环境条件变化对太湖沉积物磷释放的影响  

THE EFFECTS OF THE ENVIRONMENTAL CONDITIONS ON PHOSPHORUS RELEASE IN LAKE SEDIMENTS

作　　者：王晓蓉[1] 华兆哲[1] 徐菱 赵闯 吴重华[1] 

机构地区：[1]南京大学环境科学与工程系,南京210093

出　　处：《环境化学》1996年第1期15-19,共5页Environmental Chemistry

基　　金：国家自然科学基金资助项目

摘　　要：本文系统研究了环境条件变化对太湖沉积物磷释放的影响.结果表明:温度、pH、氧化还原条件对沉积物磷释放有很大影响,获得了在不同环境条件下磷释放的方程.结果还表明,厌氧条件下(DO<1.0mg·1^(-1))沉积物磷的最大释放量明显高于好氧条件(DO>8.0mg·1^(-1)),其释放速率分别为 3.14μg·g^(-1)·d^(-1)和2.75μg·g^(-1)·d^(-1),相应的动力学方程可表示为C_p=Ae^(-b/t).观察到藻与沉积物共存时,沉积物磷的释放量明显增加.此外,在沉积物释放磷过程中,发现磷形态之间的迁移转化.In this paper, the effects of the environmental conditions on phosphorus release from the sediments in Taihu lake was investigated.The results indicated that-temperature, pH, redox play important role for phosphorus release. Relational equation of phosphorus release under different environmental conditions was obtained. The results also showed that the maximum value of phosphorus released under anaerobic condition (DO<1.0mg · l-1)is significantly more than that under aerobic condition(DO>8. 0mg ·1-1). Their release rates are 3. 14μg · g-1 · d-1 and 2. 75μg · g-1 · d-1, respectively. The kinetic equations of phosphorus release may be written as Cp=Ae-b/t on the basis of experimental data. The significant increase for amount ot phosphorus released was observed in algae-sediment coexistant system. The transformation between various phosphorus species were discovered during kinetic processes of phosphorus release in sediment under anaerobic condition;

关 键 词：湖泊沉积物 磷释放 磷形态 环境条件 

分 类 号：X524.02[环境科学与工程—环境工程]