Method for repairing arsenium contaminated environment

An arsenic pollution and environmental technology, applied in the field of remediation of arsenic-polluted environment, can solve the lack of economical, large-scale remediation and treatment technology, the ineffectiveness of high-arsenic tailings and high-arsenic wastewater treatment, and the inability to obtain treatment and remediation of arsenic. Environmental pollution and other problems, to achieve good environmental benefits, no secondary pollution, and no damage to ecological functions.

Inactive Publication Date: 2004-06-09
INST OF GEOGRAPHICAL SCI & NATURAL RESOURCE RES CAS
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Problems solved by technology

Arsenic is highly toxic to plants. Ordinary plants have poor tolerance to arsenic, and it is often difficult to grow and develop normally in a high-arsenic environment. Therefore, planting ordinary plants cannot achieve obvious control and restoration of arsenic-polluted environments (soil, Tailings, wetlands and water bodies), especially for the treatment of high-arsenic tailings and high-arsenic wastewater is more difficult to be effective
For arsenic-containing wastewater and arsenic-polluted water bodies, there is still a lack of economical, large-scale remediation and treatment technologies

Method used

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  • Method for repairing arsenium contaminated environment
  • Method for repairing arsenium contaminated environment

Examples

Experimental program
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Effect test

Embodiment 1

[0022] Embodiment 1: Remediation of arsenic-contaminated soil with big-leaf wellhead edge grass

[0023] In the arsenic-contaminated soil containing 206 mg / kg of arsenic, the seedlings of S. japonica were transplanted, and the row and plant spacing were 15-20 cm and 8-10 cm, respectively. After the big-leaf wellhead edge grass survived, it was managed according to the management methods of common crops, and the aboveground part was harvested after 5 months. It was determined that the total amount of arsenic absorbed from the soil by the upper part of the grassland at the mouth of Daye well was 3570mg / kg, and the arsenic content in the soil was reduced from 206mg / kg to 165mg / kg, and the total arsenic in the soil was reduced by 19.9%. After the plants continued to grow for 3 months, they were harvested for the second time. At this time, the arsenic content in the soil was reduced to 134 mg / kg, and the total arsenic in the soil was reduced by 35.0%. Afterwards, the above-ground ...

Embodiment 2

[0024] Example 2: Removing arsenic pollution in water body with big-leaf wellhead edge grass

[0025] Punch holes in a row on the plastic foam board, the density of the holes is 10-15cm × 8-10cm, and transplant 2-3 large-leaf wellhead grasses with a height of about 10-15cm in each hole. Place (float) the plastic foam board planted with big-leaf wellhead edge grass horizontally on the water surface of the polluted water body. During the process of plant growth and absorption, the root system of S. dahliae can quickly absorb and enrich a large amount of arsenic from the water body, and transport the absorbed arsenic to the shoot. When the arsenic concentration in the water reaches the standard, remove the plastic foam board and large-leaf wellhead edge grass from the water surface. The arsenic in the water body can be taken away (removed) by removing the large-leaf wellhead border grass plant, thereby achieving the effect of purifying the arsenic-polluted water body.

[0026] ...

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Abstract

The method for repairing arsenium-contaminated environment is characterized by that the spora of pteris cretica can be directly sown into the arsemium-contaminated environment (soil, tails and wet land) or the seedling-dividing mode is adopted to transplant the seedlings of pteris cretica into the arsenium-contaminated environment (soil, tails, wet land and water), the root system of pteris cretica can be used for mass-absorbing arsenium from environment and conveying it to aerial portion, and when the plant is grown to 30-50 cm height, said plant can be moved away and can carry away lots of arsenium so as to attain the goal of repairing arsenium-contaminated environment.

Description

technical field [0001] The method relates to a method for remediating an arsenic-contaminated environment, specifically using hyperaccumulator (hyperaccumulator) large-leaf wellhead edge grass (Pteris cretica L.) to remediate the arsenic-contaminated environment (soil, tailings, wetlands and water bodies) )Methods. Background technique [0002] Arsenic pollution is a common environmental problem at home and abroad. Mining, smelting, and burning of high-arsenic coal in many mining areas in my country lead to serious arsenic pollution problems; at the same time, due to geochemical background values ​​and other reasons, there are also large areas of high-arsenic areas in the south and northwest of my country. In recent years, 100 million people in Bangladesh and India have been threatened by arsenic poisoning due to arsenic pollution. These large-scale arsenic pollution and arsenic poisoning problems have caused great harm to people's lives, industrial and agricultural produc...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B09C1/00C02F3/32
CPCY02W10/10
Inventor 陈同斌安志装
Owner INST OF GEOGRAPHICAL SCI & NATURAL RESOURCE RES CAS
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