珠江八大口门污染物浓度变化及成因分析

Pollutant concentration variation and analysis of causes in Eight Major Outlet of Pearl Rive

利用20 a来珠江八大口门入海污染物浓度的监测资料进行统计,分析了无机氮(DIN)、活性磷酸盐(PO4-P)、重金属(Hg、Cu、Pb、Cd)、石油类和COD的浓度年际间的变化,结果发现与生活污水相关的DIN、PO4-P浓度多年来呈不断上升趋势,而与工业污水密切相关的重金属和石油类则呈下降趋势,与工业和生活污染共同影响的COD呈先升后降的变化趋势。通过对多年枯水期、丰水期、平水期资料比较分析,发现污染物浓度没有集中在某一水期,分布上无一致规律。本文还就不同污染物浓度变化成因进行了分析。

According to the statistics of 20 year monitoring data of pollutant concentration in the Eight Major Outlet of the Pearl River, the annual concentration variations of DIN,PO4-P, heavy metals such as Hg , Cu, Pb and Cd, oils and COD were analyzed. The resuits show that the concentration of DIN and PO4-P which related to domestic sewage tends to continuously go up, but the concentration of heavy metals and oils which related to industrial waste water tends to go down and the concentration of COD which related to living and industrial pollutants shows the trend of first going up but later going down. Analyzing the pollutant date in dry, rainy and intermediate seasons, the concentrated and regulation distributions of pollutants were not found at the seasons. The causes of concentration variations of different pollutants were analyzed.