Polythiocarbonate-containing wastewater treatment agent, application thereof and wastewater treatment method
A polythiocarbonate, wastewater treatment agent technology, applied in water/sewage treatment, chemical instruments and methods, water/sewage multi-stage treatment, etc., can solve the problem of high dosage and cost, insufficient research on compound applications, etc. question
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[0025] The preparation method of the wastewater treatment agent of the present invention is not particularly limited, as long as the above components are mixed. In order to make the compounding effect of different medicaments better, preferably, water may also be added during the mixing process. The amount of water added is not particularly limited, and it is based on the fact that it is more favorable for the mixing of polythiocarbonate, water-soluble chitosan and / or its derivatives, and trimercaptotriazine compound. That is, preferably, the polythiocarbonate-containing wastewater treatment agent may also contain water, preferably, based on the total amount of the wastewater treatment agent, the content of the water is 10-50% by weight.
[0026] The second aspect of the present invention provides the application of the above polythiocarbonate-containing wastewater treatment agent in the treatment of heavy metal-containing wastewater.
[0027] A third aspect of the present in...
Embodiment approach
[0038] According to a specific embodiment of the present invention, step (1) includes adding a wastewater treatment agent into the wastewater containing heavy metals, stirring, and then performing the contacting.
[0039] The present invention has no special limitation on the contacting conditions of the step (2), so as to satisfy the complete reaction between the mixture obtained in the step (1) and the polyacrylamide. Preferably, the contacting conditions in step (2) include: a temperature of 20-40° C. and a time of 5-60 minutes.
[0040] According to a specific embodiment of the present invention, the step (2) includes adding polyacrylamide into the mixture obtained in the contacting step (1), stirring, and then performing the contacting.
[0041] According to a preferred embodiment of the present invention, the weight ratio of the heavy metal-containing wastewater to the wastewater treatment agent in terms of heavy metals is 1:(4-16), more preferably 1:(5-13).
[0042] Acco...
Embodiment 1
[0056] Take by weighing 15g sodium trithiocarbonate, 9g chitosan and 45g trisodium trimercaptotriazine, the ratio of the three is 1:0.6:3, then add 31g water and mix to obtain wastewater treatment agent, the content of water is 31% by weight %.
[0057] (1) Use 15% by weight of sodium hydroxide solution to adjust the pH value of the wastewater to 9, take 1L of wastewater, add 160 mg of the above-mentioned wastewater treatment agent, stir, and then contact for 8 minutes;
[0058] (2) Add polyacrylamide to the mixture obtained in step (1), stir, and then contact for 30 minutes. The concentration of polyacrylamide is 1.5 mg / L, and stand for 30 minutes.
[0059] The supernatant was taken to measure the heavy metal content and turbidity in the water, and the results are listed in Table 2.
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