on hot water elution of severely biodegraded heavy oil from weathered soils.
authors.affiliation: Key Laboratory of Water and Sediment Sciences, Ministry of Education, Department of Environmental Engineering, Peking University, Beijing, 100871, China. jiguodong@iee.pku.edu.cn
authors.forename: Guodong
authors.initials: G
authors.lastname: Ji
authors.forename: Xin
authors.initials: X
authors.lastname: Sui