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Competitive Removal of Ammonium-Nitrogen from Aqueous Solutions by Mineral and Organic Adsorbents

ABSTRACT Sorption potentials of mineral and organic materials for ammonium nitrogen () removal from aqueous solution were investigated. Batch adsorption studies were performed as a function of pH, contact time, and adsorbent dosage. Isotherm experiments were carried out by concentrations of ranged from 0 to 1000 mg . The adsorption equilibrium was described well by the Langmuir and Freundlich isotherm models. The maximum adsorption capacities of decrease in this order: Zeolite> Bentonite> Canola residue> Municipal waste compost > Mushroom compost > Calcite > Kaolinite> Wheat bran. The energy of adsorption in mineral adsorbent ranged from 0.0014 L/mg (Kaolinite) to 0.0105 L/mg (Zeolite), while it was ranged from 0.0016 L/mg (Municipal waste compost) to 0.0033 L/mg (Wheat bran) in organic adsorbents. Our finding showed that organic adsorbents can be used as a novel and low-cost absorbents to remove from wastewater.