A kind of method utilizing SDS roasting to produce modified bentonite adsorbent
A bentonite and adsorbent technology, which is applied in the field of preparation of modified bentonite, can solve the problems affecting the filtering effect and a large number of air bubbles, and achieve the effect of obvious removal effect, simple operation method, convenient and feasible production process
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Embodiment 1
[0020] Take sodium-based bentonite and place it in a crucible, and bake it in a muffle furnace at different high temperatures (200°C, 300°C, 400°C, 450°C, 500°C, 550°C, 600°C, 700°C, 800°C) for 2 hours, and put it in a drying tank Cool in medium. Measure 100mL of distilled water and pour it into a corked conical flask, weigh the roasted bentonite into the above corked conical flask, then add SDS with a mass ratio of 1:10 to bentonite, and shake for 2 hours. After the reaction, filter, wash the filter cake 5 times, place the obtained filter cake in a ventilated place to air-dry naturally, grind it into powder, and pass through a 200-mesh sieve to obtain the modified bentonite adsorbent.
[0021] The modified bentonite adsorbent obtained in Example 1 is used to fix the zinc in the tailings, and the calculation formula of the fixation rate R is as follows:
[0022] R = 100 ( Z ...
Embodiment 2
[0026] Take sodium-based bentonite and place it in a crucible, bake it in a muffle furnace at 300°C for 2 hours, and cool it in a dry jar. Measure 100mL of distilled water and pour it into a stoppered conical flask, weigh the roasted bentonite in the above-mentioned conical flask with a stopper, and then add 0.5%, 1%, 2%, 3%, 5% and 8% of the mass of bentonite respectively , 10%, 15%, 20% SDS, shaking reaction for 2 hours. After the reaction, filter, wash the filter cake 5 times, place the obtained filter cake in a ventilated place to air-dry naturally, grind it into powder, and pass through a 200-mesh sieve to obtain the modified bentonite adsorbent.
[0027] The modified bentonite adsorbent obtained in Example 2 is used to fix the zinc in the tailings, and the measurement results are as follows: figure 2 shown. from figure 2 It can be seen that when the mass ratio of SDS to bentonite is 1:10-3:20, the modified bentonite adsorbent can significantly improve the fixation r...
Embodiment 3
[0029] Take sodium-based bentonite and place it in a crucible, bake it in a muffle furnace at 300°C for 2 hours, and cool it in a dry jar. Add SDS according to the mass ratio of SDS to bentonite as 1:10, shake and react for 2 hours. After the reaction is finished, filter, wash the filter cake 5 times, place the obtained filter cake in a ventilated place to air-dry naturally, grind it into powder, and pass through a 200-mesh sieve to obtain the modified bentonite adsorbent of the present invention.
[0030] Taking the bentonite adsorbent before modification as a contrast, the modified bentonite adsorbent obtained in Example 3 was used to fix zinc in the tailings, and the zinc in the tailings was fixed under different dosages, different pH values, and different temperatures. The zinc was fixed, and the determination results were as follows: image 3 , Figure 4 with Figure 5 shown. At the same time, the dosage is 1.5g, the pH is 4.0, and the samples of different leaching ti...
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