研究报告
邱丽佳,张君枝,张艳娜,马文林,陈汉,张质明.H2O2氧化铜绿微囊藻致嗅物质及灭藻效应研究[J].环境科学学报,2017,37(3):954-961
H2O2氧化铜绿微囊藻致嗅物质及灭藻效应研究
- Oxidation of odor compound and inactivation efficiency of Microcystis aeruginosa by hydrogen peroxide
- 基金项目:国家自然科学基金项目(No.51408022);国家水体污染控制与治理科技重大专项课题(No.2015ZX07406001);北京市优秀人才培养资助项目(No.2013D005017000009);北京市自然科学基金项目(No.8154044)
- 邱丽佳
- 北京应对气候变化研究和人才培养基地, 城市雨水系统与水环境省部共建教育部重点实验室, 北京建筑大学, 北京 100044
- 张君枝
- 北京应对气候变化研究和人才培养基地, 城市雨水系统与水环境省部共建教育部重点实验室, 北京建筑大学, 北京 100044
- 张艳娜
- 中国石油勘探开发研究院, 北京 100083
- 马文林
- 北京应对气候变化研究和人才培养基地, 城市雨水系统与水环境省部共建教育部重点实验室, 北京建筑大学, 北京 100044
- 陈汉
- 北京应对气候变化研究和人才培养基地, 城市雨水系统与水环境省部共建教育部重点实验室, 北京建筑大学, 北京 100044
- 张质明
- 北京应对气候变化研究和人才培养基地, 城市雨水系统与水环境省部共建教育部重点实验室, 北京建筑大学, 北京 100044
- 摘要:分别以不同浓度梯度的H2O2为氧化剂,研究其对铜绿微囊藻致嗅物质β-环柠檬醛的去除效果和藻细胞的灭活程度.结果表明,当藻细胞密度为1.01×106 cells·mL-1时,H2O2对胞外β-环柠檬醛的氧化较为迅速,反应1 min内即可去除75%以上,而对胞内β-环柠檬醛的降解比较缓慢,只有在投加4或5 mg·L-1时才能取得显著效果;其降解的二级动力学速率常数为57.12 L·mol-1·s-1;H2O2的氧化能力相对较弱,不足以导致藻细胞剧烈破碎,但也因此而减少了藻毒素的释放;并且H2O2可使溶解性有机物各个组分的荧光强度明显降低,荧光峰中心位置也发生了一定的偏移;因细胞壁和细胞膜受到损害,浓度为4 mg·L-1以上的H2O2能够充分灭活藻细胞.
- Abstract:The removal efficiency of odor compound β-cyclocitral and inactivation of algal cells on Microcystis aeruginosa were studied with different concentrations of hydrogen peroxide. The results show that the oxidation of extracellular β-cyclocitral by hydrogen peroxide was rapid when the density of algal cells was 1.01×106 cells·mL-1, and the removal efficiency could be more than 75% within 1 min, while the degradation of intracellular β-cyclocitral was relatively slow, and significant effect could be achieved only under the condition of 4 or 5 mg·L-1 hydrogen peroxide. The secondary rate constant of degradation was 57.12 L·mol-1·s-1. The oxidation ability of hydrogen peroxide was not strong enough to significantly disrupt the algal cells, and it also avoided the release of microcystin. Additionally, hydrogen peroxide could make the dissolved organic matter decrease clearly, and the fluorescence peaks of DOM also had red- or blue-shifts. Due to the damage of the cell wall and cell membrane, over 4 mg·L-1 of hydrogen peroxide could inactivate algal cells completely.
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