摘要
采用水藻固定化技术对含Cd废水进行了吸附研究。结果表明:在pH值、温度、初始重金属浓度、吸附时间等影响因素中,pH值对固定藻吸附重金属的影响最大,其次是初始重金属浓度,吸附时间的影响最小。梅尼小环藻吸附Cd^(2+)的最佳条件是:pH值为7,Cd2+的初始浓度20 mg/L,吸附温度30℃,吸附时间40 min。当采用固定吸附柱吸附原废水时,对Cd、Hg、Cr的去除率分别达到56.44%、49.10%和43.49%。
An adsorption study of Cd containing waste water was conducted with algae fixation technology. The results showed that among all influential factors including pH value, temperature, initial heavy metal concentration and adsorption time, pH value had the biggest influence, then it was initial heavy metal concentration, and adsorption time had the smallest impact. The optimal conditions for Cyclotella meneghiniana adsorbing Cd^（2＋） were as follows： the pH value was 7, initial concentration of Cd^（2＋） was 20 mg/L, and the adsorption temperature and time were 30℃ and 40 mins, respectively. When adsorbing original waste water with fixed algae column, the adsorption rates of Cd, Hg and Cr were 56.44%, 49.10% and 43.49%, respectively.
出处
《湖南农业科学》
2016年第2期60-63,共4页
Hunan Agricultural Sciences
基金
湖南省教育厅项目(14C0674)
关键词
淡水藻
生物吸附
重金属
固定藻柱
freshwater algae
bio-adsorption
heavy metal
fixed algae column
