2022
DOI: 10.1155/2022/3137870
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Adsorptive Removal of Alizarin Red S onto Sulfuric Acid-Modified Avocado Seeds: Kinetics, Equilibrium, and Thermodynamic Studies

Abstract: The present work evaluates the synthesis of a novel, inexpensive, and environmentally friendly chemically-treated avocado seed powder (CTASP) as an adsorbent in removing alizarin red S (ARS) from synthetic solution. By using a set of analytical techniques, including FTIR, XRD, EDX, RS, and SEM, the adsorbent was characterized for its physical and chemical properties. Batch study experiments were conducted to determine the effectiveness of the CTASP as an adsorbent. The maximum adsorption capacity of 67.08 mgg-… Show more

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Cited by 6 publications
(9 citation statements)
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“…Figure 2(c) displays the trapped RhB molecules in the active site region, and it confirms its effectual nature. The removal of Alizarin Red dye using chemically activated avocado seed powder follows the same pattern, where the adsorbent was chemically activated by using sulphuric acid to enhance its adsorptive properties [31].…”
Section: Resultsmentioning
confidence: 99%
“…Figure 2(c) displays the trapped RhB molecules in the active site region, and it confirms its effectual nature. The removal of Alizarin Red dye using chemically activated avocado seed powder follows the same pattern, where the adsorbent was chemically activated by using sulphuric acid to enhance its adsorptive properties [31].…”
Section: Resultsmentioning
confidence: 99%
“…These molecules further diffuse into the interior part of the adsorbent pore. Adsorption takes place at the pore end of the adsorbent, while intraparticle diffusion occurs within the interior pores of the adsorbent [48]. The intraparticle diffusion model is given as follows: (17) Q t = K t t 1 / 2 + C . …”
Section: Resultsmentioning
confidence: 99%
“…After dye adsorption, the recovery and reusability of the hydrogels were the key factors for their potential application in cost-effective wastewater treatment. , Three cycles of adsorption/desorption of ARS by these hydrogels were conducted following a reported protocol . Typically, a dried hydrogel (20 mg) was agitated in 3 mL of an aqueous ARS dye solution (20 × 10 –5 M) for 48 h to reach equilibrium.…”
Section: Methodsmentioning
confidence: 99%
“…27,28 Three cycles of adsorption/desorption of ARS by these hydrogels were conducted following a reported protocol. 29 Typically, a dried hydrogel (20 mg) was agitated in 3 mL of an aqueous ARS dye solution (20 × 10 −5 M) for 48 h to reach equilibrium. The dye-loaded hydrogels were then taken out, washed with Milli-Q water, freeze-dried, and placed in a beaker containing 30 mL of 1 M NaOH and kept in the dark with continuous stirring for 24 h to leach out the adsorbed dye molecules.…”
Section: ■ Introductionmentioning
confidence: 99%