宿州市沱河沉积物氮磷和有机碳分布及评价

摘要

In the paper , the contents of total nitrogen ( TN) , total phosphorus ( TP) and total organic car-bon ( TOC) in sediment from Tuohe River in Suzhou were determined .Based on analyzing the spatial distribution characteristics, it was revealed the possible sources of three kinds of pollutants by C /N and N/P ratios and eval-uated the pollution level by converted organic nitrogen and organic matter index .The results showed that the av-erage contents of TN, TP and TOC in sediment were 1343 mg/kg, 608 mg/kg and 30201 mg/kg, respectively. The C/N and N/P ratios revealed that C , N and P pollutants in sediment might come from exogenous inputs which were greatly affected by the development of coal industry .The organic nitrogen from urban river sediment in Suzhou City reached to the third degree , which still belonged to clean level .The organic index indicated that the organic pollution in sediment from the urban section of Tuohe River in Suzhou City reached to the Ⅳ level, which belonged to organic pollution .In general , the analysis data from No .5 sampling site should be paid close attention by related departments .%通过测定沱河宿州城区段沉积物中总氮(TN)、总磷(TP)和总有机碳(TOC)的含量,分析其分布特征,运用C/N和N/P比值法研究其可能来源,采用有机指数和折算后有机氮评价沱河沉积物污染状况.结果表明:沱河城区段沉积物中TN、TP和TOC平均质量比分别为1343 mg/kg、608 mg/kg和30201 mg/kg;C/N和N/P比值表明河流底泥沉积物中C、N和P污染可能是外源输入,且受煤炭工业发展影响较大;有机氮达到Ⅲ级,属于尚清洁程度,有机指数达到Ⅳ级,属于有机污染范畴,5号采样点需引起有关部门注意.