International Science Community Association Research Journal of Chemical Sciences 2231 - 606X 1 5 2011 August 18 Removal of As (III) from Aqueous Solution by Biosorption onto Maize (Zea mays) Leaves Surface: Parameters Optimization Sorption Isotherm, Kinetic and Thermodynamics Studies 73 79 EN Chaudhary Rakhi 1 Dept. of Applied Sc. and Humanities, Haryana Engineering College, Jagadhri – 135003, Haryana, INDIA Shelly 2 Bhatnagar Deepa 1 Acoustics and Ultrasonic Standard, NPL (CSIR) New Delhi-12, INDIA Joshi Deepa 2 C.C.S. University, Meerut, U.P., INDIA Gupta Reeta 3 Kumar Yudhisther 4 Kumar Ashok 5 Jain C.L. 6 JassimAbdulrazaq Ala'a 1 Packed columns are used for the removal of contaminated gases such as carbon dioxide from drinking water and industrial wastewater. The packed columns are useful for achieving mass transfer between two phases, gas and liquid. This paper inspects the performance of two separation units. In the first step, the efficiency of the de-carbonator system will be specified, and then the capability of improving the rate of dissolved gas removal by using professional types of packing will be evaluated. The concentration of solute (CO) in a dispersed phase (water) has measured as a function of packing height. Also, new correlations for mass transfer coefficient in the gas phase have been predicted. In the second step, the examination of the sedimentation tank performance will be tested, by using the jar test, and then the best chemical additives concentration will be specified. The results show that the rate of dissolved gas removal can be improved when the area of contact between the gas and liquid streams is increased by using the professional types of packing. Also, the accuracy of chemical dosing for polyelectrolyte and ferric chloride in the sedimentation section improves the performance of the pretreatment section and reduces the chemical additives consumption. The backwash processes for sand filters and the period of replacement for fine filters has been improved after regulating the methods of separations. AliM. Amal 1 Microbial Chemistry Dept., Genetic Engineering and Biotechnology Division, National Research Center, Dokki, Cairo, EGYPT KeeraA. Abeer 2 Chemistry of Dyeing, Printing and Auxiliaries Department, Textile Division, National Research Centre, Cairo, EGYPT HelmyM. Samia 3 AbdEl-NasserH. Nadia 4 Ahmed K.A. 5 El-Hennawi H.M. 6 Sharma Pooja 1 Synthetic and Surface Science Laboratory, Department of Chemistry, Govt. College Ajmer (Raj.), INDIA Upadhyay R.K. 2 Chaturvedi Alok 3 RaoBasaw M.V. 1 Department of Chemistry, Krishna University, Machilipatnam Prasanthi V. 2 Department of Chemistry, NIMS University, Rajasthan, India MaitiSushanta G. 3 Raja 4 Misri Gozan 1 Chemical Engineering Department, University of Indonesia, Kampus UI Depok 16424, INDONESIA PraswastiPembangunDyahKencana Wulan 2 MaqbulA. Barote 1 Department of Physics, Azad college, Ausa-413520, Maharashtra, INDIA BabasahebD. Ingale 2 Thin Film Research Laboratory, Department of Physics, Rajarshi Shahu Mahavidyalaya, Latur-413512, Maharashtra, INDIA RangraoV. Suryawanshi 3 Chavan Tanajiv. 4 ElahipashaU. Masumdar 5 Mathur Rahul 1 Chemical Engineering Department, Indian Institute of Technology, Roorkee, Roorkee 247667, INDIA Kumar Anil 2 Uttar Pradesh Pollution Control Board, Agra, INDIA Balomajumder 3 Chandrajit 4 Bhattacharya Tanushree 1 Dept. of Environmental Science and Technology,Institute of Science and Technology for advanced Studies and Research, Chakraborty S. 2 Dept. of Biosciences and Environmental Sciences, N.V.Patel College of Pure and Applied Sciences, Vallabh Vidyanagar, Anand – 388120, Gujarat, INDIA Fadadu Bhumika 3 Dept. of Environmental Sciences,University of Kalyani, Kalyani, Nadia, West Bengal, INDIA Bhattacharya Piyal 4 HusseinSakr Seleem 1 Ain Shams University, Faculty of Education, Department of Chemistry, Roxy, Cairo, EGYPT Mostafa M. 2 Stefan S.L. 3 Abdel-Aziz E. 4 Suantak Kamsonlian 1 Department of Chemical Engineering, Indian Institute of Technology Roorkee, Uttarakhand, INDIA Balomajumder Chandrajit 2 Shri Ch 3 > Research Paper 2011 7 20 2011 August 18 Biosorption has been used for the removal of As (III) ion from aqueous solution using powdered maize leaves biomass in this study. Batch experiments were conducted by varying various process parameters such as pH, contact time and temperature. At optimum treatment conditions (pH 8, contact time of 4 hrs and temperature of 40C) 84.9% As (III) ion was removed from aqueous solution. Langmuir and Freundlich isotherms were used for equilibrium studies. Freundlich isotherm was better fitted with experimental data. For kinetic studies, pseudo second order kinetic model (R =0.997) appeared to be more suitable model to describe As (III) ion biosorption. The positive value of S° and H° depicts the feasibility of the biosorption and the spontaneous nature was confirmed by negative value of . Fourier Transformation infrared spectrometry (FTIR) and Scanning Electron Microscopy (SEM) were used for characterisations of maize leaves biomass. Copyright@ International Science Community Association