Adsorption of Cd²⁺ and Cr³⁺ ions from aqueous solutions by using residue of <i>Padina gymnospora</i> waste as promising low-cost adsorbent.

3.3 RPG weight effect The adsorbent quantity utilized in adsorption was essentially significant as indicated by the sorbent–sorbate equilibrium in the system and the treatment cost of adsorbent per unit of metal solution.

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