Mechanisms of electro-assisted persulfate/nano-Fe oxidation process: Roles of redox mediation by dissolved Fe.

Mechanisms involved in an electrochemically assisted oxidation process using persulfate and nanosized zero-valent iron (NZVI) were elucidated. Initially, Fe acted as a source of Fe to activate the persulfate, then Fe/Fe redox mediation between cathode and persulfate played a decisive role in persulfate activation at a current density low enough not to inhibit Fe corrosion. An excessive current density which resulted in a low cathodic potential limited Fe corrosion and therefore limited the supply of dissolved Fe to activate the persulfate.

Carbonation/granulation of mine tailings using a MgO/ground-granule blast-furnace-slag binder.

A carbonation/granulation process for treating mine tailings using a MgO/ground-granule blast-furnace-slag (GGBS) binder was developed. The materials were mixed and granules produced using a granulator, then the granules were cured in a CO atmosphere. The optimum granulator rotation speed and retention time were 60 rpm and 7 min, respectively.

Effect of CO concentration on strength development and carbonation of a MgO-based binder for treating fine sediment.

We previously described a MgO-based binder for treating fine sediment and simultaneously store CO. Here, we describe a study of the physical/mechanical characteristics and carbonation reactions of the MgO-based binder used to solidify/stabilize fine sediment in atmospheres containing different CO concentrations. Carbonation of the sediment treated with the MgO-based binder at the atmospheric CO concentration markedly improved the compressive strength of the product.

Activation of Persulfate by Nanosized Zero-Valent Iron (NZVI): Mechanisms and Transformation Products of NZVI.

The mechanisms involved in the activation of persulfate by nanosized zero-valent iron (NZVI) were elucidated and the NZVI transformation products identified. Two distinct reaction stages, in terms of the kinetics and radical formation mechanism, were found when phenol was oxidized by the persulfate/NZVI system. In the initial stage, lasting 10 min, Fe was consumed rapidly and sulfate radicals were produced through activation by aqueous Fe.

Power Enhancement of Lithium-Ion Batteries by a Graphene Interfacial Layer.

We achieved a method for power enhancement of heavy-duty lithium-ion batteries (LIBs) by synthesizing a graphene interfacial layer onto the anode copper current collector (ACCC). We tested fabricated coin cells, which used either 35-μm-thick rolled pristine copper foil or graphene synthesized onto the pristine copper foil for power output estimation of the LIBs. We observed the copper surface morphology with a scanning electron microscope (SEM).

Nonsurgical treatment of an incompletely excised primary adenocarcinoma of nonpigmented ciliary epithelium.

Primary adenocarcinoma of the nonpigmented ciliary epithelium (NPCE) is a very rare disease and the majority of acquired cases were treated by enucleation. We report the case of a 19-year-old man who had an adenocarcinoma arising from the NPCE. The tumor was found incidentally due to changed pupil shape.