Dye removal using some surface modified silicate minerals

Selim, K. A.; Youssef, Mai M.; El-Rahiem, Fatma H. Abd; Hassan, Mostafa Afifi

doi:10.1016/j.ijmst.2014.01.007

Cited by 26 publications

(10 citation statements)

References 13 publications

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“…It is the most inexpensive and efficient process for treatment of water or wastewater; therefore, it has been widely used for the removal of solutes from solutions and harmful chemicals from environment. It required less investment in terms of the initial cost and land, simple design, no other toxic effect and superior removal of organic waste constituent, compared to the other conventional treatment in water pollution control (Dabrowski 2001;Selim et al 2014).…”

Section: Introductionmentioning

confidence: 99%

Fixed-bed column adsorption study: a comprehensive review

Patel¹

2019

Appl Water Sci

524

200

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Present paper involved the review of fixed-bed column studies for removal of various contaminants from synthetic wastewater. Basic concept of adsorption, its types (i.e., chemisorption and physisorption) and its mechanism, adsorbents and adsorbates were included. Comparison of batch and column adsorption study is mentioned. Complete study of breakthrough curve for designing adsorptive column is interpreted. This paper explicates the detailed explanation of various process parameters and isotherm models for column study. Fixed-bed adsorption studies using various adsorbates, i.e., metal, ion, dye and other hazardous materials, are reviewed, in which adsorption of chromium metal is most exploitable. Conclusion and some challenges for utilization in real world are also exposed.

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Section: Introductionmentioning

confidence: 99%

Fixed-bed column adsorption study: a comprehensive review

Patel¹

2019

Appl Water Sci

524

200

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“…The removal of such dyes from wastewaters is often conducted via membrane filtration, ion-exchange separation, degradation, flotation, chemical oxidation, electrochemical treatment, adsorption [10][11][12][13]. Among these processes, adsorption shows more significant economic potential for removing dyes due to its efficiency, low energy consumption, and easy operation [14,15]. Different types of adsorbents can be used to remove contaminants, such as activated charcoal [16][17][18][19], polymeric [20][21][22][23], and biological materials [24][25][26][27][28].…”

Section: Introductionmentioning

confidence: 99%

Adsorption of Anionic Dye on the Acid-Functionalized Bentonite

et al. 2020

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The efficiency of acid treatment on natural calcium bentonite (natural bentonite) for anionic dye adsorption was investigated using methyl orange (MO) as a probe. Additionally, adsorption experiments were accomplished between the natural bentonite, acidified bentonite, and a cationic dye (methylene blue, MB). Acid functionalization in natural bentonite (RF) was carried out with HCl and H2SO4 acids (RF1 and RF2, respectively). The samples were characterized by chemical analysis, mineralogy, particle size, and thermal behavior with the associated mass losses. The adsorption efficiency of MO and MB dyes was investigated by the effects of the initial concentration of adsorbate (Ci) and the contact time (tc). The acid treatment was efficient for increasing the adsorption capacity of the anionic dye, and the Qmaxexp values measured were 2.2 mg/g, 67.4 mg/g e 47.8 mg/g to RF, RF1 e RF2, respectively. On the other hand, the acid functionalization of bentonite did not significantly modify the MB dye adsorption. The Sips equation was the best fit for the adsorption isotherms. Thus, we found that the acid-functionalized bentonite increases the anionic dye adsorption by up to 8000%. The increased adsorptive capacity of acidified bentonite was explained in terms of electrostatic attraction between the clay surface and the dye molecule.

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“…The process is complex and depends on the chemistry of the surface or the sorbent and sorbate nature, as well as the nature of the solid–liquid system. Thus, adsorption of metal ions from wastewater is a cheap, efficient, non-toxic and environmentally friendly process [ 2 , 3 ].…”

Section: Introductionmentioning

confidence: 99%

Estimation on Fixed-Bed Column Parameters of Breakthrough Behaviors for Gold Recovery by Adsorption onto Modified/Functionalized Amberlite XAD7

Negrea

Mihăilescu

Moșoarcă

et al. 2020

IJERPH

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The objective of this paper was to evaluate the potential of a new adsorbent material to recover Au (III) from real wastewater, in a column with a fixed bed in a dynamic regime. The material was obtained through functionalization, by impregnation of the commercial resin, Amberlite XAD 7 type, with L-glutamic acid, which has active groups –NH2 and –COOH. The goal of the experiments was to follow the correlation of fixed-bed column specific adsorption parameters (the effluent volume, the amounts of adsorbent, heights of the adsorbent layer in column) with the time necessary to cross the column. The experimental data obtained were modeled, using the Bohart–Adams, Yoon–Nelson Thomas and Clark models, to establish the mechanism of the Au (III) recovery process, in a dynamic regime. Also, we established the number of cycles for adsorption–desorption for which the new material can be used. We used 5% HNO3 (5%) as desorption agent in five adsorption–desorption cycles, until the process was no longer efficient. The degree of desorption varied between 84% and 34% from cycle 1 to cycle 5.

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Dye removal using some surface modified silicate minerals

Cited by 26 publications

References 13 publications

Fixed-bed column adsorption study: a comprehensive review

Fixed-bed column adsorption study: a comprehensive review

Adsorption of Anionic Dye on the Acid-Functionalized Bentonite

Estimation on Fixed-Bed Column Parameters of Breakthrough Behaviors for Gold Recovery by Adsorption onto Modified/Functionalized Amberlite XAD7

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