Abstract
The present of nitrogen compounds in the form of ammonium (NH4 +) can contribute to serious pollution problems in surface water and groundwater. Among the most competitive ways, the physical removal method using low-cost biosorbent is considered an effective technique. However, compared to heavy metals and organic, less effort has been dedicated to exploring the potential ability of biochar as a biosorbent for ammonium removal. This study was focused on investigating the adsorption capacity of biochar from exhausted coffee husk (ECH) on ammonium in the aqueous solution. The biochar was produced at the different carbonization temperature (400 – 700 °C) and carbonization time (1-4h). The results showed that carbonization temperature of 700 °C during 1h of carbonization time was resulted in the highest adsorption capacity which was 1,13 mg/g of NH4 +. Several characterizations were conducted for observing surface morphological and pores area with scanning electron microscope (SEM) and Brunauer Emmert Teller (BET), respectively. The results showed that the pores were developed with the increasing temperature and resulted in higher absorbance.
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