Phenol From Aqueous Solution Using Ca-Bentononite/Chitosan Composite

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Adsorption of Phenol from Aqueous Solution Using Ca-Bentonite/Chitosan Composite Poedji Loekitowati Hariani, Fatma, Fahma Riyanti, and Hesti Ratnasari Department of Chemistry, University of Sriwijaya Jalan Palembang Prabumulih Km 32. Ogan Ilir Email: Abstract The synthesize chitosan from shrimp shell waste and Ca-bentonite for producing Ca-bentonite/chitosan composite has been conducted. Ratio of weight of chitosan and Ca-bentonite is 1:5. The Ca-bentonite/chitosan composite is used to remove phenol from aqueous solution. Batch adsorption studies were performed to evaluate the effects of some parameters such as initial concentration of phenol, composite weight, pH and contact time. Characterization of Ca-bentonite/chitosan…show more content…
Specific adsorptions of Ca-bentonite within composite appeared on wave numbers of 1033.8 cm-1 and 912.3 cm-1. SEM-EDX Characterization shows the presence of carbon and nitrogen in the composite…show more content…
The mixture was stirred at 200 rpm for 1 h. Bentonite (50 g) was slowly added into the solution and was stirred for 2 h. The composite were centrifuged at 3000 rpm for 30 minutes. After that, composite was filtered, and washed with deionized water until neutral pH, and then dried in oven at 70 °C for 1 h. The composite were characterized using FTIR, and SEM-EDX. Adsorption experiment Adsorption experiment were carried out with 100.0 mL of phenol solution at a constant speed of 120 rpm at room temperature. The adsorption of phenol onto composite Ca-bentonite/chitosan was studied under different conditions including initial concentration of phenol (50, 75, 100 and 125 mg L-1), weight of composite (1, 2, 3 and 4 g), solution pH (5, 6, 7, 8 and 9) and contact time (30, 45, 60, 75 and 90 minutes). Concentration of phenol was measured using spectrophotometer UV-Vis. The amount of phenol adsorbed was calculated from following equation. qt = where qt is the adsorption capacity of the composite (mg g-1) at equilibrium; and are the initial and equilibrium phenol concentration (mg L-1), respectively; V is the volume of solution (L) and ms is the mass of composite

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