An embodiment provides A method for making a non-hazardous iron product for treating wastewater, including: adding sodium bisulfite to a solution comprising iron, creating an aqueous solution; adding an amount of sodium hydroxide to the aqueous solution to increase the pH of the aqueous solution to between 2-2.5; determining an amount of sodium bicarbonate and adding the identified amount of sodium bicarbonate to the aqueous solution, wherein the sodium bicarbonate adjusts the pH of the aqueous solution to a desired pH; and providing a buffer to the aqueous solution to generate a slurry. Other embodiments are described and claimed.

An embodiment provides A method for making a non-hazardous iron product for treating wastewater, including: adding sodium bisulfite to a solution comprising iron, creating an aqueous solution; adding an amount of sodium hydroxide to the aqueous solution to increase the pH of the aqueous solution to between 2-2.5; determining an amount of sodium bicarbonate and adding the identified amount of sodium bicarbonate to the aqueous solution, wherein the sodium bicarbonate adjusts the pH of the aqueous solution to a desired pH; and providing a buffer to the aqueous solution to generate a slurry. Other embodiments are described and claimed.

The present disclosure relates to a sulfidated nanoscale zero valent iron particle, as well as a preparation method and application thereof. The preparation method of the sulfidated nZVI particle includes the following steps: 1) ferrous salt is reacted with NaBH4 to prepare nZVI particles; and 2) mixing the nZVI particles with the elemental sulfur powder to prepare the iron sulfides layer-coated nZVI particles. The present disclosure uses elemental sulfur powder as a sulfur source for coating the nZVI particles. The reaction conditions are mild, easy to operate, and the production cost is low. Thus, the technical solution of the present disclosure is convenient for large-scale production, and the prepared sulfidated nZVI particles have high selectivity and reductive transformation capacity for target contaminants, and thus can be used in large-scale remediation of contaminated groundwater or soil.

The present disclosure relates to a sulfidated nanoscale zero valent iron particle, as well as a preparation method and application thereof. The preparation method of the sulfidated nZVI particle includes the following steps: 1) ferrous salt is reacted with NaBH4 to prepare nZVI particles; and 2) mixing the nZVI particles with the elemental sulfur powder to prepare the iron sulfides layer-coated nZVI particles. The present disclosure uses elemental sulfur powder as a sulfur source for coating the nZVI particles. The reaction conditions are mild, easy to operate, and the production cost is low. Thus, the technical solution of the present disclosure is convenient for large-scale production, and the prepared sulfidated nZVI particles have high selectivity and reductive transformation capacity for target contaminants, and thus can be used in large-scale remediation of contaminated groundwater or soil.

An apparatus includes a nanocrystal. The nanocrystal includes a core including FeS.sub.2; and a coating including a ligand component capable of chemically interacting with both an iron atom and a sulfur atom on a surface of the core.

An apparatus includes a nanocrystal. The nanocrystal includes a core including FeS.sub.2; and a coating including a ligand component capable of chemically interacting with both an iron atom and a sulfur atom on a surface of the core.

The present disclosure relates to compositions, systems and methods for removing iron sulfide scale from a solid object, such as an oilfield component. The compositions include a carbon-carbon (CC) double bond with an electron withdrawing group bonded to at least one of the double-bonded carbons.

Provided is an anode for sulfide all-solid-state batteries, which is configured to suppress the expansion of the anode during charge, though a Si-based anode active material is used. Also provided is a sulfide all-solid-state battery including the anode. The anode for sulfide all-solid-state batteries may be an anode for sulfide all-solid-state batteries, wherein the anode includes anode material particles, and wherein each anode material particle includes a laminate which includes void layers and Si-based material layers containing at least one Si-based material selected from the group consisting of Si and a Si alloy, and in which the Si-based material layers and the void layers are alternately laminated, and a coat film covering a surface of the laminate to cover at least the void layers.

Provided is an anode for sulfide all-solid-state batteries, which is configured to suppress the expansion of the anode during charge, though a Si-based anode active material is used. Also provided is a sulfide all-solid-state battery including the anode. The anode for sulfide all-solid-state batteries may be an anode for sulfide all-solid-state batteries, wherein the anode includes anode material particles, and wherein each anode material particle includes a laminate which includes void layers and Si-based material layers containing at least one Si-based material selected from the group consisting of Si and a Si alloy, and in which the Si-based material layers and the void layers are alternately laminated, and a coat film covering a surface of the laminate to cover at least the void layers.

The present disclosure relates to sulfur-containing zerovalent iron nanoparticles and the use of same for transforming chlorinated solvent pollutants and which may therefore be useful as water treatment technology for restoration of groundwater resources contaminated with toxic, chlorinated solvent pollutants.