Département des Génies Civil, Ecole Polytechnique de Montréal, Géologique et des Mines, C.P.6079, Succursale Centre-Ville, Montréal, Québec H3C 3A7, Canada.
J Water Health. 2010 Sep;8(3):455-65. doi: 10.2166/wh.2009.207. Epub 2009 Dec 4.
Cyanobacteria are a growing concern in the province of Quebec due to recent highly publicised bloom episodes. The health risk associated with the consumption of drinking water coming from contaminated sources was unknown. A study was undertaken to evaluate treatment plants' capacity to treat cyanotoxins below the maximum recommended concentrations of 1.5 microg/L microcystin-LR (MC-LR) and the provisional concentration of 3.7 microg/L anatoxin-a, respectively. The results showed that close to 80% of the water treatment plants are presently able to treat the maximum historical concentration measured in Quebec (5.35 microg/L MC-LR equ.). An increase, due to climate change or other factors, would not represent a serious threat because chlorine, the most popular disinfectant, is effective in treating MC-LR under standard disinfection conditions. The highest concentration of anatoxin-a (2.3 microg/L) measured in natural water thus far in source water is below the current guideline for treated waters. However, higher concentrations of anatoxin-a would represent a significant challenge for the water industry as chlorine is not an efficient treatment option. The use of ozone, potassium permanganate or powder activated carbon would have to be considered.
由于最近几起备受瞩目的水华事件，安大略省越来越关注蓝藻。由于饮用受污染水源的水而产生的健康风险尚不清楚。开展这项研究的目的是评估处理厂处理微囊藻毒素-LR（MC-LR）最大建议浓度 1.5 微克/升和鱼腥藻毒素-a 的暂定浓度 3.7 微克/升以下的能力。结果表明，目前将近 80%的水处理厂能够处理安大略省历史上测量到的最大浓度（5.35 微克/升 MC-LR 当量）。由于气候变化或其他因素导致的浓度增加不会构成严重威胁，因为氯是最受欢迎的消毒剂，在标准消毒条件下可有效处理 MC-LR。迄今为止，在水源中测量到的天然水中鱼腥藻毒素-a 的最高浓度（2.3 微克/升）低于处理水的现行指南。然而，较高浓度的鱼腥藻毒素-a 将对水工业构成重大挑战，因为氯不是一种有效的处理选择。必须考虑使用臭氧、高锰酸钾或粉末活性炭。
