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

LIU Shuai; SHEN Jian; WANG Jinhui; CHI Lina; LIU Huaji; FENG Jimeng; WANG Xinze

doi:10.13205/j.hjgc.202502013

Volume 43 Issue 2

Feb. 2025

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LIU Shuai, SHEN Jian, WANG Jinhui, CHI Lina, LIU Huaji, FENG Jimeng, WANG Xinze. Research on phosphorus control effect of lanthanum-modified bentonite applied to natural water bodies and its aquatic ecological impacts[J]. ENVIRONMENTAL ENGINEERING , 2025, 43(2): 126-137. doi: 10.13205/j.hjgc.202502013

Citation:

LIU Shuai, SHEN Jian, WANG Jinhui, CHI Lina, LIU Huaji, FENG Jimeng, WANG Xinze. Research on phosphorus control effect of lanthanum-modified bentonite applied to natural water bodies and its aquatic ecological impacts[J]. ENVIRONMENTAL ENGINEERING , 2025, 43(2): 126-137. doi: 10.13205/j.hjgc.202502013

Citation:

LIU Shuai, SHEN Jian, WANG Jinhui, CHI Lina, LIU Huaji, FENG Jimeng, WANG Xinze. Research on phosphorus control effect of lanthanum-modified bentonite applied to natural water bodies and its aquatic ecological impacts[J]. ENVIRONMENTAL ENGINEERING , 2025, 43(2): 126-137. doi: 10.13205/j.hjgc.202502013

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

doi: 10.13205/j.hjgc.202502013

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

Received Date: 2024-03-20
Accepted Date: 2024-08-14
Rev Recd Date: 2024-06-17

Abstract

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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References(118)

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