Removal of anionic (Acid Yellow 17 and Amaranth) dyes using aminated avocado (Persea americana) seed powder: adsorption/desorption, kinetics, isotherms, thermodynamics, and recycling studies
- 6 January 2021
- journal article
- research article
- Published by Informa UK Limited in International Journal of Phytoremediation
- Vol. 23 (9), 911-923
- https://doi.org/10.1080/15226514.2020.1866491
Abstract
Aminated avocado seed powder (AASP)—an eco-friendly novel adsorbent has been used for the removal of Acid Yellow 17 (AY 17) and Amaranth (AMR) from an aqueous phase. The AASP (before and after adsorption) was systematically characterized by different analytical techniques such as FT-IR, FESEM, EDX, and N2 adsorption-desorption analysis. Non-linear form of various kinetic (PFO and PSO) and isotherm (Langmuir and Freundlich) models were used to examine the adsorption behavior of AY 17 and AMR onto AASP. The adsorption of AY 17 and AMR onto AASP was well illustrated by the PSO kinetic model and Langmuir isotherm models. At 303 K, the maximum adsorption capacities (obtained from the Langmuir) of the AASP for AY 17 and AMR was 42.7 and 89.2 mg/g, respectively. The AY 17 and AMR adsorption was strongly pH-dependent with an optimum pH value of 2.0. Activation energy was calculated as 12.3 and 16.3 kJ/mol for AY 17 and AMR respectively, suggesting physical adsorption. The positive values of ΔGo and ΔHo indicated that the adsorption process of AY 17 and AMR onto AASP was non-spontaneous and endothermic. The negligible loss of adsorption capacity and excellent regeneration of AASP were observed for the five cycles. Statement of novelty: The present research majorly focused on the synthesis of adsorbent from Avocado seed for the removal of Acid Yellow 17 and Amaranth anionic dyes from aqueous solution. Although the literature is available on direct seed powder as adsorbent, to the best of our knowledge, no chemical modified adsorbent synthesis was not available. Hence, to fill the gap in the literature, we chose the following study that significantly enhanced the adsorption efficiency of the selected anionic dyes.Keywords
Funding Information
- Minister of Science and Technology (MOST), Taiwan
This publication has 57 references indexed in Scilit:
- Adsorption characteristics of alumina nanoparticles for the removal of hazardous dye, Orange G from aqueous solutionsArabian Journal of Chemistry, 2019
- Pine Cone biomass as an efficient precursor for the synthesis of activated biocarbon for adsorption of anionic dye from aqueous solution: Isotherm, kinetic, thermodynamic and regeneration studiesSustainable Chemistry and Pharmacy, 2018
- Removal of reactive yellow 145 by adsorption onto treated watermelon seeds: Kinetic and isotherm studiesSustainable Chemistry and Pharmacy, 2018
- A comparative study of the amaranth azo dye adsorption/desorption from aqueous solutions by layered double hydroxidesApplied Clay Science, 2017
- Adsorption dynamics, diffusion and isotherm models of poly(NIPAm/LMSH) nanocomposite hydrogels for the removal of anionic dye Amaranth from an aqueous solutionApplied Clay Science, 2016
- Adsorption of dyes using different types of clay: a reviewApplied Water Science, 2015
- Rapid scavenging of methylene blue dye from a liquid phase by adsorption on alumina nanoparticlesRSC Advances, 2015
- Preliminary investigation of mixed adsorbents for the removal of copper and methylene blue from aqueous solutionsChemical Engineering Journal, 2014
- Removal of acid yellow-17 dye from aqueous solution using eco-friendly biosorbentDesalination and Water Treatment, 2013
- Adsorption of Amaranth Dye onto Alumina Reinforced PolystyreneCLEAN - Soil, Air, Water, 2010