The curve of ion exchange ratio(%)-pH of the interaction between suspended particles with Cd(II) in

• 作 者: Yang Hong-wei Jiao Xiao-bao Guo Bo-shu Yang Yu-ying Song Zhi-xiang
• 机 构: Institute of Environmental Chemistry, Inner Mongolia Normal University, Hohhot 010022, China;Departm
• 出 处: 环境科学
• 发表日期: 1998年2期
• 关键词: liquid-solid interaction cadmium ion exchange technique curve of ion exchange ra

The curve of ion exchange ratio(%)-pH of the interactionbetween suspended particles with Cd(II) in the Yellow River wasstudied. The effects of lysine on this curve have been alsoinvestigated. The results showed that (1) Cadmium in Cd(OH)+ formin the suspended particles exchanges with the cations.The exchangeratio of Cd2+ is nearly at its greatest value in the range of pH(8.0-8.5) in natural aquatic system; (2) Ion exchange ratiodecreases as the concentration of Cd2+ raises from 8.9×10-6 mol/L to 2x8.9 x 10-6mol/L; (3) At the lysine concentration of 6.8x10-6 mol/L, it can promote the ion exchange ratio; (4) Adsorption of thesuspended particles to cadmium is weaker in seawater and Jin ShaRiver than in the Yellow River.