%O cited By 12
%J Molecules
%L scholars14361
%D 2021
%R 10.3390/molecules26206176
%N 20
%X 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. © 2021 by the authors. Licensee MDPI, Basel, Switzerland.
%K zinc, adsorption; chemistry; Citrullus; isolation and purification; kinetics; pH; procedures; statistical model; thermodynamics; wastewater; water management, Adsorption; Citrullus; Hydrogen-Ion Concentration; Kinetics; Linear Models; Thermodynamics; Waste Water; Water Purification; Zinc
%T Adsorption of Zn2+ from synthetic wastewater using dried watermelon rind (D-WMR): An overview of nonlinear and linear regression and error analysis
%I MDPI
%A W.A.H. Altowayti
%A N. Othman
%A A. Al-Gheethi
%A N.H.B.M. Dzahir
%A S.M. Asharuddin
%A A.F. Alshalif
%A I.M. Nasser
%A H.A. Tajarudin
%A F.A.H. Al-Towayti
%V 26