电场强化复合吸附塔处理重金属Cd^(2+)离子的研究

REMOVAL OF CADMIUM BY ELECTROINTENSIFIED COMBINED BIOADSORPTION

选择石英砂与枯草芽孢杆菌(Bacillus subtilis)死菌体组成复合吸附剂,在外加直流微电场的强化作用下,对废水中Cd^(2+)离子进行穿透曲线测定,结果表明,Cd^(2+)在石英砂装填的电生物复合吸附(EBA)装置中吸附作用较差,微电场的存在对重金属离子的吸附起到了明显的强化作用,微电场+复合吸附剂对重金属离子的吸附效果优于其它两种条件.

A method to removal heavy metal ions from wastewater by electro-intensified combined bioadsorption column has been developed. The combination of dead Bacillus subtilis and silica sand was chosen as the sorbent by considering the characteristic of biomass and inorganic sorbent. The removal performance of silica sand sorbent, electromigration intensified silica sorbent and electromigration intensified combined bioadsorption was compared by inspecting the breakthrough curve of Cd^2＋ in the column. The experiment result shows that the sorption capacity of combined bioadsorbent is higher than silica and electromigration significantly can significantly intensify the sorption capacity of the combination sorbent.