Treatment method of chemical nickel wastewater
A treatment method and chemical nickel technology, applied in the fields of metallurgical wastewater treatment, chemical instruments and methods, water/sewage treatment, etc., to achieve the effect of simple treatment method, improved removal effect, and high environmental friendliness
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Embodiment 1
[0038] Take 50mL electroplating nickel-containing wastewater in a beaker, stir and react in a constant temperature magnetic stirring water bath, the rotation speed is 500 rpm, the temperature is set at 25°C, the pH value of the wastewater is adjusted to 5-6, and 10.7g of 30% H 2 o 2 Solution (H 2 o 2 content is about 3.2g), reacted for 40min, then adjusted the pH value of the wastewater to 6-8, and added 4-amino-3-mercapto-1,2,4-triazole and dimethyl di For the mixed agent of sodium thioformate, the amount of the added mixed agent is twice the amount of the total nickel in the wastewater, reacted for 40 minutes; then added 0.05g polyacrylamide to the reaction system, reacted for 1.5h and carried out solid-liquid separate. The nickel content of the water sample measured by ICP-OES (Inductively Coupled Plasma Optical Emission Spectrometer) was 0.085 mg / L. The obtained chelated precipitate was dried and roasted at a constant temperature of 500°C for 1.5 hours to obtain nickel...
Embodiment 2
[0040] Take 50mL electroplating nickel-containing wastewater in a beaker, stir and react in a constant temperature magnetic stirring water bath, the rotation speed is 700 rpm, the temperature is set at 25°C, the pH value of the wastewater is adjusted to 5-6, and 16g of 30% H 2 o 2 solution, reacted for 40min, then adjusted the pH value of the wastewater to 6-8, and added 4-amino-3-mercapto-1,2,4-triazole and potassium dimethyldithioformate at a molar ratio of 2:1 Mixed medicament, the amount of the added mixed medicament is 2.5 times the amount of the total nickel in the waste water, react for 20 minutes; then add 0.1g sodium polyacrylate to the reaction system, react for 1 hour and then carry out solid-liquid separation. The nickel in the water sample measured by ICP-OES was 0.094mg / L. The obtained chelated precipitate was dried and roasted at a constant temperature of 600° C. for 1 hour to obtain nickel slag with a nickel purity of 61% (calculated as nickel sulfide, the pur...
Embodiment 3
[0042] Take 50mL electroplating nickel-containing wastewater in a beaker, stir and react in a constant temperature magnetic stirring water bath, the rotation speed is 600 rpm, the temperature is set at 25°C, the pH value of the wastewater is adjusted to 5-6, and 12g of 30% H 2 o 2 Solution, react for 30min, then adjust the pH value of the wastewater to 6~8, add a mixture of 4-amino-3-mercapto-1,2,4-triazole and sodium dimethyldithioformate with a molar ratio of 1.5:1 Agent, the amount of mixed agent added is 2.2 times the amount of total nickel in the wastewater, react for 30min; then add 0.08g sodium styrene sulfonate to the reaction system, react for 1.2h and then carry out solid-liquid separation. The nickel in the water sample was measured by ICP-OES to be 0.079mg / L. The obtained chelated precipitate is dried and roasted at a constant temperature of 500°C for 1 hour to obtain nickel slag with a nickel purity of 60% (calculated as nickel sulfide, the purity is above 95%). ...
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