摘要
对超声强化臭氧传质及其氧化降解邻苯二甲酸二丁酯(DBP)进行了研究.探究体系温度、操作pH、臭氧投加量、臭氧进气流速、DBP初始质量浓度及超声功率对臭氧传质及DBP降解效能的影响,优化臭氧传质及其氧化降解DBP的工艺.综合考虑实验结果及能耗,在体系温度为293.15 K、操作pH为7、臭氧质量浓度为33.12 mg·L-1、臭氧进气流速为300 L·h-1、超声功率为1250 W的条件下,可高效处理DBP初始质量浓度为200 mg·L-1的溶液,此时溶解臭氧质量浓度可达1.2684 mg·L-1,臭氧表观传质系数(KLa)可达0.5587 min-1,DBP去除率可达54.71%.
Abstract
The ultrasonic-enhanced mass transfer of ozone and its oxidative degradation of dibutyl phthalate (DBP) were investigated.The effects of system temperature,operating pH,ozone dosage,ozone inlet flow rate,initial DBP mass concentration,and ultrasonic power on the mass transfer of ozone and the degradation efficiency of DBP were examined to optimize the process.Based on experimental results and energy consumption considerations,optimal conditions for efficient treatment were determined as follows:the system temperature was 293.15 K,the operating pH was 7,the ozone dosage was 33.12 mg·L-1,the ozone inlet flow rate was 300 L·h-1,the ultrasonic power was 1250 W.Under these conditions,the solution with initial DBP mass concentration of 200 mg·L-1 could be effectively treated.At this point in time,the dissolved ozone mass concentration reached 1.2684 mg·L-1;the apparent mass transfer coefficient (KLa) for ozone was measured at 0.5587 min-1;the removal rate of DBP reached 54.71%.
基金项目
陕西省教育厅科研计划(23JK0443)
陕西省油气田环境污染控制技术与储层保护重点实验室项目(XSYU-HJ-2023003)
渭南市科技计划项目(2022ZDYFJH-80)
维普
万方数据