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Lead (II) adsorption from aqueous solutions onto modified ag nanoparticles: Modeling and optimization
Author(s) -
Hosseini S.J.,
Aghaie H.,
Ghaedi M.,
Dashtian K.,
Purkait M.K.
Publication year - 2016
Publication title -
environmental progress and sustainable energy
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.495
H-Index - 66
eISSN - 1944-7450
pISSN - 1944-7442
DOI - 10.1002/ep.12289
Subject(s) - trisodium citrate , reagent , aqueous solution , response surface methodology , chemistry , adsorption , central composite design , elution , sodium citrate , silver nitrate , nuclear chemistry , nanoparticle , ion , silver nanoparticle , inorganic chemistry , nitrate , chromatography , materials science , nanotechnology , organic chemistry , medicine , pathology
Silver nanoparticles (Ag‐NPs) were synthesized viz. a green method in the presence of trisodium citrate as reducing agent and L‐cysteine as acceptor and capping agent for removal of Pb 2+ ion. Central composite design (CCD) under response surface methodology (RSM) was applied for simultaneous optimization of the importance variables for synthesis of Ag‐NPs and its applicability for Pb 2+ ion removal. The effects of the variables, such as pH, amount of reagent (such as L‐cysteine concentration) and contact time on the Pb 2+ ion removal and subsequent elution steps were efficiently examined. The maximum of Pb 2+ ion removal was obtained while concentration of sodium citrate, silver nitrate, lead nitrate and L‐cysteine was 0.05 M, 0.005 M, 27.78 mg L −1 and 0.25 M, respectively. The optimized resulting of Ag‐NP were applicable for removal of a large content of Pb 2+ ion (105.4 mg g −1 ) from samples with high Pb 2+ ion concentration in short reasonable time. © 2015 American Institute of Chemical Engineers Environ Prog, 35: 743–749, 2016