47results about How to "Has a reducing effect" patented technology

The invention discloses a method for treating trivalent chromium complexing wastewater and synchronously recycling chromium by combination of a reducing composite chemical agent and ultraviolet light,and belongs to the field of waste water treatment. A method for treating a copper complex and synchronously removing copper by combination of a reducing composite chemical agent / UV comprises the following steps: A, chemical feeding: feeding the reducing composite chemical agent in trivalent chromium complexing wastewater and stirring, and regulating pH of the wastewater to be 4-10; B, ultravioletillumination: carrying out ultraviolet light illumination treatment on the waste water which is stirred uniformly, and separating out chromium in a precipitate mode; and C, chromium recycling: recycling chromium by a solid-liquid separating method. By the method, trivalent-chromium-containing complexing wastewater such as leather making, electroplating and dyestuff can be safely and effectively treated, and the chromium can be recycled.

A nonwoven fabric sheet having cleaning ability which comprises a web layer (i) formed by the airlaying process which consists mainly of heat-bondable fibers having a fineness of 1.5-50 dtex and has a basis weight of 10-250 g / m<2> and, superposed over the layer (i), a web layer (ii) formed by the airlaying process which consists mainly of 20-100 wt.% heat-bondable fibers (a) having a fineness of 1-4.4 dtex and 80-0 wt.% cellulosic pulp (b) [provided that (a)+(b)=100 wt.%] and has a basis weight of 10-400 g / m<2>, and optionally further includes, superposed over the web layer (ii), a web layer (iii) which is the same as the web layer (i), these layers having been united into a sheet as a whole by the thermal bonding of these heat-bondable fibers. The sheet contains an ingredient (c) comprising either a powder (c1) of an alkaline inorganic salt having cleaning ability or an additive (c2) comprising a powdery organic acid having a hydroxy group and a melting point of 70 DEG C or higher, the ingredient (c) being disposed in an amount of 5-300 g / m<2> in at least one of the following positions: at the interface between the layer (i) and the layer (ii), in the layer (ii), and at the interface between the layer (ii) and the layer (iii). The sheet has an overall basis weight of 40-1,500 g / m<2>.

The invention discloses an alcaligenes and its application to the treatment of chromium-containing wastewater. The strain is Alcaligenes sp.GTM2, and the strain is preserved in the General Microorganism Center of China Microbial Strain Preservation Management Committee, and the preservation place is Beijing Institute of Microbiology, Chinese Academy of Sciences, No. 1, Courtyard 1, Beichen West Road, Chaoyang District. The preservation registration number is CGMCC No. 12347, and the preservation date is April 15, 2016. Alcaligenes GTM2 provided by the present invention has a reduction effect on hexavalent chromium: it is reduced from 1000mg / L to 110mg / L within 24h, and the reduction rate is 89%; Direct dosing of 1% Alcaligenes sp.GTM2 bacteria has a strong reduction ability, and the reduction rate is about 28-56%. Therefore, it can be used for the restoration of chromium-polluted water bodies, which can promote the conversion of available chromium to unusable chromium, reduce Chromium toxicity.

The present invention provides a sintering method for injection-molded copper-based parts, which includes the following steps: (1) selecting copper alloy powder and binder, and making copper alloy powder and binder according to a preset volume ratio into a feed (2) Put the feed material on the copper alloy powder injection machine to form an injection blank, and use an organic solvent to remove part of the binder from the injection blank to form a degreased blank; (3) Put the degreased blank in a vacuum atmosphere for sintering (4) Introduce gas, degrease at low temperature, and sinter at high temperature to make a sintered billet. In the method of the present invention, the hydrogen gas is passed through the low-temperature section to avoid the reaction between the hydrogen gas and the graphite contained in the sintering furnace, the degreasing is more complete, and the oxygen content of the copper alloy powder particles is reduced, the activity is increased, and it is more conducive to sintering; The argon gas flow in the section avoids the volatilization of the alloy components in the copper alloy powder, avoids the pollution of the sintering furnace and the change of the material components.

A cooperative treatment method for dioxin and heavy metal in flying ash on the basis of steel slag and mineral slag is characterized by comprising the following steps that (1) to-be-treated flying ashand a dehalogenation agent are mixed according to a mass ratio of 4:1-9:1, mixed milling is conducted by a planetary mill or a ball mill, and after 2-10 h of continuous ball milling, organochlorine degradation flying ash is obtained; (2) the organochlorine degradation flying ash and a curing agent are mixed according to the mass ratio of 4:1-9:1 and are stirred evenly, and a flying ash mixture isobtained; and (3) water or a reducing agent of the mass ratio of 15% is added into the flying ash mixture, the obtained mixture is put into a compaction die for compaction forming, pressure is 20-50kN, pressing time is 15-30 s, maintenance is conducted for 3-7 days, and a flying ash solidified body is obtained. Through the cooperative treatment method, dioxins and heavy metal pollutants can be treated simultaneously, steel slag serves as a main material of the dehalogenation agent and can be utilized efficiently, and the problem of a low comprehensive utilization rate of the steel slag is solved while the flying ash is treated.