School of Chemical and Environmental Engineering,China University of Mining and Technology-Beijing

为了研究电催化对焦化废水中污染物的降解效果,采用电沉积法制备了Ti/PbO2、Ti/PANI/PbO2和Ti/PANI/PbO2-Ce三种电极,对电极进行扫描电镜和X射线衍射表征、电化学性能测试、产羟基自由基(·OH)能力测试和加速寿命测试。结果表明,经聚苯胺(PANI)和铈(Ce)改性的Ti/PANI/PbO2-Ce电极具有更好的表面形貌和更高的催化活性,能产生更多的·OH,析氧电位为1.83V,加速寿命时间为720min。采用Ti/PANI/PbO2-Ce电极降解焦化废水中的蒽,考察了主要因素对降解效果的影响,得到蒽的最佳降解条件为电压14V,板间距1.0cm,电解质浓度0.35mol/L,反应时间120min,pH值10。Ti/PANI/PbO2-Ce电极显示了良好的电催化性能。

To investigate the electrocatalytic degradation effect of anthracene in coking wastewater,Ti/ PbO2,Ti/ PANI/ PbO2 and Ti/ PANI/ PbO2 -Ce electrodes were prepared by electrodeposition,and the electrodeswere subjected to scanning electron microscopy and X-ray diffraction characterization,electrochemical per-formance test,hydroxyl radical (·OH) production capacity test and accelerated lifetime test. The resultsshowed that the Ti/ PANI/ PbO2 -Ce electrode modified with polyaniline (PANI) and cerium (Ce) hadbetter surface morphology and higher catalytic activity,and could produce more ·OH with an oxygen pre-cipitation potential of 1. 83 V and an accelerated lifetime of 720 min. The Ti/ PANI/ PbO2-Ce electrode wasused for the degradation of anthracene in coking wastewater,and the effects of the main factors on the degra-dation effect were investigated,and the optimal degradation conditions for anthracene were obtained asvoltage 14 V,plate spacing of 1. 0 cm,electrolyte concentration of 0. 35 mol/ L,reaction time of 120 min,pHvalue of 10. The Ti/ PANI/ PbO2-Ce electrode showed good electrocatalytic performance.

国家黄河流域生态保护和高质量发展联合研究中心(2022-YRUC-01-0203);河北省自然科学基金(E2021402015)

章丽萍,袁合霞,安逸云,等.二氧化铅电极改性及电催化降解焦化废水中蒽[J].矿业科学学报,2024,9(2):286-294.

ZHANG Liping,YUAN Hexia, AN Yiyun, et al. Modification of lead dioxide electrode and electrocatalytic degradation of anthracene in cokingwastewater[J]. Journal of Mining Science and Technology,2024,9(2):286-294.