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Production method of iron and aluminium compound bone char fluorine removal agent and produced fluorine removal agent

A technology of defluoridation agent and bone charcoal, which is applied in chemical instruments and methods, contaminated groundwater/leachate treatment, special treatment targets, etc., can solve the problem of small adsorption capacity of bone charcoal defluoridation agent, and achieve high recyclability, Effect of enhanced fluoride removal ability

Inactive Publication Date: 2019-07-16
NANJING RONGZHONG ENVIRONMENTAL ENG RES INST CO LTD
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] In order to solve the problem of small adsorption capacity of previous bone char defluoride agents, the present invention provides a preparation method of iron-aluminum composite bone char defluoride agent and the prepared iron-aluminum composite bone char defluoride agent

Method used

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  • Production method of iron and aluminium compound bone char fluorine removal agent and produced fluorine removal agent

Examples

Experimental program
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Effect test

Embodiment 1

[0019] Put 900 g of the cleaned bovine bone into a muffle furnace (box-type resistance furnace SX-5-12, Tianjin Test Co., Ltd.), and carbonize at 450 ° C for 2 h to obtain bone char. After cooling the bone charcoal to room temperature, use a grinder (Tianjin Tester, FW100 grinder) to grind it through a sieve with a mesh number of 80 (particle size about 0.2mm), then wash it with deionized water until the water is clear, and then Bone charcoal pellets (unmodified bone charcoal) were obtained by drying in an oven at 100°C (Shanghai Jinghong, DHG-9030A 9070A, electric constant temperature blast drying oven, the same below).

[0020] Add 50g of bone charcoal particles (unmodified bone charcoal) to 250ml of Fe with a concentration of 4% by mass 2 (SO 4 ) 3 Soak in the solution for 0.5h, wash with deionized water until the pH is neutral, and dry in an oven at 100°C to obtain Fe 2 (SO 4 ) 3 Modified beef bone charcoal. Then Fe 2 (SO 4 ) 3 50g of modified bovine charcoal is a...

Embodiment 2

[0022] Put 900g of the cleaned bovine bone into a muffle furnace and carbonize at 450°C for 2h to obtain bone char. After cooling the bone charcoal, use a grinder to grind it through a sieve with a mesh number of 80 mesh (particle size about 0.2mm), then wash it with deionized water until the water is clear, and dry it in an oven at 100°C to obtain bone charcoal particles (unmodified sexual bone char).

[0023] Add 50g of bone charcoal particles (unmodified bone charcoal) to 150ml of Fe with a concentration of 8% by mass 2 (SO 4 ) 3 Soak in the solution for 0.3h, wash with deionized water until the pH is neutral, and dry in an oven at 100°C to obtain Fe 2 (SO 4 ) 3 Modified beef bone charcoal. Then Fe 2 (SO 4 ) 3 50g of modified bovine charcoal is added with 200ml of Al with a mass percentage concentration of 10%. 2 (SO 4 ) 3 Soak in the solution for 0.5h, wash with deionized water until the pH becomes neutral, and dry in an oven at 100°C to obtain Al 2 (SO 4 ) ...

Embodiment 3

[0025] Put 900g of the cleaned bovine bone into a muffle furnace and carbonize at 450°C for 2h to obtain bone char. After cooling the bone charcoal, use a grinder to grind it through a sieve with a mesh number of 10 mesh (particle size about 2mm), then wash it with deionized water until the water is clear, and dry it in an oven at 100°C to obtain bone charcoal particles (unmodified bone char).

[0026] Add 50g of bone charcoal particles (unmodified bone charcoal) to 450ml of Fe with a concentration of 2% by mass 2 (SO 4 ) 3 Soak in the solution for 0.7h, wash with deionized water until the pH is neutral, and dry in an oven at 100°C to obtain Fe 2 (SO 4 ) 3 Modified beef bone charcoal. Then Fe 2 (SO 4 ) 3 50g of modified beef bone charcoal is added with 350ml of Al with a mass percentage concentration of 3%. 2 (SO 4 ) 3 Soak in the solution for 1.5h, wash with deionized water until the pH becomes neutral, and dry in an oven at 100°C to obtain Al 2 (SO 4 ) 3 -Fe ...

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Abstract

The invention provides a production method of an iron and aluminium compound bone char fluorine removal agent and the produced fluorine removal agent. The production method comprises the following steps of (1) thoroughly washing the surfaces of livestock bones, and at 400-450 DEG C, conducting carbonization for 1.5-2 h to obtain bone char; (2) grinding and sieving the bone char obtained in the step (1) after cooling the bone char obtained in the step (1), and conducting drying after conducting washing to obtain bone char particles; and (3) soaking the bone char particles obtained in the step (2) in a Fe2(SO4)3 solution in a mass percentage concentration of 2-8% according to a solid to liquid ratio of 1 to (2.5 to 10) for 0.3-0.7 h, conducting drying after conducting washing, then accordingto a solid to liquid ratio of 1 to (3 to 8), soaking the bone char particles in a Al2(SO4)3 solution in a mass percentage concentration of 3-10% for 0.5-1.5 h, and conducting drying after conductingwashing to obtain the Al2(SO4)3-Fe2(SO4)3 compound bone char fluorine removal agent. The adsorption capacity of the iron and aluminium compound bone char fluorine removal agent is 8.5 times of that ofbone char which is not loaded with iron and aluminium ions, so that a fluorine removal effect is excellent.

Description

technical field [0001] The invention belongs to the technical field of groundwater defluorination, and in particular relates to a preparation method of an iron-aluminum composite bone char defluorination agent and the obtained defluorination agent. Background technique [0002] The national drinking water standard (GB5749-2006) stipulates that the maximum concentration of fluoride in drinking water must be less than 1.0 mg / L. If you drink groundwater with excessive fluoride ion concentration for a long time, it is easy to cause dental fluorosis and skeletal fluorosis. It can be seen that long-term use of groundwater with excessive fluorine will seriously affect human health. Therefore, it is of great significance to remove fluorine in drinking water. [0003] At present, the technologies for removing fluorine in groundwater include adsorption, membrane separation, ion exchange, electrodialysis, flocculation, etc. Among them, membrane separation technology can effectively rem...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J20/20B01J20/30B01J20/32C02F1/28C02F103/06C02F101/14
CPCB01J20/0229B01J20/0248B01J20/0281B01J20/20B01J20/3021B01J20/3078B01J20/3236B01J2220/4812C02F1/288C02F2101/14C02F2103/06C02F2303/16
Inventor 徐德福周晓飞黄琼许有仁陈凯
Owner NANJING RONGZHONG ENVIRONMENTAL ENG RES INST CO LTD
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