梯级浮床修复黑臭河道过程中浮游植物动态研究  

Dynamic junior monitoring of phytoplankton in the process of malodorous river remediation by staged ecological floating-beds

作　　者：吴小慧[1] 张丹[1] 黄民生[1] 张勇[2] 何岩[1] 

机构地区：[1]华东师范大学资源与环境学院,上海200062 [2]安徽建筑工业学院,合肥230022

出　　处：《华东师范大学学报（自然科学版）》2011年第1期95-103,共9页Journal of East China Normal University(Natural Science)

基　　金：国家科技重大专项(2009ZX07317-006;2009ZX07317-009)

摘　　要：采用现场试验方法,将挺水、浮叶和沉水植物组合成梯级浮床以修复黑臭河道;监测浮游植物动态变化情况,并结合水质理化指标对梯级浮床修复黑臭河道的机理进行研究,以期为黑臭河道治理与修复提供参考.实验结果表明,经梯级浮床修复后,浮游植物种类中绿藻门和蓝藻门所占比例明显下降,优势种也发生改变,其中沉水植物浮床浮游植物门类最多,反映了出水水质改善;生物密度6月份最低,9月份达到最大值,其值(>1×105ind..L-1)均反映了水体营养盐浓度高,其中挺水植物浮床值最低,说明香菇草的抑藻能力最强;3种浮游植物多样性指数显示水质有改善的趋势,但各指数指示的水质污染情况存在明显差异,不适合单独评价水体.浮游植物种类数与CODCr相关性较大,其生物密度与DO相关性较大,香农多样性指数与TP及CODCr相关性较大,丰富度指数与pH和CODCr相关性较大,均匀度指数与TP(r=0.438,P<0.05)显著相关,但各项指数与NH3-N相关性均较小.The emergent,floating leaf and submerged plants were integrated into Staged Ecological Floating-beds（SEF） for malodorous river′s purification and remediation.The dynamic characteristics of phytoplankton and the water quality were monitored to study the mechanisms of the ecological staged floating-beds for remediation of malodorous river.The results showed that the percentage of Chlorophyta and Cyanophyta decreased after SEF remediation.It was also found that the dominant phytoplankton species were changed,indicating that the quality of effluent were improved.The phytoplankton density reached the maximum in September and the lowest in June,with their values higher than 1×105 ind.·L-1 reflecting the high concentrations of nutrients in water.Emerged plant floating-beds among the SEF have the lowest phytoplankton density,indicating that the Hydrocotyle vulgaris has the strongest growth inhibition on algae.Additionally,three kinds of bio-diversity indexes of phytoplankton showed the trends of water quality were improved notably,but there were significant differences in these indexes,and that means it is not suitable to assess the water quality by a single index.The phytoplankton species had close correlation with CODCr and the phytoplankton density had the same relationship with DO.The Shannon-Wiener diversity index was highly correlated with CODCr.The Margalef index was also correlated with CODCr and pH,and the Pielou index significantly correlated with TP（r=0.438,P0.05）.However,all indexes correlated with NH3-N were not remarkable.

关 键 词：梯级浮床 黑臭河道 浮游植物 监测 

分 类 号：X172[环境科学与工程—环境科学]