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A preparation method of an adsorbent for removing heavy metals and ammonia nitrogen in wastewater

An adsorbent and heavy metal technology, applied in chemical instruments and methods, adsorbed water/sewage treatment, ion-exchanged water/sewage treatment, etc., can solve the problems of occupying land and polluting the environment, reducing treatment costs and achieving high impurity removal rate , the effect of simple processing methods

Inactive Publication Date: 2019-01-25
HUNAN INSTITUTE OF SCIENCE AND TECHNOLOGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

This kind of filter residue has been sent to the slag yard for a long time, which not only occupies land, but also seriously pollutes the environment, which has become a major problem for catalyst factories.

Method used

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  • A preparation method of an adsorbent for removing heavy metals and ammonia nitrogen in wastewater

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] (1) Add 40 g of magnesium carbonate and 47 g of kaolin to 240 g of catalyst filter residue, stir for 2 hours, spray and granulate the uniform slurry, and the median diameter of the sprayed microspheres is 55 μm;

[0023] (2) Roast the spray material in (1) at 500 °C for 5 hours;

[0024] (3) Add 25 ml of water, 16 g of magnesium carbonate, 47 g of kaolin, and 4 g of potassium acetate to the roasted material in (2), stir well, extrude and shape the material, and dry the formed material at 100°C for 24 hours to obtain Adsorbent A.

Embodiment 2

[0026] (1) Add 30 g of calcium borate and 43 g of bentonite to 1920 g of catalyst filter residue, stir for 4 hours, spray and granulate the uniform slurry, and the median diameter of the sprayed microspheres is 50 μm;

[0027] (2) Roast the spray material in (1) at 1000°C for 0.5 hours;

[0028] (3) Add 100 ml of water, 18 g of calcium borate, 36 g of kaolin, and 12 g of ethylene glycol to the roasted material in (2), stir well, roll into a ball, and dry the formed material at 150°C for 10 h to produce into adsorbent B.

Embodiment 3

[0030] (1) Add 13 g of aluminum chloride and 18 g of attapulgite to 232 g of catalyst filter residue, stir for 2 hours, spray and granulate the uniform slurry, and the median diameter of the sprayed microspheres is 60 μm;

[0031] (2) Roast the spray material in (1) at 800 °C for 2.5 hours;

[0032] (3) Add 30 ml of water, 7 g of aluminum chloride, and 15 g of attapulgite to the roasted material in (2), stir well, press into tablets, and dry the formed material at 120°C for 19 hours to make an adsorbent c.

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Abstract

The invention relates to an adsorbent for removing heavy metals and ammonia nitrogen in waste water as well as a preparation method thereof. The invention is characterized in that the adsorbent comprises the following chemical compositions in percentage by weight: 30-80% of catalyst residues, 10-30% of an additive, and 10-40% of clay. The preparation method of the adsorbent comprises the following steps: A: the additive and the clay are added into the catalyst residues with fully and uniformly stirring, spray drying is carried out for moulding, and the median diameter of spray microballoons is 50-60[mu]m; B. the materials in the step A are calcinated for 0.5-5 hours at 500-1000 DEG C; C. water, the additive and the clay are added into the calcinated materials in the step B with fully and uniformly stirring, band extrusion or ball rolling or tabletting and other modes are carried out for moulding, drying is carried out, the drying temperature is 100-150 DEG C, the drying time is 10-24 hours, and the adsorbent is prepared. The method has the advantages of simple preparation technological processes, low cost, high-efficient removal of heavy metals and ammonia nitrogen and other poisonous and harmful pollutants in waste water, simple treatment method, wide application scope, stable effect, and wide application prospects; the method meets the green and environmental protection principles of treatment of wastes with wastes.

Description

technical field [0001] The invention relates to a preparation method of an adsorbent for removing heavy metals and ammonia nitrogen in waste water, belonging to the technical field of waste water treatment. Background technique [0002] With the rapid development of urbanization and industrial and agricultural production in our country, the amount of sewage discharge is increasing day by day, and water pollution is quite serious, almost all over the country. In this context, the sewage treatment industry has become a new industry. [0003] During the production process of refinery catalyst plants, a large amount of sewage and solid filter residues are discharged every year, which are sticky, with complex composition and high moisture content, mainly containing 60-70% SiO 2 , 20~30%Al 2 o 3 , a small amount of rare earth oxide, sodium oxide and iron oxide, etc., contains a small amount of Y-type and ZSM-5 zeolite molecular sieves, has a large specific surface and pore volu...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J20/18B01J20/30C02F1/28C02F1/42
Inventor 郑淑琴何理均唐课文易健民任邵余红霞张建策
Owner HUNAN INSTITUTE OF SCIENCE AND TECHNOLOGY
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