环境工程学报2023，Vol.17Issue(12)：4048-4057,10.DOI:10.12030/j.cjee.202307005
改性花生壳炭电极的电容去离子技术对高盐尾水中Cl-的去除性能
Cl removal performance from high salt tailwater by capacitive deionization based on modified peanut shell carbon electrode and its application
摘要
Abstract
In this study,the effects of carbonization conditions and KOH modification on the electroabsorption performance of carbon materials were investigated using waste peanut shells as raw materials.Capacitive deionization(CDI)was used to investigate the effect of KOH-modified carbon electrode(KBPS)on the removal of Cl-from the high-salt tailwater of Qingdao wastewater treatment plant.The physical and chemical properties of the carbon materials were characterized by SEM,BET,FTIR,XRD,XPS and contact angle.The result showed that the graphitization and orderliness of the carbon materials increased with the increase of carbonization temperature.The KOH modification improved the specific surface area,graphitization and hydrophilicity of the carbon material.The electrosorption experiments showed that the adsorption capacity of KOH modified carbon electrode KBPS1000 carbonized at 1000 ℃ was 11.097 mg·g-1,which was 30％over that of BPS1000.The best electrosorption performance was achieved at a solution flow rate of 15 mLmin-1 and an operating voltage of 1.2 V.After nine adsorption-desorption cycles,the regeneration rate of KBPS 1000 electrode was 98.41％,and the electrode regeneration performance was stable.The NaCl solution with Cl-concentration of 2000 mg·L-1 was prepared,and a set of cycle was performed using 5 pairs of electrodes,the Cl-concentration could decrease from 2 000 mg·L-1 to 454 mg·g-1 after 22 sets of cycles,and the Cl-removal rate could reach 77.3％.关键词
氢氧化钾改性/花生壳炭电极/电容去离子/Cl-/高盐尾水Key words
KOH-modification/peanut shell carbon electrode/capacitive deionization/Cl-/high-salinity tailwater分类
资源环境引用本文复制引用
万雨欣,王一多,费禹皓,田伟君,储美乐..改性花生壳炭电极的电容去离子技术对高盐尾水中Cl-的去除性能[J].环境工程学报,2023,17(12):4048-4057,10.基金项目
国家级大学生创新训练项目(202210423028) （202210423028）
