摘要
为了同时去除废水中的重金属离子和有机污染物,以镉离子(Cd2+)和酸性橙7(AO7)为目标污染物,研究比较了活性炭(AC)、脉冲电晕放电等离子体(PCDP)以及PCDP结合AC(PCDP-AC)3种体系对废水中Cd2+和AO7的去除效果。考察了脉冲放电电压、载气种类、溶液初始pH值和电导率对Cd2+和AO7去除的影响。结果表明:PCDP-AC体系可以同时有效地去除废水中的Cd2+和AO7,且去除效果明显好于AC和PCDP单独处理;增加脉冲放电电压,可以提高Cd2+和AO7去除率;氧气作为载气的去除效果高于空气或氮气作为载气的去除效果;酸性条件下AO7的去除率好于碱性条件,而Cd2+的去除率在碱性条件下好于酸性条件;增加溶液初始电导率,会导致Cd2+和AO7去除率下降。
In order to remove heavy metal ions and organic pollutants in wastewater simultaneously, choosing cadmium ions （Cd2＋） and acid orange 7 （AO7） as the target pollutants, we compared the removal effects of Cd2＋ and AO7 in three systems, i.e. an activated carbon （AC） adsorption system alone, an pulsed corona discharge plasma combined （PCDP） treatment system alone, and a system that combined PCDP with AC （PCDP-AC） treatment system. We also investigated the effects of pulse discharge voltage, gas kinds, initial solution pH and electrical conductivity on the removal of Cd2＋ and AO7 in the systems. The results show that Cd2＋ and AO7 in wastewater are removed simultaneously by the PCDP-AC treatment system, with removal efficiency significantly higher than that in the AC adsorption system alone or the PCDP treatment system alone. An increasing pulsed voltage enhances the removal of Cd2＋ and AO7. Compared with nitrogen or air, oxygen as the feeding gas will lead to a higher removal efficiency of Cd2＋ and AO7. Lower pH benefits the removal of AO7, while higher pH helps to remove Cd2＋. With the same input power and solution pH, increasing the solution＇s initial electrical conductivity reduces the efficiency of removing Cd2＋ and AO7.
出处
《高电压技术》
EI
CAS
CSCD
北大核心
2014年第1期201-205,共5页
High Voltage Engineering
基金
国家自然科学基金(21107085)
中央高校基本科研业务费专项资金(QN2013073)~~
关键词
脉冲放电
等离子体
活性炭
重金属离子
有机污染物
废水处理
pulsed discharge
plasma
activated carbon
heavy metal ions
organic pollutants
waste water treatment
