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a kind of sio 2 Preparation method and product of gel carrier ca-fe based heavy metal curing agent
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A curing agent and heavy metal technology, which is applied in the petroleum industry, coking ovens, etc., can solve the problems of synergistic removal of heavy metals and low curing efficiency of curing agents, so as to solve the problem of secondary pollution, avoid sintering problems, and reduce the density of airgel Effect
Active Publication Date: 2021-11-23
HUAZHONG UNIV OF SCI & TECH
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[0007] In view of the above defects or improvement needs of the prior art, the present invention provides a SiO 2 Preparation method and product of gel carrier Ca-Fe-based heavy metal curing agent, dispersing Fe and Ca active components to SiO by microwave-ultrasonic method 2 The airgel surface improves the curing efficiency of heavy metals in the curing agent, and solves the technical problems of low curing efficiency of the curing agent and synergistic removal of various heavy metals
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[0031] figure 1 One SIO constructed in accordance with a preferred embodiment of the present invention 2Method of preparation method of gel carrier Ca-Fe based weight metal curing agent, such as figure 1 As shown, the preparation method comprises the following steps:
[0032] (1) SiO is prepared in the normal pressure process using sol - gel method 2 Airgel;
[0033] (2) 50ml 10% -50% nitrate solution, 50ml 20-70% nitrate solution and 4-6 g of SiO 2 Gas gel mixed and placed in ultrasonic-microwave synergies, using magnetic stirring, procedure controlled temperature, constant temperature 60-100 ° C, reaction for 20-60 min, and filtered, dried, and obtained solid product;
[0034] (3) Put the curing agent completed by the load into the muffle, 400-700 ° C to cure the sintering 1H to obtain heavy metal curing agents.
[0035] SiO prepared above 2 The gel carrier Ca-Fe based weight metal curing agent is ground, and after mixing, it is called 40 mg of the curing agent, placed in a dig...
Embodiment 1
[0043] (1) SiO is prepared in the normal pressure process using sol - gel method 2 Airgel;
[0044] (2) 50ml 20% nitrate solution, 50 mL of 50% nitrate solution and 5 g of SiO 2 Gas gel mixed and placed in ultrasonic-microwave synergies, using magnetic stirring, procedure control reaction temperature, constant temperature 80 ° C, reaction 30 min, and filtered, dried, and obtained solid product;
[0045] (3) Put the curing agent completed by the load into the muffle furnace, cured for 1 h at 500 ° C to obtain a heavy metal curing agent.
Embodiment 2
[0047] (1) SiO is prepared in the normal pressure process using sol - gel method 2 Airgel;
[0048] (2) 50ml 10% nitrate solution, 50 ml of 40% nitrate solution and 4G SiO 2 Gas gel mixed and placed in ultrasonic-microwave synergies, using magnetic stirring, procedure control reaction temperature, constant temperature 80 ° C, reaction 30 min, and filtered, dried, and obtained solid product;
[0049] (3) Put the curing agent completed by the load into the muffle furnace, 400 ° C, cured for 1 h, and obtain heavy metal curing agents.
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Abstract
The invention discloses a SiO 2 The preparation method of gel carrier Ca-Fe-based heavy metal curing agent, the method comprises the following steps: S1: adopting sol-gel method to prepare SiO under normal pressure 2 Airgel carrier; S2: SiO 2 The airgel is immersed in a salt solution containing Fe and Ca metal ions, and the Fe and Ca components are loaded on SiO 2 The outer surface of airgel pores; S3: filtering the loaded solution in step S2 to obtain a solid product, drying, sintering and solidifying, thereby obtaining the heavy metal curing agent. The invention also discloses a SiO 2 Gel carrier Ca‑Fe based heavy metal curing agent. The present invention uses SiO 2 Porous airgel as carrier, screening Fe 2 o 3 and CaO as the active components of the curing agent, the Fe, Ca active components are dispersed into SiO by microwave-ultrasonic method 2 The airgel surface improves the curing efficiency of heavy metals in the curing agent, and solves the technical problems of low curing efficiency of the curing agent and synergistic removal of various heavy metals.
Description
Technical field [0001] The present invention belongs to the field of heavy metal curing agents, and more particularly to a SIO 2 Preparation method and product of gel carrier Ca-Fe based weight metal curing agent. Background technique [0002] With the industrialization of my country, the urbanization continues to accelerates, my country's organic solid waste annual output is huge and year-on-year. The organic solid waste contains a large amount of flammable components, and the recovery of the heat is an important way to achieve resource saving resources. In addition, organic hazardous treatment such as medical waste, scrapped electronic equipment, waste rubber, etc. It is an important measures to ensure human health and maintain ecological security. [0003] Pyrolysis, gasification is an effective way to achieve organic hazardous waste use, however organic solid waste is complex, especially with significant bio-toxic heavy metals such as AS, PB, CD, Hg, limiting the application ...
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