Synthesis, characterization and application of novel MnO and CuO impregnated biochar composites to sequester arsenic (As) from water: Modeling, thermodynamics and reusability
Document Type
Article
Source of Publication
Journal of Hazardous Materials
Publication Date
1-5-2021
Abstract
© 2020 Elsevier B.V. The present study aimed at enhancing the adsorption potential of novel nanocomposites of Sesbania bispinosa biochar (SBC) with copper oxide (SBC/CuO) and manganese oxide nanoparticles (SBC/MnO) for the efficient and inexpensive removal of environmentally concerned contaminant arsenic (As) from contaminated water at batch scale. The scanning electron microscopy (SEM), Fourier transform infrared (FTIR) spectroscopy, energy dispersive X-ray (EDX), X-ray diffraction (XRD) and point of zero charge (PZC) analyses proved successful impregnation of the metallic nanoparticles on SBC surface. The results revealed the maximum As removal (96 %) and adsorption (12.47 mg/g) by SBC/CuO composite at 10 mg As/L, optimum pH-4, dose 1.0 g/L and ambient temperature (25 ± 1.5 °C) as compared with SBC (7.33 mg/g) and SBC/MnO (7.34 mg/g). Among four types of adsorption isotherms, Freundlich isotherm demonstrated best fit with R2 > 0.997. While pseudo second-order kinetic model revealed better agreement with kinetic experimental data as matched with other kinetic models. The thermodynamic results depicted that As adsorption on the as-synthesized adsorbents was endothermic and spontaneous in nature with increased randomness. The SBC/CuO displayed excellent reusability and stability over four adsorption/desorption cycles and proved that the as-synthesized SBC/CuO composite may be the efficient adsorbent for practical removal of As from contaminated water.
DOI Link
ISSN
Publisher
Elsevier B.V.
Volume
401
First Page
123338
Disciplines
Life Sciences
Keywords
Adsorption, Biochar, Mechanism, Nanocomposite, SBC/CuO, Thermodynamics
Scopus ID
Recommended Citation
Imran, Muhammad; Iqbal, Muhammad Mohsin; Iqbal, Jibran; Shah, Noor Samad; Khan, Zia Ul Haq; Murtaza, Behzad; Amjad, Muhammad; Ali, Shafaqat; and Rizwan, Muhammad, "Synthesis, characterization and application of novel MnO and CuO impregnated biochar composites to sequester arsenic (As) from water: Modeling, thermodynamics and reusability" (2021). All Works. 3277.
https://zuscholars.zu.ac.ae/works/3277
Indexed in Scopus
yes
Open Access
no