A kind of mulberry biochar adsorbent based on black and odorous water treatment and preparation method thereof
A biochar and adsorbent technology, applied in the field of mulberry biochar adsorbent and its preparation, can solve the problems of pores, specific surface area and adsorption effect difference, and achieve the effect of low price, many adsorption sites, and rapid preparation
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Embodiment 1
[0020] The mulberry biochar adsorbent of the present invention is used to treat phosphorus in waste water, comprising the following steps:
[0021] (1) Pick the leaves of the mulberry tree, rinse the picked mulberry leaves with distilled water, put them in a dry and ventilated place to dry, and then put the dried mulberry leaves in an oven at 70 ℃ until the mulberry leaves are completely dehydrated. The mulberry leaves are put into a pulverizer and ground into powder, and finally the mulberry powder is screened through a sieve and bagged for later use;
[0022] (2) Put the screened mulberry powder described in step (1) into the slots of the tube furnace, open the nitrogen valve, and continuously feed nitrogen into the tube furnace until the air in the tube furnace is completely Empty, heat the inside of the tube to 500 °C at a temperature increase of 7 °C per minute, heat at a constant temperature for 2 hours, and then start to cool down, so that the temperature inside the tub...
Embodiment 2
[0024] The mulberry biochar adsorbent of the present invention is used to adsorb and treat phosphorus in waste water, comprising the following steps:
[0025] Take 20 mL of phosphorus solution with an initial concentration of 5, 10, 20, 50, 80, 120, and 200 mg / L, adjust the pH of the solution to 11, and select 0.1 g of mulberry biochar adsorbent fired at 500 °C Add each solution separately, set the temperature of the shaker at 25°C, shake the solution for 4 h, take a certain amount of solution and filter it, and measure the phosphorus content in the solution. The calculated adsorption results are shown in Table 1:
[0026] Table 1: Different K 2 HPO 3 The adsorption capacity of adsorbent for phosphorus under the condition of initial concentration
[0027]
[0028] It can be seen from Table 1 that the adsorbent has an adsorption capacity of 0.83 mg / g when the initial concentration is 5 mg / L, and it increases with the increase of the initial concentration. When the initial ...
Embodiment 3
[0030] The mulberry biochar adsorbent of the present invention is used to adsorb and treat phosphorus in waste water, comprising the following steps:
[0031] Take 20 mL of phosphorus solution with an initial concentration of 50 mg / L, adjust the pH to 2, 3, 4, 5, 6, 7, 8, 9, 10, and 11, and select the mulberry biochar fired at 500 °C Add 0.1 g of adsorbent to each solution respectively, set the temperature of the shaker at 25 °C, shake the solution for 4 h, take a certain amount of solution and filter it, and then measure the phosphorus content in the solution. The calculated adsorption results are shown in Table 2:
[0032] Table 2: Phosphorus adsorption capacity of adsorbents under different pH conditions
[0033] pH 2 3 4 5 6 7 8 9 10 11 Adsorption capacity (mg / g) -7.64 1.98 6.00 6.06 6.21 6.70 6.68 6.96 6.77 7.25
[0034] It can be seen from Table 2 that the adsorbent will release a part of the phosphorus contained in itself under th...
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