Highlights
Removal efficiency of 89.31 % (Pb) and 96.33 % (Ni) by sugarcane bagasse.
Optimum pH 6.0; temperature, 30 °C; contact time, 90 min. and adsorbent dose of 0.5 g.
Fitted by Freundlich and pseudo-second-order models.
Adsorption capacity of 1.61 mg/g (Pb) and 123.46 mg/g (Ni).
Desorption efficiency of 85.2 % by nitric acid.
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