溶解氧对滇池沉积物氮磷释放特征影响研究  

Study of the Effects of Dissolved Oxygen on Nitrogen and Phosphate Release from the Sediment in Dianchi Lake

作　　者：杨艳 邓伟明 何佳 鲁露 邵智 Yang Yan;Deng Weiming;He Jia;Lu Lu;Shao Zhi(Kunming Institute of Environmental Sciences,Kunming 650032,China)

机构地区：[1]昆明市环境科学研究院,云南昆明650032

出　　处：《环境保护科学》2018年第5期36-41,共6页Environmental Protection Science

基　　金：国家水体污染控制与治理科技重大专项(2012ZX07102)基金资助

摘　　要：研究了不同溶解氧条件下对滇池沉积物氮磷释放特征的影响。结果表明溶解氧浓度梯度是滇池沉积物释放氨氮和磷酸盐的主要动力之一,滇池草海由于沉积物-水之间污染浓度差异较小,氨氮和磷酸盐释放速率小于滇池外海区域;好氧状态会抑制氨氮和可溶性正磷酸盐的释放。In this paper,the effects of different dissolved oxygen conditions on the release characteristics of nitrogen and phosphate from the sediments in Dianchi Lake were studied.The results showed that DO concentration gradient was the main driver of ammonia-nitrogen and phosphate release from the sediments.The pollutant concentration was changed in a narrow range in the sediment-water interface of Caohai,so the releasing rates of ammonia-nitrogen and phosphate were lower than those in the regions of Waihai.The release of ammonia-nitrogen and orthophosphate could be inhibited in the aerobic state.

关 键 词：滇池 溶解氧 沉积物 氮磷释放特征 

分 类 号：X522[环境科学与工程—环境工程]