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引用本文:张巧颖,杜瑛珣,罗春燕,刘正文.镧改性膨润土钝化湖泊中的磷及其生态风险的研究进展.湖泊科学,2019,31(6):1499-1509. DOI:10.18307/2019.0620
ZHANG Qiaoying,DU Yingxun,LUO Chunyan,LIU Zhengwen.Advances in researches on phosphorus immobilization by lanthanum modified bentonite in lakes and its ecological risk. J. Lake Sci.2019,31(6):1499-1509. DOI:10.18307/2019.0620
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镧改性膨润土钝化湖泊中的磷及其生态风险的研究进展
张巧颖1,2, 杜瑛珣1, 罗春燕1,2, 刘正文1
1.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, 南京 210008;2.中国科学院大学, 北京 100049
摘要:
磷的过度输入是湖泊富营养化的关键原因,由于内源(沉积物)磷的释放,即使外源磷输入得到控制,富营养化湖泊的水质仍难以改善.近年来,利用镧改性膨润土(lanthanum modified bentonite,LMB)原位钝化沉积物中的磷,抑制湖泊内源磷释放备受关注.为了更好地理解和应用镧改性膨润土钝化磷技术,本文首先介绍镧改性膨润土的组成和其钝化磷的原理,其次梳理LMB磷钝化技术在富营养化湖泊中的应用效果,再分析影响LMB钝化磷效率的因素,最后阐述LMB在应用过程中可能产生的生态风险;并根据以上分析,提出LMB磷钝化技术应用中需要注意的方面,对该技术的后续研究方向进行展望.
关键词:  镧改性膨润土  富营养化湖泊  沉积物  磷钝化  生态风险
DOI:10.18307/2019.0620
分类号:
基金项目:国家自然科学基金项目(41671099,41971139)和中国科学院STS项目(KFJ-STS-ZDTP-038)联合资助.
Advances in researches on phosphorus immobilization by lanthanum modified bentonite in lakes and its ecological risk
ZHANG Qiaoying1,2, DU Yingxun1, LUO Chunyan1,2, LIU Zhengwen1
1.Nanjing Institute of Geography and Limnology, State Key Laboratory of Lake Science and Environment, Chinese Academy of Sciences, Nanjing 210008, P. R. China;2.University of Chinese Academy of Sciences, Beijing 100049, P. R. China
Abstract:
Phosphorous(P) has been considered a key factor in inducing eutrophication. The internal P loading(mainly P release from the sediment) has been found to delay the lake recovery following the reduction of external loading from the watershed. The control of internal loading by chemical immobilization of P using the lanthanum(La) modified bentonite(LMB) has been widely applied in recent years. This paper reviews the advances in the immobilization of P by LMB, including the following aspects:(1) the composition of LMB and mechanism of LMB to immobilize P;(2) the response of P and lake ecosystem to LMB treatment;(3) the factors affecting the treatment efficiency of LMB technology, and(4) the possible ecological risks in the application LMB. After that, the cautions during the LMB application are pointed out and the possible research in this field is proposed.
Key words:  Lanthanum modified bentonite  eutrophic lakes  sediment  phosphorus immobilization  ecological risk
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