电容去离子化去除地下水中镉的影响因素

doi:10.13278/j.cnki.jjuese.20170334

Abstract

Abstract: By using high-surface-area activated carbon as adsorbent manufacturing electrode, the authors studied the effects of capacitive deionization for cadmium removal from groundwater, and discussed the influences of initial concentration, supply voltage and common cation in groundwater on capacitive deionization for cadmium removal. The results show that the adsorption of cadmium by CDI is monolayer adsorption,which conforms to quasi-second order adsorption kinetics, and satisfies Langmuir isothermal adsorption equation. The adsorption capacity increases with the increase of the initial concentration; at lower concentration, higher voltage increases the adsorption rate at initial stage, but has no significant effect on the final adsorption capacity of the electrode; the main cations in underground water increase conductivity of solution and improve cadmium adsorption rate and removal rate.

Key words: activated carbon, capacitive deionization, adsorb, cadmium

CLC Number:

X523

Dong Jun, Li Wende, Chen Jianlong, Wu Yue, Lu Haojie. Influencing Factors of Cadmium Removal from Groundwater by Capacitive Deionization[J].Journal of Jilin University(Earth Science Edition), 2019, 49(4): 1129-1136.

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Influencing Factors of Cadmium Removal from Groundwater by Capacitive Deionization

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