Application of a new derivatives of traizole Schiff base on chromium recovery from its wastewater

ABSTRACT

Interaction of 3-Amino-1 H–1,2,4-triazole with 4,4“-Dihydroxybenzil yielded 4,4”-((1E)-1,2-bis((1 H–1,2,4-triazol-3-yl)imino)ethane-1,2-diyl)diphenol. The adsorbent (TIHP) was made by subjecting the synthesized Schiff base to a phosphorylation reaction; its structure was validated by FTIR, TGA, ¹HNMR, ¹³CNMR, GC-MS, and Phosphorus-31 nuclear magnetic resonance (³¹P-NMR). Chromium oxyanions (Cr(VI)) in water were successfully removed by using the newly synthesized adsorbent (TIHP). Many different variables, namely; the initial concentration of Cr(VI), the period of interaction, the temperature, the amount of the adsorbent dosage, and the pH of aqueous were tested via the batch technique. Maximum sorption efficiency were obtained at pH 2, 45 min contact time, 0.08 dose, at room temperature. When exposed to the proposed foreign ions, Cr(VI) desorption)‘s behavior modifies. The novel adsorbent had an extreme adsorption capability of 307.07 mg/g for Cr(VI) at ambient temperature. Adsorption isotherms could be explained by Freundlich’s isotherm model. The pseudo-second-order equation provided tight limits on the kinetic outcomes. Thermodynamic analyses confirm that the up taking process was spontaneous and endothermic.

KEYWORDS:

• Chromium
• Schiff base
• triazol derivatives
• tannery wastewater
• adsorption

Acknowledgment

The authors express their appreciation to the Deanship of Scientific Research at King Khalid University, Saudi Arabia, for funding this work through research group program under grant number RGP. 2/167/43.

Novelty Statement

• Triazole Schiff Base Derivatives (4-((1E)-1,2-bis((1 H–1,2,4-triazol-3-yl)imino)-2-(4-((hydroxyhydrophosphoryl)oxy)phenyl)ethyl)phenyl hydrogen phosphonate) (TIHP) was successfully prepared.

• The prepared TIHP was successfully characterized with several tools and confirmed.

• TIHP was utilized for modeling and optimizing adsorption of Chromium.

• The mechanism of adsorption of Chromium was proposed

• Chromium hydroxide was successfully separated from working tannery waste samples.

Disclosure statement

No potential conflict of interest was reported by the author(s).

Correction Statement

This article has been republished with minor changes. These changes do not impact the academic content of the article.

Additional information

Funding

The work was supported by the Deanship of Scientific Research at King Khalid University [RGP. 2/167/43].