Fig. 2
From: Evaluating the efficiency of formaldehyde degradation from aqueous environment by sonozone technique
Results of US effect in removing formaldehyde from contaminated water 110, 220, and 330 mg/L in different (a) pHs (3, 7, and 11), (b) electrical powers (50, 100, and 150 W), and (c) times (8, 16, 32 min).
