A Study of Zinc Ion Adsorption Efficiency Using Banana Peel Tannins Immobilized on Broussonetia papyrifera (L.) Vent Pulp

Punyanuch  Thammaacheep; Anchana  Preechaworapan; Padarat  Ninjiaranai; Kulwadee  Pinwatana; Chanikan  Junmatong; Rapiphun Janmanee

Punyanuch Thammaacheep Pibulsongkram Rajabhat University
Anchana Preechaworapan Pibulsongkram Rajabhat University
Padarat Ninjiaranai Pibulsongkram Rajabhat University
Kulwadee Pinwatana Pibulsongkram Rajabhat University
Chanikan Junmatong Pibulsongkram Rajabhat University
Rapiphun Janmanee Pibulsongkram Rajabhat University

Keywords: adsorbent, tannin, zinc ion, banana peel, Broussonetia papyrifera (L.) Vent pulp

Abstract

The aim of this study is to investigate the adsorption capacity of zinc ions using a tannin-based adsorbent. Tannin was extracted from fresh banana peels and subsequently immobilized on Broussonetia papyrifera (L.) Vent pulp. The adsorption capacity of the adsorbent for zinc ions was determined using Atomic Absorption Spectroscopy (AAS). Results showed that an adsorbent weight of 1.50 g and a contact time of 90 minutes yielded the highest zinc ion adsorption percentage at 95.37 %. The prepared adsorbent demonstrated the ability to adsorb zinc ions in the concentration range of 1-10 ppm, with adsorption capacities ranging from 0.08 to 0.86 mg/g. The adsorption isotherm for zinc ion removal was described by the Freundlich model, with experimental data yielding values for K, n, and R² of 0.47, 0.85, and 0.99, respectively. Therefore, it can be concluded that the tannin-immobilized Broussonetia papyrifera (L.) Vent pulp adsorbent is effective in removing heavy metals and holds promise for developing applications in wastewater treatment.