Background: Ammonia nitrogen at high concentration poses several threats to the
human and environment such as odor and eutrophication. Although many techniques have
been studied for ammonia nitrogen removal, utilization of fruit wastes as natural adsorbent
could offer some advantages such as low cost and spent adsorbent can be used as fertilizer.
Aim: The performance of jackfruit (Artocarpus heterophyllus) seed adsorbent for ammonia
nitrogen (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.
Results And Discussion: The results revealed that the adsorption performance gradually decreased
upon the addition of NaCl and lignin in the solution. Fixed bed column experiments
showed that maximum removal 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.
Conclusion: This study suggests that jackfruit seed is a promising adsorbent for the recovery
process of ammonia nitrogen.