Metal-doped high molecular material and preparation method thereof and application thereof to ammonia nitrogen removal

Abstract

The invention provides a metal-doped high molecular material, which consists of a matrix polymer, a hydrophilic group and a transition metal ion which is doped on the matrix polymer, wherein the matrix polymer is formed by polymerizing an organic compound containing -C=C- and a compound containing -C=C-......-C=C-; the quantity of C in the organic compound containing -C=C- is 2-10; the quantity of C in the organic compound containing -C=C-......-C=C- is 4-15; the hydrophilic group is one or more of sulfonyl, cyan, tertiary amino, quaternary ammonium group or hydroxyl; and the transition metal ion is an ion of Ti, V, Cr, Fe, Cu, Ni or Zn. A relatively stable complex can be formed by the transition metal ion and ammonia nitrogen in water, so that the aim of removing ammonia nitrogen from water is fulfilled. The metal-doped high polymer material provided by the invention has the advantages of high absorptive selectivity to ammonia nitrogen in sewage, high absorption amount, concentration of effluent ammonia nitrogen in water less than 10 ppm, convenience for regenerating and simple process.

Description

technical field [0001] The invention relates to ammonia nitrogen removal technology for ammonia nitrogen-containing wastewater, in particular to a metal-doped polymer material used for ammonia nitrogen removal, a preparation method of the polymer material and an application of the polymer material in ammonia nitrogen removal. Background technique [0002] Ammonia nitrogen-containing wastewater exists in many industrial wastewaters, especially in the production processes of steel, fertilizer, inorganic chemical industry, ferroalloy, glass manufacturing, meat processing and feed. Ammonia nitrogen refers to the free ammonia (NH 3 ) and ammonium ions (NH 4 + ) in the form of nitrogen. Ammonia nitrogen is a nutrient in water bodies that can lead to water eutrophication. Ammonia nitrogen in water can be converted into nitrite under certain conditions. If consumed for a long time, nitrite in water will combine with protein to form nitrosamine, which is a strong carcinogen. The...

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Problems solved by technology

The chemical precipitation method has a better effect on treating high-concentration ammonia nitrogen, but the effluent cannot meet the national discharge standards, and MgO and H are needed. 3 PO 4 As a precipitant, the consumption is relatively large, the cost is high, and the precipitate MgNH produced 4 PO 4 No economic value, resulting in secondary pollution; Membrane filtration method requires a large water pressure, so equipment and infrastructure costs are high; Ammonia stripping - stripping method has a simple process and low operating costs, but for ammonia nitrogen wastewater with a pH lower than 10.5 The effect is relatively poor, and it is easy to generate scale, causing serious operational problems; the breakpoint chlorination method is very costly in the treatment of high-concentration ammonia nitrogen; biological denitrification methods include biological nitrification and biological denitrification methods, which occupy a large area and are efficient at low temperatures Low, easily affected by toxic substances, and troublesome in operation and management

[0004] Adsorption methods mainly include ion exchange resin, activated carbon and zeolite adsorption method. Although the oil absorption effect is good, ion exchange resin and activated carbon have no selectivity for ammonia nitrogen, so the adsorption capacity is small and the chemical efficiency is low; although zeolite has certain selectivity for ammonia nitrogen , but the same problem is that the adsorption capacity is small, and it is not suitable for high-concentration ammonia nitrogen wastewater