电极-SBBR处理含铜有机污水

Treatment of sewage containing copper by electrode-SBBR

采用电极-SBBR系统去除Cu2+,考察了电流强度IA、竞争离子(阴离子SO24-、NO3-、Cl-和阳离子Zn2+、Pb2+)、初始含Cu2+量及溶液pH值对除铜效除果的影响。结果表明,当电流强度为40 mA时Cu2+去除率最高为98%。投加阴(SO24-、NO3-、Cl-)、阳(Zn2+、Pb2+)离子均会引起出水Cu2+浓度的增加,且Cl-和Pb2+含量分别为45 mg/L和30 mg/L时对Cu2+去除的影响更为显著。进水Cu2+浓度为30 mg/L时,Cu2+去除率最高为98.48%,当进水Cu2+≥70 mg/L时,出水Cu2+浓度不能达标。酸性(pH 4.0～4.5)与碱性(pH 9.0～10.0)条件均不利于Cu2+的去除,且酸性条件的负面影响更显著,当pH为4.5～7.5时,Cu2+去除率最高为97.78%。

Electrode-SBBR system was used to investigate the effects of various factors on removal of copper ion such as current intensity （IA ）, competing ions （ SO24-, NO3- , CI- and Zn2 ＋ , Pb2 ＋ ）, the initial Cu2 ＋ con- centration and pH. Results showed that the removal rate of Cu2＋ was up to 98% while the In was 40 mA. Howev- anions（SO4 , NO3- , C1- ） and cations（Zn2＋ , Pb2＋ ） both increased the concentration of Cu2＋ in ef- er, adding ＂ 2 - fluent, and significant increases were observed while C1- and Pb2＋ concentration were 45 mg/L and 30 rag/L, respectively. Additionally, with initial concentration of Cu2＋ being 30 mg/L, the highest removal rate of Cu2＋ was 98.48% ; and concentration of Cu2＋ in effluent failed to meet the standard while concentration of Cu2＋ of in- fluent exceeded 70 mg/L. Furthermore, the removal and alkaline （pH 9.0 - 10.0） conditions, while the of oH ran＋inz from 4.5 to 7.5. removal rate of Cu2 ＋ process was undermined both under acid （pH 4.0 ＋ 4.5 ） situation was worse in the former one. Under the condition reached 97.78%.