Adsorption of metals from oil sands process water (OSPW) under natural pH by sludge-based Biochar/Chitosan composite

Song, Junying; Messele, Selamawit Ashagre; Meng, Lei; Huang, Zhian; El-Din, Mohamed Gamal

doi:10.1016/j.watres.2021.116930

Cited by 117 publications

(33 citation statements)

References 56 publications

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“…Biochar is a low-cost carbonaceous material produced from the pyrolysis of biomass wastes, with high porosity and abundant surface functional groups (Altaf et al 2021b;Wu et al 2021). Biochar has been proven as an excellent adsorbent for the removal of toxic organic compounds (Huang et al 2018a, b;Qin et al 2018;Nie et al 2021), and trace metal(loid)s such as Cd (Chen et al 2021;Yin et al 2021), Cr (Wei et al 2019a;Xu et al 2020), Pb (Wen et al 2021;Yang et al 2021), Hg (Altaf et al 2021a, b;Liu et al 2022), As (Pan et al 2021;Yang et al 2022), and Sb (Wan et al 2020;Song et al 2021;Zhu et al 2021). Biochar can adsorb metal(loid) ions through multiple mechanisms such as pore filling, ion exchange, precipitation, and surface complexation with functional groups (Hu et al 2020;Bolan et al 2022a).…”

Section: Insights Into Simultaneous Adsorption and Oxidation Of Antim...mentioning

confidence: 99%

Insights into simultaneous adsorption and oxidation of antimonite [Sb(III)] by crawfish shell-derived biochar: spectroscopic investigation and theoretical calculations

Chen

Gao

et al. 2022

Biochar

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Removal of antimonite [Sb(III)] from the aquatic environment and reducing its biotoxicity is urgently needed to safeguard environmental and human health. Herein, crawfish shell-derived biochars (CSB), pyrolyzed at 350, 500, and 650°C, were used to remediate Sb(III) in aqueous solutions. The adsorption data best fitted to the pseudo-second-order kinetic and Langmuir isotherm models. Biochar produced at 350°C (CSB350) showed the highest adsorption capacity (27.7 mg g− 1), and the maximum 78% oxidative conversion of Sb(III) to Sb(V). The adsorption results complemented with infrared (FTIR), X-ray photoelectron (XPS), and near-edge X-ray absorption fine structure (NEXAFS) spectroscopy analyses indicated that the adsorption of Sb(III) on CSB involved electrostatic interaction, surface complexation with oxygen-containing functional groups (C = O, O = C–O), π–π coordination with aromatic C = C and C–H groups, and H-bonding with –OH group. Density functional theory calculations verified that surface complexation was the most dominant adsorption mechanism, whilst π–π coordination and H-bonding played a secondary role. Furthermore, electron spin resonance (ESR) and mediated electrochemical reduction/oxidation (MER/MEO) analyses confirmed that Sb(III) oxidation at the biochar surface was governed by persistent free radicals (PFRs) (•O2− and •OH) and the electron donating/accepting capacity (EDC/EAC) of biochar. The abundance of preferable surface functional groups, high concentration of PFRs, and high EDC conferred CSB350 the property of an optimal adsorbent/oxidant for Sb(III) removal from water. The encouraging results of this study call for future trials to apply suitable biochar for removing Sb(III) from wastewater at pilot scale and optimize the process. Graphical abstract

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Section: Insights Into Simultaneous Adsorption and Oxidation Of Antim...mentioning

confidence: 99%

Insights into simultaneous adsorption and oxidation of antimonite [Sb(III)] by crawfish shell-derived biochar: spectroscopic investigation and theoretical calculations

Chen

Gao

et al. 2022

Biochar

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“…4. The strongest and sharpest peak from the products indicated the element of O, suggesting the enrichment of oxygen-containing groups (Song et al 2021). Moreover, there was obvious characteristic peak of oxygen (O-Auger) at 979.7 eV in Fig.…”

Section: Xpsmentioning

confidence: 99%

Pyrolysis of municipal sludge without gas protection and its adsorption performance toward tetracycline: Effect of pyrolysis temperature and KOH activation

Chen

et al. 2022

Preprint

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Large amount of municipal sludge is difficulty to handle, its resource utilization is an effective measure. In this study, the municipal sludge from sewage treatment plant was pyrolyzed without nitrogen protection at different temperatures and KOH concentrations for activation. The pyrolysis products with higher surface aera and enriched pore structures could be obtained at the pyrolysis temperature of 500 ℃, and KOH activation could further increase the surface aera of the products. The maximum specific surface area was 44.71 m2/g, which was obtained under 2 mol/L KOH activation before pyrolysis at 500 ℃. And in this situation, the obtained pyrolysis products showed the maximum adsorption capacity of 50.75 mg/g toward tetracycline (TC). Moreover, the TC adsorption onto various pyrolysis products followed the pseudo-second-order kinetic model. Adsorption thermodynamics analysis suggested the TC adsorption onto products obtained at pyrolysis temperature of 500 ℃ was mainly the multi-molecule heterogeneous adsorption, while the TC adsorption onto pyrolysis product pretreated through the activation of KOH followed the monomer adsorption mechanism. This different adsorption mechanism was largely related to the pore structure, polarity, and aromaticity etc. of the adsorbent.

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“…2A, the amorphous nature of chitosan was reected in the XRD patterns, and chitosan characteristic peaks were also observed at 2q ¼ 12.12 , 19.55 , and 23.45 in both chitosan and Chi_IL diffraction. 22 In the Chi_IL diffraction pattern, the characteristic peaks of chitosan shied slightly to 19.37 . Chi_IL also showed a lower intensity in the chitosan characteristic peaks than that of chitosan, which indicates a decrease in crystallinity due to the interaction between P 8,8,8,12 Cl and chitosan.…”

Section: Physicochemical Characterization Of the Adsorbentmentioning

confidence: 99%

Facile fabrication of a phosphonium-based ionic liquid impregnated chitosan adsorbent for the recovery of hexavalent chromium

et al. 2022

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Adsorption of metals from oil sands process water (OSPW) under natural pH by sludge-based Biochar/Chitosan composite

Cited by 117 publications

References 56 publications

Insights into simultaneous adsorption and oxidation of antimonite [Sb(III)] by crawfish shell-derived biochar: spectroscopic investigation and theoretical calculations

Insights into simultaneous adsorption and oxidation of antimonite [Sb(III)] by crawfish shell-derived biochar: spectroscopic investigation and theoretical calculations

Pyrolysis of municipal sludge without gas protection and its adsorption performance toward tetracycline: Effect of pyrolysis temperature and KOH activation

Facile fabrication of a phosphonium-based ionic liquid impregnated chitosan adsorbent for the recovery of hexavalent chromium

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