Removal of Dichloroacetonitrile in Synthetic and Tap Water by Napier grass-derived Adsorbent
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Abstract
The objectives of this study are to investigate the characteristics of Napier grass-derived adsorbent and its efficiency on DCAN removal in synthetic water and tap water. Napier grass is one of the materials that contains a high amount of cellulose content. Thus, it can be utilized as an alternative and potential sustainable resource of raw material to produce biosorbent. Napier grass-derived adsorbent was produced by carbonized at 600 °C under Liquefied Petroleum Gas (LPG) for 1 hour. The characteristics of Napier grass-derived adsorbent were investigated by using the Brunauer Emmett-Teller (BET) method and the surface charges by using Point of Zero Charge (PZC) method. The results showed that BET surface area was 182.53 m2/g, average pore diameter was 2.9579 nm., and PZC was approximately 7 both in synthetic water and tap water. Napier grass-derived adsorbent was proved to provide high efficiency to remove DCAN from water source. The removal efficiency was increased with increasing adsorbent. The optimal dosage of Napier grass-derived adsorbent was 2.0 g/L both in synthetic water and tap water with more than 90% removal efficiency. Adsorption kinetics were conducted, it was found that the adsorption of DCAN by using Napier grass-derived adsorbent was fitted to pseudo-second order which can be indicated that the mechanism of adsorption was chemisorption. The adsorption was reaching equilibrium after 50 minutes both in synthetic water and tap water. In addition, the adsorption isotherm was conducted and found that physical adsorption was the major adsorption mechanism of DCAN in Napier grass-derived adsorbent.
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