化学氧化剂对水华蓝藻的控制研究  

Research on the Control of Chemical Oxidants over Water-Blooming Cyanobacteria

作　　者：陈超[1,2,3] 范帆 史小丽[1] 阳振 陈开宁[1] 黎云祥[2] CHEN Chao;FAN Fan;SHI Xiao-li;YANG Zhen;CHEN Kai-ning;LI Yun-xiang(State Key Laboratory of Lake Science and Environment,Nanjing Institute of Geography and Limnology,Chinese Academy of Sciences,Nanjing 210008,China;College of Environmental Science and Engineering,China West Normal University,Nanchong 637009,China;University of Chinese Academy of Sciences,Beijing 100049,China)

机构地区：[1]中国科学院南京地理与湖泊研究所,湖泊与环境国家重点实验室,江苏南京210008 [2]西华师范大学环境科学与工程学院,四川南充637009 [3]中国科学院大学,北京100049

出　　处：《中国环境科学》2018年第11期4307-4313,共7页China Environmental Science

基　　金：国家水体污染控制与治理科技重大专项项目(2017ZX07603-005);国家自然科学基金资助项目(31670462);西华师范大学博士启动项目(412675).

摘　　要：对比了过氧化氢(H_2O_2)、高铁酸钾(K_2FeO_4)和过碳酸钠(Na_2CO_4)_3种氧化剂对自然水体中群体蓝藻生长和光合活性的影响.结果发现,3种氧化剂对蓝藻均有快速的抑制效应,且随着氧化剂浓度的增加抑制效果增强.相同氧化剂浓度下,H_2O_2对水华蓝藻的去除能力强于K_2FeO_4和Na_2CO_4,对蓝藻光合系统II的最大光量子产量(Fv/Fm)和有效光量子产量(Fv’/Fm’)的抑制效果也更显著.H_2O_2对不同浓度水华蓝藻的控制实验结果表明,初始藻细胞浓度对H_2O_2控藻效果影响较大,细胞密度越大,H_2O_2降解率增加,抑藻效果急剧下降.当初始藻密度为10μg/L和100μg/L,5mg/L H_2O_2的48h降解率分别为64.9%和97.5%,对藻细胞Fv/Fm的抑制率分别为10%和1%.因此,实施H_2O_2控制蓝藻水华的措施应该尽量在蓝藻水华形成早期,即藻密度较低的时候使用.Algaecide treatment is a management strategy to control cyanobacterial blooms.This study assessed three oxidizers such as hydrogen peroxide(H2O2),potassium ferrate(K2FeO4)and sodium percarbonate(Na2CO4),on mitigating cell numbers and inhibiting the photosynthetic activity of cyanobacteria colonies collected from natural lake.Addition of those three algaecides could disrupt cyanobacteria cells and inhibit the maximum(Fv/Fm)and actual(Fv’/Fm’)quantum yield of cyanobacteria,and the inhibitory effect was enhanced when the concentration of algaecides increased.Cyanobacteria cells tended to be more sensitive to H2O2,in comparison with other two algaecides.In addition,H2O2 decomposed more rapidly,and mitigating efficiency as well as the inhibitory effect of photosynthetic activity declined when cyanobacteria biomass increased.When the initial cell density was 10and 100μg/L,the inhibition rate of 5mg/L H2O2 on the maximum quantum yield of cyanobacteria was 10%and 1%,while the degradation rate was 64.9%and 97.5%,respectively.These results indicated that using H2O2 for cyanobacterial bloom control should be exerted when cyanobacteria biomass is relatively low,since the low dosage could function well at the early stage of cyanobacterial bloom.

关 键 词：蓝藻水华 氧化剂 过氧化氢 光合活性 

分 类 号：X524[环境科学与工程—环境工程]