镧铝改性凹凸棒粘土对富营养化湖泊有机磷控制效果  

Effects of lanthanum/aluminum modified attapulgite clay on organic phosphorus control in eutrophic lakes

作　　者：汪逸云 尹洪斌[3] 孔明 张毅敏 刘茹 WANG Yi-Yun;YIN Hong-bin;KONG Ming;ZHANG Yi-min;LIU Ru(College of Environment,Hohai University,Nanjing 210098,China;Nanjing Institute of Environmental Science,Ministry of Ecology and Environment,Nanjing 210042,China;State Key Laboratory of Lake Science and Environment,Nanjing Institute of Geography and Limnology,Chinese Academy of Sciences,Nanjing 210008,China)

机构地区：[1]河海大学环境学院,江苏南京210098 [2]生态环境部南京环境科学研究所,江苏南京210042 [3]中国科学院南京地理与湖泊研究所,湖泊与环境国家重点实验室,江苏南京210008

出　　处：《中国环境科学》2020年第9期3801-3809,共9页China Environmental Science

基　　金：中央高校基本科研业务费专项资金资助(2019B76414)。

摘　　要：通过吸附与原位模拟实验,研究了镧铝改性凹凸棒粘土(La/Al@ACP)对水体有机磷的吸附性能及其覆盖对沉积物磷释放的影响,并通过沉积物磷分级、DGT技术、扫描电镜能谱技术探讨材料覆盖对沉积物磷形态影响机制.结果显示,La/Al@ACP添加后,上覆水及底泥间隙水中磷含量显著下降,并伴随沉积物有效磷通量的减少.有机磷形态分析表明,添加La/Al@ACP后活性态的Lab-Po不断向稳定态的Hum-Po转化,有效控制了底泥磷向上覆水释放的风险.La/Al@ACP作为一种控制湖泊富营养化的有效材料,可用于底泥内源磷的固定与控制.Adsorption experiments and in situ simulation experiments were used to study the adsorption performance of lanthanum/aluminum modified attapulgite clay(La/Al@ACP)on organic phosphorus in water bodies as well as the effects of its coverage on the phosphorus release from sediments.Sediment phosphorus grading,DGT technique,and scanning electron microscope energy spectrum were used to examine the material coverage mechanism on sediment phosphorus.The results showed that the phosphorus content in the overlying water,sediment,and interstitial water significantly decreased after the addition of La/Al@ACP along with a decrease in the available phosphorus flux in the sediment.Analysis of the organic form of phosphorus showed that active Lab-Po were converted to stable Hum-Po after the addition of La/Al@ACP,which effectively controlled the risk of the release of phosphorus from the sediment to the overlying water.These results suggested that La/Al@ACP could be an effective material for controlling lake eutrophication,and be used for sediment phosphorus fixation and control.

关 键 词：镧铝改性凹土 沉积物 有机磷 磷形态 

分 类 号：X524[环境科学与工程—环境工程]