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Method for modifying manganese ore and application thereof in removal of arsenic from groundwater permeable reactive wall

A manganese ore, the purpose of the technology, the application in the groundwater osmotic reaction wall to remove arsenic, the field of manganese ore modification, can solve the problems of expensive materials and complicated preparation process, and achieve simple preparation process, low raw material cost and low energy consumption Effect

Inactive Publication Date: 2012-04-18
HUAZHONG AGRI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0015] Although the above-mentioned materials for removing arsenic in water have a high removal rate for arsenic, their respective preparation processes are relatively complicated and the materials are relatively expensive.

Method used

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  • Method for modifying manganese ore and application thereof in removal of arsenic from groundwater permeable reactive wall
  • Method for modifying manganese ore and application thereof in removal of arsenic from groundwater permeable reactive wall
  • Method for modifying manganese ore and application thereof in removal of arsenic from groundwater permeable reactive wall

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0072] A manganese ore modification method, the components by weight are as follows:

[0073] Based on the dry basis of the finished product as 200kg:

[0074] Iron-containing manganese ore (manganese content 40%-50%, iron content 15-25%, particles over 200 mesh) 135kg;

[0075] Sharp nano titanium dioxide 1kg;

[0076] Coconut shell activated carbon 14kg;

[0077]Ordinary Portland cement (label 325) 50kg;

[0078] Add water 100kg;

[0079] The firing temperature is 200°C;

[0080] Prepare as follows:

[0081] 1) Fully mix manganese ore and sharp nano-titanium dioxide according to the formula for 15 minutes to obtain material 1;

[0082] 2) Add activated carbon to material 1 and continue to mix uniformly to obtain material 2;

[0083] 3) The obtained material 2 is sprayed with clear water and ordinary Portland cement under stirring, and fully mixed to obtain material 3;

[0084] 4) making the obtained material 3 into 1-3 cm spherical particles with an extrusion granula...

Embodiment 2

[0089] A manganese ore modification method, the components by weight are as follows:

[0090] Based on the dry basis of the finished product as 200kg:

[0091] Iron-containing manganese ore (manganese content 40%-50%, iron content 15-25%, particles over 200 mesh) 147kg;

[0092] Sharp nano titanium dioxide 3kg;

[0093] Coconut shell activated carbon 10kg;

[0094] Ordinary Portland cement (label 325) 40kg;

[0095] Add water 150kg;

[0096] The firing temperature is 180°C.

[0097] The arsenic-removing material prepared in this example was adsorbed in an indoor simulated osmotic reaction wall with simulated underground wastewater containing 200 μg / L As(V) / As(III) under laboratory conditions. The saturated adsorption capacity for arsenic is As(III): 9.356mg / g and As(V): 9.548mg / g. The adsorption of As(III) and As(V) conforms to the second-order kinetic equation, and the correlation R 2 = 0.9992. The validity period can be up to 9.5 years.

Embodiment 3

[0099] A manganese ore modification method, the components by weight are as follows:

[0100] Based on the dry basis of the finished product as 200kg:

[0101] Iron-containing manganese ore (manganese content 40%-50%, iron content 15-25%, particles over 200 mesh) 155kg;

[0102] Sharp nano titanium dioxide 5kg;

[0103] Coconut shell activated carbon 5kg;

[0104] Ordinary Portland cement (label 325) 35kg;

[0105] Add water 200kg;

[0106] The firing temperature is 150°C.

[0107] The arsenic-removing material prepared in this example was adsorbed in an indoor simulated osmotic reaction wall with simulated underground wastewater containing 200 μg / L As(V) / As(III) under laboratory conditions. The saturated adsorption capacity for arsenic is As(III): 9.931 mg / g and As(V): 10.101 mg / g. The adsorption of As(III) and As(V) conforms to the second-order kinetic equation, and the correlation R 2 = 0.9922. Validity can be up to 10 years.

[0108] According to the technical sch...

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Abstract

The invention belongs to the technical field of groundwater treatment, and discloses a method for modifying low-grade manganese ore and application thereof in removal of arsenic from a groundwater permeable reactive wall. The method is characterized in that low-cost and readily available iron-containing manganese ore is used as a main raw material, after being subjected to modified pelleting, thematerial is taken as a material of the permeable reactive wall, and the material can remove arsenic from groundwater quickly and efficiently. Based on 200 kilograms of dry basis of manufactured goods, the groundwater permeable reactive wall arsenic removing material comprises the following components by weight: 120 to 150 kilograms of iron-containing manganese ore (40 to 50 percent of manganese content, 15 to 25 percent of iron content, and granules is sieved with a 200-mesh sieve), 5 to 15 kilograms of anatase nano-titanium dioxide, 10 to 20 kilograms of coconut shell activated carbon, 30 to50 kilograms of ordinary silicate cement (grade 325) and 100 to 200 kilograms of clear water. The roasting temperature is between 150 and 200 DEG C. The invention also discloses the method for modifying the low-grade manganese ore and the application thereof in the removal of arsenic from the groundwater permeable reactive wall.

Description

technical field [0001] The invention belongs to the technical field of groundwater treatment, and in particular relates to a modification method of manganese ore and its application in removing arsenic from groundwater osmotic reaction walls. With iron-manganese ore as the main raw material, the adsorption performance of arsenic is significantly improved after the material is modified and granulated, and it is used as the material of the osmotic reaction wall. The invention can quickly and efficiently remove the arsenic in the ground water. technical background [0002] Due to activities such as mining, sewage irrigation, and drilling wells for drinking water, a large amount of arsenic compounds in the earth's surface dissolves into surface water and groundwater, which has brought about serious arsenic pollution in groundwater. Arsenic and arsenic compounds are recognized carcinogens, so the treatment and remediation of arsenic pollution in groundwater has become the most u...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J20/02C02F1/62C02F1/28C02F101/20
Inventor 涂书新黄永炳李小娟马琳张小明龙晓燕
Owner HUAZHONG AGRI UNIV
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