Effects of Lanthanum Modified Bentonite and Polyaluminium Chloride on the Environmental Variables in the Water and Sediment Phosphorus Form in Lake Yanglan, China

The application of lanthanum modified bentonite (Phoslock<sup>®</sup>) and polyaluminium chloride (PAC) is popular in the restoration of European temperate lakes; however, the effects of the application on the concentrations of phosphorus (P) in both the water and the sediments have been...

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Main Authors: Ling Su, Chen Zhong, Lei Gan, Xiaolin He, Jinlei Yu, Xiumei Zhang, Zhengwen Liu
Format: Article
Language:English
Published: MDPI AG 2021-07-01
Series:Water
Subjects:
Online Access:https://www.mdpi.com/2073-4441/13/14/1947
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spelling doaj-b50885cb81324d9d8f7ce8ba651a686c2021-07-23T14:12:10ZengMDPI AGWater2073-44412021-07-01131947194710.3390/w13141947Effects of Lanthanum Modified Bentonite and Polyaluminium Chloride on the Environmental Variables in the Water and Sediment Phosphorus Form in Lake Yanglan, ChinaLing Su0Chen Zhong1Lei Gan2Xiaolin He3Jinlei Yu4Xiumei Zhang5Zhengwen Liu6Institute of Hydrobiology and Department of Ecology, Jinan University, Guangzhou 510632, ChinaChina Gezhouba Group Water Operation Company LTD, Wuhan 430033, ChinaInstitute of Hydrobiology and Department of Ecology, Jinan University, Guangzhou 510632, ChinaBeisun Environmental Technology Company LTD, Guangzhou 510623, ChinaState Key Laboratory of Lake Science and Environment, Nanjing Institute of Geography and Limnology, Chinese Academy of Sciences, Nanjing 210008, ChinaState Key Laboratory of Lake Science and Environment, Nanjing Institute of Geography and Limnology, Chinese Academy of Sciences, Nanjing 210008, ChinaInstitute of Hydrobiology and Department of Ecology, Jinan University, Guangzhou 510632, ChinaThe application of lanthanum modified bentonite (Phoslock<sup>®</sup>) and polyaluminium chloride (PAC) is popular in the restoration of European temperate lakes; however, the effects of the application on the concentrations of phosphorus (P) in both the water and the sediments have been poorly evaluated to date. We studied the effects of the application of Phoslock<sup>®</sup> + PAC on the concentrations of total phosphorus (TP), particulate phosphorus (PP), soluble reactive phosphorus (SRP), total suspended solids (TSS) and chlorophyll <i>a</i> (Chl<i>a</i>) in the water, and different P forms in the sediments, in an isolated part of Lake Yanglan. The results showed that the concentrations of TP, PP, SRP, TSS and Chl<i>a</i> decreased significantly after the addition of Phoslock<sup>®</sup> + PAC. Moreover, the concentrations of labile-P, reductant-soluble-P and organic-P in the sediments were also significantly decreased after the Phoslock<sup>®</sup> + PAC application. However, the concentrations of both the stable apatite-P and residual-P in the sediments after application of Phoslock<sup>®</sup> + PAC were much higher than the pre-addition values, while the concentrations of metal-oxide-P did not differ significantly between the pre- and post- application conditions. Our findings imply that the combined application of Phoslock<sup>®</sup> and PAC can be used in the restoration of subtropical shallow lakes, to reduce the concentrations of P in the water and suppress the release of P from the sediments.https://www.mdpi.com/2073-4441/13/14/1947lake restorationlanthanum-modified bentonitepolyaluminium chloridesediment phosphorus formswater quality
collection DOAJ
language English
format Article
sources DOAJ
author Ling Su
Chen Zhong
Lei Gan
Xiaolin He
Jinlei Yu
Xiumei Zhang
Zhengwen Liu
spellingShingle Ling Su
Chen Zhong
Lei Gan
Xiaolin He
Jinlei Yu
Xiumei Zhang
Zhengwen Liu
Effects of Lanthanum Modified Bentonite and Polyaluminium Chloride on the Environmental Variables in the Water and Sediment Phosphorus Form in Lake Yanglan, China
Water
lake restoration
lanthanum-modified bentonite
polyaluminium chloride
sediment phosphorus forms
water quality
author_facet Ling Su
Chen Zhong
Lei Gan
Xiaolin He
Jinlei Yu
Xiumei Zhang
Zhengwen Liu
author_sort Ling Su
title Effects of Lanthanum Modified Bentonite and Polyaluminium Chloride on the Environmental Variables in the Water and Sediment Phosphorus Form in Lake Yanglan, China
title_short Effects of Lanthanum Modified Bentonite and Polyaluminium Chloride on the Environmental Variables in the Water and Sediment Phosphorus Form in Lake Yanglan, China
title_full Effects of Lanthanum Modified Bentonite and Polyaluminium Chloride on the Environmental Variables in the Water and Sediment Phosphorus Form in Lake Yanglan, China
title_fullStr Effects of Lanthanum Modified Bentonite and Polyaluminium Chloride on the Environmental Variables in the Water and Sediment Phosphorus Form in Lake Yanglan, China
title_full_unstemmed Effects of Lanthanum Modified Bentonite and Polyaluminium Chloride on the Environmental Variables in the Water and Sediment Phosphorus Form in Lake Yanglan, China
title_sort effects of lanthanum modified bentonite and polyaluminium chloride on the environmental variables in the water and sediment phosphorus form in lake yanglan, china
publisher MDPI AG
series Water
issn 2073-4441
publishDate 2021-07-01
description The application of lanthanum modified bentonite (Phoslock<sup>®</sup>) and polyaluminium chloride (PAC) is popular in the restoration of European temperate lakes; however, the effects of the application on the concentrations of phosphorus (P) in both the water and the sediments have been poorly evaluated to date. We studied the effects of the application of Phoslock<sup>®</sup> + PAC on the concentrations of total phosphorus (TP), particulate phosphorus (PP), soluble reactive phosphorus (SRP), total suspended solids (TSS) and chlorophyll <i>a</i> (Chl<i>a</i>) in the water, and different P forms in the sediments, in an isolated part of Lake Yanglan. The results showed that the concentrations of TP, PP, SRP, TSS and Chl<i>a</i> decreased significantly after the addition of Phoslock<sup>®</sup> + PAC. Moreover, the concentrations of labile-P, reductant-soluble-P and organic-P in the sediments were also significantly decreased after the Phoslock<sup>®</sup> + PAC application. However, the concentrations of both the stable apatite-P and residual-P in the sediments after application of Phoslock<sup>®</sup> + PAC were much higher than the pre-addition values, while the concentrations of metal-oxide-P did not differ significantly between the pre- and post- application conditions. Our findings imply that the combined application of Phoslock<sup>®</sup> and PAC can be used in the restoration of subtropical shallow lakes, to reduce the concentrations of P in the water and suppress the release of P from the sediments.
topic lake restoration
lanthanum-modified bentonite
polyaluminium chloride
sediment phosphorus forms
water quality
url https://www.mdpi.com/2073-4441/13/14/1947
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