长江下游太湖流域江阴段2008-2011年水源水氨氮、高锰酸盐指数动态变化分析

Dynamic analysis on the source water ammonia nitrogen and potassium permanganate index of lower reaches of Changjiang river Taihu lake basin Jiangyin period during 2008 to 2011

目的揭示长江太湖流域江阴段水源水中氨氮、高锰酸盐指数的污染变化规律。方法 2008-2011年对江阴段3个水厂取水点源水进行氨氮、高锰酸盐指数监测。结果 4年间氨氮在0.10～0.86mg/L之间,平均值(0.15±0.18)mg/L;总体呈逐年上升趋势,每年间差异无统计学意义。季节上枯水期污染严重,丰水期较轻。高锰酸盐指数在0.24～2.80mg/L之间,平均值(1.79±1.20)mg/L;呈逐年上升趋势,每年间差异有统计学意义,季节上秋季污染最严重。结论长江太湖流域江阴段源水中氨氮、高锰酸盐指数呈逐年上升趋势,有机污染物是两者升高的内在因素。

Objective To understand the pollution status of source water ammonia nitrogen and potassium permanganate index in Changjiang river Taihu basin Jiangyin segment.Method Selecting the source water of 3 water plants in Jiangyin during 2008 to 2011 and monitoring ammonia nitrogen in the water and potassium permanganate index.Results In the past 4 years,ammonia nitrogen were among the level of 0.10 to 0.86 mg/L and average value was 0.15±0.18 mg/L,the level raised year by year,but there was no statistically significant between the years.Water pollution was serious in dry season and light in wet season.Potassium permanganate index was during 0.24 to 2.80 mg/L,and the average was 1.79±1.20 mg/L,it was increasing year by year,and there was statistically significant between the years,in autumn the pollution was the most serious.Conclusions The ammonia nitrogen and potassium permanganate index of taihu lake basin jiangyin period were increasing year by year,organic contaminant was the internal factors of the two rising