Adsorption of Iron and Manganese Ions Using Low-Cost Materials as Adsorbents

Abstract

ABSTRACT:The removal of toxic metal ions (iron and manganese) from aqueous solution by adsorption was studied. The batch process was used either to remove each metal ion singly or both metals as a multi-component system. The adsorbents used were low-cost materials, viz. palm fruit bunch and maize cob. The adsorption isotherms demonstrated that the adsorbents behaved in a favourable manner towards metal ion adsorption. The adsorption capacities for iron ions on palm fruit bunch and maize cob were in the 57-80% range and for the manganese ion in the 50-79% range for initial concentrations between 1 ppm and 10 ppm. With mixtures of both metal ions, removal of iron ions from the mixture was in the 54-79% range and for the manganese ion in the 54-76% range. The extended Langmuir model gave poor agreement with the data for the adsorption of mixtures of the two metal ions while the P-factor model yielded good agreement.

Adsorption of ferric ions onto natural feldspar: kinetic modeling and adsorption isotherm

“…Our results are in a good qualitatively agreements with those found from adsorption of Fe 3? on the palm fruit bunch and maize cob (Nassar et al 2004).…”

Thermodynamics Approach in the Adsorption of Heavy Metals

“…The binding of Iron(III) ion with the surface of the natural adsorbent could change their forms of existence in the environment. In general they may react with particular species, change oxidation states and precipitate [53]. In spite of the abundant reported researches in the adsorption for the removal of the dissolved heavy metals from the aqueous streams, however the iron(III) ions still has limited reported studies.…”

Estudo da adsorção de surfactante catiônico em uma matriz inorgânica preparada via óxido de nióbio

“…A faixa de concentração do CTAB estava abaixo da concentração micelar crítica (CMC), para evitar a formação de micelas [20,21]. Para o estudo do efeito do pH no processo de adsorção do surfatante na matriz inorgânica fez-se o ajuste do pH da solução de CTAB em pH 9,6 com solução de NaOH (0,1 mol.L -1 ) e em pH 3,0 com adição de uma solução de H 3 PO 4 (0,3 mol.L -1 ).…”

“…Dentre os modelos de adsorção com ligações químicas estudadas, os que mais se aplicam aos fenômenos de adsorção líquidos-sólidos são os modelos de Langmuir e de Freundlich [17]. Esses modelos são os mais freqüentemente usados para descrever isotermas para aplicações em tratamento de águas e de efluentes [18][19][20][21].…”