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Preparation method of high-efficiency chromium-removing composite absorbent

A composite adsorption and high-efficiency technology, applied in chemical instruments and methods, adsorption water/sewage treatment, water/sludge/sewage treatment, etc., can solve the problems of difficult recovery of chromium, equipment blockage, high production costs, and low production costs. , does not cause equipment blockage, easy to recycle

Inactive Publication Date: 2013-01-16
CHINA UNIV OF GEOSCIENCES (BEIJING)
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0011] However, the adsorbent prepared by the above-mentioned patent has the problems of easy to cause equipment blockage, difficult to recover chromium, and high production cost, which limits the application of adsorption to remove chromium to a certain extent.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] Red mud and montmorillonite clay were used as raw materials. The montmorillonite clay was purchased from Zhenyongwei Technology Co., Ltd., the raw materials were crushed to 100 mesh, and 4g of red mud powder, 3g of montmorillonite powder, and 2g of soluble starch were transferred to the mixer , slowly add an appropriate amount of water, and stir evenly; knead the evenly stirred material into uniform spherical particles with a diameter of 3~5mm; place the shaped particles in an oven for 24 hours at 105°C and then place them in a muffle furnace for 600°C roasting for 1 hour. Cool down to room temperature naturally to prepare a highly efficient chromium-removing porous particle adsorbent.

[0025] Weigh 2g of the high-efficiency chromium-removing porous particle adsorbent prepared above, put it in a 250mL conical flask, add 100mL of simulated wastewater solution containing chromium 10mg / L, without stirring, and let it stand at a constant temperature of 20°C±1°C for 72h Mea...

Embodiment 2

[0030] Red mud and montmorillonite clay were used as raw materials. The montmorillonite clay was purchased from Zhenyongwei Technology Co., Ltd., the raw materials were crushed to 90 mesh, and 5g of red mud powder, 3g of montmorillonite powder, and 2g of soluble starch were transferred to the mixer , slowly add an appropriate amount of water, and stir evenly; knead the evenly stirred material into uniform spherical particles with a diameter of 3mm; place the shaped particles in an oven for 110°C to dry for 12h, then put them in a muffle furnace for 650°C for 0.5h, and naturally After cooling down to room temperature, a highly efficient chromium-removing porous particle adsorbent is prepared.

Embodiment 3

[0032] Red mud and montmorillonite clay were used as raw materials. The montmorillonite clay was purchased from Zhenyongwei Technology Co., Ltd., and the raw materials were crushed to 120 mesh, and 4.5g of red mud powder, 3g of montmorillonite powder, and 2g of soluble starch were transferred to the stirring Slowly add an appropriate amount of water and stir evenly; knead the uniformly stirred material into uniform spherical particles with a diameter of 5mm; dry the shaped particles in an oven at 90°C for 24h, and then bake them in a muffle furnace at 550°C for 2h. After cooling down to room temperature, a highly efficient chromium-removing porous particle adsorbent is prepared.

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Abstract

The invention discloses a preparation method of a high-efficiency chromium-removing composite absorbent. The preparation method comprises the following steps of: adopting red mud and montmorillonitic clay as raw materials, adding water and soluble starch, fully and uniformly stirring, granulating, molding, and drying; and roasting for 0.5-2 hours at the temperature of 550-650 DEG C. The preparation method disclosed by the invention has the advantages that the high-efficiency water-body chromium-removing composite absorbent is prepared by adopting industrial waste red mud and montmorillonitic clay as raw materials and adopting simple granulation and roasting, the production process is simple, the production cost is low, and no harmful gas and sewage are produced in the production process. The prepared absorbent has the advantages that the affinity to water-body chromium is high, the absorbing efficiency is high, toxicity and harm can not be generated to a water body and aquatic organisms, the removal from the water body is convenient after use, the recovery is easy in the use process, and the blocking to equipment can not be caused, so that the purposes of removing the water-body chromium in a high-efficiency manner and simultaneously carrying out recycling on waste are achieved.

Description

[0001] technical field [0002] The invention relates to a preparation method of a high-efficiency chromium-removing composite adsorbent, belonging to the technical field of sewage treatment. Background technique [0003] Chromium and its compounds are widely used in various fields of industrial production, and are important raw materials for metallurgy, electroplating, tanning, paint, pigment, printing and dyeing, pharmaceuticals and other industries. These industrial sectors are widely distributed, and a large amount of chromium-containing wastewater, dust and chromium slag are discharged into the environment, causing serious pollution to water, air and soil. [0004] Chromium poisoning is mostly caused by chromium (VI), which can convert hemoglobin into methemoglobin and interfere with the oxidation, reduction and hydrolysis processes in the body. Frequent exposure to large doses of chromium (VI) can cause ulcers or adverse reactions at the contact site. Excessive intak...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J20/12B01J20/30C02F1/28C02F101/22
Inventor 陈男冯传平王秋懿
Owner CHINA UNIV OF GEOSCIENCES (BEIJING)
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