The generation and elimination of the protonic acid

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Unformatted text preview: S A SPECIFIC CARRIER Olly Norita Tetra, Admin Alif and Zaharasmi Kahar Department of Chemistry, Faculty of Mathematics and Natural Sciences, Andalas University, Padang 25163, Indonesia E-mail: olly512@yahoo.com The transport of copper ions from aqueous solutions across a bulk liquid membrane by using 8 -hidroxy quionoline (oxine) dissolved in chloroform has been studied at ambient temperature. Effect of carrier concentration, volume of organic phase, pH of feed phase, type and concentrations of receiving phase, 2+ and time of transport on the flux for Cu across the membrane have been studied, being optimized by -4 the simple method. The transported amount of the copper ions (initial concentrations 3.14 x 10 M) -4 across a chloroform solution of oxine 17.5 x 10 M into the receiving phase H 2SO4 0.15 M was found to 2+ be 97.3 % after 6 hours. The selectivity and efficiency of Cu transport from an aqueous solution 2+ 2+ 2+ 3+ containing other cations, such as Co , Ni , Cd and Fe ions, were investigated. It was found that none 2+ of these cations interfered with Cu transport. 216 3rd ICYC 2010 Universiti Sains Malaysia PHY-P2 23rd-25th June 2010 APPLICATION OF CASHEW SHELL AS ACTIVATED CARBON USED AS COATING MATERIAL FOR UREA AND ITS TESTING TOWARD NITROGEN REDUCTION IN UREA Betty Marita Soebrata, Asep Nugraha Ardiwinata and Jayanti Primandini Department of Chemistry, Faculty of Mathematics and Science, Bogor Agricultural University, Bogor, Indonesia E-mail: bettymarita@gmail.com Cashew shell (Anacardium occidentale) is agricultural waste that can be used as activated carbon material. Activated carbon from cashew shell, which is physically activated, could comply with the Indonesian Standard (SNI). In this research, degree of nitrogen reduction in urea which was coated with various particle size of activated carbon (60, 80 and 100 mesh) and comparison between activated carbon and urea (30:70, 20:80 and 10:90) were studied. The best result of the coated urea was using of 100 mesh with composition of activated carbon: urea 30:70. The act ivated carbon as a coating material for urea caused the decreasing of evaporation from 0.22 to 0.03 % with efficiency value of 86.36 %. Meanwhile, the amount of nitrogen in urea that dissolved in water after solubility and crac ke...
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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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