Abstract
In this study, a renewable and effective bio-adsorbent was derived from Malaysian durian seeds (DSs) to act as a promising biosorbent for phytoremediation application towards removal of a hazardous cationic dye (crystal violet, CV) from aqueous environments. The physiochemical characteristics of DS were investigated by several analytical methods such as FTIR, TGA-DTG, BET, pHpzc, and SEM-EDX. Subsequently, a statistical optimization for CV removal by DS was carried out via Box-Behnken design (BBD) and numerical desirability function. In this regard, four operational factors that affect CV adsorption, i.e., DS dosage (0.02–0.1 g), initial pH (4–10), temperature (25–50 °C), and adsorption time (5–25 min) were optimized by BBD and numerical desirability function. Hence, the highest CV removal (93.91%) was recorded under the optimal conditions found through desirability function as follows: DS dosage of 0.081 g, solution pH = 9.9, working temperature = 34.6 °C, and contact time = 24.9 min. Furthermore, ANOVA test indicated the significant parametric interactions towards CV removal (%) can be observed between AB (DS dose vs. initial pH), AD (DS dose vs. time), and BC (initial pH vs. temperature) interactions. The adsorption kinetic process was well described by a pseudo-second-order model. Subsequently, the adsorption equilibrium isotherm was well presented by Freundlich and Temkin isotherm models with maximum adsorption capacity of 158 mg/g. Thus, the thermodynamic functions revealed that the adsorption process was spontaneous and endothermic in nature. The adsorption mechanism of CV on the DS surface can be ascribed to the electrostatic forces, n-π stacking, and H-bonding interactions. Thus, the output of the research work indicates the potential applicability of DS as a renewable and effective biosorbent for the removal of CV from aqueous environments.
| Original language | English |
|---|---|
| Pages (from-to) | 12441-12454 |
| Number of pages | 14 |
| Journal | Biomass Conversion and Biorefinery |
| Volume | 14 |
| Issue number | 11 |
| DOIs | |
| State | Published - Jun 2024 |
| Externally published | Yes |
Bibliographical note
Publisher Copyright:© The Author(s), under exclusive licence to Springer-Verlag GmbH Germany, part of Springer Nature 2022. Springer Nature or its licensor holds exclusive rights to this article under a publishing agreement with the author(s) or other rightsholder(s); author self-archiving of the accepted manuscript version of this article is solely governed by the terms of such publishing agreement and applicable law.
UN SDGs
This output contributes to the following UN Sustainable Development Goals (SDGs)
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SDG 15 Life on Land
Keywords
- Adsorption
- Biomass
- Box-Behnken design
- Crystal violet dye
- Durian seed
ASJC Scopus subject areas
- Renewable Energy, Sustainability and the Environment
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