A kind of domestic sewage sludge/rectorite composite and its preparation method and application
A technology of domestic sewage and rectorite, applied in water/sludge/sewage treatment, water pollutants, water/sewage treatment, etc., to achieve the effect of increasing adsorption, increasing adsorption capacity, and simple preparation method
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Embodiment 1
[0027] A preparation method of domestic sewage sludge / rectorite composite, comprising the steps of:
[0028] (1) Firstly, the domestic sewage sludge is centrifugally dehydrated at a speed of 5000r / min, and the dehydrated sludge is dried in an oven at 60°C to a constant weight, and then impurities are removed, crushed, passed through a 60-mesh sieve, and set aside;
[0029] (2) Wash the rectorite 4 times with deionized water and ethanol respectively, and then place it in an oven for drying at 60°C for later use;
[0030] (3) Take 1.5 g of rectorite from step (2) and place it in a beaker filled with 50 mL of deionized water, ultrasonically disperse it for 30 min, then add 0.5 g of the sludge from step (1), and then stir at 25°C for 2 h, Suction filtration, drying at 60°C;
[0031] (4) Put the dried sludge in step (3) into the tube furnace and heat it at 70mL min -1 The flow rate of nitrogen was passed through for 30min, and then at 5°C·min -1 The temperature was raised to 400...
Embodiment 2
[0040] A preparation method of domestic sewage sludge / rectorite composite, comprising the steps of:
[0041] (1) Firstly, the domestic sewage sludge is centrifugally dehydrated at a speed of 5000r / min, and the dehydrated sludge is dried in an oven at 60°C to a constant weight, and then impurities are removed, crushed, passed through a 60-mesh sieve, and set aside;
[0042] (2) Wash the rectorite 4 times with deionized water and ethanol respectively, and then place it in an oven for drying at 60°C for later use;
[0043] (3) Take 1.5 g of rectorite from step (2) and place it in a beaker filled with 50 mL of deionized water, ultrasonically disperse it for 30 min, then add 1.5 g of the sludge from step (1), and then stir at 25°C for 2 h, Suction filtration, drying at 60°C;
[0044] (4) Put the dried sludge in step (3) into the tube furnace and heat it at 60mL min -1 The flow rate of nitrogen was passed through for 30min, and then at 5°C·min -1 The temperature was raised to 400...
Embodiment 3
[0047] A preparation method of domestic sewage sludge / rectorite composite, comprising the steps of:
[0048] (1) Firstly, the domestic sewage sludge is centrifugally dehydrated at a speed of 5000r / min, and the dehydrated sludge is dried in an oven at 60°C to a constant weight, and then impurities are removed, crushed, passed through a 60-mesh sieve, and set aside;
[0049] (2) Wash the rectorite 4 times with deionized water and ethanol respectively, and then place it in an oven for drying at 60°C for later use;
[0050] (3) Take 2.5 g of rectorite from step (2) and place it in a beaker filled with 50 mL of deionized water, ultrasonically disperse it for 30 min, then add 0.5 g of the sludge from step (1), and then stir for 2 h at 25 ° C. Suction filtration, drying at 60°C;
[0051] (4) Put the dried sludge in step (3) into the tube furnace and heat it at 70mL min -1 The flow rate of nitrogen was passed through for 30min, and then at 5°C·min -1 The temperature was raised to 4...
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