A STUDYING SYNTHESIS OF A CHELATE-FORMING SORBENT BASED ON UREA-FORMALDEHYDE AND DIPHENYLCARBAZONE

STUDYING SYNTHESIS OF A CHELATE-FORMING SORBENT BASED ON UREA-FORMALDEHYDE AND DIPHENYLCARBAZONE

Abstract

In this research work, the synthesis of a new type of chelating sorbent based on the cross-polycondensation reaction of urea, and formaldehyde with diphenylcarbazone in an alkaline medium and the study of its various properties were studied. When the effect of temperature on the synthesis of this new chelating sorbent was studied, the optimal temperature was 90 °C, the duration of time was 1.5-2 hours, and the mole ratio of the starting materials was respectively: urea, formaldehyde (2:5) and diphenylcarbazone It was obtained in 0.1:0.2 0.3 mol ratios. The static exchange capacity of the chelating sorbent was 4.3 mg/eq for 0.1 N NaOH solution. In addition, the sorption levels of ions such as Cu(II), Zn(II), and Ni(II) were also determined. The influence of the environment on the sorption process of this synthesized chelating sorbent with Cu(II) ions was observed. capacity is found to be high. The structure of the newly synthesized sorbent and the sorption of Zn (II) and Cu (II) ions in the solution with the help of the sorbent were studied, and the formation of complex compounds in the sorbent phase was based on the change of vibration frequencies according to the results of IR-spectrum analysis. proposed structure. The IR results confirmed that this sorbent contains OH groups, primary amides (attached melamine ring), and R-O-H group. The surface morphology of this sorbent was studied by SEM analysis. The Langmuir and Freundlich isotherms of the sorption process of the chelating sorbent for Cu (II) ions were studied and analyzed. The obtained results also confirmed that the possibility of using KF-DK as a sorbent for the sorption of d-metals from metallurgical wastewater was highlighted.