Phosphate and Ammonium Removal from Wastewaters Using Natural-Based Innovative Bentonites Impacting on Resource Recovery and Circular Economy

The research objective of the study is the estimation of a novel low-cost composite material <i>f</i>-MB (Fe-modified bentonite) as a P and N adsorbent from wastewaters. Τhe present study aimed at examining the phosphate and ammonium removal efficiency from different types of wastewater...

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Autores principales:	Miltiadis Zamparas, Grigorios L. Kyriakopoulos, Marios Drosos, Vasilis C. Kapsalis
Formato:	article
Lenguaje:	EN
Publicado:	MDPI AG 2021
Materias:	composite material <i>f</i>-MB wastewaters resource recovery fertilizers circular economy Organic chemistry QD241-441
Acceso en línea:	https://doaj.org/article/d98b9bb8f82d470a9bb99b7ccf46d964
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spelling	oai:doaj.org-article:d98b9bb8f82d470a9bb99b7ccf46d9642021-11-11T18:38:25ZPhosphate and Ammonium Removal from Wastewaters Using Natural-Based Innovative Bentonites Impacting on Resource Recovery and Circular Economy10.3390/molecules262166841420-3049https://doaj.org/article/d98b9bb8f82d470a9bb99b7ccf46d9642021-11-01T00:00:00Zhttps://www.mdpi.com/1420-3049/26/21/6684https://doaj.org/toc/1420-3049The research objective of the study is the estimation of a novel low-cost composite material <i>f</i>-MB (Fe-modified bentonite) as a P and N adsorbent from wastewaters. Τhe present study aimed at examining the phosphate and ammonium removal efficiency from different types of wastewater using <i>f</i>-MB, by conducting bench-scale batch experiments to investigate its equilibrium characteristics and kinetics. The SEM analysis revealed that the platelets of bentonite in <i>f</i>-MB do not form normal bentonite sheets, but they have been restructured in a more compact formation with a great porosity. Regarding the sorption efficiencies (Qm), the maximum phosphate sorption efficiencies (Qm) calculated using the Langmuir model were 24.54, 25.09, 26.13, 24.28, and 23.21 mg/g, respectively, for a pH range of 5 to 9. In addition, the maximum NH<sub>4</sub><sup>+</sup>-N adsorption capacities (Qm) calculated from the Langmuir model were 131.8, 145.7, 168.5, 156.7, and 159.6 mg/g, respectively, for a pH range from 5 to 9. Another important finding of this study is that <i>f</i>-MB can recover P from treated wastewater impacting on resource recovery and circular economy (CE). The modified clay <i>f</i>-MB performed the phosphate and ammonium recovery rates of 80% and 78.5%, respectively. Finally, <i>f</i>-MB can slowly release the largest proportion of phosphate and ammonium ions for a long time, thus extending the application of the <i>f</i>-MB material as a slow-release fertilizer and soil improver.Miltiadis ZamparasGrigorios L. KyriakopoulosMarios DrososVasilis C. KapsalisMDPI AGarticlecomposite material<i>f</i>-MBwastewatersresource recoveryfertilizerscircular economyOrganic chemistryQD241-441ENMolecules, Vol 26, Iss 6684, p 6684 (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	composite material <i>f</i>-MB wastewaters resource recovery fertilizers circular economy Organic chemistry QD241-441
spellingShingle	composite material <i>f</i>-MB wastewaters resource recovery fertilizers circular economy Organic chemistry QD241-441 Miltiadis Zamparas Grigorios L. Kyriakopoulos Marios Drosos Vasilis C. Kapsalis Phosphate and Ammonium Removal from Wastewaters Using Natural-Based Innovative Bentonites Impacting on Resource Recovery and Circular Economy
description	The research objective of the study is the estimation of a novel low-cost composite material <i>f</i>-MB (Fe-modified bentonite) as a P and N adsorbent from wastewaters. Τhe present study aimed at examining the phosphate and ammonium removal efficiency from different types of wastewater using <i>f</i>-MB, by conducting bench-scale batch experiments to investigate its equilibrium characteristics and kinetics. The SEM analysis revealed that the platelets of bentonite in <i>f</i>-MB do not form normal bentonite sheets, but they have been restructured in a more compact formation with a great porosity. Regarding the sorption efficiencies (Qm), the maximum phosphate sorption efficiencies (Qm) calculated using the Langmuir model were 24.54, 25.09, 26.13, 24.28, and 23.21 mg/g, respectively, for a pH range of 5 to 9. In addition, the maximum NH<sub>4</sub><sup>+</sup>-N adsorption capacities (Qm) calculated from the Langmuir model were 131.8, 145.7, 168.5, 156.7, and 159.6 mg/g, respectively, for a pH range from 5 to 9. Another important finding of this study is that <i>f</i>-MB can recover P from treated wastewater impacting on resource recovery and circular economy (CE). The modified clay <i>f</i>-MB performed the phosphate and ammonium recovery rates of 80% and 78.5%, respectively. Finally, <i>f</i>-MB can slowly release the largest proportion of phosphate and ammonium ions for a long time, thus extending the application of the <i>f</i>-MB material as a slow-release fertilizer and soil improver.
format	article
author	Miltiadis Zamparas Grigorios L. Kyriakopoulos Marios Drosos Vasilis C. Kapsalis
author_facet	Miltiadis Zamparas Grigorios L. Kyriakopoulos Marios Drosos Vasilis C. Kapsalis
author_sort	Miltiadis Zamparas
title	Phosphate and Ammonium Removal from Wastewaters Using Natural-Based Innovative Bentonites Impacting on Resource Recovery and Circular Economy
title_short	Phosphate and Ammonium Removal from Wastewaters Using Natural-Based Innovative Bentonites Impacting on Resource Recovery and Circular Economy
title_full	Phosphate and Ammonium Removal from Wastewaters Using Natural-Based Innovative Bentonites Impacting on Resource Recovery and Circular Economy
title_fullStr	Phosphate and Ammonium Removal from Wastewaters Using Natural-Based Innovative Bentonites Impacting on Resource Recovery and Circular Economy
title_full_unstemmed	Phosphate and Ammonium Removal from Wastewaters Using Natural-Based Innovative Bentonites Impacting on Resource Recovery and Circular Economy
title_sort	phosphate and ammonium removal from wastewaters using natural-based innovative bentonites impacting on resource recovery and circular economy
publisher	MDPI AG
publishDate	2021
url	https://doaj.org/article/d98b9bb8f82d470a9bb99b7ccf46d964
work_keys_str_mv	AT miltiadiszamparas phosphateandammoniumremovalfromwastewatersusingnaturalbasedinnovativebentonitesimpactingonresourcerecoveryandcirculareconomy AT grigorioslkyriakopoulos phosphateandammoniumremovalfromwastewatersusingnaturalbasedinnovativebentonitesimpactingonresourcerecoveryandcirculareconomy AT mariosdrosos phosphateandammoniumremovalfromwastewatersusingnaturalbasedinnovativebentonitesimpactingonresourcerecoveryandcirculareconomy AT vasilisckapsalis phosphateandammoniumremovalfromwastewatersusingnaturalbasedinnovativebentonitesimpactingonresourcerecoveryandcirculareconomy
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Phosphate and Ammonium Removal from Wastewaters Using Natural-Based Innovative Bentonites Impacting on Resource Recovery and Circular Economy

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