Disclosed is a multifunctional continuous hydrothermal oxidation experiment system, comprising a reactor (12), wherein an inlet of the reactor (12) is connected in parallel with an oxidant pipeline and a material pipeline; the oxidant pipeline comprises a gas oxidant delivery pipe and a liquid oxidant delivery pipe connected in parallel, and the gas oxidant pipe comprises an air oxidant delivery pipe and an oxygen delivery pipe connected in parallel; and a heat exchanger and a preheater are sequentially connected in series on the oxidant pipeline and the material pipeline, the oxidant pipeline and the material pipeline are in communication with an inner pipe of the heat exchanger; and the outlet of the reactor (12) is sequentially in communication, by means of piping, with a corrosion experiment device (14), an outer pipe of the heat exchanger, a cooler (16) and a gas-liquid separator (17).

A cost-effective system and method dissolves gas, such as oxygen, into water in a manner that prevents gas bubble carry over by using a bubble capture system (BCS). The method further eliminates or minimizes turbulence at the suction and discharge of a pump using an energy dissipation header (EDH). The BCS can create a top-down flow that permits bubbles to rise faster than the velocity of the downward flow of water. The EDH can use a pipe design, such as a slotted pipe design, that permits a maximum system water flow. The technology can be applied to water bodies to mitigate eutrophication and may also be applicable in other fields, such as wastewater lift stations, fish farms, oil and gas industry, tidal applications with low flushing rates, and winter under ice oxygenation to prevent fish kills.

A photocatalytically active particulate material includes a particle core of ZnS, particles of a nanoscale metal selected from Au, Ag, Pt, Pd, Cu or an alloy thereof loaded on the particle core, and a layer of Al2O3, SiO2, TiO2 or mixtures thereof on the loaded particle core.

A filter for a liquid purifier, comprising: a filter housing having an inlet to receive water and an outlet to discharge the water; and a filter module provided in the filter housing, and configured to purify water introduced through the inlet, and to provide the purified water to the outlet, wherein the filter module includes a carbon block having a hollow tube shape by mixing activated carbon, a binder, ferric hydroxide, and titanium oxide, and the binder is mixed at a ratio of 13% to 23% by weight.

A filter for a liquid purifier, comprising: a filter housing having an inlet to receive water and an outlet to discharge the water; and a filter module provided in the filter housing, and configured to purify water introduced through the inlet, and to provide the purified water to the outlet, wherein the filter module includes a carbon block having a hollow tube shape by mixing activated carbon, a binder, ferric hydroxide, and titanium oxide, and the binder is mixed at a ratio of 13% to 23% by weight.

In order to solve the problem in the existing conventional water treatment process of low removal efficiency of heavy metal in water, especially lower efficiency for simultaneous removal of heavy metal pollutants during coexisting, a method is provided for removing heavy metal pollutants in water with divalent manganese strengthened ferrate: preparing a ferrate mother liquor having the concentration of 20-10,000 mmol/L; preparing a divalent manganese salt mother liquor having the concentration of 30-10,000 mmol/L; adding the divalent manganese salt mother liquor into water of the heavy metal pollutants; then adding the ferrate mother liquor, and reacting; and then adding a flocculant and precipitating, so that the removal rate of arsenate, chromium, thallium, antimony, chromium and molybdate in water is 90% or more, and the removal rate of heavy metal such as lead and cadmium is 85% or more.

In order to solve the problem in the existing conventional water treatment process of low removal efficiency of heavy metal in water, especially lower efficiency for simultaneous removal of heavy metal pollutants during coexisting, a method is provided for removing heavy metal pollutants in water with divalent manganese strengthened ferrate: preparing a ferrate mother liquor having the concentration of 20-10,000 mmol/L; preparing a divalent manganese salt mother liquor having the concentration of 30-10,000 mmol/L; adding the divalent manganese salt mother liquor into water of the heavy metal pollutants; then adding the ferrate mother liquor, and reacting; and then adding a flocculant and precipitating, so that the removal rate of arsenate, chromium, thallium, antimony, chromium and molybdate in water is 90% or more, and the removal rate of heavy metal such as lead and cadmium is 85% or more.

A water treatment device comprising a clear container with lid surrounded by a solar reflector, and an insert in the form of a thin sheet or mesh permanently coated with titanium dioxide as a water sanitizing catalyst. The container is filled with non-potable water, covered with the lid, and placed in direct sunlight. Direct and reflected sunlight enters the water through the clear container and lid, where the sunlight's UV radiation and increased solar thermal heat disinfect the water. Further, the catalyst on the insert reacts with dissolved oxygen in the water to produce reactive oxygen species. These reactive species react with and decompose organic compounds in the water, and kill or inactivate pathogens. In addition, the reactive oxygen species further react with the water itself to produce additional free radical species, which also react with and decompose organic compounds and kill or inactivate pathogens.

Per- and polyfluoroalkyl substances (PFAS) are destroyed by oxidation in supercritical conditions. PFAS in water can be concentrated and prepared for destruction in a pretreatment phase. Following annihilation of the PFAS in supercritical conditions to levels below 5 parts per trillion (ppt), the water effluent can be used to recover heat, returned to sub-critical conditions, and then released back into the environment.

Per- and polyfluoroalkyl substances (PFAS) are destroyed by oxidation in supercritical conditions. PFAS in water can be concentrated and prepared for destruction in a pretreatment phase. Following annihilation of the PFAS in supercritical conditions to levels below 5 parts per trillion (ppt), the water effluent can be used to recover heat, returned to sub-critical conditions, and then released back into the environment.