Novel reclamation method of electroplating sludge
A technology for electroplating sludge and recycling, which is applied in chemical instruments and methods, sludge treatment, water/sludge/sewage treatment, etc. It can solve the problems of complex reaction conditions, high energy consumption, secondary pollution, etc. High efficiency, high stability, convenient recovery and separation
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Embodiment 1
[0024] Preparation of activated rice husk: agricultural waste rice husk is soaked in sodium hydroxide with a mass concentration of 2.5%, boiled for 15 minutes, filtered out, washed with water until neutral, and dried at 60°C.
[0025] Preparation of porous loaded ferrite magnets:
[0026] (1) chopping the bulk solid of heavy metal sludge with machinery, the sludge of agglomerate is cut into small particles, and the measured average particle diameter is 5mm;
[0027] (2) Take 100g of electroplating sludge from Wuxi Hazardous Waste Treatment Center. The sludge parameters are: moisture content 70.0%, main metal element composition: Cr 6.62%, Fe 4.35%, Ni 6.54%, Cu 16.88%, Zn 4.56%, Converted into moles, Fe(II) is 0.078mol, Cr(III) is 0.127mol, and other divalent metals are 0.445mol. According to the heavy metal-containing sludge and water mass ratio of 1:4, add 400 g of water to the reactor, stir for 30 minutes, and form a uniform slurry;
[0028] (3) Add 1.13mol FeSO to the mu...
Embodiment 2
[0033] Preparation of activated rice husk: agricultural waste rice husk is soaked in sodium hydroxide with a mass concentration of 2.5%, boiled for 15 minutes, filtered out, washed with water until neutral, and dried at 60°C.
[0034] Preparation of porous loaded ferrite magnets:
[0035](1) chopping the bulk solid of heavy metal sludge with machinery, the sludge of agglomerate is cut into small particles, and the measured average particle diameter is 5mm;
[0036] (2) Take 100g of electroplating sludge from Wuxi Hazardous Waste Treatment Center. The sludge parameters are: moisture content 70.0%, main metal element composition: Cr 6.62%, Fe 4.35%, Ni 6.54%, Cu 16.88%, Zn 4.56%, Converted into moles, Fe(II) is 0.078mol, Cr(III) is 0.127mol, and other divalent metals are 0.445mol. According to the heavy metal-containing sludge and water mass ratio of 1:5, add 500 g of water to the reactor, stir for 30 minutes, and form a uniform slurry;
[0037] (3) Add 1.575mol FeSO to the mu...
Embodiment 3
[0042] Preparation of activated rice husk: agricultural waste rice husk is soaked in sodium hydroxide with a mass concentration of 2.5%, boiled for 15 minutes, filtered out, washed with water until neutral, and dried at 60°C.
[0043] Preparation of porous loaded ferrite magnets:
[0044] (1) chop the bulk solid of heavy metal sludge with machinery, cut the sludge of agglomerate into small particles, and record an average particle diameter of 9 mm;
[0045] (2) Take 100g of electroplating sludge from Wuxi Hazardous Waste Treatment Center. The sludge parameters are: moisture content 70.0%, main metal element composition: Cr 6.62%, Fe 4.35%, Ni 6.54%, Cu 16.88%, Zn 4.56%, Converted into moles, Fe(II) is 0.078mol, Cr(III) is 0.127mol, and other divalent metals are 0.445mol. According to the heavy metal-containing sludge and water mass ratio of 1:6, add 600 g of water to the reactor, stir for 30 minutes, and form a uniform slurry;
[0046] (3) Add 2.02mol FeSO to the mud formed ...
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