Abstract
Fabrication of adsorbent materials has been done by mixing peat and coal slag, the ratio of 70:30 by weight. The obtained material has a specific surface area S of 10.45 m2/g, rough surface morphology with many functional groups, with high adsorption capacity. The time to reach adsorption equilibrium is 120 minutes, COD adsorption capacity of 15.54 mg/g, N-NH4 adsorption capacity of 10.72 mg/g. The kinetic law of N-NH4 adsorption obeys the apparent second order type 2 equation. The N-NH4 adsorption isotherm obeys both Langmuir and Freundlich equations. The materials are used to adsorb substances in catfish pond wastewater with the criteria of BOD5, COD, N-NO3, N-NH4, total phosphorus, and treatment efficiency from 24.95 to 88.81%.
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