ENHANCING PRE-CONCENTRATION OF Pb(II) THROUGH SYNTHESIS OF TANNIN ACID-CHITOSAN (TAC) AS SOLID PHASE EXTRACTION ADSORBENT

This study was conducted to incorporate tannin acid-chitosan (TAC) in solid phase method. The synthesized material was employed as an adsorbent to examine the effectiveness of solid phase extraction for preconcentration of Pb(II) in industrial wastewater. In addition, the parameters affecting extraction optimization were investigated and TAC was performed using a mass ratio of tannin acid and chitosan of 2:1 w/w. TAC absorbent was fully characterized using FTIR to detect functional groups and SEM-EDX to assess morphology and percentage of elements. The use of the optimal parameters for preconcentration on the performance of SPE method was obtained with adsorption, desorption, and enrichment factor at pH 5, a sample flow rate of 5 mL/min, Na2EDTA eluent flow rate of 5 mL/min, a sample volume of 10 mL, Na2EDTA eluent volume of 5 mL, sample concentration of 6 mg L–1 and Na2EDTA concentration of 0.35 M. Furthermore, preconcentration application to Pb(II) wastewater at 0.05 mg L–1, 0.06 mg L–1, and 0.07 mg L–1 were concentrated 0.28 mg L–1, 0.32 mg L–1, and 0.38 mg L–1 with a factor of 5.6, 5.35, and 5.45 times. The result showed that the proposed method was effective for SPE with TAC adsorbent and Pb(II) preconcentration