Publications by authors named "Scott E Massimi"
Article Synopsis
- - The study explores the recovery of rare earth elements (REEs) from acid mine drainage (AMD) using a method that involves precipitating manganese oxide (MnO) through oxidation with potassium permanganate (KMnO) at acidic pH levels, enabling the removal of REEs and cobalt (Co).
- - Experiments showed that a stoichiometric amount of Mn to KMnO led to 100% removal of REEs and Co at around pH 3.5, while excess KMnO allowed nearly complete removal at pH 2, although sulfate (SO) negatively affected REE adsorption.
- - The developed two-stage process effectively recovered REEs, achieving a solid grade of 6.16 mg
Ordered mesoporous carbon (OMC) scaffolds were covalently modified with primary amine groups by means of oxidation-coupling, yielding C-O-C bonds, or organometallic activation-coupling, yielding C-C bonds. The aminated OMCs were stressed by immersion in either 1 M hydrochloric acid or 1 M sodium hydroxide solutions at room temperature for 6 h and characterized by nitrogen sorption, electron microscopy, low-angle X-ray diffraction, thermogravimetric analysis, and the 4-nitrobenzaldehyde assay. Results demonstrate that aminated surfaces of OMC by butyllithium grafting are stable toward both 1 M HCl and 1 M NaOH, whereas the oxidation-aminated OMC surfaces can withstand 1 M NaOH only.
View Article and Find Full Text PDFResearch on permanently porous nanomaterials has gripped the attention of materials chemists for decades. Mesoporous silica nanoparticles (MSNs) and metal-organic frameworks (MOFs) are two of the most studied classes of materials in this field. Recently, explorations into embedding MOFs within the mesopores of MSNs have aimed to create composites that are greater than the sum of their parts.
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