作　　者： ; ; ; ; ;

机构地区： 广东药学院公共卫生学院

出　　处： 《中国卫生检验杂志》 2012年第7期1563-1566,共4页

摘　　要： 目的:为开发污染底泥的有效治理方法,对硝酸钙控制底泥氮、磷及有机物释放的效果进行了研究。方法:通过模拟实验,在增氧及缺氧条件下采用硝酸钙处理底泥。结果:上覆水中的氨氮和总氮浓度在增氧条件下先增加后降低,而在缺氧条件下基本呈增大趋势。总磷浓度在增氧条件下呈降低趋势,而在缺氧条件下基本呈增大趋势,两条件下硝酸钙均抑制磷的释放,抑制作用随硝酸钙投加量增大而增大。化学需氧量(COD)在增氧条件下先增大后下降,而在缺氧条件下影响不明显。结论:硝酸钙可抑制底泥释放污染物,可成为底泥原位处理的一种技术方法。 Objective：In order to find out the effective treatment technologies of polluted sediment,the effect of calcium nitrate on control of the release of nitrogen,phosphorus and organic matter from sediment was studied.Methods： Based on laboratory simulated test,calcium nitrate was applied to sediment treatment in aerobic and anoxic conditions.Results： Ammonia nitrogen and total nitrogen concentration in overlying water increased at first and decreased subsequently in aerobic condition,while kept increasing in anoxic condition.Total phosphorus（TP） concentration kept decreasing in aerobic condition,while kept increasing in anoxic condition.Calcium nitrate suppressed TP release and inhibition effect increased with the additive amount of calcium nitrate in both conditions.Chemical oxygen demand（COD） value increased at first and decreased subsequently in aerobic condition,while that wasn′t influenced obviously in anoxic condition.Conclusion： Calcium nitrate could suppress the release of pollutants from sediment effectively,and would become a technique in situ sediment treatment.

关 键 词： 底泥 硝酸钙 增氧条件 缺氧条件 氮 磷 有机物

领　　域： [环境科学与工程]