Copper-Based Aquatic Algaecide Adsorption and Accumulation Kinetics: Influence of Exposure Concentration and Duration for Controlling the Cyanobacterium Lyngbya wollei
Copper-Based Aquatic Algaecide Adsorption and Accumulation Kinetics: Influence of Exposure Concentration and Duration for Controlling the Cyanobacterium Lyngbya wollei
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DOI：
10.1007/s00128-017-2134-2
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发表时间：
2017-09-01
影响因子：
2.7
通讯作者：
Cope, W. Gregory
中科院分区：
文献类型：
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作者：
Bishop, West M.;Lynch, Clayton L.;Cope, W. Gregory
形成丝状藻的蓝藻越来越多地损害淡水资源的使用。为了有效管理，需要更好地了解控制措施。铜（Cu）基杀藻剂制剂通常被应用于反应性地控制讨厌的蓝藻水华。本实验室研究评估了典型的现场暴露方案的能力，铜分区，并积累在鞘丝藻wollei。在三种含水铜浓度（1，2，4 ppm）下测试了4，8，16，24，32 h的暴露因子（铜浓度x持续时间）。结果表明，铜的体内积累量与控制L。wollei，独立的吸附铜。L. Wollei控制通过细丝活力和叶绿素a浓度来确定。相似的暴露因素引起了相似的内化铜水平和随后的反应L。wollei。最后，一个“浓度暴露时间”（CET）模型的创建，以帮助水资源管理人员在选择一个适当的处理制度，为特定的水侵扰。通过评估达到铜的内部阈值所需的暴露浓度和持续时间（即，关键负担），加强控制，水管理目标可以实现，同时减少铜的环境负荷和潜在的非目标物种的风险。
Filamentous mat-forming cyanobacteria are increasingly impairing uses of freshwater resources. To effectively manage, a better understanding of control measures is needed. Copper (Cu)-based algaecide formulations are often applied to reactively control nuisance cyanobacterial blooms. This laboratory research assessed typical field exposure scenarios for the ability of Cu to partition to, and accumulate in Lyngbya wollei. Exposure factors (Cu concentration x duration) of 4, 8, 16, 24, 32 h were tested across three aqueous Cu concentrations (1, 2, 4 ppm). Results indicated that internally accumulated copper correlated with control of L. wollei, independent of adsorbed copper. L. wollei control was determined by filament viability and chlorophyll a concentrations. Similar exposure factors elicited similar internalized copper levels and consequent responses of L. wollei. Ultimately, a "concentration-exposure-time" (CET) model was created to assist water resource managers in selecting an appropriate treatment regime for a specific in-water infestation. By assessing the exposure concentration and duration required to achieve the internal threshold of copper (i.e., critical burden) that elicits control, water management objectives can be achieved while simultaneously decreasing the environmental loading of copper and potential for non-target species risks.