Adsorption Efficiency of UV-Irradiated Polyvinyl AlcoholAlginate Adsorbent Beads for Chromium (VI) Removal

Lau, W.G. and Selimin, M.A. and Lee, T.C. (2025) Adsorption Efficiency of UV-Irradiated Polyvinyl AlcoholAlginate Adsorbent Beads for Chromium (VI) Removal. Journal Of Sustainable Materials Processing And Management, 5 (1). pp. 1-8. ISSN 2821-2843

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Abstract

Due to the risk of chromium (Cr) contamination, industrial waste emissions have become a global concern, necessitating an effective adsorption approach. Polyvinyl alcohol (PVA) - alginate beads are a promising material for overcoming this problem. The present work aims to investigate the effect of ultraviolet (UV) light irradiation on the preparation of PVA-alginate beads throughout a range of UV irradiation durations, as well as its Cr (VI) removal rate. In this work, a homogeneous gel made of PVA and sodium alginate (SA) was produced and then radiated to UVA light for varying periods of time (5-20 minutes). Subsequently, the PVA-alginate adsorbent beads were made by crosslinking with 6% boric acid and 2% calcium chloride. PVAalginate adsorbent beads were fabricated easily after UVA irradiation because the viscosity of gel PVA-alginate was reduced. The Cr (VI) adsorption experiment employed 15 g of PVA-alginate adsorbent beads, 180 minutes of adsorption time, and 50 mg/L Cr (VI) initial concentration. The size analysis revealed that the average diameter of the adsorbent beads after Cr (VI) adsorption was approximately 4.00 mm. The UV-Vis results showed that sample A prepared by exposing the PVA-alginate adsorbent beads to UV light for 5 minutes has an optimum Cr (VI) removal rate of 71.63% after in contact for 180 minutes. This study's findings were critical for establishing a new knowledge of the production of PVA-alginate beads irradiated with UV light and moving forward to mitigate heavy metal pollution in waste water, therefore enhancing the quality of water and the environment.

Item Type:	Article
Uncontrolled Keywords:	Polyvinyl alcohol, sodium alginate, adsorbent beads, hexavalent chromium, UV irradiation
Subjects:	T Technology > TD Environmental technology. Sanitary engineering
Divisions:	Faculty of Technology Management and Business > FPTP
Depositing User:	Mr. Mohamad Zulkhibri Rahmad
Date Deposited:	10 Dec 2025 03:16
Last Modified:	10 Dec 2025 03:17
URI:	http://eprints.uthm.edu.my/id/eprint/13292

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