Water Research Centre, The Environment Institute, The University of Adelaide, SA 5005, Australia.
Water Res. 2013 Sep 15;47(14):5153-64. doi: 10.1016/j.watres.2013.05.057. Epub 2013 Jun 11.
Cyanobacterial blooms are continuously critical challenges in drinking water systems which can have various negative impacts such as production of taste, odour and toxic compounds. Furthermore, the intracellular metabolites could be released into surrounding waters when the cyanobacterial membranes are destroyed. Although a variety of techniques have been developed to control cyanobacterial blooms and remove cyanobacterial cells or metabolites in water treatment processes, the effect of these treatments on the membrane integrity of cyanobacterial cells have not been systematically studied and compared. This study evaluated the effectiveness of copper sulphate (CuSO4), chlorine, potassium permanganate (KMnO4), hydrogen peroxide (H2O2) and ozone on the cell integrity and densities of Microcystis aeruginosa. All of these technologies can compromise the cell membrane of cyanobacteria to varying degrees. Chlorine showed the strongest ability to impair the cell integrity with a majority (≥ 88%) of the cells compromised within the first minute and with the cell lysis rates ranging of 0.640-3.82 h(-1) during 1-60 min. Ozone dose of 6 mg L(-1) also could induce 90% lysis of the cyanobacterial cells in 5 min and the cell lysis rate of KMnO4 (10 mg L(-1)) was 0.829 h(-1). CuSO4 and H2O2 could not only destroy the viability of cyanobacterial cells but also showed algistatic potential over the 7 day treatment. The potential of all the oxidants (chlorine, KMnO4, H2O2 and ozone) considered as algicides were discussed in this study. The benefits and drawbacks of these control and water treatment options were assessed as well.
蓝藻水华是饮用水处理系统中持续存在的重大挑战，可能会产生异味、有毒化合物等各种负面影响。此外，当蓝藻细胞膜被破坏时，细胞内代谢物可能会释放到周围水中。尽管已经开发出多种技术来控制蓝藻水华并去除水中的蓝藻细胞或代谢物，但这些处理方法对蓝藻细胞膜完整性的影响尚未得到系统研究和比较。本研究评估了硫酸铜（CuSO4）、氯气、高锰酸钾（KMnO4）、过氧化氢（H2O2）和臭氧对铜绿微囊藻细胞完整性和密度的影响。所有这些技术都能在不同程度上破坏蓝藻的细胞膜。氯气对细胞完整性的破坏能力最强，在最初的一分钟内，大部分（≥88%）细胞受损，在 1-60 分钟内，细胞裂解率在 0.640-3.82 h(-1)之间。臭氧剂量为 6 mg/L 也能在 5 分钟内诱导 90%的蓝藻细胞裂解，而 KMnO4（10 mg/L）的细胞裂解率为 0.829 h(-1)。CuSO4 和 H2O2 不仅能破坏蓝藻细胞的活力，而且在 7 天的处理过程中还表现出抑藻作用。本研究讨论了所有这些氧化剂（氯气、KMnO4、H2O2 和臭氧）作为杀藻剂的潜力。还评估了这些控制和水处理选择的优缺点。
