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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 ensure the effectiveness and safety, eliminate the problem of inorganic pollution, capture the effect of large cross-sectional area

Active Publication Date: 2011-04-13
四川瑞泽科技有限责任公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The technical problem to be solved by the present invention is to combine bio-ecological restoration technology, microbial technology and anaerobic technology to provide a method that can simultaneously treat pollutants in water bodies, such as toxic and harmful organic substances, chemical substances, heavy metals and nitrogen. , phosphorus, etc. can be reduced and removed, and at the same time can eliminate or inhibit the growth and reproduction of blue-green algae, green algae and red tides, etc. and degrade algae toxins, etc.

Method used

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  • Lanthanide series water treatment agent and method of preparing the same
  • Lanthanide series water treatment agent and method of preparing the same
  • Lanthanide series water treatment agent and method of preparing the same

Examples

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Comparison scheme
Effect test

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 reactor according to the above proportion, add dilute hydrochloric acid (the concentration of hydrochloric acid by volume is 33%) by the solid-liquid ratio of 1: 4-5, and the reactor 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 nitric acid to 1: 2.2-2...

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

The invention relates to a lanthanide water treatment agent as well as a preparation method thereof, which is a novel water treatment agent. The chemical compositions of the agent are: a La2O3.b CeO2.c Pr6O11.d Nd2O3.e SiO2.f Al2O3.g MgO and a small quantity of unavoidable impurities, wherein, numeric areas of coefficients of a, b, c, d, e, f and g are respectively: 0.20<=a<=0.35, 0.32<=b<=0.55, 0<=c<=0.035, 0<=d<=0.035, 0.10<=e<=0.30, 0.03<=f<=0.09, 0.010<=g<=0.014. The water treatment agent can eliminate the organic pollution in water and can also eliminate most of inorganic pollution, and can treat general pollution and eliminate or inhibit the growth and reproduction of blue algae, green algae and red tide. The water treatment agent and the preparation method are favorable for treating the pollution of reservoirs, lakes, ponds and rivers with slow velocity of flow and for restoring the water ecological environment, and can also treat drinking water, culture water, irrigation water, landscape water, industrial wastewater, domestic wastewater, etc.

Description

technical field [0001] The invention relates to a novel water treatment agent, in particular to a water treatment agent containing lanthanide elements, and belongs to the technical field of water treatment. Background technique [0002] Polluted water treatment is to use various methods to separate the pollutants contained in the polluted water, or convert them into harmless and stable substances, so that the polluted water body can be purified. According to the principle of sewage treatment technology, it can be divided into the following three categories: 1. Physical treatment methods, mainly using filtration, sedimentation, flotation and other methods to remove suspended solids. 2. Chemical treatment methods, including neutralization, oxidation, chemical coagulation, electrolytic coagulation, ion exchange and other methods. 3. Biological treatment method, which uses the biochemical action in the process of microbial life movement to decompose harmful organic matter into ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C02F1/00C02F1/28C02F1/50C02F3/00
Inventor 王德林
Owner 四川瑞泽科技有限责任公司
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