Biosorption of Chromium (II) Ion from Textile Effluent Using Watermelon Shell-Activated Carbon

Emmanuel Chukwu Okam, Godfrey Ifeanyi Odo, Chinweikpe Kalu Uduma, Gift Uzunma Ijioma, Bernard I. Okolo

Abstract

Watermelon Shell, an agricultural waste, was employed for the adsorptive removal of chromium (II) ion Cr2+ from textile effluent. This study analysed the adsorbent's active sites and morphological structures using FT-IR, SEM, XRD, and XRF. The independent variables' effect, contact time, adsorbent dosage, and pH were predicted using Response Surface Methodology (RSM) for chromium adsorption onto Watermelon Shell Activated Carbon (WSAC). The experimental results indicated that NaOH activation effectively improved WSAC's adsorption capacity. The maximum adsorption capacity was 54.53 %, with an adsorbent dosage of 0.6 g/l, pH of 6.0, and agitation time of 40 min. The high correlation coefficient (R2=0.978) between the model and the experimental data showed that the model predicted the removal of Cr2+ from textile effluent using Watermelon Shell Activated Carbon efficiently.



Keywords


Activated Carbon; Chromium Adsorption; Heavy Metals; Adsorption; Watermelon Shell; Textile Effluent; Carbonization

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Copyright (c) 2022 Emmanuel Chukwu Okam, Godfrey Ifeanyi Odo, Chinweikpe Kalu Uduma, Gift Uzunma Ijioma, Bernard I. Okolo

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