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Unformatted text preview: n E. cottonii and carrageenan were determined by ion chromatography using 1.0 mM trimellitic acid as mobile phase. It was successful to separate cations with flow rate 0.8 mL/min, at room temperature, injection volume 20 µL by cationexchange-column TSKgel super-IC-Cation coulumn (150 x 4.6 mm id) from Tosoh (Tokyo, Japan) and + + + 2+ 2+ conductivity detection could separate Na , NH4 , K , Mg and Ca less than 30 minutes with RSD between 0.02 - 0.37 and anions with flow rate of eluent 1.4 mL/min, Columns TSK gel super IC-anion 2-2PWXL (50 x 4.6 mm id) could separate F , HPO4 , NO2 , Cl , Br , NO3 , I , SO4 less than 15 minutes with RSDs between 0.00 - 0.45. On the other hand by using two packed column suppressors system with sodium carbonate-bicarbonate 1.2:1.4 mM as a mobile phase with flow rate 0.7 mL/min was maintained at low detection limits. The relative standard deviations (RSDs) for the retention time, peak area and 22peak height of eight common inorganic anions (0.3 mM each of F , Cl , NO2 , Br , NO3 , HPO4 , SO4 and I ) were between 0.0 - 0.2, 0.1 - 0.4 and 0.1 - 0.3 %, respectively. While heavy metals such as B, Al, Na, Cr, Mn, Fe, Ni, Cu, Zn, Mo, Cd, Pb were determined by ICP-MS. Moreover batch experiment was conducted to determine the cadmium biosorption capacities of carrageenan and E. cottonii. Biosorption capacity of cadmium was 3.87, 3.84 and 0.95 mg/g for pure carrageenan, extracted carrageenan, and E. cottonii, respectively. ENV-O18 IMMOBILIZED TiO2-CHITOSAN SYNERGISTIC PHOTOCATALYST-ADSORPTION BILAYER SYSTEM FOR THE REMOVAL OF REACTIVE RED 4 Sheilatina Ismail, *Mohd Asri Nawi and Sumiyyah Sabar School of Chemical Sciences, Universiti Sains Malaysia, 11800 Minden, Pulau Pinang, Malaysia E-mail: [email protected] A study of immobilized TiO2-Chitosan synergistic photocatalyst-adsorption bilayer system for the photodegradation of an anionic dye reactive red 4 (RR4) under low energy light source had been conducted. Photocatalysis was conducted by immobilizing a layer of TiO 2 on top of CS/glass to form a layer by layer TiO2/Cs/glass system. Control test of photolysis, adsorption and photocatalytic activities of TiO2/g...
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This note was uploaded on 02/17/2011 for the course CHEMISTRY 101 taught by Professor Csr during the Spring '11 term at University of Louisville.

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