| Autor: |
Bassyouni M; Department of Chemical and Materials Engineering, King Abdulaziz University, Rabigh 21911, Saudi Arabia.; Department of Chemical Engineering, Faculty of Engineering, Port Said University, Port Said 42526, Egypt., Zoromba MS; Department of Chemical and Materials Engineering, King Abdulaziz University, Rabigh 21911, Saudi Arabia.; Chemistry Department, Faculty of Science, Port Said University, Port Said 42521, Egypt., Abdel-Aziz MH; Department of Chemical and Materials Engineering, King Abdulaziz University, Rabigh 21911, Saudi Arabia.; Chemical Engineering Department, Faculty of Engineering, Alexandria University, Alexandria 21544, Egypt., Mosly I; Department of Civil Engineering, King Abdulaziz University, Rabigh 21911, Saudi Arabia. |
| Abstrakt: |
In the present study, nanocellulose was extracted from palm leaves to synthesize nanocellulose/chitosan nanocomposites for the removal of dyes from textile industrial wastewater. Nanocellulose is of interest in water purification technologies because of its high surface area and versatile surface chemistry. Following bleach, alkali, and acid treatments on palm leaves, nanocellulose is obtained as a white powder. The produced nanocellulose was investigated. The adsorption capacity of chitosan, nanocellulose, and novel synthetic nanocellulose/chitosan microbeads (CCMB) for direct blue 78 dye (DB78) removal was studied. A series of batch experiments were conducted in terms of adsorbent concentration, mixing time, pH, dye initial concentration, and nanocellulose concentration in synthetic microbeads. The CCMB was characterized by using physicochemical analysis, namely Brunauer-Emmett-Teller (BET), scanning electron microscope (SEM), zeta potential analysis, and Fourier-transform infrared spectroscopy (FTIR). It was found that the surface area of synthetic CCMB is 10.4 m 2 /g, with a positive net surface charge. The adsorption tests showed that the dye removal efficiency increases with an increasing adsorbent concentration. The maximum removal efficiencies were 91.5% and 88.4%, using 14 and 9 g/L of CCMB-0.25:1. The initial dye concentrations were 50 and 100 mg/L under acidic conditions (pH = 3.5) and an optimal mixing time of 120 min. The equilibrium studies for CCMB-0.25:1 showed that the equilibrium data were best fitted to Langmuir isothermal model with R 2 = 0.99. These results revealed that nanocellulose/chitosan microbeads are an effective eco-adsorbent for the removal of direct blue 78 dye and provide a new platform for dye removal. |
