Modified slag adsorbent for anionic dye wastewater treatment and preparation method thereof
An anionic dye and adsorbent technology, which is applied in textile industry wastewater treatment, adsorption water/sewage treatment, water/sludge/sewage treatment, etc., can solve problems such as polluting the environment, affecting crop growth, and endangering human health. The effect of large amount, short adsorption equilibrium time, and low price
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Embodiment 1
[0030] A modified slag adsorbent for anionic dye wastewater treatment, prepared by the following method:
[0031] (1) Slag pretreatment: wash the slag with distilled water to remove impurities, dry it at 100°C for 3 hours, pulverize it with a pulverizer, sieve it with a 250-mesh screen, and set aside;
[0032] (2) Preparation of solution: sodium chloride is made into sodium chloride solution, then 4mol / L hydrochloric acid is mixed with 1mol / L sodium chloride solution to obtain a mixed solution, and the concentration of hydrochloric acid in the mixed solution is 3.5mol / L L, the concentration of sodium chloride is 0.1mol / L;
[0033] (3) Modified slag: Slowly add 90mL of the mixed solution in step (2) to 30g of the slag in step (1), stir for 2h (the rotating speed of stirring is 500r / min), let stand for 15h, and place at 100 ℃ drying oven for 2 hours, and ground to obtain the modified slag adsorbent.
[0034] The specific surface area of slag before modification is 51.3m 2 / ...
Embodiment 2
[0037] A modified slag adsorbent for anionic dye wastewater treatment, prepared by the following method:
[0038] (1) Slag pretreatment: wash the slag with distilled water to remove impurities, dry it at 80°C for 5 hours, pulverize it with a pulverizer, sieve it with a 250-mesh screen, and set aside;
[0039] (2) Preparation of solution: sodium chloride is made into sodium chloride solution, then 8mol / L hydrochloric acid is mixed with 1mol / L sodium chloride solution to obtain a mixed solution, and the concentration of hydrochloric acid in the mixed solution is 6mol / L , the concentration of sodium chloride is 0.1mol / L;
[0040] (3) Modified slag: Slowly add 90mL of the mixed solution in step (2) to 30g of slag in step (1), stir for 1h (rotation speed: 500r / min), let stand for 12h, and dry at 120°C Dry in the box for 3 hours, and grind to obtain the modified slag adsorbent.
[0041] The specific surface area of slag before modification is 51.3m 2 / g, the porosity of slag be...
Embodiment 3
[0044] A modified slag adsorbent for anionic dye wastewater treatment, prepared by the following method:
[0045] (1) Slag pretreatment: wash the slag with distilled water to remove impurities, dry it at 120°C for 2 hours, pulverize it with a pulverizer, sieve it with a 250-mesh screen, and set aside;
[0046] (2) Preparation of solution: sodium chloride is made into sodium chloride solution, then 6mol / L hydrochloric acid is mixed with 1mol / L sodium chloride solution to obtain a mixed solution, and the concentration of hydrochloric acid in the mixed solution is 2.5mol / L L, the concentration of sodium chloride is 0.1mol / L;
[0047] (3) Modified slag: Slowly add 90mL of the mixed solution in step (2) to the slag in 30g of step (1), stir for 5h (the rotating speed of stirring is 500r / min), let stand for 20h, and place at 80 ℃ in a drying oven for 3 hours, and ground to obtain a modified slag adsorbent.
[0048] The specific surface area of slag before modification is 51.3m 2...
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