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Research articles

ScienceAsia 49 (2023):ID 437-444 |doi: 10.2306/scienceasia1513-1874.2023.033

Synthesis and comparison analysis of modified silica adsorbent and bismuth catalyst for removal of bisphenol A

Shanmuga Kittappaa, Shaliza Ibrahimb, Nuruol Syuhadaa Mohda,*

ABSTRACT:     A novel material, Tris coated magnetic nano structured adsorbent (T-MNSA) was synthesized using incipient wetness impregnation method for removal of bisphenol A (BPA). T-MNSA maximum adsorption capacity was 160 mg/g and sorption density was 0.078 mole BPA/mole of Tris. In addition, degradation using ultrasound assisted bismuth ferrite (BF) sono-catalyst was studied for removal and cost efficiency differences. The degradation results show a complete removal of BPA at condition of 0.10 g/l of BF, 100% power, and 72 kHz frequency. The mechanism study reveals that T-MNSA forms biomolecules and covalently attaches to BPA, but BF generates large amount of H2O2 molecules and breaks down BPA to non-toxic CO2 and water. Cost analysis study reveals that T-MNSA is more economical than BF due to lower production and removal cost, almost ten times lower than degradation process using BF, and the material can be commercially produced in bulk quantities.

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a Department of Civil Engineering, Faculty of Engineering, Universiti Malaya, Kuala Lumpur 50603 Malaysia
b Institute of Ocean and Earth Sciences, Universiti Malaya, Kuala Lumpur 50603 Malaysia

* Corresponding author, E-mail: n_syuhadaa@um.edu.my

Received 17 Jun 2022, Accepted 13 Mar 2023