周村水库沉积物污染物释放潜力模拟  

Simulation of Potential Release of Sediment Pollutants at Zhoucun Reservoir

作　　者：曹占辉[1] 黄廷林[1] 邱晓鹏[1] 史建超[1] 

机构地区：[1]西安建筑科技大学环境与市政工程学院,陕西西安710055

出　　处：《环境科学与技术》2013年第9期41-44,共4页Environmental Science & Technology

基　　金：国家科技支撑计划(2012BAC04B02)

摘　　要：通过实验室静态模拟山东省枣庄市周村水库沉积物污染物在冬季(t=4℃)与夏季(t=10℃)的释放情况,分析周村水库沉积物中氮、磷、铁、锰等污染物释放的潜力。由于周村水库內源污染严重,上覆水体DO在t=4℃与t=10℃的消耗速率分别为1.6、1.9mg(/m2·d);当DO<2 mg/L时,上覆水体中NH3-N浓度便开始上升,在t=4℃与t=10℃,沉积物中NH3-N的释放速率分别为18.9、19.9mg(/m2·d),其浓度在相应条件下达到6.09、6.89 mg/L;DO<1 mg/L时,沉积物中磷开始释放,t=4℃与t=10℃时,TP的释放速率分别为18.9、19.2 mg(/m2·d),其浓度在相应条件下达到0.25、0.51 mg/L;当DO<1 mg/L时,沉积物中Fe2+与Mn2+均开始释放,t=4℃时,Fe2+、Mn2+释放速率分别为0.35、0.49 mg(/m2·d),相应指标浓度达到0.82、1.39 mg/L,t=10℃时,Fe2+、Mn2+释放速率分别为0.38、1.03 mg(/m2·d),相应指标浓度达到0.82、1.52 mg/L。Potential release of nitrogen, phosphorus, ferrous ion and manganese ion were analyzed through static experiment simulating release of sediment pollutants in summer and winter at Zhoucun Reservoir, Zhaozhuang City, Shandong Province. As the intemal pollution of sediment is serious, the consumption rates of DO in overlying water at 4℃and 10℃ are 1.6 and 1.9 mg/（m2.d） respectively. When DO is less than 2 mg/L in overlying water, the concentration of NHa-N in overlying water grows, with release rates of NH3-N at 4 ℃ and 10 ℃ as 18.9 and 19.9 mg/（m2.d） respectively. As a result, the concentration of NH3-N in overlying water at 4 ℃ and 10 ℃ are 6.09 and 6.89 mg/L. The phosphorus releases, if DO is less than 1 mg/L in overlying water, the release rates of TP at 4 ℃and 10 ℃ are 18.9 and 19.2 mg/（m2.d） respectively, with the concentration of TP in overlying water as 0.25 and 0.51 mg/L. When DO is less than 1 mg/L in overlying water, the release of ferrous and manganese in sediment begins. The release rates of ferrous and manganese at 4 ℃ are 0.35 and 0.49 mg/（m2.d） respectively, with the concentration of ferrous and manganese in overlying water as 0.82 and 1.39 mg/L. The release rates of ferrous and manganese at 10℃are 0.38 and 1.03 mg/（m2.d） respectively, with the concentration of ferrous and manganese in overlying water at 10℃ as 0.82 and 1.52 mg/L.

关 键 词：水库 沉积物 污染物 释放潜力 

分 类 号：X524[环境科学与工程—环境工程]