The performance of jackfruit (Artocarpus heterophyllus) seed adsorbent for ammonia nitro-gen (NH3-N) removal from aqueous solution was examined through batch and continuous bed column experiments. The effects of sodium chloride (NaCl) and lignin concentration on the adsorption process were evaluated. The results revealed that the adsorption performance gradually decreased upon the addi-tion of NaCl and lignin in the solution. Fixed bed column experiments showed that the maximum re-moval of ammonia nitrogen was obtained at an influent concentration of 100 mg/L, bed height of 10 cm and lowest inlet flow rate of 17 mL/min. Meanwhile, desorption studies were carried out at different pH and highest desorption capacity of jackfruit seed adsorbent was 0.42 mg/g. This study suggests that jackfruit seed is a promising adsorbent for the recovery process of ammonia nitrogen.
Keywords: Ammonia-nitrogen, Jackfruit seeds, Adsorption, Fixed-bed
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