2993 results about "Hydroxyl radical" patented technology

The invention relates to a recycling water saving device of a washing machine, which belongs to the technical field of environmentally-friendly water treatment, comprises a shell, and is characterized in that a recycling water bucket, a water treatment device, a circuit integrated control operation actuator and a control circuit are respectively arranged in the shell, wherein the water treatment device is connected onto the recycling water bucket in parallel, a tap water inlet and a water outlet I of the water saving device are respectively arranged on the upper side of the shell, a water inlet and a water outlet II of the water saving device are respectively arranged on the lower side thereof, and the water treatment device consists of a double pole film and double liquid flow type hydroxyl free-radical generator, an aeration device and a filter unit. The invention comprehensively utilizes the initial discharged washing fluid, keeps the mixed liquid of a first rinsing and a second rinsing to repeatedly wash the clothing, not only the existence and accumulation of the salt content can be neglected, but also the purpose of saving the water resource is achieved. The water saving device is designed into an independent component so as to be compatible to various types of washing machines and detergents. In addition, a program control valve is designed and manufactured to realize the automation of the water saving device.

The invention discloses a textile dyeing wastewater advanced treatment recycling technology. The technology comprises the following steps: filtering to remove textile fibers; cooling; neutralizing, degrading organic matters and decomposing, replacing or degrading (cracking) the chormophoric groups of the organic matters to reduce the chroma of the wastewater; performing biochemical treatment with the biomembrane; precipitating to ensure that the precipitated sludge enters a sludge treatment system and the supernatant enters a flocculation pool; performing chemical treatment, namely adding a medicament in the flocculation pool to remove the suspended matter (SS), CODcr (chemical oxygen demand), BOD (biochemical oxygen demand) and chroma of the water; performing secondary precipitation to ensure that the free SS is precipitated and the wastewater is decolored further; separating to remove and degrade the chloride ions of the reuse water; performing secondary biochemical treatment to further reduce the concentrations of the SS, CODcr and BOD in wastewater; performing ozone oxidation treatment, decoloring, degrading organic matters; performing chemical treatment to remove insoluble dye materials and SS and reduce the COD and chroma; and performing secondary filtration, and forming an ozone / activated carbon system to ensure that the hydroxyl radicals of activated carbon are used and the organic reaction in wastewater is adopted to decolor and degrade organic matters. The invention overcomes the defects of the existing physical method, chemical method and chemical method treatment technologies; and the technology has been used in many enterprises, and the good treatment effects are obtained.

This invention is based on the observed oxidative stress and increased risk on cardiovascular diseases in subjects with increased lipid peroxidation, in particular with women using oral contraceptives and in hormone replacement therapies. The invention provides compositions and combinations, particularly useful in preventing and or reducing the increased lipid peroxidation in subjects in need thereof. These compositions are based on the synergistic combination of zinc and / or a hydroxyl radical scavenger in reducing lipid peroxidation.

A tungsten oxide / titanium dioxide photocatalyst coating oxidizes contaminants in the air that adsorb onto the coating into water, carbon dioxide, and other substances. The tungsten oxide forms a monolayer on the titanium dioxide. When photons of the ultraviolet light are absorbed by the tungsten oxide / titanium dioxide photocatalyst coating, an electron is promoted from the valence band to the conduction band, producing a hole in the valence band. The holes in the valence band react with water applied on the tungsten oxide / titanium dioxide photocatalyst coating, forming reactive hydroxyl radicals. When a contaminant in the air is adsorbed onto the tungsten oxide / titanium dioxide photocatalyst, the hydroxyl radical attacks the contaminant, abstracting a hydrogen atom from the contaminant. The hydroxyl radical oxidizes the contaminant, producing water, carbon dioxide, and other substances. The tungsten oxide / titanium dioxide photocatalytic coating has low sensitivity to humidity variations.

Polysaccharide aldehydes are prepared using selective oxidation involving the use of nitroxyl radical mediated aqueous oxidation with a limited amount of oxidant and defined reaction conditions. These polysaccharide aldehyde derivatives having maximum effective aldehyde and minimal carboxylic acid levels making them especially useful as wet, temporary wet and dry strength additives for paper.

The invention belongs to the technical field of treatment of high concentration organic waste water, and particularly relates to a method for degrading nitrobenzene waste water by a polyphase electrocatalytic oxidation process. The invention solves the problems of high cost and long time consumption in the traditional nitrobenzene waste water methods, low efficiency and high energy consumption in the electrolytic process, high oxidant consumption, high cost and the like in the Fenton process in the prior art for treating high concentration nitrobenzene water waste. The invention mainly adopts the catalytic oxidation action of transition metal catalysts in the electric field, and combines the Fenton process, thereby effectively degrading the high concentration nitrobenzene waste water. The method comprises the following steps that: (1) heterocatalytic reagents (solid catalysts) and particle electrodes, mainly including active carbon, and transition metal oxides and salts, are used for avoiding economic loss and secondary pollution to the environment, which are caused by catalyst loss in heterocatalytic oxidation; (2) under the condition of low pH value of the waste water in cooperation with Fe2+ with strong reducibility, a coupling reactor composed of an electrolysis field and oxidation reaction is used for generating chain reaction for generating an OH hydroxyl free radical, and the OH hydroxyl free radical can carrying out nonselective oxidization on organic substances, thereby finally oxidizing organic pollutants into carbon dioxide and water; (3) by using electric energy as an excitation energy and using cheap air as raw material, nitrobenzene substances in waste water are efficiently degraded under the coupling action of the polyphase electrocatalytic oxidation process and the Fenton process; (4) and the reactor is composed of a direct current regulated power supply, a feed electrode and an electrolytic bath.