摘要
采用城市污水处理厂产生的活性污泥研究了影响污泥吸附Zn2 +,Cu2 +和Cd2 +三种重金属离子的主要因素 .在实验条件下 ,温度对污泥吸附重金属的影响并不显著 ,而体系pH值和吸附时间等的影响较为重要 .活性污泥对Cu2 +的吸附符合Langmuir模型 ,Zn2 +则与Freundlich模型的符合程度优于Langmuir模型 ,Cd2 +的吸附与两个模型的符合程度一致 .另外 ,活性污泥对Cu2 +离子的吸附性能明显高于其他离子 。
Biosorption of heavy metals,copper,cadmium and zinc,was carried out using activated sludge from municipal sewage treatment plant,and the effects of performance parameters such as pH,T(℃) and sorption duration on it were analyzed.No significant effect of temperature has been observed in the test,while other factors exerted important influence on the sorption process.Besides,the sorption process of Cu 2+ is in accordance with Langmuir isotherm,while that of Zn 2+ better complies with Freundlich model.Both models fit the sorption of Cd 2+ very well.In addition,the sorption capacity of the sludge for Cu 2+ was much higher than other two ions.However,in this test,prisence of other metal ions made no difference in sorption capacity of sludge for any ions.
出处
《环境化学》
CAS
CSCD
北大核心
2002年第6期528-532,共5页
Environmental Chemistry
基金
江苏省自然科学基金资助项目 (编号 :BK2 0 0 1 0 84 )
