The present disclosure relates to a process, a system and a use for removing micropollutants (1) in liquid (2). The process comprises providing liquid (2) to a container (3) adapted to hold a liquid and/or a gas, providing magnetic activated carbon (4), mixing it, separating the magnetic activated carbon (4) using a magnetic separator (5), removing between 1 and 100% of the separated used magnetic activated carbon (4), removing the liquid (2), providing new liquid (2) to the container (3), providing the used magnetic activated carbon (4) to the container (3), adding between 1 and 100% of unused magnetic activated carbon (4), repeating the mixing and separation steps at least one time. The process allows for control of several parameters, such as the flow rate of the liquid, dosage of MAC and ratio used/unused MAC required to remove micropollutants from the liquid.

Disclosed is a multi-stage sedimentation rake-free thickening device. The device includes a central tank. A diversion sedimentation zone is arranged on the outside of the center tank. The diversion sedimentation zone includes an annular diversion sedimentation screen and a concentrated magnetic shower. The annular diversion sedimentation screen includes an annular groove spirally arranged around a central groove body. The annular groove is sequentially arranged with second spoiler baffles along the length direction. The lower bottom plate of the annular groove is also provided with second underflow discharge port. Multiple second inclined plate diversion discharge pipe is arranged under the corresponding second underflow discharge ports. The outlets of all the second inclined plate guide discharge pipes are collected to the second underflow discharge pipe, and the settled water is discharged from the second overflow discharge pipe arranged at the end of the annular groove.

A composite material for use in water treatment. The composite material includes a porous matrix including a resin capable of retaining a catalyst and magnetic material therein, and includes a density regulating portion disposed therein. The catalyst is capable of facilitating a chemical reaction involving a contaminants in the water. The magnetic material and density regulating portion can be used to separate the composite material from treated water. Systems and methods of use involving passive water treatment, continuous water treatment, solar light exposure, UV light exposure, and electrochemical cells, employing photochemical, electrochemical, and photoelectrochemical reactions are described. Methods of manufacture are described.

A method of extracting water from sludge, wherein the sludge includes a magnetic ballast, wherein the sludge is positioned on an interface. It includes applying a magnetic treatment to the magnetically-ballasted sludge to extract water from the sludge.

A method of dewatering magnetite to <10% w/w moisture content, including the step of extracting water from the magnetite by virtue of the magnetism of the magnetite, whereby the magnetite pulls together under magnetic attraction thereby squeezing water outwardly and away from the magnetite.

A magnetic magnesium-manganese layered double metal oxide composite and preparation and application. A soluble magnesium salt and a soluble manganese salt are dissolved in water to obtain a magnesium-manganese salt complex liquid; and a soluble carbonate and a soluble hydroxide are dissolved in water to obtain a carbonate-hydroxide complex liquid; a ferroferric oxide powder is added to the carbonate-hydroxide complex liquid, and then ethanol is added for ultrasonic dispersion to obtain a dispersion liquid; then the magnesium-manganese salt complex liquid is added for aging, centrifuging, washing, drying, grinding for sieving, and calcinating at 250-550° C. to obtain a magnetic magnesium-manganese layered double metal oxide composite. The composite of the present invention has relatively strong magnetism to Cd removal, and is featured by high adsorption efficiency, rapid adsorption rate and stability. Moreover, the composite can not only immobilize Cd efficiently, but also can be separated and recycled by magnet.

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. Rare earth magnets electrically connect electrolysis electrode structures and serve as electrolysis electrode segments.

The present disclosure provides an efficient and stable magnetic nanofiber membrane and a preparation method and use thereof, and belongs to the technical field of composites. The preparation method includes the following steps: dissolving polyacrylonitrile or polystyrene, nZVI particles, and n-octyltrimethylammonium bromide in N,N-dimethylformamide, and mixing uniformly to obtain a spinning solution; subjecting the spinning solution to electrospinning; and vacuum-drying a resulting fiber membrane to obtain the efficient and stable magnetic nanofiber membrane. In the present disclosure, the magnetic nanofiber membrane has a high specific surface area, a desirable porosity, an excellent mechanical strength, and satisfactory magnetic properties. The membrane effectively exerts a synergistic effect of the nZVI particles and an organic polymer material carrier, avoids easy oxidation of a catalyst surface and easy particle agglomeration, enhances a catalytic activity of the magnetic nanofiber membrane, and improves an efficiency in organic wastewater treatment.

A method for treating water contaminated with hydrophobic and lipophilic molecules, comprising forming an emulsion of the contaminated water with an oil; and separating from the emulsion an oil part charged with a captured amount of the hydrophobic and lipophilic molecules and a treated water part, the treated water having an amount the in hydrophobic and lipophilic molecules reduced by the captured amount of hydrophobic and lipophilic molecules than an initial amount of the hydrophobic and lipophilic molecules in the contaminated water.