The present invention relates to a method and a device for controlling pollutants in basin water resources cycling utilization in agricultural activity areas. The method includes: providing an acidification tank, an aeration tank and a multi-media constructed wetland connected in sequence, which are 4˜10 m far from basin revetment, feeding basin water into the constructed wetland, adsorbing or degrading heavy metals and organic pollutants by the constructed wetland, and then transporting the treated basin water to the agricultural activity areas. The present invention effectively controls the content of heavy metals that will enter the agricultural activity areas, fundamentally reduces the content of heavy metals in the crops, promotes the growth of the crops, maintains sustainable and healthy development of agriculture, and therefore guarantees human health and safety.

The present invention is a method of implementing Water Disinfection System employing a Functional Mixture, copper foam catalyst, continuous flow, UV radiation, and optical receiver pipe in order to inactivate broader range of microbial contaminants in drinking water, both for emergency purification kits and larger filtration systems. The Functional Mixture is formed when the portland cement (CaO—SiO.sub.2—Al.sub.2O.sub.3) and silicon dioxide (SiO.sub.2) combination is applied to the amalgamation of porous copper foam (Cu-Foam) and silver nitrate (AgNO.sub.3) particles, which react through the silver tree reaction (Cu+2AgNO.sub.3.fwdarw.2Ag+Cu(NO.sub.3).sub.2) after spraying over a perforated mask. The high porosity Functional Mixture is placed in UV transmissive receiver pipe with optical properties. These configurations improve the coverage, efficiency, and effectiveness of reducing broader range of pathogenic microbes in water disinfection systems over prior art. Further optimizations are available for broader range of solar lighting conditions and water flow rates.

This Adaptive Catalytic Technology (ACT) water treatment invention uses a series of integrated sequential modular advanced technologies to treat and eliminate or reduce suspended solids, hardness, heavy metals, organic compounds and microorganisms and to provide good tasting chlorine-free sanitized drinking water. The advanced technologies used herein are specifically designed to provide synergistic benefits that minimizes power consumption while improving the overall treatment effectiveness, making it possible to provide a cost effective and sustainable ACT water treatment for point of use drinking water supply for remote or developing areas, as well as residential, commercial, and industrial applications. The advanced technologies employed are environmentally friendly and safe. Specifically, the ACT water treatment invention does not require hazardous chemicals that need special handling to operate or maintain and it does not produce a waste stream or generates disinfection by-products (DBPs), such as, trihalomethanes (THMs) or haloacetic acids (HAAs).

A reactor for water splitting or water treatment includes a first electrode, a second electrode electrically coupled to the first electrode, and a proton exchange membrane separating the first electrode and the second electrode. The first electrode includes a first optical fiber coated with a photocatalytic material.

Provided is a method for treating a hexavalent chromium-containing aqueous solution by water treatment employing a titanium dioxide photocatalyst that is excellent in both photocatalytic activity and solid-liquid separation performance. The method according to the present disclosure includes the steps of: adding catalyst particles to the aqueous solution; reducing hexavalent chromium by irradiating the aqueous solution with light having a wavelength of 200 nanometers or more and 400 nanometers or less while stirring the catalyst particles in the aqueous solution; and stopping the stirring and separating the catalyst particles from the aqueous solution by sedimentation. Each catalyst particle is composed only of a titanium dioxide particle and a zeolite particle, the titanium dioxide particle is adsorbed on the outer surface of the zeolite particle, the zeolite particle has a silica/alumina molar ratio of 10 or more, and the catalyst particles are contained in the aqueous solution at a concentration of 0.4 grams/liter or more and 16 grams/liter or less.

A device for the treatment of fluids has a flow-through housing, a cover, an inlet, a reactor chamber with inner walls, an outlet and UV LED radiation sources directed into the reactor chamber, and also a power supply. The device achieves a high purifying performance with less technical complexity and less installation space and needs only little electrical power. The interior of the reactor chamber has a flow-related design. The radiation sources are arranged in the fluid on or in an inner wall and a rotating fluid vortex is imparted to a fluid flowing through by the flow-related design. The radiation sources radiate radially from the outside inward and/or laterally onto the fluid vortex. At least a partial stream of the fluid in the fluid vortex passes a number of times by the radiation sources before leaving the reactor chamber.

A paste for manufacturing a photocatalyst is provided. The paste for manufacturing the photocatalyst includes an alcohol paste and a photocatalyst precursor. The photocatalyst precursor is dispersed in the alcohol paste, and the photocatalyst precursor includes a first metal precursor and a second metal precursor, wherein the first metal in the first metal precursor includes Zn, Sn, Cu, Fe, Mn, Ni, Co or Ag, and the second metal in the second metal precursor includes Fe.

The sunlight active composite photocatalyst for water purification includes ZnO (zinc oxide) and Co.sub.3O.sub.4 (cobalt II, III oxide). The composite photocatalyst may, in the presence of natural sunlight, achieve complete mineralization of chemical and biological contaminants in water without leaving any hazardous by-products. The composite photocatalyst may be synthesized by a sol gel route or process.

A system for treatment of a polluted effluent, includes an outer chamber configured to treat the polluted effluent in mixture with a purification slurry including particles of one or more catalysts and/or organoclays, or a mixture thereof. The outer chamber includes (i) a stirring unit consisting of an engine and a stirrer, configured to mix the polluted effluent and the purification slurry to prevent the particles from sinking without causing a turbulence, (ii) a membrane located at the top of the outer chamber through which a treated effluent passes, while preventing the particles of one or more catalysts and/or organoclays from exiting the outer chamber together with the treated effluent, (iii) a membrane cleaning system configured to remove and collect the particles of one or more catalysts and/or organoclays accumulated on the membrane, and re-introducing the particles back to the bottom of the outer chamber.

A photocatalytic composition is disclosed that includes a silver halide in combination with one or more rare earth elements. The composition may be used for the photocatalytic degradation of pollutants.