Preparation method of Fe<3+>-doped ammonium ion sieve used for selectively exchanging NH4<+> in water body

Abstract

The invention discloses a preparation method of a Fe<3+>-doped ammonium ion sieve used for selectively exchanging NH4<+> in a water body, belonging to the technical field of ammonium ion sieves. Based on the special adsorptive selectivity of an ammonium ion sieve to NH4<+>, the Fe<3+>-doped ammonium ion sieve is utilized for separating and recovering NH4<+>, and efficiently recovering NH4<+> resources in the water body. The Fe<3+>-doped ammonium ion sieve has the advantages of selectively adsorbing NH4<+> in an adsorbed solution under a solution system in which a plurality of positive ions coexist, and being good in adsorption effect, low in cost and beneficial to industrial promotion. Through the doping of Fe<3+>, the ammonium ion sieve has the effects that the stability of the ammonium ion sieve is enhanced, the dissolution loss rate in the regeneration process is reduced, and the cyclic utilization rate of the ammonium ion sieve is increased. The designability is strong, and ion sieves with different structures can be synthesized by proportioning raw materials. The ion sieve achieves the selective recovery of ammonia nitrogen in water, and provides powerful support for resource utilization and development of green economy.

Description

technical field [0001] The invention relates to a method for selectively exchanging NH in water bodies 4 + Fe 3+ The invention discloses a preparation method of doped ammonium ion sieve, which belongs to the technical field of ammonium ion sieve. Background technique [0002] Environmental pollution and resource depletion have become the restrictive factors of my country's sustainable development. At present, the recovery of available resources in the sewage system has attracted widespread attention. Sewage generally contains more NH 4 + 、Na + , Ca 2+ , Mg 2+ and other different cations, Na + , Ca 2+ , Mg 2+ Coexistence of isocations on NH 4 + Recycling has caused great obstacles. At present, there is no material in the industry that can realize NH in the coexistence of other different cations. 4 + selective recycling. The present invention has prepared a kind of to NH 4 + An iron-doped ammonium ion sieve with specific and selective recovery, which is capab...

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Problems solved by technology

The experimental results show that the zeolite molecular sieve has a good effect on K + , Mg 2+ 、Na + The adsorption of ions is high, which seriously affects the molecular sieve to NH 4 + The removal rate, so in the case of coexistence of multiple cations, zeolite molecular sieve for 4 + The selective adsorption is poor, and it is impossible to realize the NH 4 + Selective recovery of

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