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Method for governing arsenic contamination in soil and water body

A technology for arsenic pollution and water body, which is applied in the field of soil and water body arsenic pollution control, which can solve problems such as soil and water body arsenic pollution, and achieve the effects of high restoration efficiency, improved water quality, and vigorous growth

Inactive Publication Date: 2005-03-30
SUN YAT SEN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] The purpose of the present invention is to provide a method for controlling arsenic pollution in soil or water in view of the current serious problem of arsenic pollution in soil and water

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] Example 1: Soil Remediation

[0032] The seedlings of the side grass transplanted in the field are cultivated in the normal soil of the greenhouse, the relative air humidity is 60-80%, the day temperature is 20-25°C, and the night temperature is 10-15°C. When the seedlings grow to 6-10 cm, they are transplanted into Heavy metal polluted soil, the arsenic content of the tested soil was 300mg / kg, the pH was adjusted to 7-8 by lime application, the row spacing was 15 cm, and the plant spacing was 10 cm. Harvest the aboveground part after growing for 3 months, leaving 4 to 5 cm of stubble. The arsenic content in the aboveground part of the well fence grass harvested for the first time was determined to be greater than 1000mg / kg (dry weight); the well fence grass continued to grow, the soil arsenic was continuously extracted, and the aboveground parts were continuously harvested, and the arsenic content in the soil continued to increase. decrease to normal levels.

Embodiment 2

[0033] Example 2: Water restoration

[0034] Sow the mature spores of the wellside grass evenly on the mulched leaf soil that has been sifted and steamed, keep it moist and place it in a dark place with a daytime temperature of 20-25°C, a night temperature of 10-15°C, and an air humidity of 60-80%. Sporophylls grow in about two months. Then the curb grass seedlings were cultivated in normal soil in the greenhouse, and the cultivation conditions were the same as above. When the seedlings grow to 5-10 cm, they are transplanted into a floating bed with arsenic-contaminated water. The roots pass through the small holes drilled on the floating bed and directly contact the polluted water. In the early stage of growth, add sponges to the small holes to stabilize the plants; Background content: 5~80mg / L, adjust pH to weak alkaline. Harvest the shoots after 3 weeks of growth, leaving 3 to 4 cm of stubble. It was determined that the arsenic content in the leaves and roots of the harv...

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Abstract

In the invention, pteris multifida with super enriched arsenic is used to absorb and activate arsenic in polluted soil or water and to transport or transter arsenic upward to above the ground until that proper living things quantity is formed on upersection of the ground, then to reap the section above the ground on a fixed date and retain the section under the ground, to stub 3-5cm when reaping to realize continuous collecting. By the invention, a continuous collecting mode is bilt to continuous transfer large guantity of arsenic in polluted soil or water until that content of arsenic achieving environment safe standard.

Description

technical field [0001] The invention relates to the field of environmental pollution, in particular to a method for controlling arsenic pollution in soil and water. Background technique [0002] It is estimated that 28400-94000t of As is released into the soil by humans every year in the world, and arsenic and its compounds are well-known "three substances", namely teratogenic, carcinogenic and mutagenic. Therefore, the control of arsenic-contaminated soil and water has attracted widespread attention at home and abroad. [0003] my country is rich in arsenic ore resources. Due to the natural weathering of arsenic-rich ore bodies and corresponding mining activities such as open-pit mining and smelting, as well as the use of a large number of metallurgical additives, pesticides, herbicides and chemical fertilizers, a large area of ​​soil in my country has Arsenic pollution of water bodies and water bodies is particularly serious in areas around mines and smelters. Excessive ex...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B09C1/10C02F3/32
Inventor 王宏镔叶志鸿蓝崇钰束文圣
Owner SUN YAT SEN UNIV
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