Magnetic lanthanum-loaded attapulgite clay dephosphorization adsorbent as well as preparation and application methods thereof
A technology of attapulgite clay and phosphorus adsorbent, which is applied in chemical instruments and methods, separation methods, adsorbed water/sewage treatment, etc. High rate, low environmental impact, and the effect of recycling
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[0021] Example 1
[0022] This embodiment provides a magnetic lanthanum-loaded attapulgite clay phosphorus removal adsorbent, the phosphorus removal adsorbent includes an attapulgite clay carrier on which lanthanum and ferric tetroxide are supported. The preparation method of the magnetic lanthanum-loaded attapulgite clay phosphorus removal adsorbent described in this embodiment includes the following steps:
[0023] (1) The attapulgite clay was calcined at 400 °C for 2 h to obtain the attapulgite clay carrier.
[0024] (2) Pour 100ml of deionized water into a 250mL three-necked flask, add 3.0g of the attapulgite clay carrier calcined in step (1); stir under the protection of nitrogen atmosphere, add 2.78g FeSO 4 ·7H 2 O and 3.25g FeCl 3 After stirring for 15min, FeSO 4 ·7H 2 O and FeCl 3 The ratio of the amount of substances is 1:2.
[0025] (3) 40 mL of ammonia water with a mass concentration of 25 wt % was rapidly added to the three-necked flask, and the reaction was...
Example Embodiment
[0029] Example 2
[0030] This embodiment provides a magnetic lanthanum-loaded attapulgite clay phosphorus removal adsorbent, the phosphorus removal adsorbent includes an attapulgite clay carrier on which lanthanum and ferric tetroxide are supported. The preparation method of the magnetic lanthanum-loaded attapulgite clay phosphorus removal adsorbent described in this embodiment includes the following steps:
[0031] (1) The attapulgite clay was calcined at 500 ℃ for 3 h to obtain the attapulgite clay carrier.
[0032] (2) Pour 100ml of deionized water into a 250mL three-necked flask, add 3.5g of the attapulgite clay carrier calcined in step (1); stir under the protection of nitrogen atmosphere, add 3.34g FeSO 4 ·7H 2 O and 4.86g FeCl 3 After stirring for 15 min, FeSO 4 ·7H 2 O and FeCl 3 The ratio of the amount of substances is 1:2.5.
[0033] (3) 40 mL of ammonia water with a mass concentration of 28 wt % was rapidly added to the three-necked flask, and the reaction was...
Example Embodiment
[0038] Experimental example
[0039] Phosphorus removal ability test experiment
[0040] The phosphate solution was configured, using the La-ATP@Fe prepared in the above Example 1-2 3 O 4 Adsorption experiments were carried out on the adsorbent, and the conclusions were as follows:
[0041] (1) La-ATP@Fe prepared in above-mentioned Example 1-2 3 O 4 The adsorption capacity of the adsorbent to phosphate is relatively large, and the adsorbent prepared in Example 1, when the dosage of the adsorbent is 2g / L, the initial concentration of phosphate is 100mg / L, and the adsorption time is 12h, at 25 The theoretical saturated adsorption capacity at ℃, 30℃ and 35℃ were 42.95mg / g, 57.04mg / g and 73.06mg / g, respectively.
[0042] (2) Under the condition of 30°C, when the initial concentration of phosphate (in terms of P) is less than 60mg / L, the dosage of adsorbent is 2g / L, and the adsorption time is 12h, the prepared in Examples 1 and 2 La-ATP@Fe 3 O 4 The phosphate removal effici...
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