Preparation method for Canna biological carbon capable of simultaneously adsorbing ammonia nitrogen and cadmium
A canna and biochar technology, applied in chemical instruments and methods, adsorption water/sewage treatment, water pollutants, etc., can solve the problems of low adsorption efficiency, secondary pollution cost, etc., and avoid the use of organic alkoxides, The effect of preventing secondary pollution and complicated operation steps
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Embodiment 1
[0046] Embodiment 1, the preparation method of canna biochar:
[0047] Put the harvested cannas in a ventilated environment to dry naturally for a week (moisture content is 15% to 20%), chop them up, grind them into powders with a particle size of ≤10mm, put them in an oven and dry them at 105°C for three hours; Then put it into a carbonization furnace and pass nitrogen gas to carry out high-temperature carbonization. The heating rate is 5°C / min, and the temperature is raised to 500°C, kept for two hours, and cooled to room temperature. Take out and pulverize through a 60-100 mesh sieve to obtain biomass charcoal powder---canna biochar.
[0048] The biomass charcoal powder produced by the present embodiment --- canna biochar (BC500) is as shown in Table 1, the yield is 39.58%, and its specific surface area is 7.034m 2 / g, the pore volume is 0.0283cc / g, the pore diameter is 1.689nm, the micropores are fully developed, and the porosity is good; its pH is 10.1, and it can be used...
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