A method for intensification of advanced biological nitrogen removal and reduction of endocrine disrupting toxicity, and belongs to the technical field of advanced wastewater treatment includes the steps of utilizing the reaction of calcium sulfate and hydrogen peroxide solution under alkaline conditions to prepare nano-calcium peroxide (n-CP) oxygen-releasing materials, then the polyvinyl alcohol is used as a framework material, the sodium carboxymethyl cellulose is used as a bonding agent, the stearic acid is used as buffering agent and stabilizing agent, the prepared n-CP is used as an oxygen-releasing material, and the quartz sand is used to increase the material density to the sustained-release calcium peroxide nanoparticles (SR-nCPs) through the encapsulation method.

Provided herein are compositions comprising a plurality of nanoparticles and methods of preparing the same.

The present invention provides a system for high throughput purification of liquid.

An apparatus includes a conduit including an inlet to receive a liquid and an outlet to discharge the liquid. A first porous electrode, a second porous electrode, and a third porous electrode are disposed in the conduit between the inlet and the outlet. A first porous separator is interposed between the first porous electrode and the second porous electrode. A second porous separator is interposed between the second porous electrode and the third porous electrode. A power source configured to provide power to the first porous electrode, the second porous electrode, and the third porous electrode. While the liquid is flowing through the conduit, the power source supplies a first type of voltage to the first porous electrode and the third porous electrode, and supplies a second type of voltage to the second porous electrode, the second type being opposite to the first type.

A method for making a titania-polymer nanocomposite by simultaneously forming TiO.sub.2 nanoparticles in situ from a TiO.sub.2 precursor in the presence of urea and interfacially polymerizing polyamide precursors thereby producing a titania-polymer nanocomposite. A titania-polymer nanocomposite made by this method. A method for removing a dye or metal from water comprising contacting contaminated water with the titania-polymer nanocomposite.

A metal nanoparticles-doped porous carbon bead having an average size of about 0.4 millimeter (mm) to about 0.6 mm is provided. The metal nanoparticles-doped porous carbon bead is doped with silver, copper, or combinations thereof.

Provided herein are coated articles comprising a foam and a coating comprising silanized nanoclay, and methods of preparing the same.

Synthesis, fabrication, and application of nanocomposite polymers in different form (as membrane/filter coatings, as beads, or as porous sponges) for the removal of microorganisms, heavy metals, organic, and inorganic chemicals from different contaminated water sources.

Provided herein is a composition comprising high surface area titanium dioxide nanospheres, as well as a process for making the same. Also provided is a composition comprising carbon nanotubes and high surface area titanium dioxide nanospheres, wherein said high surface area titanium dioxide nanospheres are dispersed in said carbon nanotubes. Further provided is a method for making a filter comprising carbon nanotubes, wherein said carbon nanotubes comprise high surface area titanium dioxide nanospheres dispersed therein, as well as filters so produced, and a method of photo-regenerating the filters.

A method for preparing a core-shell structure polymer magnetic nanosphere with a high Cr (VI) adsorption capacity includes: adding Fe3O4 powder into a mixed solution of water and ethanol, dispersing Fe3O4 powder in the solution evenly by ultrasound, sequentially adding resorcinol and formaldehyde into the suspension to adjust a pH, stirring and reacting to obtain Fe3O4@RF evenly dispersed in a chitosan solution, dropwise adding the prepared suspension into a mixed solution of paraffin and span 80, stirring for a period of time, adding a glutaraldehyde aqueous solution, stirring and reacting to obtain a magnetic chitosan nanosphere. The magnetic chitosan nanosphere prepared may be applied to adsorbing Cr (VI) in a water solution. Not only the magnetic chitosan nanospheres prepared has a high adsorption capacity for Cr (VI), but also can be quickly separated by an external magnetic field after adsorption.