Removal of nickel (II) from aqueous solutions using marine macroalgae as the sorbing biomass

Kalyani, Swayampakula; Rao, P. Srinivasa; Krishnaiah, A.

doi:10.1016/j.chemosphere.2004.08.057

Cited by 94 publications

(33 citation statements)

References 14 publications

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“…In the beginning, the adsorption models such as Langmuir, Freundlich, Sips, Toth, Dubinin-Raduskevich, Redlich-Peterson, Temkin, and Hill are extensively used to describe adsorption in gas phase, but in later, most of them can in principle be extended to liquid phase adsorption. Several studies have reported on the applications of different adsorption models to evaluate various liquid phase adsorption systems [29][30][31][32][33].…”

Section: Adsorption Isothermsmentioning

confidence: 99%

Removal of basic dyes in binary system by adsorption using rarasaponin–bentonite: Revisited of extended Langmuir model

Kurniawan

Sutiono

Indraswati

et al. 2012

Chemical Engineering Journal

109

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Section: Adsorption Isothermsmentioning

confidence: 99%

Removal of basic dyes in binary system by adsorption using rarasaponin–bentonite: Revisited of extended Langmuir model

Kurniawan

Sutiono

Indraswati

et al. 2012

Chemical Engineering Journal

109

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“…With the increase of pH from 2 to 5, the removal rate and the adsorption capacity of Ni 2+ increased quickly from 19% to 91% and from 1.52 mg/g to 7.28 mg/g, respectively. At low pH, the presence of higher concentrations of H + competed with Ni 2+ in the system and caused partial releasing of the Ni 2+ [31]. On the other hand, the solubility and ionization of nickel salt were strongly enhanced in low pH solution [32].…”

Section: Effect Of Ph On Adsorptionmentioning

confidence: 96%

Zeolite Synthesized from Coal Fly Ash Produced by a Gasification Process for Ni2+ Removal from Water

et al. 2018

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There are increasing demands and great potential of coal gasification in China, but there is a lack of studies focused on the disposal and utilization of coal fly ash produced by the gasification process. In this study, a coal fly ash sample derived from a gasifier in Jincheng, China, was utilized as raw material for the synthesis of zeolite by alkali fusion followed by hydrothermal treatments. The effects of operation conditions on the cation exchange capacity (CEC) of synthesized zeolite were investigated. The synthesized zeolite with the highest CEC (270.4 meq/100 g), with abundant zeolite X and small amount of zeolite A, was produced by 1.5 h alkali fusion under 550 • C with NaOH/coal fly ash ratio 1.2 g/g followed by 15 h hydrothermal treatment under 90 • C with liquid/solid ratio 5 mL/g and applied in Ni 2+ removal from water. The removal rate and the adsorption capacity of Ni 2+ from water by the synthesized zeolite were determined at the different pH, contact time, adsorbent dose and initial Ni 2+ concentration. The experimental data of adsorption were interpreted in terms of Freundlich and Langmuir equations. The adsorption of Ni 2+ by the synthesized zeolite was found to fit sufficient using the Langmuir isotherm. More than 90% of Ni 2+ in water could be removed by synthesized zeolite under the proper conditions. We show that the coal fly ash produced by the gasification process has great potential to be used as an alternative and cheap source in the production of adsorbents.

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“…Sin embargo, todos estos usos hacen que este metal esté ampliamente disponible en el ambiente, especialmente en cuerpos de agua, y que por su alta toxicidad para el ser humano y diversos microorganismos, su remoción sea de especial cuidado [2]. Así, dada la necesidad de reparar los daños causados a nuestro medio ambiente y especialmente a nuestros cuerpos de agua, por la importancia que estos tienen para la vida, se han desarrollado varios métodos para la remoción de contaminantes en solución acuosa, entre las que se encuentran la precipitación química, osmosis inversa, intercambio iónico, entre otras, sin embargo debido a los altos costos y subsecuentes problemas de contaminación que muchas de estas generan, otras alternativas han surgido para esta tarea, resultados de diversas investigaciones han encontrado que la biomasa residual lignocelulósica es una excelente opción para el tratamiento de aguas mediante un proceso de bioadsorción debido a sus constituyentes como lo son: la celulosa y la lignina, además de numerosos grupos funcionales [3], que facilitan y favorecen en diversos grados la tarea de adsorción de los iones metálicos, así el uso de esta técnica se presenta como un proceso pasivo de mecanismo fisicoquímico que se realiza con biomasa no viviente y que se caracteriza por la interacción de los iones metálicos con ligandos presentes en las paredes celulares de la biomasa [4] hasta alcanzar el equilibrio entre adsorbato y adsorbente [5], con la ventaja de usar generalmente materiales de desecho de las agroindustrias que permiten obtener materiales adsorbentes a bajo costo y que además permiten aliviar el problema de la acumulación de estos desechos [6].…”

Section: Introductionunclassified

Evaluación de la biosorción con bagazo de palma africana para la eliminación de Pb (II) en solución

et al. 2015

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RESUMENSe propone la adsorción de Pb (II) usando bagazo de palma tratado químicamente con ácido cítrico, se elige este material por ser un desecho agroindustrial ampliamente disponible en la región Caribe colombiana. Los experimentos fueron llevados a cabo en sistema batch en solución acuosa de plomo a una concentración de 100 ppm. La determinación de la concentración de metal al final del proceso se midió por absorción atómica. La caracterización de los materiales adsorbentes usados se hizo por FTIR encontrando que los grupos hidroxilos y carboxílicos son los principales responsables de la capacidad de adsorción. Además, fue encontrado que el pH es el factor de mayor incidencia en el proceso, siendo el de 6 el valor óptimo. Por otra parte, se encontró que el Pb (II) presenta una sorción rápida durante los primeros 10 minutos, además el modelo de Elovich fue el de mejor ajuste. La capacidad máxima de adsorción según la isoterma de Langmuir fue de 162 y 451 mg/g para el bagazo sin modificar y modificado respectivamente, estableciendo que la modificación fue altamente eficiente.Palabras Clave: Adsorbente, Plomo, Residuo, Remoción, Tratamiento químico. ABSTRACTIt was studied the adsorption of Pb (II) using palm bagasse chemically treated with citric acid. This material is chosen due to is an available waste in the Colombian Caribbean region. The experiments were carried out in batch system in aqueous solution of lead at a concentration of 100 ppm. The determination of the heavy concentration at the end of the process was measured by atomic absorption. The characterization of adsorbent materials used was carry out using FTIR. It was found that the hydroxyl and carboxyl groups are mainly responsible of adsorption capacities. Furthermore, it was found that the pH is the most prevalent factor in the process. The optimum value was 6. Moreover, it was found that the Pb (II) exhibits rapid sorption during the first 10 minutes. The process was better fitted by the Elovich model. The maximum adsorption capacity according to Langmuir isotherm was 162 and 451 mg/g for unmodified and modified bagasse respectively. It was established that the chemical treatment was highly efficient.

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Removal of nickel (II) from aqueous solutions using marine macroalgae as the sorbing biomass

Cited by 94 publications

References 14 publications

Removal of basic dyes in binary system by adsorption using rarasaponin–bentonite: Revisited of extended Langmuir model

Removal of basic dyes in binary system by adsorption using rarasaponin–bentonite: Revisited of extended Langmuir model

Zeolite Synthesized from Coal Fly Ash Produced by a Gasification Process for Ni2+ Removal from Water

Evaluación de la biosorción con bagazo de palma africana para la eliminación de Pb (II) en solución

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