1.National Engineering Research Center of Urban Water Resources,Harbin Institute of Technology,Harbin , China； 2.Harbin Institute of Technology, Harbin , China

为探寻适宜于煤热解废水的毒性评估方法,从煤热解废水典型致毒环状污染物出发,利用3种废水毒性测试物种(小球藻、四膜虫、大型溞),根据光照条件和样本色度对测试方法的影响进行研究,并对比了评估方法对实际废水的适用性。结果表明:光照和色度都会显著影响典型污染物毒性评估,建议毒性测试应在避光条件下进行,且尽量避免采用以吸光度表征的毒性测试方法;实际废水中,藻类方法因光照、色度影响无法对废水毒性准确评估,不宜采用;大型溞毒性评估结果随厌氧、好氧、高级氧化处理工艺出水毒性单位(TU)分别为100.87、12.13和8.37,敏感性、适用性最高,适宜煤热解废水毒性评估;四膜虫在好氧段TU=6.67,与大型溞评估结果相近,可作为好氧段评估方法。

In order to search for a feasible toxicity assessment assay for coal pyrolysis wastewater,based on typical toxic cyclic pollutants in coal pyrolysis wastewater,three common species were applied to investigate effect of light conditions and sample color on the tests,as well as their applicability in real coal pyrolysis wastewater.The results showed,as light and color highly affected the toxicity evaluation of typical pollutants,it was suggested that the toxicity should be tested in dark conditions,and testing methods characterized by absorbance should be avoided.Finally,algae test was not suggested for toxicity evaluation of coal pyrolysis wastewater,while Daphnia magna (D.magna) was suggested for application due to the highest applicability in the real coal pyrolysis wastewater evaluation with TU was 100.87,12.13 and 8.37 for effluent from anaerobic,aerobic,advanced oxidation process,respectively.And Tetrahymena thermophile (T.thermophile) may be an alternative toxicity test for aerobic wastewater with TU=6.67,similar to D.magna.

国家重点研发计划资助项目(2017YFB0602804)；