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Unformatted text preview: ring, Universiti Malaysia Pahang, 26300, Kuantan, Pahang, Malaysia E-mail: [email protected] Phenol is a potential hazard to human health and the environment. Sonication for phenol degradation has proved to be an attractive process over the years. Currently, sonication process was involving catalyst in improving the degradation process. In this research, sonication was performed with addition of salt to replace the catalyst to make it cost effective method. The degradation of phenol in aqueous solution was investigated using 60 kHz ultrasonic reactor. The experiments were performed at initial concentrations varying from 20 to 50 mg/L, different temperature in th e range of 40 - 90 °C and pH of phenol solution ranging from 1 - 4. The study of effect of salt was performed by comparison the phenol degradation with and without salt (NaCl) for each parameter. The higher percentage of phenol degradation was at 20 mg/L of initial concentration, pH 1 and at temperature 70 °C which is 10.2, 28.3 and 17.3 % phenol degradation, respectively. The sonication with addition of salt shows improvement in % of phenol degradation whereby its degradation are 14.4 , 31.2 and 21.3 %, respectively. It shows that the % degradation of phenol using sonication process can be improved with addition of salt. 110 3rd ICYC 2010 Universiti Sains Malaysia ENV-P17 23rd-25th June 2010 ELECTROGENERATIVE REDUCTION OF HEXAVALENT CHROMIUM TO TRIVALENT CHROMIUM USING A GALVANIC FLOW-BY BATCH-RECYCLE REACTOR N Mohamed, KW Phneh, WX Tan and N Aminuddin School of Chemical Sciences, Universiti Sains Malaysia, 11800 Pulau Pinang, Malaysia E-mail: [email protected] Studies on the electrogenerative reduction of hexavalent chromium to trivalent chromium were done using a flow-by cell. Reticulated vitreous carbon (RVC) was used as the cathode while the anode used was steel-wool. The influence of flow-rate, initial catholyte concentration and removal of dissolved oxygen from the test solutions on the spontaneous reduction proces s were studied using acidified potassium di...
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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.
- Spring '11