用SOS/Umu生物测试评价北方某自来水厂对遗传毒性物质的去除效果
Assessment of the effects of removal genotoxicity for a waterworks located in the north of China by using SOS/Umu test
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摘要: 大量研究表明，饮用水中存在着能导致遗传毒性的物质，在我国许多水厂水质检测能力有限的前提下，生物毒性指标作为反映有毒物质综合指标具有重要的现实意义。本研究应用SOS/Umu生物毒性测试评价了北方某市一自来水厂的A、B、C、D 4套试验工艺在不同的季节（冬春两季）各工艺段出水的遗传毒性效应。结果显示，冬春两季地表水加氯后遗传毒性效应均显著增加，冬季间接遗传毒性效应高于春季；活性炭吸附对去除遗传毒性物质效果显著，但后期加氯使遗传毒性效应增加；冬春两季比较，以及地下水和地表水比较，各工艺出水的遗传毒性效应差别很大。通过研究表明，本研究所应用的生物毒性测试SOS/Umu能够快速、准确地对水厂工艺过程中致突变物质的处理效果进行评价，能对工艺改进提出指导，是自来水质安全性评价的重要补充手段。Abstract: A lot of studies show that there are a great of genotoxic substances in drinking water. Biological toxicity as integrated indicators to reflect toxic substances has important practical significance for most China′s waterworks which are limited in checking water quality. This study use SOS/Umu test to evaluate the drinking water of various processes for a large waterworks located in north China, both in spring and winter. The study shows that （1) genotoxicity effects were significantly increased for surface water both in spring and winter after chlorination, and （2) indirect genotoxicity effect in winter is higher than that in spring, and （3) Activated carbon are effective on removing genotoxicity substances, but late chlorination leads genotoxicity increase and may be the main reason why the outgoing water takes on genotoxicity. （4) There is obvious difference between groundwater and surface water ，and the effluents in winter and in spring also differ greatly. This study shows that SOS / umu test, as an important and useful method for drinking water safety evaluation, can be used for evaluating the removal efficiency of the genotoxicity quickly and accurately.
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Key words:
- bioassays /
- drinking water /
- genotoxicity /
- SOS/Umu
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