A method of removing chemical contaminants from a composition comprising an active, a solvent, and a contaminant can include providing an initial feed supply, wherein the initial feed supply comprises the active, the solvent, and the contaminant, wherein the contaminant can include 1,4 dioxane, dimethyl dioxane, or a combination thereof; including filtering the initial feed stock through a nanofilter and using reverse osmosis.

An in-house closed water filter system to remove carcinogenic 1,4-dioxane and other contaminants to purify drinking water. A resin is engineered by a method developed to identify 1,4-dioxane and remove it using direct photolysis and advanced oxidation processes involving UV/H.sub.2O.sub.2/Fe(II). The resin is coupled with granulated activated charcoal to create an in-house filter system.

The present invention discloses a method for preparing Erdite rod-shaped particles for water treatment by utilizing iron-containing waste mud in an underground water plant. In the method, aqueous iron mud is subjected to mechanical dehydration to obtain a first aqueous iron mud; sodium sulfide is added to the first aqueous iron mud to obtain a first mixture, wherein the ratio of the weight of the first aqueous iron mud to the volume of sodium sulfide is between 3% and 15%; water of an equal volume is added to the first mixture, and the obtained solution is heated in an airtight manner to 140° C.-270° C.; centrifugal treatment is performed to obtain a supernatant and a solid, and the solid is subjected to vacuum drying at 40° C.-60° C. for 24 h to obtain Erdite rod-shaped particles. In the method, aqueous iron mud formed after precipitation of backwash wastewater is directly used, no drying treatment is needed, and silicon and aluminum and other impurities do not need to be removed, thereby saving costs; Na.sub.2S is directly added to iron mud which is subjected to mechanical dehydration, and adjustment of pH value is not needed, therefore, the preparation method is convenient; and a supernatant can be recycled, thereby lowering preparation cost, and expanding an application range of the method.

Disclosed is an electro-Fenton-like (EFL) platform wherein an electrochemically produced acidic environment supports heterogeneous Fenton-like reaction for high throughput water treatment. The platform enables treatment of contaminated water.

Provided herein are processes for the removal and/or recovery of a target metal from a liquid sample, said process comprising: [1] applying acoustic cavitation to the liquid; and [2] adding an iron (II) salt, or a precursor form thereof, to the liquid sample and allowing Fenton oxidation reaction to occur between the iron and hydrogen peroxide in the liquid, thereby producing hydroxyl radicals; thereby producing a target metal salt or metal oxide having a reduced solubility in the liquid sample, leading to removal of the target metal from the liquid sample. The use of metal ligands in such processes is also described, as well as systems for performing such processes. Methods, processes, and systems for removing organic contaminants from a liquid sample are also described.

The invention concerns a device for regenerating activated carbon in the form of porous fibres by electro-Fenton reaction, a method for regenerating activated carbon loaded with organic pollutants using the device of the invention, and the use of a filter consisting of porous fibres of activated carbon, which filter has previously been loaded with organic pollutants by filtration of polluted water or polluted air, as the cathode of an electro-Fenton reaction for regenerating the activated carbon porous fibres loaded with organic pollutants.

According to the present disclosure, a photoelectrochemical cell for wastewater treatment is disclosed. A method of fabricating such a photoelectrochemical cell is also disclosed.

The present disclosure discloses a treatment process and treatment system of enhanced up-flow multiphase wastewater oxidation. The treatment process includes the following steps: 1) the wastewater is fed into the up-flow multiphase wastewater oxidation system for oxidation treatment; 2) the wastewater is fed to the solid-liquid separation system for solid-liquid separation, the separated heterogeneous catalytic carrier (5) is fed back to the up-flow multiphase wastewater oxidation system, and the wastewater is fed to the neutralization and degassing system; 3) the wastewater is fed to the neutralization and degassing system to adjust a pH of the wastewater to 5.5-7.5, and then is degassed by stirring; 4) the wastewater is fed to the flocculation and sedimentation system for sludge-water separation, a supernatant is discharged, and an outward harmless treatment is performed after a pressure filtration of a sedimentary iron sludge.

A system for treating pharmaceutical waste at a location at which the pharmaceutical waste is disposed includes a waste conduit having an inlet that is configured to receive the pharmaceutical waste, a diluent conduit fluidly coupled to the waste conduit and configured to discharge water into the waste conduit, a first reagent conduit fluidly coupled to the waste conduit and configured to dispense a first reagent into the waste conduit, and a second reagent conduit fluidly coupled to the waste conduit and configured to discharge a second reagent into the waste conduit. In some embodiments, the waste conduit further comprises an outlet disposed downstream from the second reagent conduit. The waste conduit may be free of waste-receiving vessels between the inlet and the outlet.

Disclosed is a method of removal of an organic pollutant from an aqueous solution, comprising: a) contacting the solution with an anode and a cathode comprising a carbon material; b) applying electrical current to the anode, thereby generating reactive oxygen species; b) oxidizing the organic pollutant with the reactive oxygen species; and c) regenerating the carbon material. Also disclosed is a method of producing reactive oxygen species, comprising: a) flowing an aqeous solution through a reactor comprising at least one cathode and at least one anode; b) applying electrical current to the at least one anode; and c) collecting a product solution comprising reactive oxygen species.