Method for removing heavy metals in soil or plants by using triethylamine hydrogen sulfate ionic liquid
A technology of triethylamine hydrogen sulfate and ionic liquid, which is applied in the restoration of polluted soil and other directions, can solve the problems of low moisture tolerance, low thermal stability, high price, etc., and achieves cost control, simple process, and easy operation conditions. control effect
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Embodiment 1
[0021] A method utilizing triethylamine bisulfate ionic liquid ([TEA][HSO ]) to remove heavy metals in soil, the steps are as follows:
[0022] (1) Preparation of ionic liquid
[0023] In a constant low temperature (4°C) ice-water bath, 150 mL of 5M concentrated sulfuric acid solution (95.0-98.0 wt.%) was slowly added to 104.5 mL of triethylamine solution (99 wt.%). After mixing, continue to stand at the same temperature for thirty minutes;
[0024] (2) Rotary evaporation
[0025] Put the clarified solution obtained in step (1) into a rotary evaporator until the moisture and excess amine are completely sublimated and escaped;
[0026] In particular, after the mixing reaction is complete, the solution is placed in a rotary evaporator at a temperature of 80°C and a rotation speed of 200r / min for 10 hours, until the excess water and amine are evaporated and escaped.
[0027] (3) Medium temperature solid-liquid reaction
[0028] After washing the heavy metal contaminated soil,...
Embodiment 2
[0031] A method utilizing triethylamine bisulfate ionic liquid ([TEA][HSO ]) to remove heavy metals in soil, the steps are as follows:
[0032] (1) Preparation of ionic liquid
[0033] In a constant low temperature (4°C) ice-water bath, 150 mL of 5M concentrated sulfuric acid solution (95.0-98.0 wt.%) was slowly added to 104.5 mL of triethylamine solution (99 wt.%). After mixing, continue to stand at the same temperature for thirty minutes;
[0034] (2) Rotary evaporation
[0035] Put the clarified solution obtained in step (1) into a rotary evaporator until the moisture and excess amine are completely sublimated and escaped;
[0036] In particular, after the mixing reaction is complete, the solution is placed in a rotary evaporator at a temperature of 85°C and a rotation speed of 100r / min for 12 hours until excess water and amine are evaporated and escaped.
[0037] (3) Medium temperature solid-liquid reaction
[0038] After washing the heavy metal contaminated soil, grin...
Embodiment 3
[0041] A method utilizing triethylamine hydrogen sulfate ionic liquid ([TEA][HSO ]) to remove heavy metals in plants, the steps are as follows:
[0042] (1) Preparation of ionic liquid
[0043] In a constant low temperature (4°C) ice-water bath, 150ml of 5M concentrated sulfuric acid solution (95.0-98.0wt.%) was slowly added to 104.5ml of triethylamine solution (99wt.%). After mixing, continue to stand at the same temperature for thirty minutes;
[0044] (2) Rotary evaporation
[0045] Put the clarified solution obtained in step (1) into a rotary evaporator until the moisture and excess amine are completely sublimated and escaped;
[0046] In particular, after the mixing reaction is complete, the solution is placed in a rotary evaporator at a temperature of 80°C and a rotation speed of 200r / min for 10 hours, until the excess water and amine are evaporated and escaped.
[0047] (3) Medium temperature solid-liquid reaction
[0048] Wash the plants (willow branches and leaves) ...
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