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Phosphorus removal and mechanisms by Zn-layered double hydroxide (Zn-LDHs)-modified zeolite substrates in a constructed rapid infiltration system

This work presents novel materials, ZnFe-LDHs-modified (Zn(2+) : Fe(3+) molar ratio of 2 : 1 and 3 : 1) and ZnAl-LDHs-modified (Zn(2+) : Al(3+) molar ratio of 2 : 1 and 3 : 1) zeolites, which were synthesized under alkaline conditions via a co-precipitation method and coated in situ on original zeol...

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Autores principales: Zhang, Xiangling, Gao, Jingtian, Lei, Yu, Xu, Zhouying, Xia, Shibin, Jiang, Yinghe, Cheng, Jing
Formato: Online Artículo Texto
Lenguaje:English
Publicado: The Royal Society of Chemistry 2019
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC9076088/
https://www.ncbi.nlm.nih.gov/pubmed/35541383
http://dx.doi.org/10.1039/c9ra04826j
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author Zhang, Xiangling
Gao, Jingtian
Lei, Yu
Xu, Zhouying
Xia, Shibin
Jiang, Yinghe
Cheng, Jing
author_facet Zhang, Xiangling
Gao, Jingtian
Lei, Yu
Xu, Zhouying
Xia, Shibin
Jiang, Yinghe
Cheng, Jing
author_sort Zhang, Xiangling
collection PubMed
description This work presents novel materials, ZnFe-LDHs-modified (Zn(2+) : Fe(3+) molar ratio of 2 : 1 and 3 : 1) and ZnAl-LDHs-modified (Zn(2+) : Al(3+) molar ratio of 2 : 1 and 3 : 1) zeolites, which were synthesized under alkaline conditions via a co-precipitation method and coated in situ on original zeolites. The as-prepared LDHs-modified zeolites were used as substrates for a constructed rapid infiltration system (CRIS) to conduct purification experiments to investigate the phosphorus removal performance of all types of zeolites. The experimental results showed that the phosphorus removal rates of the Zn-LDHs-modified zeolites reached over 80%, which are superior to that of the original zeolites. Furthermore, isothermal adsorption and adsorption kinetic experiments were conducted to explore the adsorption mechanisms. The theoretical maximumadsorption capacities were efficiently enhanced owing to the Zn-LDHs coating strategy. Especially, that of the ZnFe-LDHs-modified (3 : 1) zeolites reached 434.78 mg kg(−1), which is much higher than that of the original zeolites. Meanwhile, according to the fitting results of the adsorption kinetics experiments, it was found that the predominant adsorption type of the original zeolites was converted from intrinsically weak physical adsorption into more stable chemical adsorption by the Zn-LDHs coating. Furthermore, high-throughput sequencing was also exerted to uncover the phosphorus removal mechanism by microorganisms. The obtained results indicate that the relative abundance of Pseudomonas and Dechloromonas, which are closely related to phosphorus removal, effectively increased. Overall, the Zn-LDHs-modified zeolites improved the phosphorus removal performance efficiently and sustainably when applied in CRIS.
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spelling pubmed-90760882022-05-09 Phosphorus removal and mechanisms by Zn-layered double hydroxide (Zn-LDHs)-modified zeolite substrates in a constructed rapid infiltration system Zhang, Xiangling Gao, Jingtian Lei, Yu Xu, Zhouying Xia, Shibin Jiang, Yinghe Cheng, Jing RSC Adv Chemistry This work presents novel materials, ZnFe-LDHs-modified (Zn(2+) : Fe(3+) molar ratio of 2 : 1 and 3 : 1) and ZnAl-LDHs-modified (Zn(2+) : Al(3+) molar ratio of 2 : 1 and 3 : 1) zeolites, which were synthesized under alkaline conditions via a co-precipitation method and coated in situ on original zeolites. The as-prepared LDHs-modified zeolites were used as substrates for a constructed rapid infiltration system (CRIS) to conduct purification experiments to investigate the phosphorus removal performance of all types of zeolites. The experimental results showed that the phosphorus removal rates of the Zn-LDHs-modified zeolites reached over 80%, which are superior to that of the original zeolites. Furthermore, isothermal adsorption and adsorption kinetic experiments were conducted to explore the adsorption mechanisms. The theoretical maximumadsorption capacities were efficiently enhanced owing to the Zn-LDHs coating strategy. Especially, that of the ZnFe-LDHs-modified (3 : 1) zeolites reached 434.78 mg kg(−1), which is much higher than that of the original zeolites. Meanwhile, according to the fitting results of the adsorption kinetics experiments, it was found that the predominant adsorption type of the original zeolites was converted from intrinsically weak physical adsorption into more stable chemical adsorption by the Zn-LDHs coating. Furthermore, high-throughput sequencing was also exerted to uncover the phosphorus removal mechanism by microorganisms. The obtained results indicate that the relative abundance of Pseudomonas and Dechloromonas, which are closely related to phosphorus removal, effectively increased. Overall, the Zn-LDHs-modified zeolites improved the phosphorus removal performance efficiently and sustainably when applied in CRIS. The Royal Society of Chemistry 2019-12-02 /pmc/articles/PMC9076088/ /pubmed/35541383 http://dx.doi.org/10.1039/c9ra04826j Text en This journal is © The Royal Society of Chemistry https://creativecommons.org/licenses/by-nc/3.0/
spellingShingle Chemistry
Zhang, Xiangling
Gao, Jingtian
Lei, Yu
Xu, Zhouying
Xia, Shibin
Jiang, Yinghe
Cheng, Jing
Phosphorus removal and mechanisms by Zn-layered double hydroxide (Zn-LDHs)-modified zeolite substrates in a constructed rapid infiltration system
title Phosphorus removal and mechanisms by Zn-layered double hydroxide (Zn-LDHs)-modified zeolite substrates in a constructed rapid infiltration system
title_full Phosphorus removal and mechanisms by Zn-layered double hydroxide (Zn-LDHs)-modified zeolite substrates in a constructed rapid infiltration system
title_fullStr Phosphorus removal and mechanisms by Zn-layered double hydroxide (Zn-LDHs)-modified zeolite substrates in a constructed rapid infiltration system
title_full_unstemmed Phosphorus removal and mechanisms by Zn-layered double hydroxide (Zn-LDHs)-modified zeolite substrates in a constructed rapid infiltration system
title_short Phosphorus removal and mechanisms by Zn-layered double hydroxide (Zn-LDHs)-modified zeolite substrates in a constructed rapid infiltration system
title_sort phosphorus removal and mechanisms by zn-layered double hydroxide (zn-ldhs)-modified zeolite substrates in a constructed rapid infiltration system
topic Chemistry
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC9076088/
https://www.ncbi.nlm.nih.gov/pubmed/35541383
http://dx.doi.org/10.1039/c9ra04826j
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