三峡入库河流大宁河回水区消落带土壤氨氮释放动力学研究  

Release Kinetics of Ammonia Nitrogen from Soils of Water-level Fluctuating Zone in Input River of Three Georges Reservoir

作　　者：徐德星[1] 海热提[1] 郑丙辉[2] 秦延文[2] 张雷[2] 

机构地区：[1]北京化工大学环境工程系,北京100029 [2]中国环境科学研究院河流与海岸带环境研究室,北京100012

出　　处：《环境科学与技术》2010年第10期49-52,共4页Environmental Science & Technology

基　　金：科技部国际(中德)合作项目(2007DFA90510)

摘　　要：在室内模拟条件下,通过消落带土壤氨氮释放动力学实验,研究了三峡入库河流大宁河消落带土壤氨氮释放动力学特征,并分析了样品组成特征对释放动力学的影响,结果表明:(1)一级动力学方程可以很好的拟合大宁河回水区消落带土壤样品氨氮释放动力学特征,前120分钟为快反应,氨氮释放速度较大,随后进入慢反应,逐渐达到最大氨氮释放量;(2)土壤样品释放动力学特征与总氮、总磷呈现较好的相关性,与有机质、样品氧化物组成、颗粒组成理化指标相关性较弱;(3)土壤样品释放动力学特征与可转化态氮呈现极显著正相关关系,与非可转化态氮的相关性较弱,这说明样品中氨氮的释放量主要受其可转化态氮含量控制。研究结果可为三峡库区支流大宁河回水区富营养化治理提供参考和理论依据。Release kinetics characteristics of ammonia nitrogen from soil of water-level fluctuating zone in input river of Three Gorges Reservoir were studied in laboratory through release kinetic experiments,and relationship between sediment composition and its ammonia nitrogen release characteristics was also investigated. Results indicated that the first order kinetic equation can well describe ammonia nitrogen release characteristics of soil from water-level fluctuating zone. Process of ammonia nitrogen release f...

关 键 词：三峡入库河流 大宁河 回水区 消落带 氨氮 释放动力学 

分 类 号：X52[环境科学与工程—环境工程]