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Modified composite iron-manganese removal filtering material and preparation method thereof

A composite material and modification technology, applied in chemical instruments and methods, other chemical processes, water/sludge/sewage treatment, etc., can solve problems such as backwashing and regeneration difficulties, general iron and manganese removal effects, etc., to reduce Effect of specific gravity, reduction of water treatment cost, and reduction of water consumption

Inactive Publication Date: 2017-06-06
云南沃润特环境工程有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The invention provides a modified composite material filter material for iron and manganese removal and its preparation method, which solves the problem that the effect of iron and manganese removal is general when the existing materials with large proportions such as manganese sand and quartz sand are used as the filter material for iron and manganese removal. , and problems such as backwashing and regeneration difficulties

Method used

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  • Modified composite iron-manganese removal filtering material and preparation method thereof
  • Modified composite iron-manganese removal filtering material and preparation method thereof
  • Modified composite iron-manganese removal filtering material and preparation method thereof

Examples

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Effect test

Embodiment 1

[0037] A modified composite filter material for iron and manganese removal comprises, in parts by weight, 15 parts of modified volcanic rock, 10 parts of modified medical stone, 65 parts of quartz sand, 15 parts of modified activated carbon, and 8 parts of kaolin.

[0038] The preparation method of modified volcanic rock:

[0039] (1) The volcanic rock is pulverized to 80-100 mesh, adding a mass fraction of 10% dilute nitric acid solution to soak for 5 hours, and then washing with water for 3 times;

[0040] (2) Wash the volcanic rock with 1mol / L MnCl 2 Soak for 3 hours;

[0041] (3) KMnO with a mass fraction of 10% 4 Soak for 5 minutes;

[0042] (4) drying to obtain modified volcanic rock.

[0043] The preparation method of described modified medical stone:

[0044] (1) crush the medical stone to 80-100 mesh, set aside;

[0045] (2) heat-treat the pulverized medical stone at 250 degrees for 2 hours, and then cool it;

[0046] (3) the medical stone after cooling is soak...

Embodiment 2

[0060] A modified composite filter material for iron and manganese removal comprises, in parts by weight, 20 parts of modified volcanic rock, 13 parts of modified medical stone, 60 parts of quartz sand, 18 parts of modified activated carbon, and 9 parts of kaolin.

[0061] The preparation method of modified volcanic rock:

[0062] (1) crushing the volcanic rock to 80-100 mesh, adding a mass fraction of 8% dilute acid solution to soak for 6 hours, and then washing with water for 4 times;

[0063] (2) Wash the volcanic rock with 41.5mol / L MnCl 2 Soak for 4 hours;

[0064] (3) KMnO with a mass fraction of 8% 4 Soak for 10 minutes;

[0065] (4) drying to obtain modified volcanic rock.

[0066] The preparation method of described modified medical stone:

[0067] (1) crush the medical stone to 80-100 mesh, set aside;

[0068] (2) heat-treat the pulverized medical stone at 280 degrees for 1.8 hours, and then cool it;

[0069] (3) the medical stone after cooling is soaked 4h wi...

Embodiment 3

[0083] A modified composite filter material for iron and manganese removal comprises, in parts by weight, 16 parts of modified volcanic rock, 14 parts of modified medical stone, 70 parts of quartz sand, 15 parts of modified activated carbon, and 10 parts of kaolin.

[0084] The preparation method of modified volcanic rock:

[0085] (1) The volcanic rock is pulverized to 80-100 mesh, adding a mass fraction of 5% dilute acid solution to soak for 8 hours, and then washing with water for 5 times;

[0086] (2) Wash the volcanic rock with 1mol / L MnCl 2 Soak for 5h;

[0087] (3) KMnO with a mass fraction of 5% 4 Soak for 10 minutes;

[0088] (4) drying to obtain modified volcanic rock.

[0089] The preparation method of described modified medical stone:

[0090] (1) crush the medical stone to 80-100 mesh, set aside;

[0091] (2) The medical stone after pulverizing is carried out heat treatment at 300 degree, time 1.5, then cooling;

[0092] (3) the medical stone after cooling ...

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Abstract

The invention relates to a modified composite iron-manganese removal filtering material and a preparation method thereof. The filtering material comprises the following components in parts by weight: 15-20 parts of modified volcanic, 10-15 parts of modified medical stone, 60-70 parts of quartz sand, 10-20 parts of modified active carbon and 8-10 parts of kaolin. In the invention, by adopting the modified volcanic, modified medical stone, quartz sand and modified active carbon as raw materials and through a special modifying technology, the surface area of the volcanic, medical stone, quartz sand and active carbon is expanded, and the effective adsorption rate is increased; on the one hand, the limit of traditional iron-manganese removal technology on manganese sand is changed, and the water treatment cost is effectively lowered; on the other hand, by adopting the composite, the specific gravity of the filtering material can be effectively lowered, and the water consumption for back flushing and the regeneration difficulty are effectively reduced; and compared with the manganese sand filtering material and quartz sand filtering material, the adsorption quantity is remarkably increased, and the operation time is noticeably prolonged.

Description

technical field [0001] The invention relates to a filter material for water treatment, in particular to a modified composite filter material for removing iron and manganese and a preparation method thereof. Background technique [0002] Groundwater is generally weakly acidic and in an anoxic state. When groundwater flows through soil, minerals, and rocks, due to physical and chemical effects, groundwater often contains iron and manganese. In 2013, there were 835 centralized drinking water sources in 309 prefecture-level and above cities across the country to collect water statistics. The main indicators of groundwater sources exceeding the standard were iron, manganese and ammonia nitrogen. The survey found that my country's iron-manganese groundwater accounts for 20% of the total groundwater. The sources of iron and manganese in groundwater are generally divided into anthropogenic and natural sources. Man-made sources are generally that iron and manganese produced by huma...

Claims

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Application Information

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IPC IPC(8): B01J20/20B01J20/30C02F1/28C02F101/20
CPCB01J20/20B01J20/0222B01J20/103C02F1/288C02F2101/203C02F2101/206
Inventor 岳桂存李树琼
Owner 云南沃润特环境工程有限公司
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