环境因素对苏州河市区段底泥内源磷释放的影响  

Effect of Environmental Factors on Phosphorus Release from Sediments in Urban Reaches of Suzhou Creek

作　　者：侯立军[1] 刘敏[1] 许世远[1] 

机构地区：[1]华东师范大学地理系

出　　处：《上海环境科学》2003年第4期258-260,共3页Shanghai Environmental Sciences

基　　金：国家自然科学重点基金(40131020);国家自然科学基金(49801018);高等学校骨干教师计划资助项目;华东师范大学研究生科研基金

摘　　要：以苏州河市区段作为研究对象,利用实验模拟的方法,研究和探讨了环境因素(温度,pH,厌氧、好氧、微生物)对富含有机物的底泥内源磷释放的影响。结果表明:(1)在外界环境温度分别为5、10、15、25℃的条件下,底泥内源磷释放达到动态平衡时,上覆水中磷的含量分别为0.45、0.57、0.77、1.40mg/L,反映较低的环境温度不利于内源磷的释放;环境温度的升高,能够加速底泥磷的释放。(2)pH为5.0～8.0,底泥内源磷释放量较小;当pH升至11.0时,底泥的释磷量显著增加。(3)底泥中的有机物,在好氧状态下,能加速其内源磷的释放。(4)在微生物的作用下,底泥内源磷释放具有明显的增加趋势。Study on effect of environmental factors on phosphorus release from sediments which rich in organic matter in Suzhou Creek by simulated experiment has been conducted. The findings showed that when phosphorus release from sediments came to dynamic balance, the contents of phosphorus in the overlying waters were 0.45, 0.57, 0.77, 1.40 mg/L at 5, 10, 15and 25℃ respectively, indicating phosphorus release was less at lower temperature. When pH was between 5.0 and 8.0, the content of phosphorus release was smaller, but when pH was up to 11.0, the phosphorus release was obviously increased. Under aerobic condition, faster mineralization could stimulate sediments rich in organic matter to release phosphorus, meanwhile, phosphorus release was more at microorganisms than at nonmicroorganisms conditions.

关 键 词：环境因素 底泥 内源磷释放 苏州河 

分 类 号：X522[环境科学与工程—环境工程]