Lanthanide series water treatment agent and method of preparing the same
A water treatment agent, lanthanide technology, applied in the field of water treatment, to achieve the effect of improving adsorption capacity, ensuring effectiveness and safety, and eliminating inorganic pollution problems
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Embodiment 1
[0030] The preparation of embodiment 1 water treatment agent of the present invention
[0031] 0.26La 2 o 3 0.30CeO 2 0.013Pr 6 o 11 0.018Nd 2 o 3 0.28SiO2 2 0.085Al 2 o 3 0.014MgO
[0032] The preparation method is as follows:
[0033] a, add the chlorides of La, Ce, Pr, Nd in the reaction kettle according to the above-mentioned proportion, add dilute hydrochloric acid (the concentration of hydrochloric acid by volume is 33%) by the solid-liquid ratio of 1: 4-5, the reaction kettle is heated to Stir at 80-110°C for 40-60 minutes, and remove impurities by high-pressure filtration to obtain a solution containing La, Ce, Pr, and Nd.
[0034] b. Pump the above solution into the next stage reaction kettle and add 0.5-0.8 tons / 5m 3 The sodium hydroxide is converted, the alkali cake is washed repeatedly, and when the pH value of the washing solution reaches 7.5, the nitric acid of 65% v / v is added according to the ratio of the weight ratio volume of the alkali cake and n...
Embodiment 2
[0038] Embodiment 2 The preparation of water treatment agent of the present invention
[0039] Raw materials are prepared according to the proportioning in Table 1 and Table 2, and the preparation method is the same as in Example 1. Wherein raw material citric acid is to add when c step crystallization. The prepared samples were used to treat sewage, and the results are shown in Table 1 and Table 2.
[0040] Table 1
[0041]
[0042] It can be seen from the above table that at least La 2 o 3 , CeO 2 Two kinds of lanthanide elements, water treatment agent can have a good degradation and conversion effect on COD, BOD, ammonia nitrogen, total phosphorus, etc.
[0043] Table 2
[0044]
[0045] From the above table, it can be seen that the change value of COD and BOD after adding citric acid shows that the ability to deal with aerobic organic matter in the water body is greatly enhanced, thus contributing to the degradation and transformation of COD, BOD, ammonia nitro...
Embodiment 3
[0046] Embodiment 3 The preparation of water treatment agent of the present invention
[0047] The preparation method is the same as in Example 1, and the raw materials are prepared according to the proportioning in Table 3.
[0048] table 3
[0049]
[0050] The inventor of the present invention is through a large amount of screening experiments, and the result shows: La 2 o 3 , CeO 2 、Pr 6 o 11 、Nd 2 o 3 , SiO 2 、Al 2 o 3 , The proportioning ratio of MgO is optimal with 20-25: 32-40: 1.9-2.5: 2.1-3: 15-20: 4-5: 1.1-1.3.
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Abstract
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