Adsorption of Methylene Blue and Pb by using acid-activated Posidonia oceanica waste.

Dead leaves of seagrass Posidonia oceanica were activated by using one mol L acetic acid and used as an eco-adsorbent for the removal of methylene blue (MB) and Pb from aqueous solutions. The seagrass was characterized by chemical and physical measurements that confirmed the acid-activation of seagrass. The favourable conditions for MB and Pb adsorption onto the activated seagrass (SG) were determined to be a pH range of 2-12 and ≥6, an adsorbent dosage of 3.