Evaluation of Eucalyptus leaves as an adsorbent for decolorization of Methyl Violet (2B) dye in contaminated waters: Thermodynamic and Kinetics model

Globally, environmental pollution is an important issue. Various pollutants present in water resources, such as bacteria, heavy-metal ions, and organic pollutants, cause serious problems to the environment, animals, plants, and human health. Among the water resources, pollutants, dyestuff, which is discharged from dyeing, textile, and other industrial processes, is an important class of pollutants. Removing these dye pollutants from water resources and wastewater is vital and important due to their toxicity. In this work, a CrFeO3-carbon nanotube (CNT) adsorbent was synthesized using environmentally friendly methods. The synthesized CrFeO3-CNT adsorbent was characterized stoichiometrically, spectroscopically, and morphologically. The synthesized CrFeO3-CNT adsorbent was tested for the removal of two dyes: Methyl violet 2B (MV) and Azocarmine G2 (AC) from an aqueous solution. Crushing CrFeO3 composite with multi-walled fullerene CNT to prepare CrFeO3-CNT adsorbent improved the adsorption performance of free multi-walled fullerene CNT towards MV dye by 30% and towards AC dye by 33.3%.

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Effective and Simple NaOH-Modification Method to Remove Methyl Violet Dye via Ipomoea aquatica Roots

Adsorption Science & Technology ◽

10.1155/2021/5932222 ◽

2021 ◽

Vol 2021 ◽

pp. 1-12

Author(s):

Yie Chen Lu ◽

Muhammad Raziq Rahimi Kooh ◽

Linda Biaw Leng Lim ◽

Namal Priyantha

Keyword(s):

Adsorption Process ◽

Solution Treatment ◽

Methyl Violet ◽

Coefficient Of Determination ◽

Isotherm Models ◽

Batch Adsorption ◽

Maximum Adsorption Capacity ◽

Methyl Violet 2B ◽

Naoh Solution ◽

Regeneration Experiment

In this study, a simple chemical modification was applied to a sustainable and abundantly available resource, kangkong root (KR), to remove methyl violet 2B (MV) dye. The chemically modified adsorbent (NaOH-KR) was obtained using NaOH solution treatment. Batch adsorption experiments were carried out to investigate the effects of pH, ionic strength, contact time, adsorbent dosage, and initial dye concentration. A regeneration experiment was also carried out to assess the potential of reusability. The adsorption process was modelled using various kinetics and isotherm models, whereby the best-fitting models were evaluated by using the coefficient of determination ( R 2 ) and error functions. The Sips ( R 2 = 0.9714 , χ2 =0.16) and pseudo-second-order ( R 2 = 0.9996 , χ 2 = 0.007 ) models were identified to best represent the adsorption process. The Sips model predicted a maximum adsorption capacity at 551.5 mg g-1 for NaOH-KR, which is 55% improvement in performance when compared to nonmodified KR. Lastly, the regeneration experiment showed that NaOH-KR was able to maintain reasonable dye removal even after five consecutive cycles of regenerating and reusing.

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Ipomoea aquatica root as a new potential adsorbent to remove methyl violet 2B dye in simulated dye contaminated wastewater

10.5004/dwt.2020.25933 ◽

2020 ◽

Vol 197 ◽

pp. 368-378

Author(s):

Yie Chen Lu ◽

N. Priyantha ◽

Linda B.L. Lim ◽

Abdul Hanif Mahadi ◽

Nuraina Afiqah Mohammad Zain

Keyword(s):

Methyl Violet ◽

Ipomoea Aquatica ◽

Methyl Violet 2B

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