Formation of complexes between hematite nanoparticles and a non-conventional galactomannan gum. Toward a better understanding on interaction processes

The physicochemical characteristics of hematite nanoparticles related to their size, surface area and reactivity make them useful for many applications, as well as suitable models to study aggregation kinetics. For several applications (such as remediation of contaminated groundwater) it is crucial...

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Autores principales:	Busch, V.M., Loosli, F., Santagapita, P.R., Buera, M.P., Stoll, S.
Formato:	JOUR
Materias:	Aggregation kinetics Hematite nanoparticles Iron oxides Polymer-nanoparticle interaction Vinal gum Agglomeration Biomolecules Biopolymers Copolymers Dispersions Groundwater Groundwater pollution Hematite Remediation Stability Zeta potential Nanoparticle aggregation Nanoparticle tracking analysis Physicochemical characteristics Physicochemical property Polymer nanoparticles Nanoparticles galactomannan hematite nanoparticle nanoparticle unclassified drug vinal gum ferric ion ferric oxide mannan aggregation complexation hematite iron oxide particle size physicochemical property polymer polysaccharide reaction kinetics Article bioremediation chemical interaction complex formation concentration (parameters) dispersion molecular stability nonhuman pH physical chemistry polymerization priority journal Prosopis Prosopis ruscifolia static electricity stereochemistry surface property zeta potential chemical model chemistry kinetics Ferric Compounds Kinetics Mannans Models, Chemical Particle Size Static Electricity
Acceso en línea:	http://hdl.handle.net/20.500.12110/paper_00489697_v532_n_p556_Busch
Aporte de:	Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA) de Universidad de Buenos Aires

id	todo:paper_00489697_v532_n_p556_Busch
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spelling	todo:paper_00489697_v532_n_p556_Busch2023-10-03T14:52:33Z Formation of complexes between hematite nanoparticles and a non-conventional galactomannan gum. Toward a better understanding on interaction processes Busch, V.M. Loosli, F. Santagapita, P.R. Buera, M.P. Stoll, S. Aggregation kinetics Hematite nanoparticles Iron oxides Polymer-nanoparticle interaction Vinal gum Agglomeration Biomolecules Biopolymers Copolymers Dispersions Groundwater Groundwater pollution Hematite Iron oxides Remediation Stability Zeta potential Aggregation kinetics Hematite nanoparticles Nanoparticle aggregation Nanoparticle tracking analysis Physicochemical characteristics Physicochemical property Polymer nanoparticles Vinal gum Nanoparticles galactomannan hematite nanoparticle nanoparticle unclassified drug vinal gum ferric ion ferric oxide galactomannan mannan nanoparticle aggregation complexation hematite iron oxide particle size physicochemical property polymer polysaccharide reaction kinetics Article bioremediation chemical interaction complex formation concentration (parameters) dispersion molecular stability nonhuman particle size pH physical chemistry polymerization priority journal Prosopis Prosopis ruscifolia static electricity stereochemistry surface property zeta potential chemical model chemistry kinetics Prosopis ruscifolia Ferric Compounds Kinetics Mannans Models, Chemical Nanoparticles Particle Size Static Electricity The physicochemical characteristics of hematite nanoparticles related to their size, surface area and reactivity make them useful for many applications, as well as suitable models to study aggregation kinetics. For several applications (such as remediation of contaminated groundwater) it is crucial to maintain the stability of hematite nanoparticle suspensions in order to assure their arrival to the target place. The use of biopolymers has been proposed as a suitable environmentally friendly option to avoid nanoparticle aggregation and assure their stability. The aim of the present work was to investigate the formation of complexes between hematite nanoparticles and a non-conventional galactomannan (vinal gum - VG) obtained from Prosopis ruscifolia in order to promote hematite nanoparticle coating with a green biopolymer. Zeta potential and size of hematite nanoparticles, VG dispersions and the stability of their mixtures were investigated, as well as the influence of the biopolymer concentration and preparation method. DLS and nanoparticle tracking analysis techniques were used for determining the size and the zeta-potential of the suspensions. VG showed a polydispersed size distribution (300-475. nm Z-average diameter, 0.65. Pdi) and a negative zeta potential (between - 1 and - 12. mV for pH. 2 and 12, respectively). The aggregation of hematite nanoparticles (3.3. mg/L) was induced by the addition of VG at lower concentrations than 2. mg/L (pH. 5.5). On the other hand, hematite nanoparticles were stabilized at concentrations of VG higher than 2. mg/L. Several phenomena between hematite nanoparticles and VG were involved: steric effects, electrostatic interactions, charge neutralization, charge inversion and polymer bridging. The process of complexation between hematite nanoparticles and the biopolymer was strongly influenced by the preparation protocols. It was concluded that the aggregation, dispersion, and stability of hematite nanoparticles depended on biopolymer concentration and also on the way of preparation and initial physicochemical properties of the aqueous system. © 2015 Elsevier B.V. Fil:Santagapita, P.R. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales; Argentina. Fil:Buera, M.P. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales; Argentina. JOUR info:eu-repo/semantics/openAccess http://creativecommons.org/licenses/by/2.5/ar http://hdl.handle.net/20.500.12110/paper_00489697_v532_n_p556_Busch
institution	Universidad de Buenos Aires
institution_str	I-28
repository_str	R-134
collection	Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA)
topic	Aggregation kinetics Hematite nanoparticles Iron oxides Polymer-nanoparticle interaction Vinal gum Agglomeration Biomolecules Biopolymers Copolymers Dispersions Groundwater Groundwater pollution Hematite Iron oxides Remediation Stability Zeta potential Aggregation kinetics Hematite nanoparticles Nanoparticle aggregation Nanoparticle tracking analysis Physicochemical characteristics Physicochemical property Polymer nanoparticles Vinal gum Nanoparticles galactomannan hematite nanoparticle nanoparticle unclassified drug vinal gum ferric ion ferric oxide galactomannan mannan nanoparticle aggregation complexation hematite iron oxide particle size physicochemical property polymer polysaccharide reaction kinetics Article bioremediation chemical interaction complex formation concentration (parameters) dispersion molecular stability nonhuman particle size pH physical chemistry polymerization priority journal Prosopis Prosopis ruscifolia static electricity stereochemistry surface property zeta potential chemical model chemistry kinetics Prosopis ruscifolia Ferric Compounds Kinetics Mannans Models, Chemical Nanoparticles Particle Size Static Electricity
spellingShingle	Aggregation kinetics Hematite nanoparticles Iron oxides Polymer-nanoparticle interaction Vinal gum Agglomeration Biomolecules Biopolymers Copolymers Dispersions Groundwater Groundwater pollution Hematite Iron oxides Remediation Stability Zeta potential Aggregation kinetics Hematite nanoparticles Nanoparticle aggregation Nanoparticle tracking analysis Physicochemical characteristics Physicochemical property Polymer nanoparticles Vinal gum Nanoparticles galactomannan hematite nanoparticle nanoparticle unclassified drug vinal gum ferric ion ferric oxide galactomannan mannan nanoparticle aggregation complexation hematite iron oxide particle size physicochemical property polymer polysaccharide reaction kinetics Article bioremediation chemical interaction complex formation concentration (parameters) dispersion molecular stability nonhuman particle size pH physical chemistry polymerization priority journal Prosopis Prosopis ruscifolia static electricity stereochemistry surface property zeta potential chemical model chemistry kinetics Prosopis ruscifolia Ferric Compounds Kinetics Mannans Models, Chemical Nanoparticles Particle Size Static Electricity Busch, V.M. Loosli, F. Santagapita, P.R. Buera, M.P. Stoll, S. Formation of complexes between hematite nanoparticles and a non-conventional galactomannan gum. Toward a better understanding on interaction processes
topic_facet	Aggregation kinetics Hematite nanoparticles Iron oxides Polymer-nanoparticle interaction Vinal gum Agglomeration Biomolecules Biopolymers Copolymers Dispersions Groundwater Groundwater pollution Hematite Iron oxides Remediation Stability Zeta potential Aggregation kinetics Hematite nanoparticles Nanoparticle aggregation Nanoparticle tracking analysis Physicochemical characteristics Physicochemical property Polymer nanoparticles Vinal gum Nanoparticles galactomannan hematite nanoparticle nanoparticle unclassified drug vinal gum ferric ion ferric oxide galactomannan mannan nanoparticle aggregation complexation hematite iron oxide particle size physicochemical property polymer polysaccharide reaction kinetics Article bioremediation chemical interaction complex formation concentration (parameters) dispersion molecular stability nonhuman particle size pH physical chemistry polymerization priority journal Prosopis Prosopis ruscifolia static electricity stereochemistry surface property zeta potential chemical model chemistry kinetics Prosopis ruscifolia Ferric Compounds Kinetics Mannans Models, Chemical Nanoparticles Particle Size Static Electricity
description	The physicochemical characteristics of hematite nanoparticles related to their size, surface area and reactivity make them useful for many applications, as well as suitable models to study aggregation kinetics. For several applications (such as remediation of contaminated groundwater) it is crucial to maintain the stability of hematite nanoparticle suspensions in order to assure their arrival to the target place. The use of biopolymers has been proposed as a suitable environmentally friendly option to avoid nanoparticle aggregation and assure their stability. The aim of the present work was to investigate the formation of complexes between hematite nanoparticles and a non-conventional galactomannan (vinal gum - VG) obtained from Prosopis ruscifolia in order to promote hematite nanoparticle coating with a green biopolymer. Zeta potential and size of hematite nanoparticles, VG dispersions and the stability of their mixtures were investigated, as well as the influence of the biopolymer concentration and preparation method. DLS and nanoparticle tracking analysis techniques were used for determining the size and the zeta-potential of the suspensions. VG showed a polydispersed size distribution (300-475. nm Z-average diameter, 0.65. Pdi) and a negative zeta potential (between - 1 and - 12. mV for pH. 2 and 12, respectively). The aggregation of hematite nanoparticles (3.3. mg/L) was induced by the addition of VG at lower concentrations than 2. mg/L (pH. 5.5). On the other hand, hematite nanoparticles were stabilized at concentrations of VG higher than 2. mg/L. Several phenomena between hematite nanoparticles and VG were involved: steric effects, electrostatic interactions, charge neutralization, charge inversion and polymer bridging. The process of complexation between hematite nanoparticles and the biopolymer was strongly influenced by the preparation protocols. It was concluded that the aggregation, dispersion, and stability of hematite nanoparticles depended on biopolymer concentration and also on the way of preparation and initial physicochemical properties of the aqueous system. © 2015 Elsevier B.V.
format	JOUR
author	Busch, V.M. Loosli, F. Santagapita, P.R. Buera, M.P. Stoll, S.
author_facet	Busch, V.M. Loosli, F. Santagapita, P.R. Buera, M.P. Stoll, S.
author_sort	Busch, V.M.
title	Formation of complexes between hematite nanoparticles and a non-conventional galactomannan gum. Toward a better understanding on interaction processes
title_short	Formation of complexes between hematite nanoparticles and a non-conventional galactomannan gum. Toward a better understanding on interaction processes
title_full	Formation of complexes between hematite nanoparticles and a non-conventional galactomannan gum. Toward a better understanding on interaction processes
title_fullStr	Formation of complexes between hematite nanoparticles and a non-conventional galactomannan gum. Toward a better understanding on interaction processes
title_full_unstemmed	Formation of complexes between hematite nanoparticles and a non-conventional galactomannan gum. Toward a better understanding on interaction processes
title_sort	formation of complexes between hematite nanoparticles and a non-conventional galactomannan gum. toward a better understanding on interaction processes
url	http://hdl.handle.net/20.500.12110/paper_00489697_v532_n_p556_Busch
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Formation of complexes between hematite nanoparticles and a non-conventional galactomannan gum. Toward a better understanding on interaction processes

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