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Open AccessEditor’s ChoiceArticle

Adsorption of Hexavalent Chromium Using Banana Pseudostem Biochar and Its Mechanism

Key Laboratory of Ministry of Education for Advanced Materials in Tropical Island Resources, College of Materials and Chemical Engineering, Hainan University, Haikou 570228, China
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Sustainability 2018, 10(11), 4250; https://doi.org/10.3390/su10114250
Received: 1 October 2018 / Revised: 13 November 2018 / Accepted: 14 November 2018 / Published: 17 November 2018
(This article belongs to the Special Issue Sustainable Wastewater Treatment Systems)
A low-cost biochar was prepared through slow pyrolysis of banana pseudostem biowaste at different temperatures, and characterized by surface area and porosity analysis, scanning electron microscopy (SEM), Fourier-transform infrared (FTIR) spectroscopy, and X-ray photoelectron spectroscopy (XPS). It was shown that the biochar prepared at low pyrolysis temperature was rich in oxygen-containing groups on the surface. Adsorption experiments revealed that the biochar prepared at 300 °C (BB300) was the best adsorbent for Cr(VI) with 125.44 mg/g maximum adsorption capacity at pH 2 and 25 °C. All the adsorption processes were well described by pseudo-second-order and Langmuir models, indicating a monolayer chemiadsorption. Furthermore, it was demonstrated that adsorption of Cr(VI) was mainly attributed to reduction of Cr(VI) to Cr(III) followed by ion exchange and complexation with the biochar. View Full-Text
Keywords: biochar; banana pseudostem; chromium; adsorption mechanism biochar; banana pseudostem; chromium; adsorption mechanism
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MDPI and ACS Style

Xu, S.; Yu, W.; Liu, S.; Xu, C.; Li, J.; Zhang, Y. Adsorption of Hexavalent Chromium Using Banana Pseudostem Biochar and Its Mechanism. Sustainability 2018, 10, 4250. https://doi.org/10.3390/su10114250

AMA Style

Xu S, Yu W, Liu S, Xu C, Li J, Zhang Y. Adsorption of Hexavalent Chromium Using Banana Pseudostem Biochar and Its Mechanism. Sustainability. 2018; 10(11):4250. https://doi.org/10.3390/su10114250

Chicago/Turabian Style

Xu, Shuang; Yu, Weiguang; Liu, Sen; Xu, Congying; Li, Jihui; Zhang, Yucang. 2018. "Adsorption of Hexavalent Chromium Using Banana Pseudostem Biochar and Its Mechanism" Sustainability 10, no. 11: 4250. https://doi.org/10.3390/su10114250

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