Indian Journal of Innovations and Developments

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A batch adsorption experiment was carried out using marine algae-seaweed (Ascophyllum nodosum) as adsorbent for metal removal at two temperatures (23.5°C and 37°C) and four pH values (2, 5, 7 and 10). Atomic Absorption Spectroscopy (AAS) adsorption results show maximum adsorption capacities of 93.41% for lead at pH 2, 53.13% for cadmium at pH 10 and no adsorption for chromium throughout the pH range and temperature were found to have no significant effect on the adsorption process, especially for cadmium and lead. However, the effect of pH was significant and varied with each metal. These results were found to be comparable to results reported from previous works. The results show that the removal efficiency of each adsorbent is highly dependent on pH, and metal ion removal occurred in the preferential order lead > cadmium > chromium, depicting strong contributions from the ionic radius of each metal ion. These results demonstrate the immense potential of the adsorbent as alternatives for metal removal from industrial effluent treatment.

Keywords

Adsorbent, Adsorption, Trace Metals, Sludge
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