A kind of recycling method of copper-containing industrial waste liquid
A technology for industrial waste liquid and waste liquid, applied in chemical instruments and methods, multi-stage water/sewage treatment, water pollutants, etc., can solve the problems of heavy metal ions and fluorine elements that are difficult to meet the standards stably, expensive equipment, waste of resources, etc. Achieve effective organic matter removal effect, good purification treatment effect, and reduce treatment cost
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Embodiment 1
[0027] 1) Select the alkaline waste liquid and acidic copper-containing waste liquid produced in the printed circuit board preparation process as the original liquid for treatment and recovery, mix the two, adjust the pH value of the mixed waste liquid to 8.0, and then add flocculant for organic matter and Preliminary sedimentation treatment of copper precipitates; the flocculant is polyaluminum chloride and dimethyl diallyl ammonium chloride, the weight ratio of the two is about 2:1, relative to 1L of the waste liquid, it is added The amount is 0.08g; the primary sedimentation treatment is carried out under the condition of stirring at a temperature of 40°C;
[0028] 2) The waste liquid after the preliminary sedimentation treatment is left to stand and cooled to below 20° C., and then filtered through a filter with a mesh diameter of 50 μm to obtain a filtrate.
[0029] 3) adopting the acidic solution containing 45% sulfuric acid and 10% ferrous sulfate to continue to adjust ...
Embodiment 7
[0034] The particle size of activated carbon in step 3) in Example 7 was 150 μm, and activated carbon was not used in step 3) in Example 8.
Embodiment 9
[0035] In Example 9, the polyaluminum chloride in step 3) was replaced with dimethyl diallyl ammonium chloride.
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