Calcium polysulfide vulcanized zero-valent iron nano composite material as well as preparation method and application thereof

[0030] A preparation method of calcium polysulfide sulfide zero-valent iron nanocomposite material is provided, comprising the steps of:

[0031] S1. Configure 7.2ml 29% calcium polysulfide solution;

[0032] S2. take by weighing 10.2141g sodium borohydride solid and be dissolved in 667.8ml deionized water, prepare 0.4mol / L sodium borohydride solution, transfer the calcium polysulfide solution in S1 to the sodium borohydride solution and mix well, pass into high Pure nitrogen removes dissolved oxygen in water;

[0033] S3. take by weighing 31.275g ferrous sulfate heptahydrate and be dissolved in 225ml deionized water, configure the ferrous sulfate heptahydrate solution of 0.5mol / L;

[0034] S4. Transfer the ferrous sulfate heptahydrate solution obtained in S3 to a three-necked flask, turn on the electric stirring device, feed high-purity nitrogen before and after the reaction to remove dissolved oxygen in water, and add the mixed solution configured in S2 dropwise to the fla

[0037] A preparation method of calcium polysulfide sulfide zero-valent iron nanocomposite material is provided, comprising the steps of:

[0038] S1. Configure 1.8ml 29% calcium polysulfide solution;

[0039] S2. Weigh 10.2141g of sodium borohydride solid and dissolve it in 673.2ml of deionized water to prepare a 0.4mol / L sodium borohydride solution, transfer the calcium polysulfide solution in S1 to the sodium borohydride solution, and feed high-purity nitrogen gas Remove dissolved oxygen in water;

[0040] S3. Weigh 31.275g of ferrous sulfate heptahydrate and dissolve it in 225ml of deionized water to prepare a 0.5mol / L solution of ferrous sulfate heptahydrate.

[0041] S4. Transfer the ferrous sulfate heptahydrate solution obtained in S3 to a three-necked flask, turn on the electric stirring device, feed high-purity nitrogen before and after the reaction to remove dissolved oxygen in water, and add the mixed solution configured in S2 dropwise to the flask. Stir continuou

[0044] A preparation method of calcium polysulfide sulfide zero-valent iron nanocomposite material is provided, comprising the steps of:

[0045] S1. Configure 3.6ml 29% calcium polysulfide solution;

[0046] S2. Weigh 10.2141g of sodium borohydride solid and dissolve it in 671.4ml of deionized water to prepare a 0.4mol / L sodium borohydride solution. Transfer the calcium polysulfide solution in S1 to the sodium borohydride solution and feed high-purity nitrogen gas Remove dissolved oxygen in water;

[0047] S3. Weigh 31.275g of ferrous sulfate heptahydrate and dissolve it in 225ml of deionized water to prepare a 0.5mol / L solution of ferrous sulfate heptahydrate.

[0048] S4. Transfer the ferrous sulfate heptahydrate solution obtained in S3 to a three-necked flask, turn on the electric stirring device, feed high-purity nitrogen before and after the reaction to remove dissolved oxygen in water, and add the mixed solution configured in S2 dropwise to the flask. Stir continuous