Synthesis of adsorbents from wheat hulls, extracted cellulose and modified with Cetyl trimethyl ammonium chloride to remove Congo Red in aqueous solution

Villabona-Ortíz, Ángel; Ortega‐Toro, Rodrigo; Aguilar-Bermúdez, Fabián; Pájaro-Moreno, Yerardin

doi:10.24275/rmiq/ia2426

Cited by 1 publication

(1 citation statement)

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“…Thus, it can be suggested that, Regarding the MCC, it was found that the removal efficiency was in the range of 95.22 to 99.12%, finding a positive effect of the initial concentration of tartrazine and dismissing the processes resistant to diffusion and the mass transfer from the bulk of the solution. It was also observed that the rise in the amount of adsorbent produced a growth in the removal percentage because of the augmentation of the active sites on the adsorbent [70]. Although the initial concentration effect on the removal of tartrazine was positive, an antagonistic phenomenon of the adsorbent dose in terms of the adsorption capacity was obtained due to the split in the concentration gradient between the solute concentration in the solution and on the adsorbent surface [62].…”

Section: Effect Of Adsorbent Dosage and Initial Concentrationmentioning

confidence: 99%

Evaluation of Adsorbent Biomaterials Based on Coconut Mesocarp for Treatment of Wastewater Contaminated with Tartrazine Dye

Tejada-Tovar,

Villabona-Ortiz,

Aguilar-Bermúdez

et al. 2023

Processes

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The presence of synthetic dyes in industrial wastewater poses significant environmental and health concerns due to their persistent nature and potential toxicity. Tartrazine is a synthetic yellow dye known for its stability and resistance to conventional treatment methods. As a result, its discharge into natural water bodies can lead to adverse ecological impacts and can jeopardize public health. The objective of this work was to functionalize coconut shells (CSs), coconut cellulose (CC), and modified coconut cellulose (MCC) bioadsorbents with cetyl trimethyl ammonium chloride (CTAC) for their use in the elimination by adsorption of the dye tartrazine in aqueous solutions. CC was synthesized through a double extraction with sodium hydroxide, and a chemical treatment was performed with CTAC at 100 mmol L−1. The final dye concentration was determined through UV-Vis at 500 nm. An FTIR analysis showed multiple active sites, represented in groups such as hydroxyl, COO-, NHx-, and hydrocarbon compounds. Increasing the initial concentration had a positive effect on the efficiency of the process, reaching 99% removal with an adsorption capacity of 11.89 mg/g at equilibrium using MCC. The test showed that equilibrium was reached after 30 min. Initially, the removal of the dyes was rapid, about 97% of the contaminant being removed in the first 5 min. The Langmuir and Freundlich models were satisfactorily fitted to the adsorption isotherm, showing physical and chemical adsorption. It can be concluded that MCC is a promising bioadsorbent for the removal of tartrazine dye in aqueous solutions.

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Section: Effect Of Adsorbent Dosage and Initial Concentrationmentioning

confidence: 99%