Mesoporous MOF composite for efficient removal of uranium, methyl orange, methylene blue, and Congo red dyes from aqueous solutions

Water is the most crucial thing to mankind and so its contamination by various agencies is posing a threat to the natural balance. So, in the present work, the efficiency of various adsorbents derived from plant waste, to remove different dyes from aqueous solution was evaluated. Parameters for study were contact time, concentration and pH. Various combinations of plant ashes were used for the study. It was found that adsorbent prepared from the combination of orange peels, pomegranate and banana peels ashes, exhibited good adsorption capacity for methylene blue, congo red and crystal violet. All these dyes were completely removed from the aqueous solution while methyl orange was not removed. Congo red was removed completely within 40 min of contact with the adsorbent while methyl orange took 3 hrs to be removed to the extent of 48% only. The adsorption coefficient of congo red was found to be 2.33 while value for methylene blue and crystal violet was 1 and 1.66 respectively. The characterization of adsorbent was done by Scanning Electron Microscopy and IR spectroscopy. SEM image revealed the surface of adsorbent to be made of differential pores. From the results it became evident that the low-cost adsorbent could be used as a replacement for costly traditional methods of removing colorants from water.

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Efficient Removal of Methylene Blue from Aqueous Solutions Using Olive Stone and Rye Straw as Abundant Adsorbents

Recent Advances in Environmental Science from the Euro-Mediterranean and Surrounding Regions - Advances in Science, Technology & Innovation ◽

10.1007/978-3-319-70548-4_41 ◽

2018 ◽

pp. 119-121

Author(s):

Sana Dardouri ◽

Asma Jedidi ◽

Jalila Sghaier

Keyword(s):

Methylene Blue ◽

Aqueous Solutions ◽

Efficient Removal ◽

Olive Stone ◽

Rye Straw

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Green synthesis of Fe3O4-onion peel biochar nanocomposites for adsorption of Cr(VI), methylene blue and congo red dye from aqueous solutions

Journal of Molecular Liquids ◽

10.1016/j.molliq.2021.118161 ◽

2021 ◽

pp. 118161

Author(s):

Anuj Kumar Prajapati ◽

Monoj Kumar Mondal

Keyword(s):

Methylene Blue ◽

Aqueous Solutions ◽

Green Synthesis ◽

Congo Red ◽

Onion Peel ◽

Congo Red Dye ◽

Red Dye

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Mesoporous carbons as adsorbents to removal of methyl orange (anionic dye) and methylene blue (cationic dye) from aqueous solutions

10.5004/dwt.2021.26925 ◽

2021 ◽

Vol 220 ◽

pp. 363-379

Author(s):

Katarzyna Jedynak ◽

Marta Repelewicz ◽

Krystyna Kurdziel ◽

Dariusz Wideł

Keyword(s):

Methylene Blue ◽

Methyl Orange ◽

Aqueous Solutions ◽

Cationic Dye ◽

Mesoporous Carbons ◽

Anionic Dye ◽

Methylene Blue Cationic Dye

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Enhanced Adsorption of Methylene Blue and Congo Red from Aqueous Solutions by MCM-41/HKUST-1 Composites

Asian Journal of Chemistry ◽

10.14233/ajchem.2019.21935 ◽

2019 ◽

Vol 31 (8) ◽

pp. 1675-1682 ◽

Cited By ~ 1

Author(s):

D.O. Sulistiono ◽

E. Santoso ◽

R. Ediati

Keyword(s):

Methylene Blue ◽

Mesoporous Silica ◽

Aqueous Solutions ◽

Congo Red ◽

Metal Organic Framework ◽

Solvent Mixture ◽

Sem Images ◽

Enhanced Adsorption ◽

Xrd Patterns ◽

Mcm 41

Impregnation of mesoporous silica MCM-41 on metal organic framework type HKUST-1 or often called CuBTC (BTC = 1,3,5-benzenetricarboxylate) has been successfully carried out by solvothermal methods in a solvent mixture of water, ethanol and N,N-dimethylformamide (DMF). The XRD patterns of the obtained solids showed that MCM-41/HKUST-1 composites had the same crystalline phase as pure as HKUST-1. SEM images revealed that the impregnation of the mesoporous silica to HKUST-1 did not alter the surface morphology of the original HKUST-1, which had octahedral shapes. In addition, the thermal stability of the MCM-41/HKUST-1 composites reached 302 °C, increased by 292 °C in comparison to the HKUST-1, even though the impregnation process resulted in a decreased in the specific surface area of the composites. Furthermore, MCM-41/HKUST-1 composites showed outstanding performance as adsorbent of methylene blue and Congo red in aqueous solutions. Results of adsorption studies showed that a pseudo-second order kinetics and Langmuir isotherm were observed for both types of dyes.

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Fabrication of MoO3 Nanowire-based Membrane Devices for the Selective Adsorption of Cationic Dyes from Aqueous Solutions with High Performance and Reusability

Micromachines ◽

10.3390/mi10090586 ◽

2019 ◽

Vol 10 (9) ◽

pp. 586 ◽

Cited By ~ 1

Author(s):

Zhang ◽

Park

Keyword(s):

Methylene Blue ◽

Methyl Orange ◽

Aqueous Solutions ◽

Rhodamine B ◽

High Performance ◽

Selective Adsorption ◽

Treatment Method ◽

Cationic Dyes ◽

Adsorption Ability ◽

Anionic Dye

A series of ultralong (up to tens of micrometers) MoO3 nanowire-based membranes were synthesized for the treatment of aqueous solutions containing the cationic dyes methylene blue (MB) and rhodamine B (RhB). This treatment method possesses extremely rapid and superhigh adsorbability (up to 521 and 321 mg/g for MB and RhB, respectively), as well excellent selective adsorption ability of cationic dyes with respect to the anionic dye methyl orange (MO). Moreover, the cationic dyes on the membrane can be desorbed easily, and reusability is good.

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