Water Research Centre, The Environment Institute, The University of Adelaide, SA 5005, Australia.
Australian Water Quality Centre, SA Water Corporation, GPO Box 1751, SA 5001, Australia.
J Hazard Mater. 2014 Jan 15;264:313-22. doi: 10.1016/j.jhazmat.2013.10.059. Epub 2013 Nov 13.
Cyanobacterial blooms are one of the main contaminants that can degrade drinking water quality with the associated taste, odour and toxic compounds. Although a wide range of techniques have shown promise for cyanobacterial bloom control and cyanobacterial cell/metabolite removal in reservoirs and water treatment plants (WTPs), these treatments may have negative consequences through release of intracellular metabolites into the surrounding water. This study assessed the impact of copper sulphate (CuSO4), chlorine, potassium permanganate (KMnO4), hydrogen peroxide (H2O2) and ozone on Microcystis aeruginosa culture and the toxins it produced. All of these agents induced the loss of cyanobacterial membrane integrity. However, no associated increase in dissolved toxins was detected during chlorine and H2O2 treatments which may be due to faster toxin oxidation rates than release rates. KMnO4 doses of 1 and 3mgL(-1) degraded dissolved toxins while having no impact on cyanobacterial membrane integrity. In contrast, ozone induced a significant increase in extracellular toxins but it was unable to degrade these toxins to the same degree as the other oxidants which may due to the lack of residual. All chemicals, except CuSO4, were able to reduce cyanotoxins and chlorine was the most effective with a rate up to 2161M(-1)s(-1).
蓝藻水华是降低饮用水水质的主要污染物之一，其会产生相关的异味、气味和有毒化合物。尽管广泛的技术已显示出在水库和水工厂（WTP）中控制蓝藻水华和去除蓝藻细胞/代谢物的潜力，但这些处理方法可能会通过将细胞内代谢物释放到周围水中而产生负面影响。本研究评估了硫酸铜（CuSO4）、氯、高锰酸钾（KMnO4）、过氧化氢（H2O2）和臭氧对铜绿微囊藻培养物及其产生的毒素的影响。所有这些试剂都诱导了蓝藻细胞膜完整性的丧失。然而，在氯和 H2O2 处理过程中未检测到溶解毒素的增加，这可能是由于毒素氧化速率比释放速率更快。1 和 3mg/L 的 KMnO4 剂量降解了溶解毒素，而对蓝藻细胞膜完整性没有影响。相比之下，臭氧诱导了细胞外毒素的显著增加，但它无法将这些毒素降解到与其他氧化剂相同的程度，这可能是由于缺乏残留所致。除了 CuSO4 之外，所有化学物质都能够减少蓝藻毒素，而氯的效果最显著，其去除速率高达 2161M(-1)s(-1)。
