▎ 摘　　要

Water contamination by heavy metals is a serious environmental concern. To unravel the "species resolved " interaction mechanism of heavy metals with graphene oxide (GO), a multi-aspects analyses incorporating metal species distribution, GO surface charge, adsorption behavior and fitting, hard-soft acid-base (HSAB) theory, Fourier transformation infrared spectroscopy and X-ray photoelectron spectroscopy were performed. For pH 7 and T = 25 C, adsorptions of aqueous Cd(II) and Pb(II) with equal initial concentrations of 300 mg L-1 by GO at 500 mg L-1 equilibrated in 15 min. The corresponding adsorption percentage and quantity for Cd(II) were 98.04% and 588.22 mg g(-1) and those for Pb(II) were 92.10% and 552.56 mg g(-1). When pH