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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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 |
work_keys_str_mv |
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