赤泥投加控制河道底泥磷释放的影响因素  

Influencing factors of red mud for controlling phosphorus release from river sediments

作　　者：程雅靖[1] 单保庆[1] 张洪[1] 刘红磊[1] 

机构地区：[1]中国科学院生态环境研究中心环境水质学国家重点实验室,北京100085

出　　处：《环境工程学报》2012年第3期761-766,共6页Chinese Journal of Environmental Engineering

基　　金：天津市科技创新专项资金资助项目(06FZZDSH00900);国家"水体污染控制与治理"科技重大专项(2008ZX07209-006);中国科学院知识创新重大工程项目(KZCX1-YW-06-02)

摘　　要：通过对不同赤泥投加比例下河道底泥磷释放作用的研究,发现底泥中铁铝磷与钙磷的比值(Fe/Al-P∶Ca-P)、铁磷比(Fe∶TP)及有机质含量(OM)是赤泥能否应用于河道底泥磷释放控制中的决定性因素。实验结果表明,只有当河道底泥中Fe/Al-P∶Ca-P小于0.88,Fe∶TP小于16.1,且有机质含量低于1.87%时,投加适量赤泥才能起到抑制河道底泥内源磷释放的作用;反之,赤泥的投加则有可能促进底泥内源磷的释放。在实际工程应用中,推荐赤泥与底泥的接触时间不低于7d,从而使赤泥的效能发挥到最佳状态。The effect of different sediments phosphorus release by adding dried red mud was studied.The results showed that the Fe/Al-P∶ Ca-P,Fe∶ TP and organic matter content in sediments were the decisive factors that red mud could be applied to control sediment phosphorus release.The addition of red mud will inhibit sediment phosphorus releases while the Fe/Al-P∶ Ca-P less than 0.88,Fe∶ TP lower than 16.1,and organic matter content lower than 1.87% in the river sediment.Otherwise,red mud dosage would lead to a substantial increase of sediment phosphorus release.It was suggested that the contact time of red mud and sediment should be more than 7 d to ensure the best effect in practical engineering.

关 键 词：赤泥 河道底泥 磷释放 

分 类 号：X522[环境科学与工程—环境工程]