Adsorption of Zn2+ from Synthetic Wastewater Using Dried Watermelon Rind (D-WMR): An Overview of Nonlinear and Linear Regression and Error Analysis
| Autor: | Abdullah Faisal Alshalif, Wahid Ali Hamood Altowayti, Norzila Othman, Syazwani Mohd Asharuddin, Adel Al-Gheethi, Nur Hasniza binti Mohd Dzahir, Ibrahim M. Nasser, Husnul Azan Tajarudin, Faris Ali Hamood AL-Towayti |
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| Jazyk: | angličtina |
| Rok vydání: | 2021 |
| Předmět: |
Langmuir
Materials science Scanning electron microscope Kinetics Analytical chemistry Pharmaceutical Science Wastewater Article Water Purification Analytical Chemistry Citrullus QD241-441 Adsorption Drug Discovery Linear regression Physical and Theoretical Chemistry watermelon rind Organic Chemistry isotherm Zn2+ Hydrogen-Ion Concentration Mesoporous silica Zinc Chemistry (miscellaneous) adsorption kinetics Linear Models Thermodynamics Molecular Medicine Particle size |
| Zdroj: | Molecules Volume 26 Issue 20 Molecules, Vol 26, Iss 6176, p 6176 (2021) |
| ISSN: | 1420-3049 |
| DOI: | 10.3390/molecules26206176 |
| Popis: | Sustainable wastewater treatment is one of the biggest issues of the 21st century. Metals such as Zn2+ have been released into the environment due to rapid industrial development. In this study, dried watermelon rind (D-WMR) is used as a low-cost adsorption material to assess natural adsorbents’ ability to remove Zn2+ from synthetic wastewater. D-WMR was characterized using scanning electron microscope (SEM) and X-ray fluorescence (XRF). According to the results of the analysis, the D-WMR has two colours, white and black, and a significant concentration of mesoporous silica (83.70%). Moreover, after three hours of contact time in a synthetic solution with 400 mg/L Zn2+ concentration at pH 8 and 30 to 40 °C, the highest adsorption capacity of Zn2+ onto 1.5 g D-WMR adsorbent dose with 150 μm particle size was 25 mg/g. The experimental equilibrium data of Zn2+ onto D-WMR was utilized to compare nonlinear and linear isotherm and kinetics models for parameter determination. The best models for fitting equilibrium data were nonlinear Langmuir and pseudo-second models with lower error functions. Consequently, the potential use of D-WMR as a natural adsorbent for Zn2+ removal was highlighted, and error analysis indicated that nonlinear models best explain the adsorption data. |
| Databáze: | OpenAIRE |
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