Scientific Research Publishing

Read  full  paper  at: http://www.scirp.org/journal/PaperInformation.aspx?PaperID=53266#.VLiDt8nQrzE Author(s)    Nour T. Abdel-Ghani 1 , Ghadir A. El-Chaghaby 2* , Enas Mohamed Zahran 3   Affiliation(s) 1 Chemistry Department, Faculty of science, Cairo University, Cairo, Egypt . 2 RCFF, Agricultural Research Center, Giza, Egypt . 3 Holding Company for Water and Wastewater, Greater Cairo Water Company, Cairo, Egypt . ABSTRACT The adsorption of aluminium(III) and iron(III) ions from their single and binary systems, by RHAC was investigated in a batch system. The activated carbon prepared from rice hulls was characterized by scanning electron microscopy and Fourier transformation infrared techniques. Batch adsorption experiments were performed under different operating conditions including pH (2 - 5), adsorbent dosage (0.5 - 2.0 g/l), initial ion concentration (5 - 100 mg/l), and contact time (30 - 240 min). The equilibrium time f...

Read  full  paper  at: http://www.scirp.org/journal/PaperInformation.aspx?PaperID=53252#.VLh-BcnQrzE Author(s)    Rhoda Habor Gumus * , Ideyonbe Okpeku Affiliation(s) Department of Chemical and Petroleum Engineering, Niger Delta University, Wilberforce Island, Nigeria . ABSTRACT Snail shell waste ( Helix pomatia ) has been evaluated as raw material for the preparation of activated carbon using ZnCl 2 and CaCl 2 with the temperature ranging from 500°C to 800°C. The activated carbon prepared was characterized, showing effect of temperature on ash content, pore volume and porosity. The adsorption isotherm for methylene blue was carried out on the activated carbon in a batch study. The adsorbent exhibited excellent adsorption for methylene blue. The experimental data were used for both Langmuir and Freundlich models. The adsorption coefficients of Langmuir isotherm were found to be 0.996 and 0.957 for CaCl 2 and ZnCl 2 while 0.969 an...