“…The published results on ultrasonic oil sand extraction are listed in Table 1 . According to current literature, Sadeghi et al did the first systematic study on oil sand extraction using ultrasound in the 1980s and 1990s [49] , [50] . Mason et al proposed two mechanisms of power ultrasound for soil cleaning (abrasion of soil particles and leaching of entrenched particles) [51] and a leaching model [52] .…”