摘要
采用介质阻挡放电等离子体技术去除太湖水华蓝藻,考察了放电输出功率、空气流速、添加剂(异丙醇、腐植酸)等对蓝藻去除的影响。结果表明,介质阻挡放电能去除太湖水华蓝藻,放电功率100 W,空气流速1.0 L/min,放电18min,在光照强度2 000 lx和25℃下培养4 d,初始叶绿素a浓度为9.58 mg/L藻液中蓝藻去除率达87.8%。增加放电输出功率和空气流速能提高蓝藻的去除效率;腐植酸促进了介质阻挡放电对蓝藻的去除;而异丙醇添加剂抑制了介质阻挡放电的作用。放电处理后,蓝藻细胞内类胡萝卜素含量、SOD活性、MDA含量发生明显变化,介质阻挡放电破坏了蓝藻细胞内含物。
In this study, non-thermal plasma produced by dielectric barrer discharge （DBD） was employed to remove the water bloom cyanobacteria in Taihu Lake. The effects of discharge power, air flow rate, various additives （2-propanol and humic acid） on the removal efficiency of cyanobacteria were discussed. The result showed that the cyanobacteria could be removed by DBD. With 100 W of discharge power, 1.0 L/min of air flow rate, 18 min of discharge time, 2 000 lx of light intensity and $ d of culture time at 25~C , the removal efficiency over 87.8% （the initial Chl-a concentration of cyanobaeteria was 9.58 rag/L）. The removal efficiency increased with the increasing of discharge power and air flow rate. The presences of humic acid enhanced the cyanobacteri- al removal, while the addition of 2-propanol inhibited the cyanobacterial removal. The concentrations of carote- noids and malondialdehyde, the activity of superoxide dismutase in cyanobacterial cell changed after treatment, the intracellular materials of cyanobacteria were damaged.
出处
《环境工程学报》
CAS
CSCD
北大核心
2012年第8期2477-2482,共6页
Chinese Journal of Environmental Engineering
基金
国家自然科学基金资助项目(11075039)
国家水体污染控制与治理科技重大专项(2008ZX07101-004)
关键词
介质阻挡放电
蓝藻
去除
dielectric barrer discharge
cyanobacteria
removal
