- Thesis topic: Removal of Isoniazid from Aqueous Solution through Activated Carbon from Different Raw Materials

- Doi: https://doi.org/10.6840/cycu201900022

- Abstract:

       Several studies have demonstrated the presence of pollutants from the pharmaceutical industry in surface and groundwater. Isoniazid as one of the most toxic pharmaceutical pollutant in water body needs further study to reduce its environmental impacts, one of the methods is by adsorption. Activated carbon was synthesized from golden shower and soybean milk residue, agricultural wastes can be employed as potential low-cost precursors for AC production. This paper presents a recent advancement in the utilization of soybean milk residues and golden shower as the precursor of the AC production. In this study, three kinds of ACs were tested (SAC, GAC and CAC). Hydrothermal and pyrolysis process was employed to get activated carbon in sequence. Raw materials were impregnated with K2CO3 were directly pyrolyzed. Isotherm adsorption studies were performed using batch experimental approach and then modeled with Langmuir, Freundlich, and Dubinin-Raduskevich isotherm models. Adsorption of isoniazid using different produced ACs, and commercial AC as a comparison, are all following the Freundlich isotherm model. A possible mechanism that occurs on AC are dipole-dipole and Yoshida H bonding interactions, π-π interaction and n-π interaction. The maximum adsorption capacities determined from DR model (QDR) exhibited the following order GAC(1.25) (249.86 mg/g)>SAC(1.75) (151.35 mg/g)>CAC (133.88 mg/g). 

Keywords: Adsorption, Activated carbon, Isoniazid, Soybean, Golden Shower