Novel iron manganese oxide modified mulberry biochar for the adsorption of phosphorus in aqueous solution

2020 ◽  
Vol 189 ◽  
pp. 357-366 ◽  
Author(s):  
Meina Liang ◽  
Liling Yan ◽  
Dunqiu Wang ◽  
Xu Cheng ◽  
Zhenliang Deng ◽  
...  
Keyword(s):  
Aqueous Solution ◽  
Manganese Oxide ◽  
Iron Manganese

Removal of Arsenic from Water Using a Composite of Iron–Manganese Oxide Incorporated Active Rice Husk Silica

2021 ◽  
Vol 49 (4) ◽  
pp. 2000233
Author(s):  
Trung Huu Bui ◽  
Van Sy Pham ◽  
Nguyen Thanh‐Nho ◽  
Quoc An Trieu
Keyword(s):  
Manganese Oxide ◽  
Rice Husk ◽  
Rice Husk Silica ◽  
Removal Of Arsenic ◽  
Iron Manganese

scholarly journals Adsorption of Mn2+ from Aqueous Solution Using Manganese Oxide-Coated Hollow Polymethylmethacrylate Microspheres (MHPM)

2021 ◽  
Vol 2021 ◽  
pp. 1-10
Author(s):  
Dhiraj Dutta ◽  
Jyoti Prasad Borah ◽  
Amrit Puzari
Keyword(s):  
Aqueous Solution ◽  
Manganese Oxide ◽  
Adsorption Capacity ◽  
High Surface ◽  
High Surface Area ◽  
Freundlich Isotherm ◽  
Ion Concentration ◽  
Isotherm Models ◽  
Maximum Adsorption Capacity ◽  
Coated Sand

Results of investigation on adsorption of Mn2+ from aqueous solution by manganese oxide-coated hollow polymethylmethacrylate microspheres (MHPM) are reported here. This is the first report on Mn-coated hollow polymer as a substitute for widely used materials like green sand or MN-coated sand. Hollow polymethylmethacrylate (HPM) was prepared by using a literature procedure. Manganese oxide (MnO) was coated on the surface of HPM (MHPM) by using the electroless plating technique. The HPM and MHPM were characterized by using optical microscopy (OM), scanning electron microscopy (SEM), Fourier-transform infrared spectroscopy (FTIR), X-ray diffraction (XRD), and thermogravimetric analysis (TGA). Optical and scanning micrographs were used to monitor the surface properties of the coated layer which revealed the presence of MnO on the surface of HPM. TGA showed the presence of 4-5% of MnO in MHPM. Adsorption isotherm studies were carried out as a function of pH, initial ion concentration, and contact time, to determine the adsorption efficiency for removal of Mn2+ from contaminated water by the synthesized MHPM. The isotherm results showed that the maximum adsorption capacity of MnO-coated HPM to remove manganese contaminants from water is 8.373 mg/g. The obtained R 2 values of Langmuir isotherm and Freundlich isotherm models were 1 and 0.87, respectively. Therefore, R 2 magnitude confirmed that the Langmuir model is best suited for Mn2+ adsorption by a monolayer of MHPM adsorbent. The material developed shows higher adsorption capacity even at a higher concentration of solute ions, which is not usually observed with similar materials of this kind. Overall findings indicate that MHPM is a very potential lightweight adsorbent for removal of Mn2+ from the aqueous solution because of its low density and high surface area.

Mixed-valence mesoporous manganese oxide spheres from waste manganese nitrate aqueous solution

2019 ◽  
Vol 284 ◽  
pp. 353-359 ◽  
Author(s):  
Andrzej Sienkiewicz ◽  
Agnieszka Kierys ◽  
Marta Grochowicz ◽  
Aldona Nowicka ◽  
Jacek Goworek
Keyword(s):  
Aqueous Solution ◽  
Manganese Oxide ◽  
Mixed Valence ◽  
Manganese Nitrate

Reduction of iron–manganese oxide particles in a lab-scale packed-bed reactor for thermochemical energy storage

2020 ◽  
Vol 221 ◽  
pp. 115700 ◽  
Author(s):  
Marziyeh Hamidi ◽  
Vincent M. Wheeler ◽  
Xiang Gao ◽  
John Pye ◽  
Kylie Catchpole ◽  
...  
Keyword(s):  
Energy Storage ◽  
Manganese Oxide ◽  
Packed Bed ◽  
Packed Bed Reactor ◽  
Reduction Of Iron ◽  
Oxide Particles ◽  
Iron Manganese
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