An integrated method for removal of harmful cyanobacterial blooms in eutrophic lakes.
An integrated method for removal of harmful cyanobacterial blooms in eutrophic lakes.
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DOI：
10.1016/j.envpol.2011.09.003
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发表时间：
2012
影响因子：
8.9
通讯作者：
Zhicong Wang;D. Li;Hongjie Qin;Yinxia Li
中科院分区：
文献类型：
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作者：
Zhicong Wang;D. Li;Hongjie Qin;Yinxia Li
随着湖泊富营养化现象的日益普遍，许多国家都出现了蓝藻水华。虽然已经有一些研究报道，但目前还没有很好的方法来去除水华。我们在这里提出了一个新的两步综合的方法来解决这个问题。第一步是通过加入H2 O2灭活蓝藻。我们发现60 mg/L是对应于100 μg/L叶绿素a的蓝藻浓度的最低有效剂量。第二步是灭活蓝藻的絮凝沉降。结果表明，添加2 g/L的湖泥粘土和20 mg/L的聚合硫酸铁，可以有效地将其沉积在湖底。由于以往的报道中除藻剂和絮凝剂是分开使用的，我们创新性地将这两种药剂结合起来，去除湖泊表面水华，提高湖泊沉积物的溶解氧含量。
As the eutrophication of lakes becomes an increasingly widespread phenomenon, cyanobacterial blooms are occurring in many countries. Although some research has been reported, there is currently no good method for bloom removal. We propose here a new two-step integrated approach to resolve this problem. The first step is the inactivation of the cyanobacteria via the addition of H2O2. We found 60 mg/L was the lowest effective dose for a cyanobacterial concentration corresponding to 100 μg/L chlorophyll-a. The second step is the flocculation and sedimentation of the inactivated cyanobacteria. We found the addition of lake sediment clay (2 g/L) plus polymeric ferric sulfate (20 mg/L) effectively deposited them on the lake bottom. Since algaecides and flocculants had been used separately in previous reports, we innovatively combined these two types of reagents to remove blooms from the lake surface and to improve the dissolved oxygen content of lake sediments.