Gamma irradiation-induced Cd2+ and Pb2+ removal from different kinds of water |
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| Institution: | 1. College of Environmental Science & Engineering, Nanjing University of Information Science & Technology, Nanjing 210044, PR China;2. State Key Laboratory of Pollution Control and Resource Reuse, School of Environment, Nanjing University, Nanjing 210093, PR China;1. Department of Physiology and Biophysics, Baqiyatallah University of Medical Sciences, P.O. Box 19395-6558, Tehran, Iran;2. Neuroscience Research Center, Baqiyatallah University of Medical Sciences, P.O. Box 19395-6558, Tehran, Iran;1. Institute for Theoretical Chemistry, University of Texas at Austin, Austin, TX 78712, USA;2. Department of Chemistry, Yazd Branch, Islamic Azad University, Yazd, Iran;3. Institute of Chemistry, Academy of Sciences of Moldova, Chisinau, Republic of Moldova;1. College of Pharmacy, University of Nebraska Medical Center, 986125 Nebraska Medical Center, Omaha, NE 68198-6125, United States;2. Department of Pathology and Microbiology, University of Nebraska Medical Center, 986495 Nebraska Medical Center, Omaha, NE 68198-6495, United States |
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| Abstract: | Gamma irradiation-induced removal of cadmium ion (Cd2+) and lead ion (Pb2+) in different kinds of water was investigated. It is observed that solution pH, dissolved oxygen (DO) concentration, sodium carbonate and EDTA played an important effect on Cd2+ and Pb2+ removal. Low solution pH, low DO concentration and sodium carbonate were favorable for removal of Cd2+ and Pb2+ by reducing species, while the presence of EDTA in solution restrained Cd2+ and Pb2+ reduction. Pb2+ removal percentage was higher compared to that of Cd2+ at the same experimental conditions. Cd2+ and Pb2+ removal under different conditions was well described by the pseudo-first-order kinetics model. Cd2+ and Pb2+ removal in different water followed an increasing order: water inflow<surface water<effluent<ground water. In addition, gamma irradiation resulted in a slight decrease in pH and TOC values of water inflow of municipal sewage treatment plant. |
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