Glomalin-related soil protein: The particle aggregation mechanism and its insight into coastal environment improvement

Glomalin-related soil protein (GRSP), a ubiquitous microbial product, plays a crucial role in particle aggregation and metal adsorption, but the underlying mechanisms remain unknown. Here, GRSP fraction was extracted from estuarine ecosystems and systematically characterized to elucidate the aggrega...

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Autores principales:	Qiang Wang, Hualong Hong, Ran Liao, Bo Yuan, Hanyi Li, Haoliang Lu, Jingchun Liu, Chongling Yan
Formato:	article
Lenguaje:	EN
Publicado:	Elsevier 2021
Materias:	Estuarine ecosystem Glomalin-related soil protein Aggregation mechanism Chemical characterization Metal adsorption Environmental pollution TD172-193.5 Environmental sciences GE1-350
Acceso en línea:	https://doaj.org/article/81b08549534e4a84899820f7e108ecb5
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id	oai:doaj.org-article:81b08549534e4a84899820f7e108ecb5
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spelling	oai:doaj.org-article:81b08549534e4a84899820f7e108ecb52021-11-06T04:18:47ZGlomalin-related soil protein: The particle aggregation mechanism and its insight into coastal environment improvement0147-651310.1016/j.ecoenv.2021.112940https://doaj.org/article/81b08549534e4a84899820f7e108ecb52021-12-01T00:00:00Zhttp://www.sciencedirect.com/science/article/pii/S0147651321010526https://doaj.org/toc/0147-6513Glomalin-related soil protein (GRSP), a ubiquitous microbial product, plays a crucial role in particle aggregation and metal adsorption, but the underlying mechanisms remain unknown. Here, GRSP fraction was extracted from estuarine ecosystems and systematically characterized to elucidate the aggregation mechanisms and its impact on coastal environment improvement. We found that GRSP fraction (gravimetric mass of extracted GRSP, 5.1–24.3 mg g−1) was a globally relevant novel bioflocculant and that protein (linked to Bradford protein assay, 1.64–4.37 mg g−1) was the active flocculant constituent. The zeta potential, FTIR, XPS, and 13C NMR analyses identified its key constituents and structure, and revealed that the charge neutralization and bridging were GRSP fraction aggregation mechanisms. Thermogravimetric-infrared spectrometry analysis showed that GRSP fraction was highly thermostable, and the main volatile pyrolysis products included H2O, CO2, CO, and CH4. The SEM-EDX and XPS Fe valence spectroscopy suggested that GRSP fraction contained rich Fe (11.91 ± 0.48%) and could form Fe-rich flocs with particles. We also found that GRSP fraction has a high adsorption capacity (76–95%) for Cu, Zn, Pb and Cd, and its flocculation properties provide new insights into metal adsorption. The analysis of particle aggregation mechanism and its metal adsorption capacity is of great significance to elucidate the role of GRSP fraction in coastal environment improvement.Qiang WangHualong HongRan LiaoBo YuanHanyi LiHaoliang LuJingchun LiuChongling YanElsevierarticleEstuarine ecosystemGlomalin-related soil proteinAggregation mechanismChemical characterizationMetal adsorptionEnvironmental pollutionTD172-193.5Environmental sciencesGE1-350ENEcotoxicology and Environmental Safety, Vol 227, Iss , Pp 112940- (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	Estuarine ecosystem Glomalin-related soil protein Aggregation mechanism Chemical characterization Metal adsorption Environmental pollution TD172-193.5 Environmental sciences GE1-350
spellingShingle	Estuarine ecosystem Glomalin-related soil protein Aggregation mechanism Chemical characterization Metal adsorption Environmental pollution TD172-193.5 Environmental sciences GE1-350 Qiang Wang Hualong Hong Ran Liao Bo Yuan Hanyi Li Haoliang Lu Jingchun Liu Chongling Yan Glomalin-related soil protein: The particle aggregation mechanism and its insight into coastal environment improvement
description	Glomalin-related soil protein (GRSP), a ubiquitous microbial product, plays a crucial role in particle aggregation and metal adsorption, but the underlying mechanisms remain unknown. Here, GRSP fraction was extracted from estuarine ecosystems and systematically characterized to elucidate the aggregation mechanisms and its impact on coastal environment improvement. We found that GRSP fraction (gravimetric mass of extracted GRSP, 5.1–24.3 mg g−1) was a globally relevant novel bioflocculant and that protein (linked to Bradford protein assay, 1.64–4.37 mg g−1) was the active flocculant constituent. The zeta potential, FTIR, XPS, and 13C NMR analyses identified its key constituents and structure, and revealed that the charge neutralization and bridging were GRSP fraction aggregation mechanisms. Thermogravimetric-infrared spectrometry analysis showed that GRSP fraction was highly thermostable, and the main volatile pyrolysis products included H2O, CO2, CO, and CH4. The SEM-EDX and XPS Fe valence spectroscopy suggested that GRSP fraction contained rich Fe (11.91 ± 0.48%) and could form Fe-rich flocs with particles. We also found that GRSP fraction has a high adsorption capacity (76–95%) for Cu, Zn, Pb and Cd, and its flocculation properties provide new insights into metal adsorption. The analysis of particle aggregation mechanism and its metal adsorption capacity is of great significance to elucidate the role of GRSP fraction in coastal environment improvement.
format	article
author	Qiang Wang Hualong Hong Ran Liao Bo Yuan Hanyi Li Haoliang Lu Jingchun Liu Chongling Yan
author_facet	Qiang Wang Hualong Hong Ran Liao Bo Yuan Hanyi Li Haoliang Lu Jingchun Liu Chongling Yan
author_sort	Qiang Wang
title	Glomalin-related soil protein: The particle aggregation mechanism and its insight into coastal environment improvement
title_short	Glomalin-related soil protein: The particle aggregation mechanism and its insight into coastal environment improvement
title_full	Glomalin-related soil protein: The particle aggregation mechanism and its insight into coastal environment improvement
title_fullStr	Glomalin-related soil protein: The particle aggregation mechanism and its insight into coastal environment improvement
title_full_unstemmed	Glomalin-related soil protein: The particle aggregation mechanism and its insight into coastal environment improvement
title_sort	glomalin-related soil protein: the particle aggregation mechanism and its insight into coastal environment improvement
publisher	Elsevier
publishDate	2021
url	https://doaj.org/article/81b08549534e4a84899820f7e108ecb5
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Glomalin-related soil protein: The particle aggregation mechanism and its insight into coastal environment improvement

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