Copper, zinc, cadmium and lead biosorption by Gymnogongrus torulosus. Thermodynamics and kinetics studies

Gymnogongrus torulosus adsorption efficiency for cadmium(II), copper(II), lead(II) and zinc(II) were studied in batch mode in different acidic conditions. The adsorbent removal efficiency was determined as a function of contact time, initial metal ions concentration, pH and temperature. G. torulosus...

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Autor principal:	Areco, María del Mar
Publicado:	2010
Materias:	Biosorption Gymnogongrus torulosus Kinetics Metal removal Acidic conditions Adsorption efficiency Adsorption process Affinity constants Batch modes Biosorption capacity Biosorption process Contact time Copper (ii) Dubinin-Radushkevich Freundlich Intra-particle diffusion Kinetic experiment Langmuir models Langmuirs Lead biosorption Metal uptake Pseudo second order kinetics Pseudo-second-order kinetic models Rate-limiting steps Removal efficiencies SEM Solution parameters Surface area Temkin model Thermodynamics and kinetics Water adsorption Adsorption Cadmium Chemisorption Lead Metal ions Metals Removal Thermodynamics Zinc Zinc compounds copper lead metal ion zinc acidity article biomass biosorption calculation controlled study enthalpy entropy isotherm kinetics metal recovery nonhuman pH priority journal red alga scanning electron microscopy surface property temperature thermodynamics waste component removal waste water management Copper Particle Size Rhodophyta Seaweed Surface Properties
Acceso en línea:	https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_09277765_v81_n2_p620_Areco http://hdl.handle.net/20.500.12110/paper_09277765_v81_n2_p620_Areco
Aporte de:	Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA) de Universidad de Buenos Aires

id	paper:paper_09277765_v81_n2_p620_Areco
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spelling	paper:paper_09277765_v81_n2_p620_Areco2025-07-30T18:28:19Z Copper, zinc, cadmium and lead biosorption by Gymnogongrus torulosus. Thermodynamics and kinetics studies Areco, María del Mar Biosorption Gymnogongrus torulosus Kinetics Metal removal Acidic conditions Adsorption efficiency Adsorption process Affinity constants Batch modes Biosorption capacity Biosorption process Contact time Copper (ii) Dubinin-Radushkevich Freundlich Gymnogongrus torulosus Intra-particle diffusion Kinetic experiment Langmuir models Langmuirs Lead biosorption Metal removal Metal uptake Pseudo second order kinetics Pseudo-second-order kinetic models Rate-limiting steps Removal efficiencies SEM Solution parameters Surface area Temkin model Thermodynamics and kinetics Water adsorption Adsorption Cadmium Chemisorption Lead Metal ions Metals Removal Thermodynamics Zinc Zinc compounds Biosorption copper lead metal ion zinc acidity article biomass biosorption calculation controlled study enthalpy entropy Gymnogongrus torulosus isotherm kinetics metal recovery nonhuman pH priority journal red alga scanning electron microscopy surface property temperature thermodynamics waste component removal waste water management Adsorption Cadmium Copper Kinetics Lead Particle Size Rhodophyta Seaweed Surface Properties Thermodynamics Zinc Gymnogongrus torulosus Gymnogongrus torulosus adsorption efficiency for cadmium(II), copper(II), lead(II) and zinc(II) were studied in batch mode in different acidic conditions. The adsorbent removal efficiency was determined as a function of contact time, initial metal ions concentration, pH and temperature. G. torulosus was characterized by SEM, water adsorption surface area and EDS. The Langmuir, Freundlich, Dubinin-Radushkevich and Temkin models have been applied and results showed that the biosorption process was better described by the Langmuir model. Kinetic experiments demonstrated that fast metal uptakes follow a pseudo-second-order kinetic model and that intra-particle diffusion and/or chemisorption were the rate-limiting steps. Experimental results show that G. torulosus isotherm followed the biosorption series, Cu > Cd ∼ Zn ∼ Pb. Biosorption capacities were affected by solution parameters. The maximum metal uptake (qmax) increased with increasing pH. The affinity constant, qmax, and the pseudo-second-order kinetic constants were calculated for the adsorption of all studied metals onto G. torulosus. The Gibbs free energy of the adsorption process as well as the process enthalpy and entropy were calculated from experimental results. © 2010 Elsevier B.V. Fil:Areco, M.M. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales; Argentina. 2010 https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_09277765_v81_n2_p620_Areco http://hdl.handle.net/20.500.12110/paper_09277765_v81_n2_p620_Areco
institution	Universidad de Buenos Aires
institution_str	I-28
repository_str	R-134
collection	Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA)
topic	Biosorption Gymnogongrus torulosus Kinetics Metal removal Acidic conditions Adsorption efficiency Adsorption process Affinity constants Batch modes Biosorption capacity Biosorption process Contact time Copper (ii) Dubinin-Radushkevich Freundlich Gymnogongrus torulosus Intra-particle diffusion Kinetic experiment Langmuir models Langmuirs Lead biosorption Metal removal Metal uptake Pseudo second order kinetics Pseudo-second-order kinetic models Rate-limiting steps Removal efficiencies SEM Solution parameters Surface area Temkin model Thermodynamics and kinetics Water adsorption Adsorption Cadmium Chemisorption Lead Metal ions Metals Removal Thermodynamics Zinc Zinc compounds Biosorption copper lead metal ion zinc acidity article biomass biosorption calculation controlled study enthalpy entropy Gymnogongrus torulosus isotherm kinetics metal recovery nonhuman pH priority journal red alga scanning electron microscopy surface property temperature thermodynamics waste component removal waste water management Adsorption Cadmium Copper Kinetics Lead Particle Size Rhodophyta Seaweed Surface Properties Thermodynamics Zinc Gymnogongrus torulosus
spellingShingle	Biosorption Gymnogongrus torulosus Kinetics Metal removal Acidic conditions Adsorption efficiency Adsorption process Affinity constants Batch modes Biosorption capacity Biosorption process Contact time Copper (ii) Dubinin-Radushkevich Freundlich Gymnogongrus torulosus Intra-particle diffusion Kinetic experiment Langmuir models Langmuirs Lead biosorption Metal removal Metal uptake Pseudo second order kinetics Pseudo-second-order kinetic models Rate-limiting steps Removal efficiencies SEM Solution parameters Surface area Temkin model Thermodynamics and kinetics Water adsorption Adsorption Cadmium Chemisorption Lead Metal ions Metals Removal Thermodynamics Zinc Zinc compounds Biosorption copper lead metal ion zinc acidity article biomass biosorption calculation controlled study enthalpy entropy Gymnogongrus torulosus isotherm kinetics metal recovery nonhuman pH priority journal red alga scanning electron microscopy surface property temperature thermodynamics waste component removal waste water management Adsorption Cadmium Copper Kinetics Lead Particle Size Rhodophyta Seaweed Surface Properties Thermodynamics Zinc Gymnogongrus torulosus Areco, María del Mar Copper, zinc, cadmium and lead biosorption by Gymnogongrus torulosus. Thermodynamics and kinetics studies
topic_facet	Biosorption Gymnogongrus torulosus Kinetics Metal removal Acidic conditions Adsorption efficiency Adsorption process Affinity constants Batch modes Biosorption capacity Biosorption process Contact time Copper (ii) Dubinin-Radushkevich Freundlich Gymnogongrus torulosus Intra-particle diffusion Kinetic experiment Langmuir models Langmuirs Lead biosorption Metal removal Metal uptake Pseudo second order kinetics Pseudo-second-order kinetic models Rate-limiting steps Removal efficiencies SEM Solution parameters Surface area Temkin model Thermodynamics and kinetics Water adsorption Adsorption Cadmium Chemisorption Lead Metal ions Metals Removal Thermodynamics Zinc Zinc compounds Biosorption copper lead metal ion zinc acidity article biomass biosorption calculation controlled study enthalpy entropy Gymnogongrus torulosus isotherm kinetics metal recovery nonhuman pH priority journal red alga scanning electron microscopy surface property temperature thermodynamics waste component removal waste water management Adsorption Cadmium Copper Kinetics Lead Particle Size Rhodophyta Seaweed Surface Properties Thermodynamics Zinc Gymnogongrus torulosus
description	Gymnogongrus torulosus adsorption efficiency for cadmium(II), copper(II), lead(II) and zinc(II) were studied in batch mode in different acidic conditions. The adsorbent removal efficiency was determined as a function of contact time, initial metal ions concentration, pH and temperature. G. torulosus was characterized by SEM, water adsorption surface area and EDS. The Langmuir, Freundlich, Dubinin-Radushkevich and Temkin models have been applied and results showed that the biosorption process was better described by the Langmuir model. Kinetic experiments demonstrated that fast metal uptakes follow a pseudo-second-order kinetic model and that intra-particle diffusion and/or chemisorption were the rate-limiting steps. Experimental results show that G. torulosus isotherm followed the biosorption series, Cu > Cd ∼ Zn ∼ Pb. Biosorption capacities were affected by solution parameters. The maximum metal uptake (qmax) increased with increasing pH. The affinity constant, qmax, and the pseudo-second-order kinetic constants were calculated for the adsorption of all studied metals onto G. torulosus. The Gibbs free energy of the adsorption process as well as the process enthalpy and entropy were calculated from experimental results. © 2010 Elsevier B.V.
author	Areco, María del Mar
author_facet	Areco, María del Mar
author_sort	Areco, María del Mar
title	Copper, zinc, cadmium and lead biosorption by Gymnogongrus torulosus. Thermodynamics and kinetics studies
title_short	Copper, zinc, cadmium and lead biosorption by Gymnogongrus torulosus. Thermodynamics and kinetics studies
title_full	Copper, zinc, cadmium and lead biosorption by Gymnogongrus torulosus. Thermodynamics and kinetics studies
title_fullStr	Copper, zinc, cadmium and lead biosorption by Gymnogongrus torulosus. Thermodynamics and kinetics studies
title_full_unstemmed	Copper, zinc, cadmium and lead biosorption by Gymnogongrus torulosus. Thermodynamics and kinetics studies
title_sort	copper, zinc, cadmium and lead biosorption by gymnogongrus torulosus. thermodynamics and kinetics studies
publishDate	2010
url	https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_09277765_v81_n2_p620_Areco http://hdl.handle.net/20.500.12110/paper_09277765_v81_n2_p620_Areco
work_keys_str_mv	AT arecomariadelmar copperzinccadmiumandleadbiosorptionbygymnogongrustorulosusthermodynamicsandkineticsstudies
_version_	1840322842412974080

Copper, zinc, cadmium and lead biosorption by Gymnogongrus torulosus. Thermodynamics and kinetics studies

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