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Method of treating arsenic pollution of solid or water

A technology for arsenic pollution and water bodies, applied in the field of environmental pollution control, can solve problems such as soil or water body arsenic pollution, and achieve the effects of high repair efficiency, easy promotion and application, and vigorous growth

Inactive Publication Date: 2006-06-14
SUN YAT SEN UNIV
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  • 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 using plants to control arsenic pollution in soil or water in view of the current serious problem of arsenic pollution in soil or water

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] Embodiment 1: Arsenic-contaminated soil remediation test

[0030] Cultivate the seedlings of Pteris obliquus, Pteris nobile, Pteris aurantium and Pteris dentata transplanted in the field in the normal soil of the greenhouse, the relative air humidity is 60-80%, and the day temperature is 20-25°C. The night temperature is 10-15°C. When the seedlings grow to 6-10 cm, they are transplanted into arsenic-contaminated soil. The arsenic content in the soil for testing is 200mg / kg, N:P 2 o 5 : K 2 O=0.15:0.10:0.15g / kg dry soil, adjust the pH to 6.5-7.5. Harvest the aboveground part after growing for 3 months, and leave 3 to 5 cm stubble. The arsenic content in the leaves of Pteris obliquus, Pteris nobile, Pteris aurantium and Pteris dentata harvested for the first time were 1335, 3224, 4036 and 3634mg / kg (dry weight) respectively; Plants grow continuously, soil arsenic is continuously extracted, and the aboveground parts are harvested continuously, and the arsenic content i...

Embodiment 2

[0031] Embodiment 2: arsenic-polluted water restoration test

[0032]Cultivate the seedlings of Pteris obliquus, Pteris nobile, Pteris aurantium and Pteris dentata transplanted in the field in the normal soil of the greenhouse, the relative air humidity is 60-80%, and the day temperature is 20-25°C. The night temperature is 10-15°C. When the seedlings grow to 6-10 cm, the plants are transplanted into the floating bed. The roots are directly in contact with the polluted water body through the small holes drilled on the floating bed. In the early stage of growth, add sponge or absorbent cotton to the small holes to stabilize the plants. The arsenic content of the test water was 100mg / kg, and the pH was adjusted to 6.5-7.5. After two months of growth, the shoots were harvested. The arsenic content of the leaves of the first-harvested Pteris obliquus, Pteris nobile, Pteris aurantium, and Pteris dentifera were 1021, 2864, 3842 and 3082 mg respectively. / kg (dry weight); the four p...

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Abstract

A method for controlling the pollution of As to soil and water features that the pteridophytes able to collect As, such as Pteris oshimensis, P. fauriei, P. aspericaulis and P. multifida, are planted in the soil or water to be controlled for absorbing the As from soil and water, and their plant stems on the ground are periodically harvested.

Description

technical field [0001] The invention relates to the technical field of environmental pollution control, in particular to a method for using plants to control arsenic pollution in soil or water. Background technique [0002] Arsenic pollution caused by the production of arsenic compounds, smelting of arsenic-containing minerals and burning of fossil fuels has affected the environmental quality of soil, water and air. It is estimated that the global anthropogenic emission of As to soil reaches 28400-94000t per year. In the 1970s, about 80% of As produced was used in agricultural production (pesticides, herbicides, etc.); at present, the amount of As used in agriculture is decreasing day by day, but nearly 97% of As production enters the final product in the form of white arsenic. The remaining 3% is used in the manufacture of metallurgical additives, especially lead-copper alloys. [0003] Arsenic and its compounds are well-known "three substances", namely teratogenic, carci...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B09C1/00A01G9/00B09C1/10C02F3/32
Inventor 王宏斌叶志鸿蓝崇钰束文圣
Owner SUN YAT SEN UNIV
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