摘要
本文研究了活性污泥对水中铍的吸附特性。考察了时间、温度、pH、共存离子等对吸附过程的影响,以及吸附过程中溶液pH的变化规律,研究结果表明:铍在污泥上的吸附主要为快速的表面吸附,受温度影响不大,在pH3～7范围,吸附量随pH的升高而增大,铜、铅、锌、钙由于共同竞争吸附电位而使吸附量下降,铁、铝等由于产生微沉淀而致使吸附量增加,钠由于具有竞争和生成复盐双重作用导致吸附量交叉变化,硫酸根和磷酸根由于与铍生成沉淀而增加去除率,而氟和铍生成稳定配离子使去除率下降,溶液pH由于生成配离子而呈现反常的升高;此外,还探讨了不同解吸剂对污泥中铍的解吸效果,结果表明,盐酸解吸效果最佳,解吸率高达96.73%。
The adsorption characteristics of activated sludge on Be in water was studied. The effect of time, temperature, pH, co-existing ions on adsorption sludge was mainly of surface adsorption and was not affected abviously by temperature; within pH 3-7, the adsorption amount increased as pH rose; the adsorption amount of copper, lead, zinc, calcium lowered due to their commom Competitive adsorption potentials; the adsorption amount of iron, aluminium increased due to their generating sedimentation, etc.
出处
《水处理技术》
CAS
CSCD
北大核心
2006年第2期45-48,共4页
Technology of Water Treatment
基金
湖南省科技计划重点项目(02CTY2003)
关键词
活性污泥
铍废水
吸附
特性
解吸
activated sludge, wastewater containing Be
adsorption
characteristics
desorption
