β-PbO_(2)和BDD电极处理印染反渗透浓水性能  

Performance comparison of β-PbO_(2) and BDD electrodes for treating reverse osmosis concentrate in printing and dyeing industry

作　　者：刘梓锋 郑睿豪 周青青 王家德 史学儒 LIU Zi-feng;ZHENG Rui-hao;ZHOU Qing-qing;WANG Jia-de;SHI Xue-ru(College of Environment,Zhejiang University of Technology,Hangzhou 310014,China)

机构地区：[1]浙江工业大学环境学院,浙江杭州310014

出　　处：《中国环境科学》2022年第6期2671-2679,共9页China Environmental Science

基　　金：浙江省科技厅重点研发项目(2019C03094);浙江省“万人计划”人才培养项目(2017R52018)。

摘　　要：系统比较了β-PbO_(2)/Ti-Ti和BDD/Si-Ti两种电极体系处理实际印染行业反渗透浓水(ROC)的性能,考察了同步去除化学需氧量(COD)和总氮(TN)的动力学,以及对废水可生化性的改善情况.结果表明,BDD/Si-Ti电极体系的析氧电位(2.45V)和析氯电位(1.90V),以及阳极氧化电位和阴极还原电位的绝对值均高于β-PbO_(2)/Ti-Ti电极体系;两种电极体系对COD以及TN的去除符合拟一级动力学,其中BDD/Si-Ti电极体系对COD去除的表观速率常数和能量利用效率均优于β-PbO_(2)/Ti-Ti电极体系;而β-PbO_(2)/Ti-Ti电极体系对TN去除的表观速率常数和能量利用效率更优.β-PbO_(2)/Ti-Ti电极体系在5mA/cm^(2)的电流密度下电解15min,可使反渗透浓水BOD/COD从0.18升至0.42(提高1.33倍),而BDD/Si-Ti电极体系仅提升0.78倍.两者相比,BDD/Si-Ti电极体系适用于矿化污染物,β-PbO_(2)/Ti-Ti电极体系适用于改善废水可生化性.Two electrode systems of β-PbO_(2)/Ti-Ti and BDD/Si-Ti were systematically compared for the performance in treating reverse osmosis concentrate(ROC)from a real printing and dyeing industry.Kinetics of simultaneous remove chemical oxygen demand(COD)and total nitrogen(TN),as well as the improvement of the biochemical properties of the effluent were also investigated.It is shown that the BDD/Si-Ti electrode system has a high anodic oxygen evolution reaction(OER)potential(2.45V)and chlorine evolution reaction(CER)potential(1.90V),and the absolute values of anodic oxidation potential and cathodic reduction potential are higher than those of the β-PbO_(2)/Ti-Ti electrode system;the degradation of COD and TN followed pseudo-first-order kinetics.The BDD/Si-Ti electrode system is more effective in COD removal and current efficiency while the β-PbO_(2)/Ti-Ti electrode system is more effective in TN removal.Electrolysis at a low current density(5mA/cm2)for 15min resulted in a rise in BOD/COD from 0.18 to 0.42(a 1.33-fold enhancement)for the ROC for theβ-PbO_(2)/Ti-Ti electrode system,while the BDD/Si-Ti electrode system only showed a 0.78-fold enhancement.As a result,the BDD/Si-Ti electrode system is suitable for pollutant mineralization,and the β-PbO_(2)/Ti-Ti system is more suitable for the improvement of wastewater biochemical properties.

关 键 词：反渗透浓水 电化学 印染废水 动力学 

分 类 号：X703.1[环境科学与工程—环境工程]