Removal of Haloacetic Acid in Swimming Pool by Activated Carbon from Dialium cochinchinensis shell
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Abstract
Chlorination is commonly used for disinfection in swimming pools. However, residues of haloacetic acid (HAAs), classified as carcinogenic, are formed. Therefore, the aim of this research is the removal of HAAs by adsorption on activated carbon from Dialium cochinchinensis shell (DSAC) which were carbonized and activated with ZnCl2 at 450 °C. The DSAC was characterized in terms of morphology (SEM), specific surface area, elemental composition and point of zero charge (pHpzc). Additionally, the initial concentration of synthetic HAAs (25 - 300 Cambria g L-1) and the amount of DSAC (0.1 - 0.6 g) and contact time were investigated. The results indicate that the kinetic of adsorption is best fit by pseudo-second-order model. The Langmuir adsorption isotherm fits well, with a maximum monolayer adsorption value of 312.50 μg g-1. Furthermore, DSAC could remove up to 95.45% of HAAs from swimming pool water, making it an effective alternative adsorbent.
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References
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