嗜热四膜虫在评价珠江广州段水体中的应用初探

发布时间：2018-06-23 07:56

  本文选题：嗜热四膜虫 + 水体污染　； 参考：《现代预防医学》2017年20期

【摘要】：目的探讨嗜热四膜虫在水质监测中的应用。方法采集广州段几处水体培养嗜热四膜虫,分析种群数量和世代时间的变化。同时测定水体中非生物环境因子,在此基础上分析四膜虫生物指标与水质指标的相关性。结果 (1)与对照组相比,四膜虫生长速度呈中游下游上游的分布,世代时间呈上游下游中游分布,多重比较和聚类分析显示中游与上、下游差异有统计学意义(P0.05)。(2)生化需氧量中游为Ⅲ类标准,其他均超过Ⅴ类标准。溶解氧为Ⅱ~Ⅴ类水标准。氨氮超过Ⅴ类标准。高锰酸盐指数为Ⅱ~Ⅴ类标准。中游的金属元素为Ⅰ类标准,上游和下游的铅、铜均为Ⅲ类标准,六价铬超过Ⅴ类标准。石油类上游和中游低于标准限值(1 mg·L~(-1)),下游比标准限值高出1倍以上。(3)四膜虫世代时间与五日生化需氧量、氨氮呈正相关(P0.05)。结论广州段上游和下游受有机物、重金属污染突出,下游石油类污染严重。四膜虫的世代时间对该流域中的BOD5、氨氮指标有初步指示作用。
[Abstract]:Objective to study the application of Tetrahymena thermophilus in water quality monitoring. Methods Tetrahymena thermophila was collected from several water bodies in Guangzhou section, and the changes of population and generation time were analyzed. At the same time, the non-biologic environmental factors in water were determined, and the correlation between the biological index of Tetrahymena and the water quality index was analyzed. Results (1) compared with the control group, the growth rate of Tetrahymena was distributed in the upper and lower reaches of the middle and lower reaches, and the generation time was distributed in the upper and lower reaches. The multiple comparisons and cluster analysis showed that the growth rate of Tetrahymena was in the middle and upper reaches. The downstream difference was statistically significant (P0.05). (2). The middle reaches of biochemical oxygen demand were class 鈪，

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