镧改性膨润土应用于自然水体的控磷效果及其水生态影响研究进展

刘帅; 沈剑; 汪金辉; 迟莉娜; 刘华基; 封吉猛; 王欣泽

doi:10.13205/j.hjgc.202502013

镧改性膨润土应用于自然水体的控磷效果及其水生态影响研究进展

doi: 10.13205/j.hjgc.202502013

刘帅^1,2,
沈剑^1,2,3,
汪金辉^1,2,
迟莉娜^1,2,
刘华基^1,2,
封吉猛^1,2,3,
王欣泽^1,2,3, ,

1. 上海交通大学环境科学与工程学院, 上海 200240;
2. 云南洱海湖泊生态系统国家野外科学观测研究站, 云南大理 671000;
3. 上海交通大学云南(大理)研究院, 云南大理 671000

基金项目:

国家重点研发计划(2024YFD1700100)

云南省重点研发计划(202003AD150015,202303AC100017)

云南省基础研究计划(202301AT070001)

详细信息

作者简介:
刘帅(1997-),女,硕士研究生,主要研究方向为水污染控制工程。liushuai1@sjtu.edu.cn

通讯作者:
王欣泽(1974-),男,博士,研究员,主要研究方向为水污染控制工程。xinzewang@sjtu.edu.cn

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出版历程
- 收稿日期: 2024-03-20
- 录用日期: 2024-08-14
- 修回日期: 2024-06-17

Research on phosphorus control effect of lanthanum-modified bentonite applied to natural water bodies and its aquatic ecological impacts

LIU Shuai^1,2,
SHEN Jian^1,2,3,
WANG Jinhui^1,2,
CHI Lina^1,2,
LIU Huaji^1,2,
FENG Jimeng^1,2,3,
WANG Xinze^{1,2,3
, ,}

1. School of Environmental Science and Engineering, Shanghai Jiao Tong University, Shanghai 200240, China;
2. National Observation and Research Station of Erhai Lake Ecosystem in Yunnan, Dali 671000, China;
3. Yunnan Dali Research Institute of Shanghai Jiao Tong University, Dali 671000, China

摘要

摘要: 镧改性膨润土(LMB)因其对磷酸根有强亲和力,可控制湖泊内源磷释放,广泛应用于全球众多水体中。从LMB控制内源磷机理出发,研究了其在多个自然水体应用后的镧La和P在水体和沉积物中浓度、分布变化,及其水生态影响。分析表明,pH值、碱度、硬度、竞争性阴离子浓度和DOC浓度等理化性质共同决定着LMB钝化效果,风力及底栖生物扰动、湖泊形态、修复剂应用剂量以及水文气候等其他因素也会影响LMB修复的长期性。其次,LMB在低碱度、低硬度等水体可能存在La渗出风险,La是否会在食物链上生物富集仍需要更长时间的监测分析。综上,LMB在应用于自然水体前需全面了解目标水体水文地理环境、水体理化性质等,并在进行大量实验后预估其可能产生的风险。
- 镧改性膨润土 /
- 自然水体 /
- 控磷 /
- 水生态
Abstract: Lanthanum-modified bentonite (LMB) is widely used to control the release of endogenous phosphorus in many water bodies worldwide due to its strong affinity to phosphate. In this paper, several field application cases of LMB at home and abroad were reviewed, and short-term and long-term water quality changes, ecological effects and long-term effectiveness of LMB after application were summarized, to provide references for the development of similar chemical covering materials and treatment of lake internal sources. Based on the mechanism of endogenous phosphorus control by LMB, this review discussed the concentration and distribution changes of lanthanum and phosphorus in water and sediment and their effects on water ecology after applying LMB in some natural water bodies. The analysis indicated that the effectiveness of LMB in immobilizing phosphorus is determined by the physicochemical properties of the water body, such as pH, alkalinity, hardness, concentration of competing anions, and DOC concentration. Additionally, factors like wind and benthic organism disturbances, lake morphology, dosage of the remediation agent, and hydrological and climatic conditions can also affect the long-term efficacy of LMB remediation. Furthermore, there is a risk of lanthanum leaching in water bodies with low alkalinity and hardness, and whether lanthanum will be bioaccumulated in the food chain still requires further long-term monitoring and analysis. In conclusion, before applying LMB in natural water bodies, it is essential to comprehensively understand the hydrological and geographical environment of the target water body, as well as its physicochemical properties, and then estimate the potential risk through extensive experimentation.
- lanthanum modified bentonite (LMB) /
- natural water /
- phosphorus control /
- aquatic ecology

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参考文献(118)

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