About: As(V) removal from aqueous media using alfa-MnO2 nanorods-impregnated Laterite composite adsorbents

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rdf:type	skos:Concept http://linked.opendata.cz/ontology/domain/vavai/Vysledek
Description	We present a novel way of enhancing the utility of low cost readily available Laterite by impregnating it with the alfa-MnO2nanorods, thus making a composite material suitable for the removal of As(V) from aqueous media. The composites were synthesized by two methods: (i) ball-milling of a physical blend of laterite with pre-synthesised MnO2; and (i) in-situ formation of MnO2 in the presence of laterite. The BET surface area of composites prepared by both methods was markedly higher compared to un-modified laterite, and the presence of MnO2 in the composite was also confirmed by XRD analysis and TEM microscopy. The adsorption capacity for As(V) was found to be highly pH dependent and the adsorption kinetics followed a pseudo second-order kinetic model. The Langmuir adsorption isotherm was found to be the best model to describe the adsorption equilibrium of As(V) onto un-modified laterite as well both ball-milled in-situ formed composite. The adsorption capacities at room temperature and pH 7.0 were found to be 1.50 mg g?1, 8.93 mg g?1 and 9.70 mg g?1, for un-modified laterite, ball-milled and in-situ formed composite, respectively. We present a novel way of enhancing the utility of low cost readily available Laterite by impregnating it with the alfa-MnO2nanorods, thus making a composite material suitable for the removal of As(V) from aqueous media. The composites were synthesized by two methods: (i) ball-milling of a physical blend of laterite with pre-synthesised MnO2; and (i) in-situ formation of MnO2 in the presence of laterite. The BET surface area of composites prepared by both methods was markedly higher compared to un-modified laterite, and the presence of MnO2 in the composite was also confirmed by XRD analysis and TEM microscopy. The adsorption capacity for As(V) was found to be highly pH dependent and the adsorption kinetics followed a pseudo second-order kinetic model. The Langmuir adsorption isotherm was found to be the best model to describe the adsorption equilibrium of As(V) onto un-modified laterite as well both ball-milled in-situ formed composite. The adsorption capacities at room temperature and pH 7.0 were found to be 1.50 mg g?1, 8.93 mg g?1 and 9.70 mg g?1, for un-modified laterite, ball-milled and in-situ formed composite, respectively. (en)
Title	As(V) removal from aqueous media using alfa-MnO2 nanorods-impregnated Laterite composite adsorbents As(V) removal from aqueous media using alfa-MnO2 nanorods-impregnated Laterite composite adsorbents (en)
skos:prefLabel	As(V) removal from aqueous media using alfa-MnO2 nanorods-impregnated Laterite composite adsorbents As(V) removal from aqueous media using alfa-MnO2 nanorods-impregnated Laterite composite adsorbents (en)
skos:notation	RIV/60461373:22320/12:43891647!RIV13-MSM-22320___
http://linked.open...avai/predkladatel	Fakulta technologie ochrany prostředí
http://linked.open...avai/riv/aktivita	Z
http://linked.open...avai/riv/aktivity	Z(MSM6046137308)
http://linked.open...iv/cisloPeriodika	1
http://linked.open...vai/riv/dodaniDat	2013
http://linked.open...aciTvurceVysledku	Strnadová, Nina Nguyen, Thanh Dong
http://linked.open.../riv/druhVysledku	J - Článek v odborném periodiku
http://linked.open...iv/duvernostUdaju	S - Úplné a pravdivé údaje nepodléhající ochraně podle zvláštních právních předpisů
http://linked.open...titaPredkladatele	Vysoká škola chemicko-technologická v Praze / Fakulta technologie ochrany prostředí
http://linked.open...dnocenehoVysledku	123944
http://linked.open...ai/riv/idVysledku	RIV/60461373:22320/12:43891647
http://linked.open...riv/jazykVysledku	eng - angličtina
http://linked.open.../riv/klicovaSlova	Microstructure; X-ray diffraction; Chemical Synthesis; Nanostructures; Composites (en)
http://linked.open.../riv/klicoveSlovo	Composites X-ray diffraction Chemical Synthesis Nanostructures Microstructure
http://linked.open...odStatuVydavatele	NL - Nizozemsko
http://linked.open...ontrolniKodProRIV	[E52161A0B17B]
http://linked.open...i/riv/nazevZdroje	Materials Research Bulletin
http://linked.open...in/vavai/riv/obor	DJ
http://linked.open...ichTvurcuVysledku	2 (xsd:int)
http://linked.open...cetTvurcuVysledku	5 (xsd:int)
http://linked.open...UplatneniVysledku	2012
http://linked.open...v/svazekPeriodika	47
http://linked.open...iv/tvurceVysledku	Strnadová, Nina Štěpánek, František Singh, Mandeep Ulbrich, Pavel Nguyen, Thanh Dong
http://linked.open...n/vavai/riv/zamer	The study of chemical biological processes for the environmental protection
issn	0250-4707
number of pages	9 (xsd:int)
http://bibframe.org/vocab/doi	10.1016/j.materresbull.2011.10.004
http://localhost/t...ganizacniJednotka	22320
is http://linked.open...avai/riv/vysledek of	As(V) removal from aqueous media using alfa-MnO2 nanorods-impregnated Laterite composite adsorbents

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