A method for advanced treatment of acidic lead-containing mining and metallurgy wastewater by polymer-based nanocomposite materials
A nano-composite material and advanced treatment technology, which is applied in the field of industrial wastewater advanced treatment, can solve the problems of poor acid resistance and poor extended use, and achieve strong acid resistance, stable recycling performance, and good selectivity.
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Embodiment 1
[0040] In conjunction with the accompanying drawings, a polymer-based nanocomposite material of this embodiment, when the nanocomposite material is at a pH of 6.0, because of the pre-enrichment effect of the negatively charged groups contained in the skeleton and the specific adsorption properties of the immobilized nanoparticles Synergistic effect, the removal rate of lead in wastewater is 99% (such as image 3 shown). The matrix of the nanocomposite material is a sulfonated styrene-divinylbenzene copolymer sphere, and the electronegative functional group contained in the matrix is a sulfonic acid group, and the sulfonic acid group is a strongly acidic group, It is stable at pH 6.0 and acts as a Donnan pre-enrichment during the adsorption process. The surface of the substrate is evenly distributed with pores, and nano-hydrated zirconia particles are evenly distributed in the pores. The particle size of the nano-hydrated zirconia particles is 2-40nm. Under the strong acid c...
Embodiment 2
[0057] A polymer-based nanocomposite material of this embodiment, its preparation method and its advanced treatment method for acidic lead-containing mining and metallurgy wastewater are basically the same as in Embodiment 1, and the differences are now briefly described as follows:
[0058] The polymer-based nanocomposite material of this embodiment is synthesized according to the following steps:
[0059] (1) Take 12g of zirconium oxychloride into 100ml of hydrochloric acid solution with a concentration of 0.5mol / L, stir until the zirconium oxychloride dissolves, and then add 40ml of absolute ethanol.
[0060] (2) Take 15 g of sulfonated styrene-divinylbenzene copolymer spheres, add to the above solution system, heat to 50° C. in a water bath, and keep stirring at 300 rpm for 15 h.
[0061] (3) After the step (2) is completed, the solid polymer is filtered out, air-dried, and then the dried polymer is transferred to 100 ml of NaOH solution with a concentration of 10% by mass...
Embodiment 3
[0068] A polymer-based nanocomposite material of this embodiment, its preparation method and its advanced treatment method for acidic lead-containing mining and metallurgy wastewater are basically the same as in Embodiment 1, and the differences are now briefly described as follows:
[0069] The polymer-based nanocomposite material of this embodiment is synthesized according to the following steps:
[0070] (1) Take 10g of zirconium oxychloride into 100ml of 0.4mol / L hydrochloric acid solution, stir and dissolve, then add 30ml of absolute ethanol.
[0071] (2) Take 12 g of sulfonated styrene-divinylbenzene copolymer spheres, add to the above solution system, heat to 42° C. in a water bath, and keep stirring at 300 rpm for 15 h.
[0072] (3) After the step (2) is completed, the solid polymer is filtered out, air-dried, and then the dried polymer is transferred to 100 ml of 8% NaOH solution, and continuously stirred at 220 rpm for 12 h.
[0073] (4) After step (3) is completed,...
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Abstract
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