Comparison between Ag (I) and Ni (II) removal from synthetic nuclear power plant coolant water by iron oxide nanoparticles

Journal of Environmental Health Science Engineering

Mohsen Askarishahi¹  Mohaddeseh Aboueian -Jahromi¹  Mohammad Hassan Ehrampoush¹  Mohammad Hossein Salmani¹ 

[1] Department of Environmental Health Engineering, Faculty of Public Health, Shahid Sadoughi University of Medical Sciences, Yazd, Iran

关键词: Synthetic coolant;    Removal;    Silver;    Nickel;    Nanoparticles iron oxide;   

Others  :  820577
DOI  :  10.1186/2052-336X-11-21

 received in 2012-07-29, accepted in 2013-06-03,  发布年份 2013

【 摘 要 】

The impact of effective parameters such as iron oxide nanoparticles dosage, contact time and solution pH was optimized for removal of Ag(I) and Ni(II) in the nuclear cooling system and the best conditions were compared. Nearly complete removal (97%) of Ni(II) and Ag(I) were obtained at adsorbent dosage of 40 and 20 g/L, respectively. Experiments showed that 4 hours was a good choice as optimum contact time for two ions removal. The effective parameter was pH, so that maximum removal efficiency was obtained for Ag(I) in acidic pH=3 and for Ni(II) in basic pH=10. It seems that removal of Ag(I) was controlled by adsorption-reduction mechanism, but Ni(II) could place only adsorption. Langmuir and Freundlich model was more suitable for nickel and silver removal by this adsorbent, respectively. Ag(I) and Ni(II) removal efficiency trend by this adsorbent is similar at periods but different in the concentrations, pHs and equilibrium model. The obtained results were very promising, as both Ag(I) and Ni(II) were effectively removed from synthetic wastewater and there was a possibility to remove Ag(I) very fast. Hence, the idea of using nanoparticles for application of metal ions removal from wastewaters seems to be very efficient and quite promising.

【 授权许可】

   
2013 Salmani et al.; licensee BioMed Central Ltd.

【 图 表 】

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