Method for synthesizing iron modified bentonite
A technology of bentonite and synthetic iron, which is applied in the field of environmental pollution control, can solve the problems of insufficient exchange of iron-modified bentonite, and achieve the effect of complete modification, high quality and uniform product
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Embodiment 1
[0017] Concentration of 0.8mol / L Fe(NO 3 ) 3 The solution was stirred in a water bath at 65°C, and Na at a concentration of 2 mol / L was added dropwise to the solution at the same time 2 CO 3 solution, the resulting OH - The relationship between the molar concentration and the molar concentration of iron ions is: OH - :Fe 3+ =1:1.2, after the dropwise addition, continue to stir for 4 hours in a water bath at 65°C, and then age for 48 hours to obtain a hydroxyl iron pillar solution;
[0018] The anode electrode and the cathode electrode of the electrolytic cell are both graphite electrodes. The cathode and the anode are separated by a microporous filter membrane. Water and ions can pass through, but solid particles cannot pass through. Pour deionized water into the anode area, the volume ratio of deionized water and hydroxyl iron pillaring liquid is 1:10, and then add dry bentonite crushed through a 100 mesh sieve in the anode area, the solid-to-liquid ratio of bentonite an...
Embodiment 2
[0022] FeCl with a concentration of 0.4mol / L 3 The solution was stirred in a water bath at 60°C, and Na at a concentration of 1 mol / L was added dropwise to the solution at the same time. 2 CO 3 solution, the resulting OH - The relationship between the molar concentration and the molar concentration of iron ions is: OH - :Fe 3+ =1:1, after the dropwise addition, continue to stir in a water bath at 60°C for 2 hours, then age for 24 hours to obtain a hydroxyl iron pillar solution;
[0023] The anode electrode and the cathode electrode of the electrolytic cell are both graphite electrodes. The cathode and the anode are separated by a microporous filter membrane. Water and ions can pass through, but solid particles cannot pass through. Pour deionized water into the anode area, the volume ratio of deionized water and hydroxyl iron pillaring liquid is 1:5, and then add dry bentonite crushed through a 50 mesh sieve in the anode area, the solid-to-liquid ratio of bentonite and hydr...
Embodiment 3
[0027] Concentration of 0.8mol / L Fe(NO 3 ) 3 The solution was stirred in a water bath at 65°C, and Na at a concentration of 1 mol / L was added dropwise to the solution at the same time. 2 CO 3 solution, the resulting OH - The relationship between the molar concentration and the molar concentration of iron ions is: OH - :Fe 3+ =1:1, after the dropwise addition, continue to stir for 2 hours in a water bath at 65°C, and then age for 24 hours to obtain a hydroxyl iron pillar solution;
[0028] The anode electrode and the cathode electrode of the electrolytic cell are both graphite electrodes. The cathode and the anode are separated by a microporous filter membrane. Water and ions can pass through, but solid particles cannot pass through. Pour deionized water into the anode area, the volume ratio of deionized water and hydroxyl iron pillaring liquid is 1:5, and then add dry bentonite crushed through a 100 mesh sieve in the anode area, the solid-to-liquid ratio of bentonite and ...
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