The preparation of nanostructure type MANGANESE OXIDE and cobalt OXIDE materials with the smallest particle size is reported here. The nanorod MANGANESE OXIDE and cobalt OXIDE nanotube were prepared via a sol-gel reaction in reverse micelles from KMnO4 and CoCl2 with respectively source at room-temperature. The structure and surface morphology of the obtained MANGANESE OXIDE were studied by means of X-ray diffraction analysis (XRD), scanning electron microscopy (SEM) and transmission electron microscopy.

Discharge of untreated industrial wastewater containing heavy metals such as Pb2+ is hazardous to the environment due to their high toxicity. This study reports on the adsorption, desorption, and kinetic study on Pb2+ removal from aqueous solutions using wood/Nano-MANGANESE OXIDE composite (WB-NMO). The optimum pH, contact time and temperature for adsorption were found to be 5. 0, 4 h and 333 K, respectively. Pseudo-second-order kinetics best described the adsorption process with an initial sorption rate of 4. 0 mg g min-1, and a half-adsorption time t1/2 of 31. 6 min. Best fit for adsorption isotherm was obtained with the Brunauer-Emmett-Teller (BET) model with a maximum adsorption capacity of 213 mg/g for an initial metal concentration of 60 mg/L. Both intra-particle diffusion and film diffusion contribute to the rate-determining step. Desorption experiments with 0. 5 mol/L HCl, inferred the reusability of the composite. Adsorption experiment of Pb2+ from industrial wastewater confirmed that the prepared WB-NMO is a promising candidate for wastewater treatment. The WB-NMO demonstrated high Pb2+ removal efficiency and is considered as a promising alternative and reusable composite for lead removal from contaminated effluents.

In this research, zinc OXIDE-MANGANESE OXIDE nanocomposite adsorbent based on active alumina was synthesized by heterogeneous precipitation method of urea homogeneous hydrolysis that is an applied and economical method. The effect of calcination temperature on morphology, formation of phase, type of formed bonds and the crystallite size of nano-composite were tested by X-ray diffraction (XRD), field emission scanning electron microscope (FESEM), analysis of gravimetric thermal (TGA) and fourier transform infrared (FT-IR). The effect of different weight ratios of zinc OXIDE and MANGANESE OXIDE (alumina with constant wt%) on surface area, surface charge of nanocomposites and eventually adsorption of methyl orange anionic dye were investigated. The results indicated that the sample contains 35 wt. % of zinc OXIDE calcined at 400 ° C, showed 96 % adsorption efficiency (within twenty minutes) for the methyl orange anionic dye. These can be attributed to the high surface area (88 m2/gr) and also active sites of the nanocomposite. Microscopic observations showed formation of nanoflakes on surfaces of active alumina particle. J. Color Sci. Tech. 11(2018), 245-255© . Institute for Color Science and Technology.

The adsorption of Fe2+ by the MANGANESE OXIDE coated zeolite (MOCZ) and iron OXIDE coated zeolite (FOCZ) was studied. Surface properties of adsorbents have been investigated for monitoring their changes and morphology for both of the MOCZ and FOCZ. Main variables namely; contact time, pH, initial concentration of Fe2+, size and dosage of adsorbent have been optimized, and the results contrasted with isotherm and kinetic models for finding best fit. The best fit of the adsorption isotherms was obtained using the Langmuir model (R2=0. 96 and 0. 92) using MOCZ and FOCZ. The rates of adsorption were found to conform to the pseudo-second-order kinetic with a good correlation (R2=0. 98 and 0. 82 for MOCZ and FOCZ, respectively). The results indicated that MOCZ has good ability (80% removal of Fe2+) for the removal of Fe from water. The MOCZ exhibited the porous structure with high surface area rather than FOCZ, and the percentage removal of Fe2+ by MOCZ was better than FOCZ.

MANGANESE OXIDE supported on alumina was prepared for methanation reaction by doping the MANGANESE OXIDE based catalyst with noble metals, namely ruthenium, Ru and palladium, and Pd, via an impregnation method. The potential catalyst was calcined at 400°C, 700°C and 1000°C for 5 hours separately. An in-house-built micro reactor with an FTIR detector and GC was used to study the percentage of CO2 conversion and also the percentage of CH4 formation. Ru/Mn (30:70)-Al2O3 calcined at 1000°C was the potential catalyst, which gave 86.82% CO2 conversion and 61.94% CH4 yield at a reaction temperature of 200°C. XRD analysis showed that the catalyst is of a crystalline phase, while FESEM illustrated the catalyst surface was covered with small and dispersed particles with an undefined shape. EDX analysis revealed that there was 21.15% reduction of Ru in the spent catalyst compared to the fresh catalyst due to the migration of Ru particles into the porous support during the reaction. There was 5.39% reduction of surface area over the spent Ru/Mn (30:70)-Al2O3 catalyst, characterized by Nitrogen Adsorption analysis. FTIR analysis revealed that the catalyst surface is hydrated.

MANGANESE OXIDE nanoparticles were synthesized by sol-gel technique. Annealing in 250° C leading to produce Mn3O4. Mn2O3 was obtained by increasing annealing temperature. Potassium permanganate and maleic acid were used to produce MnO2 at room temperature. The structural properties of MANGANESE OXIDEs were investigated by XRD spectrum and the average crystallite size were identified in the range of 38-51nm. The magnetic properties of the samples were studied by VSM. The effect of annealing temperature on the hysteresis cycle showed different χ m for Mn3O4 and Mn2O3.

Introduction: Pyrimethamine and sulfadiazine are selective medications for toxoplasmosis, but some side effects hinder their consumption. Increasing the use of nanoparticles in biological studies and showing the benefi cial effects of MANGANESE nanoparticles on fungi and bacteria, as well as the lack of suffi cient knowledge on its anti-Toxoplasma im-pacts, was the motivation for the design of this study. MANGANESE can provoke cell apoptosis by increasing the activation of the FRXO 3 a-Bim/ PUMA mRNA and caspase-3 pathway. The objective of this study was to investigate the effi cacy of MANGANESE OXIDE nanoparticles (Mn 2 O 3 NPs) against Toxoplasma gondii (T. gondii) in vitro. Methods: To assess the anti-Toxoplasma activity of Mn2O3 NPs, the light microscopic observation was applied to evaluate the number of residual parasites in each well. Then, the MTT method was used to specify the toxic effect of Mn 2 O 3 NPs on T. gondii toxicity. Finally, the potential apoptosis of T. gondii by Mn2O3 NPs was investigated by fl ow cytometry assay Results: The IC50 value of Mn 2 O 3 NPs against T. gondii tachyzoite was 105 μ g/ml. There was also no signifi cant toxic effect of Mn 2 O 3 NPs on macrophages due to the high percentage of surviving macrophages at the desired concentration for treatment. The fi ndings of the fl ow cytometry revealed that about 40% of tachyzoites were caused to apoptosis with Mn 2 O 3 NPs. Conclusion: Mn 2 O 3 NPs have a benefi cial effect on T. gondii tachyzoite in vitro and could be regarded as a candidate for the treatment of this infection.