DBD高级氧化耦合活性炭吸附处理水中碱性品红

Treatment of Fuchsin Basic in Water by DBD Advanced Oxidation Coupling with Activated Carbon Adsorption

在介质阻挡放电(DBD)水处理反应系统中耦合活性炭对污染物分子的吸附作用,实现反应时间与水力停留时间相分离,统一污染物降解与活性炭再生2个过程,才能达到废水连续高效处理的目标。在系统稳定微放电的条件下,以碱性品红模拟废水进行降解实验,考察放电参数、反应时间、p H值及初始质量浓度等因素对降解率的影响,并利用紫外–可见吸收光谱对中间产物进行初步分析。结果表明,处理时间与碱性品红降解率的变化呈正相关的关系;一定处理时间内,降解率取决于系统能量注入与系统发热量2个方面。在优化的实验条件下,处理12 min后碱性品红的降解率可达89.46%,发色基团完全消失,苯环发生开环。

In order to realize continuously effective treatment of wastewater treatment, we coupled the adsorbent effect of granular activated carbon （GAC） for pollutants＇ molecule to a dielectric barrier discharge （DBD） reactor water treatment system, which separated the reaction time from the hydraulic retention time and consequently synchronized the pollutants＇ degradation and the regeneration of GAC. Furthermore, under the condition of stable micro-discharge in the reaction sys- tem, we conducted degradation experiments using simulated wastewater, namely, fuchsin basic solution, and investigated the influences of discharge parameters, reaction time, pH value, and initial concentration on the degradation rate of fuch- sin basic. The intermediate products in the degradation process were also analyzed preliminarily using ultraviolet visible spectroscopy （UV-VIS）. The results show that the degradation rate of fuchsin basic is positively correlated to the processing time, and within a fixed processing time it is determined by both the energy injected into the system and the heat radiation generated by the reaction. After 12 minutes＇ treatment under the optimized experimental conditions, the de- gradation rate reaches up to 89.46%, the chromophoric groups will completely disappear, and the benzene rings of fuchsin will be opened.