Application of titanium trichloride and treatment method of rhenium-containing wastewater
A technology of titanium trichloride and treatment method, applied in water/sewage treatment, chemical instruments and methods, water/sludge/sewage treatment, etc., can solve problems such as unsatisfactory perrhenate removal effect and complicated process , to achieve the effect of good work, simple operation and large size
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Embodiment 1
[0042] A treatment method for rhenium-containing wastewater, comprising the following steps:
[0043] S1. At room temperature, place a 250mL beaker on a programmable coagulation and stirring test machine, and add 200mL of waste water containing ammonium perrhenate, wherein, in the waste water, the concentration of ammonium perrhenate is about 54 μmol / L, high The concentration of rhenate ions is about 10mg / L, then directly add titanium trichloride solution, and add 0.1mol / L sodium hydroxide solution to adjust the pH value of the wastewater to 6.2;
[0044] S2. In the wastewater after pH adjustment, the molar ratio of titanium trichloride to perrhenate ions is 25:1, then start the coagulation test mixer, and stir in two stages, the first stage is at a rate of 250rpm / min Stir for 1min, and stir for 5min at a rate of 40rpm / min in the second stage. Stir in two stages, which can be directly preset on the coagulation test mixer, and then stir according to the preset coagulation progr...
Embodiment 2
[0046] In the present embodiment, the influence of the molar ratio of different titanium trichloride and perrhenate ions on the removal rate of perrhenate ions is studied, specifically including the following steps:
[0047] S1. At room temperature, take five 250mL beakers and place them on the programmable coagulation stirring tester in turn, and add 200mL of waste water containing ammonium perrhenate, wherein the concentration of ammonium perrhenate in the waste water is about 54μmol / L, the concentration of perrhenate ion is about 10mg / L, then directly add titanium trichloride solution, and add 0.1mol / L sodium hydroxide solution to adjust the pH value of wastewater to 6.2;
[0048] S2, in the wastewater after pH adjustment, the molar ratios of titanium trichloride and perrhenate ions are 30:1, 20:1, 15:1, 10:1 or 5:1 respectively, and then start the coagulation test mixer , stirred in two stages, the first stage was stirred at a rate of 250rpm / min for 1min, and the second st...
Embodiment 3
[0050] In this embodiment, in Example 1 and Example 2, under the condition of different molar ratios of titanium trichloride and perrhenate ions, the removal rate of perrhenate in the solution sample at 2 cm from the liquid surface increases with the second Phase changes in coagulation time.
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