Phytoremediation method for eliminating manganese toxicity in soil

A phytoremediation and soil technology, applied in the restoration of contaminated soil, etc., can solve the problems of soil structure damage, high economic cost, manganese non-degradability, etc., and achieve the effect of large biomass, easy maintenance, and low cost

Inactive Publication Date: 2014-01-01
GUILIN UNIVERSITY OF TECHNOLOGY
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Problems solved by technology

[0003] Due to the characteristics of accumulation, non-degradability and regional differences of manganese in soil, it makes the treatment of manganese-contaminated soil a difficult problem
Traditional methods of remediation of contaminated soil, such as soil replacement method, leaching method, heat treatment method, curing method, electrokinetic repair method, etc., are widely used due to their high technical requirements, high economic costs, and serious damage to soil structure. There are many problems with scaling

Method used

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Examples

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Embodiment

[0012] In the vegetable field around a mining area in northern Guangxi, a 2m×4m plot was used for restoration. The average content of active manganese in the soil is 328 mg / kg, and the pH is 5.2-5.8. Manganese toxicity is relatively serious, and vegetables cannot grow normally. First prepare the ground, remove the weeds, and then plant the well-grown Paleopsis seedlings on the plot according to the row spacing of 15cm×15cm. After 2 months of growth, the plant height reaches 0.8m-1.0m, and the manganese content in stems and leaves reaches an average of 1.6 g / kg. At this time, the above-ground part is harvested, and the harvested material is burned and then buried. After harvesting, re-plow the ground for the second planting, harvest again after 2 months, and harvest 3-4 times a year; after 10 harvests, the active manganese content in the surface soil (0-20 cm) drops to 121 mg / kg. After the restoration, the manganese poison in the plot is basically eliminated, and the vegetab...

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PUM

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Abstract

The invention discloses a phytoremediation method for eliminating manganese toxicity in soil. According to the method, wild Celosia argentea Linn. is planted into acidic soil with manganese toxicity, active manganese in the soil is absorbed by the aid of the superstrong enrichment capacity of the Celosia argentea Linn. on the manganese, and excessive manganese in the soil is removed by harvesting the overground part of the Celosia argentea Linn.. The phytoremediation method for eliminating the manganese toxicity in the soil has the advantages of low cost, simplicity in operation, low energy consumption, easiness in maintenance, high removal rate, environment beautification effect and the like, and can be applied to restoration of soil with manganese toxicity in the South of China. The active manganese of the restored soil is remarkably reduced and the manganese toxicity is obviously relieved or eliminated.

Description

technical field [0001] The invention relates to a method for phytoremediation of manganese-contaminated soil, specifically utilizing manganese to enrich plant materials—— Celosia argentea Linn.) Methods to remove manganese poisoning from soil. Background technique [0002] Manganese toxicity is an important factor restricting plant growth in acidic and waterlogged soils. Soil manganese poisoning not only causes the decline of crop yield and quality, but even threatens human health through the food chain (Zang Xiaoping, "Soil Bulletin", Vol. 30, No. 3, pp. 139-144, 1999). Excessive intake of manganese can cause different degrees of damage to human nervous, reproductive, respiratory and other systems (Boudissa et al., "Science of the Total Environment" 2006, Vol. 361, pp. 67-72). China is the world's largest producer of manganese products, and the output of electrolytic manganese accounts for more than 95% of the world's total output. The acidic soil in my country accounts...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B09C1/00
Inventor 刘杰张学洪朱义年
Owner GUILIN UNIVERSITY OF TECHNOLOGY
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