Preparation method of high-performance bamboo leaf matter carbonized Cr adsorbent
An adsorbent, high-performance technology, applied in chemical instruments and methods, adsorbed water/sewage treatment, inorganic chemistry, etc., can solve the problems of adsorption and defluorination materials that have not been reported, achieve obvious economic and environmental benefits, adsorption selection The effect of enhancing the property and facilitating the separation of solid and liquid
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Embodiment 1
[0019] (1) Remove the tip and base of fresh bamboo leaves, leaving thin bamboo leaves, wash the bamboo leaves, dry the surface moisture, cut into rectangular slices with a side length of 0.9cm, and bake at 90°C for 30 minutes;
[0020] (2) Carbonize the dried rectangular slices of bamboo leaves in a muffle furnace at 260°C for 60 minutes, soak the carbonized product in distilled water at 80°C for 1 hour, rinse with distilled water until the eluent is clear, and dry in an oven at 60°C To constant weight, obtain the precursor A of high-performance bamboo leaf quality carbonized Cr adsorbent;
[0021] (3) Completely immerse the obtained A in an aqueous solution of perchloric acid with a mass fraction of 70%. The liquid level of the perchloric acid solution is at least 1cm higher than that of A. After soaking for 30 minutes, transfer A and the soaking solution into high-pressure hydrothermal reaction. In the kettle, heat at 65°C for 10h;
[0022] (4) After the high-pressure hydro...
Embodiment 2
[0026] (1) Remove the tip and base of the fresh bamboo leaves, leaving thin bamboo leaves, wash the bamboo leaves, dry the surface moisture, cut into rectangular slices with a side length of 1.0cm, and bake at 100°C for 60 minutes;
[0027] (2) Carbonize the dried rectangular slices of bamboo leaves in a muffle furnace at 260°C for 45min, soak the carbonized product in distilled water at 90°C for 1h, rinse with distilled water until the eluent is clear, and dry in an oven at 60°C To constant weight, obtain the precursor A of high-performance bamboo leaf quality carbonized Cr adsorbent;
[0028] (3) Completely immerse the obtained A in an aqueous solution of perchloric acid with a mass fraction of 72%. The liquid level of the perchloric acid solution is at least 1cm higher than that of A. After soaking for 20 minutes, transfer A and the soaking solution into high-pressure hydrothermal reaction In the kettle, heat at 70°C for 12h;
[0029] (4) After the high-pressure hydrotherm...
Embodiment 3
[0033] (1) Remove the tip and base of the fresh bamboo leaves, leaving thin bamboo leaves, wash the bamboo leaves, dry the surface moisture, cut into rectangular slices with a side length of 1.1cm, and bake at 110°C for 45 minutes;
[0034] (2) Carbonize the dried rectangular slices of bamboo leaves in a muffle furnace at 260°C for 30 minutes, soak the carbonized product in distilled water at 85°C for 1 hour, rinse with distilled water until the eluent is clear, and dry in an oven at 60°C To constant weight, obtain the precursor A of high-performance bamboo leaf quality carbonized Cr adsorbent;
[0035] (3) Completely immerse the obtained A in an aqueous solution of perchloric acid with a mass fraction of 71%. The liquid level of the perchloric acid solution is at least 1cm higher than that of A. After soaking for 10 minutes, transfer A and the soaking solution into high-pressure hydrothermal reaction. In the kettle, heat at 60°C for 8h;
[0036] (4) After the high-pressure h...
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