Abstract: |
Tannery industries are one of the extensive industrial activities which are the major source
of chromium contamination in the environment. Chromium contamination has been an increasing
threat to the environment and human health. Therefore, the removal of chromium ions is necessary
to save human society. This study is oriented toward the preparation of a new triazole Schiff base
derivatives for the remediation of chromium ions. 4,4’-((1E)-1,2-bis ((1H-1,2,4-triazol-3-yl)
imino)ethane-1,2-diyl) diphenol was prepared by the interaction between 3-Amino-1H-1,2,4-triazole
and 4,4’-Dihydroxybenzil. Then, the produced Schiff base underwent a phosphorylation reaction
to produce the adsorbent (TIHP), which confirmed its structure via the different tools FTIR,
TGA, 1HNMR, 13CNMR, GC-MS, and Phosphorus-31 nuclear magnetic resonance (31P-NMR). The
newly synthesized adsorbent (TIHP) was used to remove chromium oxyanions (Cr(VI)) from an
aqueous solution. The batch technique was used to test many controlling factors, including the pH
of the working aqueous solution, the amount of adsorbent dose, the initial concentration of Cr(VI),
the interaction time, and the temperature. The desorption behaviour of Cr(VI) changes when it is
exposed to the suggested foreign ions. The maximum adsorption capacity for Cr(VI) adsorption on
the new adsorbent was 307.07 mg/g at room temperature. Freundlich’s isotherm model fits the adsorption
isotherms perfectly. The kinetic results were well-constrained by the pseudo-second-order
equation. The thermodynamic studies establish that the adsorption type was exothermic and naturally
spontaneous.
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