caa a22 4500 463170636 CHVBK 20180406164812.0 cr unu---uuuuu 170326e20070401xx s 000 0 eng 10.1007/s10450-007-9009-5 doi (NATIONALLICENCE)springer-10.1007/s10450-007-9009-5 Development and optimization of magnetic technologies based processes for removal of some toxic heavy metals [Elektronische Daten] [E. Borai, E. El-Sofany, T. Morcos] In the developing countries where the cost is often adecisive factor, extensive studies were undertaken to test the most effective factors on the preparation, optimization and validation of the magnetic particles (or, more accurately, magnetizable particles) for removal of heavy metals from wastewaters. The objective of the proposed work was focused to provide promising solid-phase materials, which, are relatively in expensive and combine high surface capacity with fast efficient treatment. Four various metal oxides including hydrous ferric oxide(HFO), hydrous stannic oxide (HSO) and mixed ferric/stannic oxide (HMO), were prepared by precipitation with ammonia from metal chloride solutions. Two mixed oxides were prepared with different Sn/Fe ratios of 50% and 20%. Optimal conditions for the activation of these particles and the subsequent mixing of various metals oxides are tested together with the utility of the method to get anew composite material with developed chemical characteristics over their individual metal oxides. Factors affecting the sorption behavior of the prepared samples in basic and acid media were elucidated. The magnetic treatment procedure using the mixed oxide (50%) enables the equilibration step to be carried out rapidly mainly due to ferric oxide during the magnetization process and efficiently due to high capacity of the stannic oxide. A key factor in achieving very high uptake percentage is the reduction of non-specific binding of various heavy metals to the solid phase support. This is usually achieved by increasing the ion exchange capability, in addition to their adsorption process. Springer Science+Business Media, LLC, 2007 Heavy metals nationallicence Magnetic technology nationallicence Composite oxide nationallicence Borai E. Hot Labs. Centre, Atomic Energy Authority, P.O. Code 13759, Cairo, Egypt aut El-Sofany E. Hot Labs. Centre, Atomic Energy Authority, P.O. Code 13759, Cairo, Egypt aut Morcos T. Hot Labs. Centre, Atomic Energy Authority, P.O. Code 13759, Cairo, Egypt aut Adsorption Springer US; http://www.springer-ny.com 13/2(2007-04-01), 95-104 0929-5607 13:2<95 2007 13 10450 https://doi.org/10.1007/s10450-007-9009-5 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1007/s10450-007-9009-5 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Borai E. Hot Labs. Centre, Atomic Energy Authority, P.O. Code 13759, Cairo, Egypt aut NATIONALLICENCE 700 1- El-Sofany E. Hot Labs. Centre, Atomic Energy Authority, P.O. Code 13759, Cairo, Egypt aut NATIONALLICENCE 700 1- Morcos T. Hot Labs. Centre, Atomic Energy Authority, P.O. Code 13759, Cairo, Egypt aut NATIONALLICENCE 773 0- Adsorption Springer US; http://www.springer-ny.com 13/2(2007-04-01), 95-104 0929-5607 13:2<95 2007 13 10450 Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer