Adsorption of methylene blue from aqueous solution by chemically treated water hyacinth

El-Khaiary, Mohammad I.; Gad, Falah A.; Mahmoud, Mahmoud S.; Samy†, Hossam El-Din

doi:10.1080/02772240802541379

Cited by 17 publications

(9 citation statements)

References 32 publications

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“…3, it was observed that the uptake capacity was found to be increased with increase in contact time. The adsorption was a very fast process for the first 120 min, and then the rate decreased [11]. The uptake capacity of chromium increases as the concentration of Cr(VI) increases [6,12].…”

Section: Effect Of Initial Cr(vi) Concentrationmentioning

confidence: 97%

Removal of Chromium from Synthetic Effluent using Nymphaea rubra

Taj

Renganathan

Partha

et al. 2009

CLEAN Soil Air Water

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In the present work, biosorption of Cr(VI) by Nymphaea rubra was investigated in batch studies. Batch experiments were conducted to study the effect of initial sorbent dosage, solution pH and initial Cr(VI) concentration. The results showed that the equilibrium uptake capacity was increased with decrease in biomass dosage. The Cr(VI) removal was influenced by the initial chromium compound concentration. Langmuir and Freundlich adsorption isotherm models were used to represent the equilibrium data. The Freundlich isotherm model was fitted very well with the equilibrium data when compared to Langmuir isotherm model. The sorption results were analyzed for pseudo-first order and pseudo-second order kinetic model. It was observed that the kinetic data fitted very well with the pseudo-second order rate equation when compared to the pseudo-first order rate equation. Fourier transform infrared spectrum showed the presence of different functional groups in the biomass. The surface morphology of the sorbent was exemplified by SEM analysis. Aquatic weeds seem to be a promising biosorbent for the removal of chromium ions from water environment. This paper reports the research findings of a laboratory-based study on the removal of Cr(VI) from the synthetic solution using the dried stem of N. rubra as a biosorbent.

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Section: Effect Of Initial Cr(vi) Concentrationmentioning

confidence: 97%

Removal of Chromium from Synthetic Effluent using Nymphaea rubra

Taj

Renganathan

Partha

et al. 2009

CLEAN Soil Air Water

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“…Enceng gondok yang digunakan diperoleh dari Telaga Ngipik, Kabupaten Gresik, Jawa Timur, dimana telaga tersebut merupakan telaga hasil reklamasi lahan tambang bahan baku semen dan eceng gondok yang bersifat sebagai biosorben alami, sehingga sebelum digunakan sebagai adsoben diperlukan regenerasi adsorben eceng gondok. Perlakuan dengan menggunakan larutan asam seperti larutan HNO 3 (El-Khaiary, 2007), H 3 PO 4 (ElNabarawy dan Khedr, 2000) dan HCl (Shofiyani dan Gusrizal, 2006;Priya dan Selvan, 2014) umumnya digunakan untuk regenerasi adsorben eceng gondok. Pada penelitian ini, HCL digunakan untuk regenerasi adsorben eceng gondok karena HCl adalah yang paling banyak digunakan.…”

Section: Pendahuluanunclassified

Adsorption of Calcium Ions Using Water Hyacinth Biomass (Eichhornia Crassipes) Regenerated with HCl

Rakhmania

Khaeronnisa

Ismuyanto

et al. 2017

RBAET

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“…Devido aos problemas decorrentes ambientais, muitos estudos associados a novas tecnologias têm sido propostos para o tratamento de efluentes têxteis, como por exemplo, a ozonização [11], fluxo subcrítico [12], degradação biológica [13], adsorção [14] e biossorção [15].…”

Section: Introductionunclassified

Aplicação da biomassa Saccharomyces cerevisiae como agente adsorvente do corante Direct Orange 2GL e os possíveis mecanismos de interações adsorbato/adsorvente

2015

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RESUMOOs efluentes têxteis liberam grandes quantidades de resíduos de corantes no meio ambiente, poluindo e alterando todo o ecossistema aquático. Além da poluição visual os compostos possuem alta toxicidade, quando não tratado corretamente podem gerar bioacumulação na biota. A levedura Saccharomyces cerevisiae, comumente utilizada como biocatalizador nas indústrias, é um possível adsorvente, devido à estrutura química composta pela parede celular, contendo grupos amino sítio ativo de possíveis interações com os grupamentos sulfônicos pertencentes aos corantes reativos, cuja comercialização compreende em escala mundial. Para tanto, foi realizado um estudo de remoção do corante reativo Direct Orange 2GL pelo método de adsorção, utilizando analises em espectrofotômetro de UV-Vis, mediante a diferentes concentrações de biomassa de S. cerevisiae e valores de pH em solução. O experimento foi analisado a partir do gráfico de isotermas de adsorção, visando à capacidade máxima de adsorção do corante na parede celular da levedura a partir do tratamento matemático usando como modelo as equações de Langmuir e Freundlich e suas linearizações. Os experimentos ressaltaram os possíveis mecanismos de interações químicas, entre adsorbato/adsorvente, podendo apresentar formação em monocamadas ou multicamadas a partir do coeficiente de correlação relativo mediante a influência do valor de pH. As analises em espectrofotômetro UV-Vis, exibiram eficiência no decrés-cimo dos valores de absorvância em relação ao valor no pico de onda máximo, com resultados de 0,063 absorvância, sendo este um valor aceitável para o padrão de absorvância permitido no descarte de corante. Desse modo, a utilização de biomassa de S. cerevisiae propicia resultados relevantes mesmo a baixas concentrações desde que ajustado os valores de pH em solução.Palavras-chave: adsorção, corante têxtil, levedura. ABSTRACTThe textile effluents release large amounts of dye waste in the environment, polluting and altering the whole aquatic ecosystem. Besides the visual pollution compounds have high toxicity, if not treated properly can generate bioaccumulation in biota. The yeast Saccharomyces cerevisiae, commonly used as a biocatalyst in industries is a possible adsorbent due to the chemical structure composed of the cell wall containing amino groups, active site location of possible interactions with sulfonic groups belonging to reactive dyes, which marketing worldwide. This way, it was performed to removal study of reactive dye Direct Orange 2GL by adsorption method using a spectrophotometer analysis of UV-Vis to the different biomass concentrations of S.

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Adsorption of methylene blue from aqueous solution by chemically treated water hyacinth

Cited by 17 publications

References 32 publications

Removal of Chromium from Synthetic Effluent using Nymphaea rubra

Removal of Chromium from Synthetic Effluent using Nymphaea rubra

Adsorption of Calcium Ions Using Water Hyacinth Biomass (Eichhornia Crassipes) Regenerated with HCl

Aplicação da biomassa Saccharomyces cerevisiae como agente adsorvente do corante Direct Orange 2GL e os possíveis mecanismos de interações adsorbato/adsorvente

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