【作者】 朱健； 李捍东； 王平；

【Author】 Zhujian~1 Li-Handong~(2*) Wangping~1 (1 Resource and Environment Department,Central South University of Forestry & technology,Changsha 410004,China; 2.Chinese Research Academy of Environmental Science,Beijing,100012,China)

【机构】 中南林业科技大学资源与环境学院； 中国环境科学研究院；

【摘要】 通过室内模拟实验研究了环境因子溶解氧、温度、pH和扰动对底泥释放COD、TP、TN的影响。研究结果表明,溶解氧、温度、pH和扰动对底泥中COD、TP、TN的释放均有不同程度的影响。①不同溶解氧水平下,COD、TN、TP的释放量均随着溶解氧水平的降低而增加。②不同温度条件下,随着温度的升高,TN、TP的释放量不断增加,但COD在20℃释放量最大,在5℃释放量最小。③不同pH值时,TN、TP的释放量呈现"U"字形曲线,即中性条件下释放量最小,酸性和碱性条件下释放量都较大,碱性条件下的释放量略高于酸性条件。而COD的释放量随着pH的升高而降低。④不同扰动状态下,COD、TN、TP的释放量均随着扰动程度的加强而增大。更多还原

【Abstract】 The release of COD,TN,TP from sediment of Jiahe river was studied by this paper.The result showed that the DO,pH,temperatures,disturbance affected P release rates fron sediment.①Under different DO levels,the release rates of COD,TN,TP increased as DO increased.②Under different temperatures,as increase of temperature,TN,TP release rates was more and more higher.However,COD relrase rate was highest at 20℃,and was smallest at 5℃.③Under different pH,TN,TP release rate from sediment was highest at high pH and smallest at neutral pH.but COD release rate felled as pH increase.④COD,TN,TP release rates increased as disturbance added.更多还原