Mono and simultaneous removal of crystal violet and safranin dyes from aqueous solutions by HDTMA-modified Spirulina sp.

Güler, Ülker Aslı; Erşan, Mehtap; Tunçel, Eliza; Dügenci, Feride

doi:10.1016/j.psep.2015.11.006

Cited by 74 publications

(39 citation statements)

References 69 publications

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“…ese bands are associated with the symmetric and asymmetric stretching vibrations of the methylene (CH 2 ) and methyl group (CH 3 ) of the aliphatic chain of the surfactant. Furthermore, another new peak of weak intensity appeared at 1462 cm − 1 , which was attributed to methyl groups of the cationic substituent [7,20,21].…”

Section: Fourier-transform Infrared (Ft-ir) Spectroscopymentioning

confidence: 99%

“…Most dyes are organic compounds having complex aromatic structures with a variety of functional groups and are extensively used in various industries like textile, paper, plastic, food, printing, cosmetic, and pharmaceutical industries [1][2][3]. However, some dyes discharged from the effluents of the industries into receiving streams are sources of water pollution because most of the dyes and their degradation products are highly toxic, mutagenic, carcinogenic, and allergenic [4][5][6][7]. e dyes in water effluents have a very hazardous impact on the environment, making it unfit for human and aquatic life, thus causing chronic and acute diseases [3][4][5][6][7][8].…”

Section: Introductionmentioning

confidence: 99%

“…However, some dyes discharged from the effluents of the industries into receiving streams are sources of water pollution because most of the dyes and their degradation products are highly toxic, mutagenic, carcinogenic, and allergenic [4][5][6][7]. e dyes in water effluents have a very hazardous impact on the environment, making it unfit for human and aquatic life, thus causing chronic and acute diseases [3][4][5][6][7][8]. erefore, several treatment methods have been adopted for removal of dyes from wastewaters in view to prevent continuous environmental pollution.…”

Section: Introductionmentioning

confidence: 99%

“…However, the modification of these lignocellulosic materials also seems necessary to improve their performance. Some earlier works mentioned that the modification of biosorbents with cationic surfactants is an effective technology to enhance the adsorption capacity of anionic dyes [7,[19][20][21][22]. e aim of our work is to valorize the palm grove residues for the biosorption of some organic dyes.…”

Section: Introductionmentioning

confidence: 99%

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Indigo Carmine and 2,6-Dichlorophenolindophenol Removal Using Cetyltrimethylammonium Bromide-Modified Palm Oil Fiber: Adsorption Isotherms and Mass Transfer Kinetics

Ngaha

Njanja

Doungmo

et al. 2019

International Journal of Biomaterials

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In the present work, the usefulness of cetyltrimethylammonium bromide-modified palm oil fiber (CTAB-modified POF) for the removal of indigo carmine (IC) and 2,6-dichlorophenolindophenol (2,6-DCPIP) from aqueous solutions was investigated. Raw, NaOH-treated, and CTAB-modified POF were characterized by Fourier-transform infrared (FT-IR) spectroscopy, elemental analysis, thermogravimetric-hyperdifferential scanning calorimetric (TG-HDSC) analysis, X-ray diffraction (XRD), and scanning electron microscopy (SEM). e adsorption studies of IC and 2,6-DCPIP were performed in batch mode using CTAB-modified POF. e results showed that equilibrium was attained after a contact time of 30 minutes for IC and 20 minutes for 2,6-DCPIP. e maximum capacity of adsorption was obtained at pH � 2. e capacity of adsorption considerably increased with modified biosorbents and with increasing initial concentration of dyes. e ionic strength favors the increasing adsorption capacity of IC and does not affect the adsorption capacity of 2,6-DCPIP. e percentage of adsorption increased with increasing mass of the biosorbents. e nonlinear regression of adsorption isotherms showed that Freundlich (r 2 � 0.953; χ 2 � 4.398) and Temkin (r 2 � 0.986; χ 2 � 1.196) isotherms are most appropriate to describe the adsorption of IC and 2,6-DCPIP on CTAB-modified POF, respectively. e maximum adsorption capacities determined by the Langmuir isotherm were 275.426 and 230.423 μmol·g − 1 for IC and 2,6-DCPIP, respectively. e linear regression of adsorption kinetics was best described by the pseudo-second-order model (R 2 ≥ 0.998). e diffusion mechanism showed that external mass transfer is the main rate controlling step. Desorption of the two dyes is favorable in the alkaline medium.

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Section: Fourier-transform Infrared (Ft-ir) Spectroscopymentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Indigo Carmine and 2,6-Dichlorophenolindophenol Removal Using Cetyltrimethylammonium Bromide-Modified Palm Oil Fiber: Adsorption Isotherms and Mass Transfer Kinetics

Ngaha

Njanja

Doungmo

et al. 2019

International Journal of Biomaterials

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“…A capacidade de biossorção foi favorecida com a diminuição do pH, sendo os valores máximos obtidos a pH=2 o qual permaneceu na faixa de 45 mg/g logo, com o aumento do pH a remoção diminuiu significativamente, a razão para isto é que o biossorvente em meio básico acaba sofrendo um ataque no qual as moléculas presentes na casca, principalmente as fibrosas como a celulose, lignina e hemicelulose, se dissolvem quase que por completo, ocupando os sítios adsortivos presentes no biossorvente, logo a adsorção acaba sendo prejudicada. Maior capacidade de biossorção com o uso de corantes catiônicos em pH's inferiores também foi obtido por Ulker et al (2016), onde foi utilizado algas na biossorção do corante violeta cristal.…”

Section: Efeito Do Phunclassified

Uso De Resíduos Da Agroindústria Na Remoção Do Corante Violeta Cristal

Georgin¹,

Cabral²,

Hernandes³

et al. 2017

Blucher Chemical Engineering Proceedings

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RESUMO -Neste trabalho foi utilizada a casca de Nóz pecã na remoção do corante catiônico, violeta cristal. Foram estudadas as curvas cinéticas o efeito da massa e o efeito do pH a partir da avaliação de diferentes parâmetros, bem como o tempo de contato. A capacidade de adsorção foi favorecida em pH ácido, sendo que a máxima capacidade de adsorção foi de 147,3 mg/g. O modelo pseudoprimeira ordem foi o mais adequado para representar as curvas cinéticas de adsorção. INTRODUÇÃOUm dos grandes problemas do mundo moderno é a poluição de águas superficiais proveniente, na maioria das vezes, do descarte inadequado de resíduos industriais e agrícolas (SANTOS et al., 1997;CORBI et al., 2006).Os corantes são substâncias com elevado potencial de aplicação nas mais diversas áreas, utilizados para colorir os produtos finais de industriais têxteis, de pedras preciosas, couro, papéis, plásticos e alimentos. Estima-se que são mais de 100.000 corantes sintéticos no mercado, com uma produção anual de mais de 700.000 toneladas em todo o mundo (AL-FAWWAZ e ABDULLAH, 2016).Os métodos para tratamento de efluentes industriais mais utilizados envolvem processos físicos e/ou químicos, como oxidação, troca iônica, adsorção por carvão ativado, separação por membrana, processos biológicos, eletroquímicos, fotoquímicos, neutralização/precipitação química, etc. (POLPRASET et al., 2012;MOHAN et al, 2008). Os procedimentos baseados na adsorção têm a vantagem de serem versáteis e acessíveis, entretanto o material adsorvente pode encarecer o processo.O emprego de biossorventes torna-se ainda mais relevante quando são derivados de resíduos agroindustriais, os quais dependendo do volume produzido se tornam um problema ambiental. Dessa forma, dentre as vantagens deste material como biossorvente podemos citar sua abundância, baixo custo e a facilidade de obtenção, logo neste trabalho foi utilizado à casca da Noz pecã, visando verificar a eficiência deste biossorvente na remoção do corante violeta cristal.

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Superior Competitive Adsorption Capacity of Natural Bentonite in the Efficient Removal of Basic Dyes from Aqueous Solutions

Said

Goda

2021

ChemistrySelect

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In this study, natural bentonite has been used as a highly efficient, and low‐cost sorbent for the adsorptive removal of methylene blue (MB), crystal violet (CV), and fuchsine basic (FB) dyes from aqueous solutions. X‐ray fluorescence (XRF), Thermogravimetry and differential thermal analyses (TG‐DTA), X‐ray diffraction (XRD), Scanning electron microscopy (SEM), and Fourier transform infrared (FTIR) analyses for bentonite clay were performed. Results revealed that bentonite is an excellent sorbent for the elimination of these dyes with maximum adsorption capacities of 598.8, 929.7 and 875.2 mg g−1 for MB, CV, and FB, respectively. In addition, thermodynamic results reflected that the adsorption process is a spontaneous, endothermic, and of chemisorption nature. While kinetic studies specified that the adsorption of these dyes is ruled by the film diffusion and pore diffusion mechanism. Moreover, simultaneous removal of these dyes from their binary and ternary mixtures was also examined. A Regeneration study demonstrated that, bentonite can be recycled several times with almost the same efficiency.

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Mono and simultaneous removal of crystal violet and safranin dyes from aqueous solutions by HDTMA-modified Spirulina sp.

Cited by 74 publications

References 69 publications

Indigo Carmine and 2,6-Dichlorophenolindophenol Removal Using Cetyltrimethylammonium Bromide-Modified Palm Oil Fiber: Adsorption Isotherms and Mass Transfer Kinetics

Indigo Carmine and 2,6-Dichlorophenolindophenol Removal Using Cetyltrimethylammonium Bromide-Modified Palm Oil Fiber: Adsorption Isotherms and Mass Transfer Kinetics

Uso De Resíduos Da Agroindústria Na Remoção Do Corante Violeta Cristal

Superior Competitive Adsorption Capacity of Natural Bentonite in the Efficient Removal of Basic Dyes from Aqueous Solutions

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