采用循环伏安法(CV)、线性扫描法(LSV)、计时电流法研究了超重力场(超重力系数和作用方向)对铅电沉积过程(包括欠电位沉积、本体沉积和析氢副反应)的影响.结果表明,Pb(NO3)2溶液中,在所有超重力条件下,铅的本体沉积和欠电位沉积均得到一定程度的强化,析氢副反应得到抑制;当超重力作用方向为垂直背向时(VBD),超重力对电沉积过程的强化程度最大;在超重力场中对废水中的铅进行电化学处理后,溶液中的残余Pb^2+浓度要远远小于常重力条件下的Pb^2+浓度.
The effects of super gravity field (super gravity coefficient and working direction) on the electrodeposition process of Pb (underpotential deposition, bulk deposition and hydrogen evolution reaction) were investigated by cyclic voltammetry (CV), linear sweep voltammetry (LSV) and chronoamperometry. Results indicated that, in Pb(NO3)2 aqueous solution, both the bulk deposition and the underpotential deposition of Pb^2+ can be intensified under all super gravity conditions and the hydrogen evolution reaction is depressed. When the working direction of super gravity is in the vertical-back-direction (VBD), the largest effect of super gravity on the electrodeposition process is achieved. After electrolytic removal of Pb^2+ from wastewater under super gravity field, the residual concentration of Pb^2+ was much lower than that under the normal gravity condition.