ABSTRACT

The present study deals with, two adsorbents were compared for extractive capacity of Pb (II), Cd (II) and Zn (II) from contaminated water. The first adsorbent silver nanoparticles were prepared by using the chemical reduction method and second adsorbent silver nanoparticles modified with Schiff base was prepared in two steps. First, Schiff base was prepared by condensation of 2-hydroxy-1-napthaldehde with 4-amino-antipyrine and next silver nanoparticle modified with a Schiff base by suitable method using above prepared silver nanoparticles and Schiff base. The synthesized adsorbents were characterized by elemental analysis, UV-VIS, FTIR, and SEM analysis. Peanut shells were used as a solid phase for remediation of metal ions by column method. Several parameters were examined such as initial metal ion concentration, pH, contact time and adsorbent weight. The maximum adsorption capacity for Pb (II) = 161.29, Cd (II) = 64.10 and Zn (II) = 384.61 respectively, for AgNPs@SB and Pb (II) = 64.10, Cd (II) = 61.34 and Zn (II) = 99 respectively, for silver nanoparticles. Comparing both adsorbents, obtained results indicate that second adsorbent silver nanoparticles modified Schiff base is more efficient than first adsorbent unmodified silver nanoparticles. The examined data showed that removal of each metal ions follows Langmuir adsorption isotherm on both adsorbents. Keywords: Extractive capacity, Schiff base, Silver nanoparticles, Adsorbent
Publication date: 01/10/2020

https://ijbpas.com/pdf/2020/October/MS_IJBPAS_2020_5285.pdf

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https://doi.org/10.31032/IJBPAS/2020/9.10.5285