Column-Based Removal of High Concentration Microplastics in Synthetic Wastewater Using Granular Activated Carbon

Napi, Nik Nor Amirah Mohd and Ibrahim, Naimah and Hanif, Muhammad Adli and Hasan, Masitah and Dahalan, Farrah Aini and Syafiuddin, Achmad and Boopathy, Raj (2023) Column-Based Removal of High Concentration Microplastics in Synthetic Wastewater Using Granular Activated Carbon. Bioengineered, 14 (1). pp. 1-11. ISSN 2165-5979

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Abstract

Microplastic (MP) is an emerging contaminant of concern due to its abundance in the environment. Wastewater treatment plant (WWTP) can be considered as one of the main sources of microplastics in freshwater due to its inefficiency in the complete removal of small MPs. In this study, a column-based MP removal which could serve as a tertiary treatment in WWTPs is evaluated using granular activated carbon (GAC) as adsorbent/filter media, eliminating clogging problems commonly caused by powder form activated carbon (PAC). The GAC is characterized via N2 adsorption–desorption isotherm, field emission scanning electron microscopy, and contact angle measurement to determine the influence of its properties on MP removal efficiency. MPs (40–48 μm) removal up to 95.5% was observed with 0.2 g/L MP, which is the lowest concentration tested in this work, but still higher than commonly used MP concentration in other studies. The performance is reduced with further increase in MP concentration (up to 1.0 g/L), but increasing the GAC bed length from 7.5 to 17.5 cm could lead to better removal efficiencies. MP particles are immobilized by the GAC predominantly by filtration process by being entangled with small GAC particles/chips or stuck between the GAC particles. MPs are insignificantly removed by adsorption process through entrapment in GAC porous structure or attachment onto the GAC surface.

Item Type:	Article
Uncontrolled Keywords:	Plastic waste; microplastics; column-based removal; granular activated carbon; adsorption
Subjects:	T Technology > TD Environmental technology. Sanitary engineering
Divisions:	Faculty of Health > Program Study of Public Health
Depositing User:	Mr. . Bagas
Date Deposited:	05 Mar 2024 08:56
Last Modified:	05 Mar 2024 08:56
URI:	http://repository.unusa.ac.id/id/eprint/10731

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