Manganese oxide-modified biochar: production, characterization and applications for the removal of pollutants from aqueous environments - A review

2021 ◽  
pp. 126581
Author(s):  
Sabry M. Shaheen ◽  
Natasha ◽  
Ahmed Mosa ◽  
Ali El-Naggar ◽  
Md Faysal Hossain ◽  
...  
Keyword(s):  
Manganese Oxide ◽  
Modified Biochar ◽  
Aqueous Environments

scholarly journals Adsorption of As(V) by the Novel and Efficient Adsorbent Cerium-Manganese Modified Biochar

Water ◽  
2020 ◽  
Vol 12 (10) ◽  
pp. 2720
Author(s):  
Ting Liang ◽  
Lianfang Li ◽  
Changxiong Zhu ◽  
Xue Liu ◽  
Hongna Li ◽  
...  
Keyword(s):  
Manganese Oxide ◽  
Photoelectron Spectroscopy ◽  
Water Environment ◽  
Polluted Water ◽  
X Ray ◽  
Modified Biochar ◽  
Wide Ph Range ◽  
Infrared Spectrometer ◽  
Pseudo Second Order ◽  
Ph Range

Arsenic has become a global concern in water environment, and it is essential to develop efficient remediation methods. In this study, a novel adsorbent by loading cerium and manganese oxide onto wheat straw-modified biochar (MBC) was manufactured successfully aiming to remove arsenic from polluted water. Through scanning electron microscopy and energy-dispersive spectroscopy (SEM-EDS), X-ray diffractometer (XRD), X-ray photoelectron spectroscopy (XPS), Fourier transform infrared spectrometer (FT-IR), and other techniques, it was found the loading of cerium and manganese oxide on MBC played a significant role in As(V) adsorption. The results of the batch test showed that the adsorption of MBC followed the pseudo-second order kinetics and Langmuir equation. The adsorption capacity of MBC was 108.88 mg As(V)/g at pH = 5.0 (C0 = 100 mg/L, dosage = 0.5 g/L, T = 298 K) with considerable improvement compared to the original biochar. Moreover, MBC exhibited excellent performance over a wide pH range (2.0~11.0). Thermodynamics of the sorption reaction showed that the entropy (ΔS), changes of enthalpy (ΔH) and Gibbs free energy (ΔG), respectively, were 85.88 J/(moL·K), 22.54 kJ/mol and −1.33 to −5.20 kJ/mol at T = 278~323 K. During the adsorption, the formation of multiple complexes under the influence of its abundant surface M-OH (M represents the Ce/Mn) groups involving multiple mechanisms that included electrostatic interaction forces, surface adsorption, redox reaction, and surface complexation. This study indicated that MBC is a promising adsorbent to remove As(V) from polluted water and has great potential in remediating of arsenic contaminated environment.

Removal of Trace Mercury in Water by Iron Manganese Oxide Modified Biochar

2021 ◽  
Vol 15 (5) ◽  
pp. 629-638
Author(s):  
Sheng Liu ◽  
Xujie Li ◽  
Zilin Su ◽  
Linya Yi ◽  
Zhanli Chen ◽  
...  
Keyword(s):  
Activated Carbon ◽  
Kinetic Model ◽  
Manganese Oxide ◽  
Low Cost ◽  
Maximum Adsorption Capacity ◽  
Order Kinetic ◽  
Process Technology ◽  
Modified Activated Carbon ◽  
Modified Biochar ◽  
Iron Manganese

Mercury wastewater is a kind of heavy metal wastewater discharged from many industrial processes. The treatment of a large amount of mercury-containing wastewater increasingly requires high-efficiency, low-cost, and low-cost treatment materials, treatment processes and technologies to ensure compliance with mercury standards. This paper mainly studies the effect of iron-manganese oxide modified biochar on the removal of trace mercury in water. The prepared activated carbon is added to a mercury solution with a proper concentration, and a single factor adsorption experiment of pH, initial concentration, amount of activated carbon, particle size, temperature, and time is performed. In this paper, iron manganese oxide modified biochar is listed as the research object. The activated carbon is studied through the adsorption characteristics, adsorption mechanism and influencing factors of mercury in the solution, and the process technology and optimization parameters of the modified activated carbon to treat mercury-containing wastewater are explored. The maximum adsorption capacity of modified activated carbon calculated by Lagergren quasi-first-order kinetic model is 16.62 mg/g. This indicates that the adsorption kinetics of Hg by iron-manganese oxide modified biochar is more consistent with the Lagergren quasi-secondary kinetic model and is also more efficient.

scholarly journals Effects of a manganese oxide-modified biochar composite on adsorption of arsenic in red soil

2015 ◽  
Vol 163 ◽  
pp. 155-162 ◽  
Author(s):  
Zhihong Yu ◽  
Li Zhou ◽  
Yifan Huang ◽  
Zhengguo Song ◽  
Weiwen Qiu
Keyword(s):  
Manganese Oxide ◽  
Red Soil ◽  
Modified Biochar

Solar hydrogen from a manganese oxide based thermochemical cycle

1999 ◽  
Vol 09 (PR3) ◽  
pp. Pr3-331-Pr3-335 ◽  
Author(s):  
M. Sturzenegger ◽  
J. Ganz ◽  
P. Nüesch ◽  
Th. Schelling
Keyword(s):  
Manganese Oxide ◽  
Thermochemical Cycle ◽  
Solar Hydrogen

The Preparation of p(acrylonitrile-co-acrylamide) hydrogels for uranyl ion recovery from aqueous environments

2014 ◽  
Vol 1 (42) ◽  
pp. 89-89 ◽  
Author(s):  
Duygu Alpaslan ◽  
Nahit Aktas ◽  
Selehattin Yilmaz ◽  
Nurettin Sahiner
Keyword(s):  
Uranyl Ion ◽  
Aqueous Environments
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