Polyacrylate/kaolin hydrogel composite was prepared via ultrasonic irradiation using various crosslinking agent contents (N, N'-Methylenebisacrylamide (MBA)) and characterized using X-ray diffraction (XRD), Fourier transform infrared spectroscopy (FTIR), scanning electron microscopy (SEM), and Brunauer Emmett and Teller (BET) method.Moreover, heavy metals adsorption was investigated using syntheti...