电絮凝法去除水中微量叔丁醇的研究

采用电絮凝法对水中微量的叔丁醇(TBA)进行去除,分别考察了电极材料、极板间距、电流密度、溶液初始pH值对叔丁醇去除效果的影响.结果表明,以铝为阳极、不锈钢为阴极,极板间距为1.4cm,电流密度为20mA/cm2,溶液初始pH值为8时,电解120min后叔丁醇的去除率为80.4％,此时铝阳极实际损耗量(1.93kg/m...

Removal of trace tert-butyl alcohol (TBA) in aqueous solution by electrocoagulation

This work investigated removal of trace tert-butyl alcohol (TBA) from aqueous solution by using electrocoagulation technology. Effects of electrode materials, electrode distance, current density and initial pH values of solution on the removal of TBA were studied, respectively. The results showed that after 120minutes, the removal efficiency of TBA could reach 80.4% when aluminum was used as the anode, stainless steel was used as the cathode, the electrode distance was 1.4cm, the current density was 20mA/cm², and the initial pH value of the solution was 8. Meanwhile, the actual loss of aluminum anode (1.93kg/m³) was more than the theoretical loss (1.61kg/m³). Besides, the removal process of TBA by electrocoagulation could also be predicted by a pseudo-first-order kinetics equation. The analysis of floc characteristics showed that in addition to adsorption and flocculation effects of AlO(OH) and Al(OH)₃ floc, there was also an anodic oxidation process in the process of removing TBA by electroflocculation, which resulted in oxidation of TBA to aldehydes, ketones and other small molecular substances.