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Permeable reactive barrier material for treating groundwater arsenic pollution and preparation method and application

A technology for osmosis reaction wall and arsenic pollution, which is applied in water/sewage treatment, chemical instruments and methods, adsorbed water/sewage treatment, etc. It can solve the problem that arsenic removal technology and materials are not common in groundwater, and achieve good regeneration. The effect of low cost of raw materials and good economic benefits

Inactive Publication Date: 2011-10-12
HUAZHONG AGRI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0010] Most of the above-mentioned patent documents are aimed at the treatment of arsenic in wastewater and drinking water, but there are not many technologies and materials for the removal of arsenic in groundwater, especially the osmotic reaction wall materials used for the restoration of arsenic pollution in groundwater have not yet been patented.

Method used

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  • Permeable reactive barrier material for treating groundwater arsenic pollution and preparation method and application
  • Permeable reactive barrier material for treating groundwater arsenic pollution and preparation method and application
  • Permeable reactive barrier material for treating groundwater arsenic pollution and preparation method and application

Examples

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Effect test

Embodiment 1

[0062] A osmotic reaction wall material for repairing groundwater arsenic pollution. First, the natural rutile ore is modified. The components by weight are as follows:

[0063] Based on the dry basis of the finished product as 1000kg:

[0064] Natural rutile ore (90% over 100 mesh) 940kg;

[0065] Chemically pure FeCl 3 60kg;

[0066] Titanium-manganese-containing materials (TiO 2 with MnO 2 1:1) 1kg;

[0067] 1) Weigh FeCl 3 .6H 2 O dissolved in 100L of water;

[0068] 2) Weigh rutile ore, add step 1) gained FeCl 3 solution, stirred in a stirrer for 24h;

[0069] 3) Pour off the supernatant from the soaked rutile ore, add deionized water to clean it, leave it for a period of time, then pour off the supernatant;

[0070] 4) After repeating step 3) 3 times, add the titanium-containing material for the last time and mix well. Dry the obtained material in an oven at 110°C for 24 hours;

[0071] 5) Put the osmotic reaction...

Embodiment 2

[0074] According to the preparation method of Example 1, the present example is another optimized formula wherein the natural rutile ore is modified first, and the components by weight are as follows:

[0075] Based on the dry basis of the finished product as 1000kg:

[0076] Natural rutile ore (90% over 100 mesh) 950kg;

[0077] Chemically pure FeCl 3 50kg;

[0078] Titanium-manganese-containing materials (TiO 2 with MnO 2 1:1) 5kg;

[0079] The iron-modified rutile ore prepared in this embodiment, after reacting for 2h, has a removal rate of 94.1% and 90.4% to As(V) and As(III) (see figure 2 ), the adsorption capacities for As(V) and As(III) are 10mg / g and 6mg / g respectively (see image 3 ).

Embodiment 3

[0081] The present embodiment is the best implementation mode of the present invention. According to the preparation method of the embodiment, the natural rutile ore is modified first, and the components of its formula by weight are as follows:

[0082] Based on the dry basis of the finished product as 1000kg:

[0083] Natural rutile ore (90% over 100 mesh) 955kg;

[0084] Chemically pure FeCl 3 35kg;

[0085] Titanium-manganese-containing materials (TiO 2 with MnO 2 1:1) 10kg;

[0086] The osmotic reaction wall material prepared by the present invention and its embodiments is 100% to As(V) and As(III) removal rate after reaction 2h (see figure 2 ), the adsorption capacities for As(V) and As(III) are 11mg / g and 6mg / g (see image 3 ).

[0087] The osmotic reaction wall material prepared by the present invention and its embodiments can reduce the groundwater with an arsenic content of 200ug / L by more than 95% within 2 hours under...

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Abstract

The invention belongs to the technical fields of groundwater pollution treatment and agricultural environmental protection, and in particular relates to a permeable reactive barrier material for treating groundwater arsenic pollution and a preparation method and application. The preparation method comprises the following steps: firstly, carrying out modification treatment on natural rutile ore, wherein 1,000kg of finished product dry basis comprises 940 to 960kg of natural rutile ore, 40 to 60kg of chemically pure FeCl3 and 1 to 10kg of titaniferous manganese material (the mass ratio of TiO2 to MnO2 is 1:1); and mixing and soaking the materials to obtain the permeable reactive barrier material used for treating groundwater arsenic pollution. The modified rutile ore can be used as the permeable reactive barrier material to efficiently eliminate arsenic in groundwater body, thereby having great significance for solving the problem of arsenic pollution in water body and guaranteeing drinking water (groundwater) safety.

Description

technical field [0001] The invention belongs to the technical field of water treatment and agricultural environmental protection. Specifically, the invention relates to a osmotic reaction wall material for repairing arsenic pollution in groundwater, a preparation method and application. The material of the invention is cheap and easy to obtain. The rutile ore is used as the main material and modified by adding chemical modification reagents to obtain a osmotic reaction wall material for repairing arsenic pollution in groundwater. The invention enables the modified rutile ore to be used as a osmotic reaction wall material to efficiently remove arsenic in groundwater, and is of great significance for solving the problem of arsenic pollution in water and ensuring the safety of drinking water (groundwater). technical background [0002] Arsenic and arsenic compounds are recognized carcinogens. Due to activities such as mining, sewage irrigation, and drilling wells for drinking ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J20/06B01J20/30C02F1/28C02F1/58
Inventor 涂书新马琳黄永柄张小明龙晓燕
Owner HUAZHONG AGRI UNIV