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Introduction of ferrous sulfate
Ferrous sulfate formula for FeSO4.7 H2O, Chinese name: green vitriol; Seven water ferrous sulfate; Iron vitriol, is a kind of rare metal products sulfuric acid production process, produced as a byproduct of the product appearance is light green or yellowish green crystalline solid. Or after drying can be five water ferrous sulfate is mainly used in inorganic fertilizer; Organic fertilizer additive is used, is blue-green or light green powder; Particles, mainly used for sewage treatment; In the field of medicine, ferrous sulfate can be used as a local convergence and the role of blood, for uterine fibroids caused by chronic blood loss has a good curative effect.
Ferrous sulfate in the field of chemical industry has a good reducibility, commonly so it is also widely used in the field of the water purification, to urban waste water and industrial water, use made of ferrous sulfate flocculation agent can effectively remove the harmful material such as wastewater of phosphate, prevent the transition of water quality eutrophication. Ferrous sulfate only in completely under the condition of high temperature, releasing toxic gases, and doesn't like sulfuric acid. Ferrous sulphate density is 1.**9, and can completely soluble in water, forming a green liquid.
Ferrous sulfate purposes
ferrous sulfate is mainly used as flocculant flocculation effect is good, has the very good decoloring ability, but also has to remove heavy metal ions, to oil, phosphorus removal, sterilization function, especially for decolorization of printing and dyeing wastewater and removal of COD, electroplating wastewater ferrite coprecipitation obvious effects, and the price is cheap, is a worthy printing and dyeing, electroplating wastewater treatment, such as the preferred products.
1, as a reducing agent: ferrous sulfate is a strong reducing agent, to the water content of chromium waste water of hexavalent chromium electroplating factory back into trivalent chromium.
2, as flocculating agent, is the most common use of ferrous sulfate as flocculant, it as a flocculant has the following advantages: sedimentation speed, large granular sludge, the sludge volume small and compact, except for the color effect is good, very suitable for the disposal of wastewater from printing and dyeing, washing and other textile), non-toxic and beneficial organisms (very suitable for use in the subsequent biochemical treatment process of wastewater treatment system), without changing the original technology, and the price is low, as a flocculant, ferrous sulfate can replace polyaluminium chloride, alkali type, polyaluminium ferric chloride, aluminium sulphate, ferric chloride, etc.
3, as a biological nutrients: mainly as the iron nutrition of microbes in biological system, improve the activity of microorganism in the system, to ensure and improve the system efficiency and stability.
4, as precipitant: sediment can be generated and sulfide, phosphate, etc, thus removing sulfide, phosphate, such as examples, using ferrous sulfate dyeing of sulfur-containing wastewater treatment.
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