Process for recovering heavy metal ions in lead-acid storage battery sewage
A heavy metal ion, lead-acid battery technology, applied in the fields of magnetic field/electric field water/sewage treatment, water/sewage treatment, water/sewage multi-stage treatment, etc., can solve the problem of unstable treatment efficiency, long reaction period and large footprint And other issues
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preparation example Construction
[0048] The preparation method of the heavy metal adsorbent selected in the present invention is as follows:
[0049]1) Weigh 2.0g of nano-silica and disperse it in 160g of N-N dimethylamide, ultrasonicate at 200W for 30min at room temperature to obtain a dispersion, then add 10g of polyacrylonitrile into the dispersion, and heat it at 60°C Stir rapidly at 800r / min for 20h, and then obtain composite fiber precursors by electrospinning. The distance between the electrospinning needle tip and the receiving plate is 15cm, the voltage is 15kV, and the flow rate is stable at 0.5mm / min. Keep at 280°C for 2h in an air atmosphere, and then carbonize at 700°C for 30min in a nitrogen atmosphere to obtain composite carbon nanofibers;
[0050] 2) According to the ratio of 1:10g / mL, the composite carbon nanofibers were mixed with potassium permanganate solution with a concentration of 0.3mol / L, and the pH of the solution was adjusted to 2.0 with dilute nitric acid. Min was continuously sti...
Embodiment 1
[0053] A recovery process for heavy metal ions in lead-acid battery sewage, the specific process method is as follows:
[0054] The sewage generated in the production of lead-acid batteries is introduced into the oil-separating sedimentation tank. The oil-separating sedimentation tank adopts a flat flow structure, and the large particles in the sewage and the oil floating on the water surface are removed, and then the treated sewage is introduced into the treatment tank. In the process, heavy metal adsorbents are added to the treatment tank for sedimentation, and the content of heavy metal adsorbents is controlled to 2g / L, and the sedimentation time is controlled at 5min. During the sedimentation process, 30r / min stirring can be carried out, which can make the sewage in the sewage The heavy metal in the heavy metal is fully contacted with the heavy metal adsorbent, thereby accelerating the adsorption efficiency of the heavy metal adsorbent to the heavy metal in the sewage;
[...
Embodiment 2
[0067] A recovery process for heavy metal ions in lead-acid battery sewage, the specific process method is as follows:
[0068] The sewage generated in the production of lead-acid batteries is introduced into the oil-separating sedimentation tank. The oil-separating sedimentation tank adopts a flat flow structure, and the large particles in the sewage and the oil floating on the water surface are removed, and then the treated sewage is introduced into the treatment tank. In the process, heavy metal adsorbent is added to the treatment tank for sedimentation, and the content of heavy metal adsorbent is controlled to 5g / L, and the sedimentation time is controlled at 8min. During the sedimentation process, 50r / min stirring can be carried out, and the sewage can be made The heavy metal in the heavy metal is fully contacted with the heavy metal adsorbent, thereby accelerating the adsorption efficiency of the heavy metal adsorbent to the heavy metal in the sewage;
[0069] Take out t...
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