Adsorption of Cd(II) from aqueous solution by Pennisetum sp. straw biochars derived from different modification methods

The adsorption mechanism of Cd (II) was investigated by Pennisetum sp . straw biochars (JBC) that were modified by two different methods: KMnO 4 impregnation (JMB1) and H 2 O 2 impregnation (JMB2). A scanning electron microscope and energy-dispersive spectroscopy (SEM-EDS), X-ray diffraction (XRD),...

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Bibliographic Details
Published in:Environmental science and pollution research international 2019-03, Vol.26 (7), p.7024-7032
Main Authors: Yin, Guangcai, Bi, Lulin, Song, Xiaowang, Luo, Haoyu, Ji, Pengpeng, Lin, Qintie, Liu, Qianjun, Tang, Guiyou
Format: Article
Language:English
Subjects:
Adsorption
Aquatic Pollution
Aqueous solutions
Atmospheric Protection/Air Quality Control/Air Pollution
Charcoal
Earth and Environmental Science
Ecotoxicology
Electron microscopes
Environment
Environmental Chemistry
Environmental Health
Environmental science
Fourier transforms
FTIR spectrometers
Hydrogen peroxide
Impregnation
Infrared analysis
Pennisetum
Photoelectron spectroscopy
Photoelectrons
Potassium permanganate
Research Article
Scanning electron microscopy
Spectroscopy
Spectrum analysis
Straw
Waste Water Technology
Water Management
Water Pollution Control
X ray photoelectron spectroscopy
X-ray diffraction
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Summary:The adsorption mechanism of Cd (II) was investigated by Pennisetum sp . straw biochars (JBC) that were modified by two different methods: KMnO 4 impregnation (JMB1) and H 2 O 2 impregnation (JMB2). A scanning electron microscope and energy-dispersive spectroscopy (SEM-EDS), X-ray diffraction (XRD), a Fourier transform infrared spectrometer (FTIR), and a Brunauer-Emmett-Teller (BET) specific surface area analysis were employed to examine the physicochemical characteristics of biochars. The Cd(II) adsorption kinetic fit, the Langmuir model well, and the maximum adsorption capacity occurred in the following order: JMB1 (90.32 mg/g) > JMB2 (45.18 mg/g) > JBC (41.79 mg/g), suggesting that JMB1 had an excellent adsorption performance. Finally, X-ray photoelectron spectroscopy (XPS) was used to explore the main adsorption mechanism. Our results showed that JMB1 was an excellent adsorbent in removing Cd(II) from aqueous solution.
ISSN:0944-1344
1614-7499
DOI:10.1007/s11356-019-04158-6