Highly efficient hydrotalcite-based adsorbent for aqueous-phase cationic dye removal: structural features, kinetics and isotherm study

Batch biosorption parametric experiments were carried out to delineate the removal mechanism of cationic dye, namely, Safranin O, from the aqueous phase using biosorbent prepared from wood rotting dead macro fungus ’Fomitopsis carnea‘. Experimental data of the kinetic experiments at various temperatures (19, 27 and 35 °C) were well described using pseudo-second order kinetic models. Raising temperature from 19 to 35 °C enhanced the dye uptake potential of the biosorbent from 1,000 to 1,250 mg/g. The other variables studied were the effect of common salt (NaCl) and pH on the dye removal potential of the biosorbent. Decreased dye removal (%) efficiency at higher salt concentration suggests involvement of an ion-exchange type sorption mechanism. The pH study revealed that dye removal may occur due to the existence of an electrostatic attraction force between negatively charged biosorbent particles and dye cation. However desorption using mineral acid (H2SO4 and HCl) exhibited the highest desorption up to 76%, followed by organic acid (52%) and distilled water (not more than 2%) indicating the possibility of ion-exchange as the dominating dye sorption mechanism. Fourier transform infrared (FT–IR) spectroscopy analysis of the biosorbent, Safranin O and Safranin O loaded biosorbent also supported the possibility of ion-exchange as the dominating mechanism due to the presence of major peaks of Safranin O on the IR spectra of Safranin O loaded biosorbent, indicating that the Safranin O was present in its unaltered form on the surface of the biosorbent.

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Poly(sodium styrene sulfonate) functionalized graphene as a highly efficient adsorbent for cationic dye removal with a green regeneration strategy

Journal of Physics and Chemistry of Solids ◽

10.1016/j.jpcs.2021.109973 ◽

2021 ◽

Vol 152 ◽

pp. 109973

Author(s):

Mengru Hong ◽

Yake Wang ◽

Rong Wang ◽

Yuanqiang Sun ◽

Ran Yang ◽

...

Keyword(s):

Dye Removal ◽

Cationic Dye ◽

Functionalized Graphene ◽

Regeneration Strategy ◽

Styrene Sulfonate ◽

Highly Efficient ◽

Sodium Styrene Sulfonate ◽

Efficient Adsorbent

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Solution Plasma-Assisted Green Synthesis of MnO2 Adsorbent and Removal of Cationic Pollutant

Journal of Chemistry ◽

10.1155/2019/7494292 ◽

2019 ◽

Vol 2019 ◽

pp. 1-7 ◽

Cited By ~ 3

Author(s):

Hye-min Kim ◽

Nagahiro Saito ◽

Dae-wook Kim

Keyword(s):

Methylene Blue ◽

Green Synthesis ◽

Dye Removal ◽

Synthesis Method ◽

Structural Features ◽

Environmentally Benign ◽

Cationic Dye ◽

Removal Mechanism ◽

Initial Concentration ◽

Benign Synthesis

In this study, we proposed the solution plasma- (SP-) assisted green synthesis method using plants extracts, i.e., glucose, with the expectation of acting as a reducing agent and promotor for the formation of powder state of nanostructured MnO2. MnO2 was simply and rapidly synthesized within 10 min by the SP-assisted method. The structural features and morphology of as-synthesized MnO2 were characterized by XRD, Raman, FE-SEM, and TEM analyses. For potential application of as-synthesized MnO2, cationic dye, i.e., methylene blue (MB), removal performance was investigated by batch experiment at an initial concentration of C0 = 100 mg L−1. The obtained MnO2 exhibited effective dye removal ability given high C0, and simultaneously applied plasma discharging further enhanced removal efficiency. These contributions therefore open a new window not only on a powerful and environmentally benign synthesis route for efficient adsorbents but also on supporting multiple removal mechanism.

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Comparison between nano zero valent iron supporting onto activated carbon collected via two types of reagents statistically: Carbon for cationic dye removal

Journal of Physics Conference Series ◽

10.1088/1742-6596/1853/1/012016 ◽

2021 ◽

Vol 1853 (1) ◽

pp. 012016

Author(s):

A K Hammed ◽

I K Al-Asfoor ◽

A K Al-Dahan

Keyword(s):

Activated Carbon ◽

Dye Removal ◽

Zero Valent Iron ◽

Cationic Dye ◽

Nano Zero Valent Iron

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From metal–organic frameworks to magnetic nanostructured porous carbon composites: towards highly efficient dye removal and degradation

RSC Advances ◽

10.1039/c4ra15942j ◽

2015 ◽

Vol 5 (11) ◽

pp. 8228-8235 ◽

Cited By ~ 32

Author(s):

Cong Zhang ◽

Fanggui Ye ◽

Shufen Shen ◽

Yuhao Xiong ◽

Linjing Su ◽

...

Keyword(s):

High Temperature ◽

Porous Carbon ◽

Carbon Material ◽

Dye Removal ◽

Metal Organic Framework ◽

Metal Organic Frameworks ◽

Porous Carbon Material ◽

Carbon Composites ◽

Highly Efficient ◽

Metal Organic

A magnetic nanostructured porous carbon material (γ-Fe2O3/C) was easily synthesized using a microwave-enhanced high-temperature ionothermal method with an iron terephthalate metal–organic framework-MIL-53(Fe), as a template.

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