Disclosed are magnetic nanoparticles and methods of using magnetic nanoparticles for selectively removing biologics, small molecules, analytes, ions, or other molecules of interest from liquids.

The invention discloses a core-shell structure polymer magnetic nanosphere with a high Cr (VI) adsorption capacity and its preparation method and application. The preparation method includes: adding Fe.sub.3O.sub.4 powder into a mixed solution of water and ethanol, dispersing Fe.sub.3O.sub.4 powder in the solution evenly by ultrasound, sequentially adding resorcinol and formaldehyde into the suspension to adjust a pH, stirring and reacting to obtain Fe.sub.3O.sub.4@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.

The present invention relates to a process for separating microplastics from aqueous matrices based on the interaction of said microplastics with magnetic minerals containing iron, such as magnetite, which gives rise to the formation of a microplastic/magnetic iron mineral aggregate that can be readily separated from the water by applying a magnetic field.

The present disclosure provides for methods and systems for separating ultrafine particulate pollutants from aqueous suspensions. The present disclosure provide for methods and systems that can reduce the amount of ultrafine particulate pollutants from aqueous solutions, for example storm water runoff, which are not readily or easily removed using current state of the art techniques. In general, methods of the present disclosure provide for removing a portion of target ultrafine particulate pollutants using magnetic nanoparticles, which form aggregates with the ultrafine particulate pollutants. After a time period a magnetic field is applied and the aggregate can be separated from the aqueous suspension. Subsequently, the aggregates can be broken down and the magnetic nanoparticles recycled or reused while the ultrafine particulate contaminants are further processed, recycled, or disposed of.

A filtration device is configured to be connected to an existing condensate drain line of a heating, cooling, and ventilation system. The filtration device is configured to collect metal and other debris as the condensate moves through the device and prevents the condensate drain line from getting a clog. When a clog is present or other issues affect a level of condensate to rise in the device and stop from draining properly, the device is configured to shut off the heating, cooling, and ventilation system. Alternatively, the device is configured to provide an alternate pipe for drainage.

Described herein is a flow-through application and system that utilizes a nanoparticle technology, which is modular and scalable, that can be utilized to recover a contaminant from water using an attendant pump and in-line sensors along with magnets and ultrasonic energy to separate magnetic nanoparticles from an aqueous mixture and to further separate recovered contaminant from contaminant-adsorbent nanoparticles. The contaminant can include an organic contaminant, such as an oil.

A reverse coffee extraction device according to an embodiment includes a pump configured to pump water upwards; and a brewing container installed above the pump to extract coffee, wherein the water pumped upwards is delivered to the brewing container and moves upwards, and the coffee in the brewing container is brewed and extracted to an outside while the water supplied down moves up.

An electromagnetic pulsed-wave system having an electromagnetic boom for generating a time-varying pulsed-wave to control a colloidal mixture disposed in water and a depository. The electromagnetic boom comprising a plurality of electrically coupled solenoids disposed at the water for providing electromagnetic pulses to generate the time-varying pulsed-wave to transport the colloidal mixture. The depository having an electromagnetic ramp magnetically coupled with the electromagnetic boom and a separation receptacle for separating magnetized particles from the colloidal mixture.

A system for treating metal-contaminated wastewater includes a primary treatment sub-system, a secondary treatment sub-system, and a tertiary treatment sub-system. The tertiary treatment sub-system includes a reactor tank, a source of ballast material, a source of coagulant, a solids-liquid separator, and a controller configured to recycle ballasted solids from the solids-liquid separator to the reactor tank an amount sufficient to generate metal hydroxide floc in the reactor tank to reduce a concentration of dissolved metal in the reactor tank.

An efficient, cost-effective, and efficacious technique for removing coal ash and other pollutants from waterways, ponds, marshes, holding tanks and other water sources and supplies. An apparatus comprising an open cage including electromagnets and/or permanent magnets and/or electrodes is supplied with electrical power to extract materials such as rare earth elements and/or heavy metals. The materials levitate to the surface, forming a slurry while leaving water substantially free of such materials.