摘要
采用活性炭吸附,研究了多元M-L体系废水的处理工。应用络合配位化学和活性炭表面电荷特性的基本理论,讨论了L/M、pH、吸附时间,吸附剂用量及吸附容量等工艺条件,与处理效果的关系。试验表明,金属络合系数,L/M及pH值,对污染物的去除有很大的影响。控制低pH值(pH<pH_(zpc)),在一定的吸附刺用量和吸附时间为30～45分钟条件下,处理后排放水的COD和金属离子含量可以达标。
An extensive experimental study on the treatment of multicomponent metal-chelate system wastewater was conducted to examine the adsorption behavior of metals and the optimum technological condition. Based on the theories of metal-ligand chemistry and surface charge characteristics of activated carbon, the relations between the technological conditions, such as L/M(ratio of chelating agent to metals), pH value, adsorption time, carbon dose and adsorption capacity etc., and the treat- effects were examined and discussed. The result showed that the chelating constant, L/M ratio and pH value influence the removal of contaminants considerably. By controlling lowerpH value (pH<pH_(ZPC)), certain activated cardon dose and adsorption time (30～45 minutes), COD and the concentration of metalions in effluent could reach the drainage standards.
出处
《上海环境科学》
CAS
CSCD
1991年第11期16-20,共5页
Shanghai Environmental Sciences
关键词
污水处理
吸附
络合剂
金属离子
adsorption wastewater treatment chelating agent environmental pollution metal ion
