Journal article
Comparative efficiency of peanut shell and peanut shell biochar for removal of arsenic from water
Environmental Science and Pollution Research, Vol.26(18), pp.18624-18635
06/2019
PMID: 31055751
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Abstract
Contamination of surface water and groundwater streams with carcinogenic chemicals such as arsenic (As) has been a major environmental issue worldwide, and requires significant attention to develop new and low-cost sorbents to treat As-polluted water. In the current study, arsenite (As(III)) and arsenate (As(V)) removal efficiency of peanut shell biochar (PSB) was compared with peanut shell (PS) in aqueous solutions. Sorption experiments showed that PSB possessed relatively higher As removal efficiency than PS, with 95% As(III) (at pH 7.2) and 99% As(V) (at pH 6.2) with 0.6 g L−1 sorbent dose, 5 mg L−1 initial As concentration, and 2 h equilibrium time. Experimental data followed a pseudo-second-order model for sorption kinetics showing the dominance of chemical interactions (surface complexation) between As and surface functional groups. The Langmuir model for sorption isotherm indicated that As was sorbed via a monolayer sorption process. The X-ray photoelectron spectroscopy (XPS) and Fourier transform infrared (FTIR) spectroscopy analyses revealed that the hydroxyl (–OH) and aromatic surface functional (C=O, C=C–C, and –C–H) groups contributed significantly in the sorption of both As species from aqueous solutions through surface complexation and/or electrostatic reactions. We demonstrate that the pyrolysis of abandoned PS yields a novel, low-cost, and efficient biochar which provides dual benefits of As-rich water treatment and a value-added sustainable strategy for solid waste disposal.
Details
- Title
- Comparative efficiency of peanut shell and peanut shell biochar for removal of arsenic from water
- Creators
- Muhammad Sohail Sattar - Government College University, FaisalabadMuhammad Bilal Shakoor - Government College University, FaisalabadShafaqat Ali - Government College University, FaisalabadMuhammad Rizwan - Government College University, FaisalabadNabeel Khan Niazi - University of Agriculture FaisalabadAsim Jilani - King Abdulaziz University
- Publication Details
- Environmental Science and Pollution Research, Vol.26(18), pp.18624-18635
- Publisher
- Springer
- Grant note
- 1430/SRGP/R&D/HEC/2016 / Higher Education Commission, Pakistan The study received financial support from the Higher Education Commission (HEC), Pakistan (Project No.1430/SRGP/R&D/HEC/2016) and Government College University Faisalabad, Pakistan.
- Identifiers
- 991012951091502368
- Copyright
- © Springer-Verlag GmbH Germany, part of Springer Nature 2019
- Academic Unit
- School of Environment, Science and Engineering; Faculty of Science and Engineering
- Language
- English
- Resource Type
- Journal article