降低pH值会增加铜的毒性:一种新的策略来控制有害的藻类繁殖和异味
Ashley V Hennessey1, Michael B McDonald1, Peyton P Johnson1
1School of Fisheries, Aquaculture, and Aquatic Sciences, Auburn University, Auburn, AL, United States.
Ecotoxicology and environmental safety
|June 24, 2025
概括
用二氧化碳 (CO2) 降低pH值可以增强硫酸铜的作用.
科学领域:
- 水生生态学 水生生态学
- 环境化学环境化学
- 物理学的生理学
背景情况:
- 有害的藻类繁殖 (HABs) 降低了水质,并引起了异味.
- 硫酸铜 (CuSO4·5H2O) 是一种常见的,但涉及藻类杀虫剂.
- 人们对铜对环境的影响和治疗疗效存在担忧.
研究的目的:
- 为了研究pH对硫酸铜对HAB的疗效的影响.
- 为了评估降低pH值是否会提高CuSO4·5H2O藻类杀虫剂的性能.
- 评估对蓝藻菌,异味菌和有益植物浮游生物的影响.
主要方法:
- 中等宇宙被用来模拟一个超高的池环境.
- 治疗包括两次硫酸铜剂 (20和80微克/L Cu).
- 在铜处理之前,一半的中宇宙接受了CO2的添加,以降低pH值从9.15到7.58.
主要成果:
- 添加二氧化碳显著改善了蓝色细菌的去除 (24小时内增长了14%),并在20μg/L的Cu剂量下显著减少了异味 (20%在3d中).
- 用二氧化碳处理在一周后维持了 >94%的蓝藻减少和 >95%的异味减少.
- 有益的叶绿素在二氧化碳和铜处理时增加了512%,与没有二氧化碳的对照或处理不同.
结论:
- 用CO2降低pH值显著提高硫酸铜在控制HAB的有效性.
- 这种方法可以将所需的铜剂量减少95%,同时促进有益的植物浮游生物.
- 二氧化碳和硫酸铜的联合处理为HABs提供了更有效和可能更环保的解决方案.
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