human and animals due to their toxicity. Since then, different studies have been explored for
the possibility of utilizing new, low–cost, and sustainable adsorbent materials to get rid of
heavy metals in the wastewater streams and aqueous solutions. This present study aimed to
investigate and compare the adsorption ability of powdered calamansi (Citrofortunella
microcarpa) fruit peels (PCFP) for the elimination of both Al (III) and Cu (II) ions in single …