Preparation method of sodium polyacrylate dispersed ferrous sulfide intercalation layered double hydroxide

Abstract

The invention discloses a preparation method of a sodium polyacrylate dispersed ferrous sulfide intercalation layered double hydroxide. The preparation method comprises the following steps: s1, preparing a sodium polyacrylate aqueous solution to obtain a solution A; s2, preparing a layered double hydroxide aqueous solution to obtain a solution B; s3, adding the solution B into the solution A to obtain a mixed solution C; s4, preparing a degassed aqueous solution of FeSO4. 7H2O or FeCl3, so as to obtain a solution D; s5, preparing a Na2S and / or NaBH4 degassed aqueous solution to obtain a solution E; s6, dropwise adding the solution D into the solution C, and stirring to obtain a mixed solution F; and s7, dropwise adding the solution E into the solution F to finally generate a black precipitate, and washing and drying to obtain the sodium polyacrylate dispersed nano ferrous sulfide intercalated layered double hydroxide. Ferrous sulfide dispersed in a sodium polyacrylate solution is intercalated into layered amphiphilic hydroxide, so that ferrous sulfide agglomeration is prevented, metal anions and cations can be synergistically and efficiently adsorbed, heavy metal adsorbing and reduction effects are promoted, and heavy metal toxicity is reduced.

Description

technical field [0001] The invention relates to sewage treatment technology, in particular to a preparation method of sodium polyacrylate dispersed ferrous sulfide intercalated layered double hydroxide. Background technique [0002] Along with industrial production and human activities, a large amount of heavy metals flow into the water body, causing damage to the water environment. For example, the heavy metals and their contents in the sewage of a Zn electroplating wastewater plant are As(III) (89.5mg / L), As(V)(60.8 mg / L), Cr(25.3mg / L), Cd(52.4mg / L), Cu(5.9mg / L), Zn(274.1mg / L), Mn(26.8mg / L) and Fe(33.1mg / L) L) etc. Therefore, the development of composite materials to achieve simultaneous and efficient removal of mixed heavy metals has attracted extensive attention. [0003] Layered double hydroxide is an inorganic material with high efficiency, low cost, cheap and easy to obtain, and simple synthesis process. It has certain adsorption capacity for heavy metals and certai...

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Problems solved by technology

[0006] Aiming at the problems of poor synergistic adsorption effect of metal anions and cations and easy agglomeration of nanocomposite materials, the present invention proposes a preparation method of sodium polyacrylate dispersed nano-ferrous sulfide intercalated layered double hydroxide, and the obtained material realizes the separation of metal anions and cations Synergistic and efficient adsorption

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