Method for restoring mine soil phosphorus pollution

A technology for phosphorus pollution and soil, applied in the field of remediation of phosphorus pollution in mine soil, can solve the problems of high cost, limitation, large financial and material resources, etc., and achieve the effect of simplifying operation, avoiding annual planting, and reducing phosphorus content.

Inactive Publication Date: 2010-08-11
SICHUAN AGRI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Rich in Al 3+ , Fe 3+ 、C 2+ The matrix (steel slag) has a significant phosphorus removal effect, but it is limited to the characteristics of the material itself and cannot be widely used
Therefore, this treatment method is not only costly, but also cannot fundamentally solve the problem of phosphorus pollution, which is greatly limited in practical application.
So far, there is no simple method to remove phosphorus from the soil phosphorus-polluted environment, and using chemical and physical methods to remove phosphorus in the soil requires a lot of financial and material resources

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0013] The invention relates to a method for repairing phosphorus pollution of mine soil, which involves planting sarcophagus in the phosphorus-polluted mine soil. Plant the cold water flowers directly or grow the seeds directly. Coarse-toothed cold water flowers have strong vitality and do not need special management during their growth process, so the cost is very low and the operability is strong.

[0014] The above-ground part of the plant can be harvested by regularly stubbing the planted cold water flower with coarse teeth, and planted every year, which simplifies the operation and reduces the phosphorus content in the mine soil.

[0015] Present embodiment is the method for repairing the phosphorus pollution of mine soil, and concrete way is:

[0016] The sampling area is located at the Jinhe Phosphate Mine (104°50′E, 30°25′N) in Hongbai Town, Shifang City (one of the four largest phosphate mines in China). , samples were taken at maturity, and the phosphorus content ...

Embodiment 2

[0018] In this example, the cold water flower with thick teeth was used as the experimental material, and the indoor pot test was used to further verify its advantages in repairing soil phosphorus pollution and its corresponding physiological mechanism.

[0019] After 9 weeks of growth, the phosphorus content of the leaves of P. japonica increased significantly with the increase of soil phosphorus concentration, and the phosphorus content of the leaves was 2.96-6.20g kg -1 (DW). With the prolongation of the growth period, the biomass of the cold water flower showed an increasing trend, at 200mg P kg -1 , the biomass content reached the maximum value, while the phosphorus accumulation in the shoots of L. japonicus increased sharply, with an increase range of 7.7-46.15%. Phosphorus content in shoots of Coarse-toothed Lengshuihua did not reach 16.23g kg -1 , because the total phosphorus content of the pot test soil is only 1% of the total phosphorus content of the mining area s...

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Abstract

The invention relates to a biological restoring method of phosphorus pollution, in particular to a method for restoring mine soil phosphorus pollution, which is characterized in that pilea sinofasciata is planted in the phosphor polluted mine soil, the pilea sinofasciata is directly planted, or the seeds of the pilea sinofasciata are directly seeded for growth, and the planted pilea sinofasciata carries out regular mulchtillage for harvesting overground parts of the plants. The invention utilizes the characteristics that the pilea sinofasciata can enrich the phosphor, the pilea sinofasciata is transplanted or the seeds of the pilea sinofasciata are directly seeded in the mine soil for absorbing the phosphor accumulated in the mine soil and transporting most of the phosphor to the overground parts to reduce the phosphor content in the mine soil, carrying out mulchtillage harvesting for continuous extraction when the overground parts form a certain biomass, the roots of the pilea sinofasciata can continuously survive and grow after the overground parts of the plants carry out mulchtillage harvesting, the annual planting can be avoided, the operation is simplified, and the phosphor content in the polluted soil can be effectively reduced, so the goal of restoring the pollution soil is reached.

Description

technical field [0001] The invention relates to a bioremediation method for phosphorus pollution, in particular to a method for remediating phosphorus pollution in mine soil. Background technique [0002] Phosphorus is one of the key nutrients that stimulate the growth of algae and other photosynthetic aquatic organisms, and may eventually induce eutrophication in water bodies. Phosphorus is considered one of the main inducing factors for eutrophication in water bodies. Due to its greater risk of negative impact on the water environment, it is urgent to reduce the excess phosphorus content in water to normal levels. Therefore, the removal of high levels of phosphorus in polluted water or soil is of great significance for controlling water eutrophication. Using lime, ferric chloride, alum and other chemical amendments to reduce the phosphorus content in polluted soil is currently the most used method. Traditional chemical repair methods cannot fundamentally prevent or remove...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B09C1/00B09C1/10
Inventor 李廷轩郑子龙王永东余海英张锡洲黄霞
Owner SICHUAN AGRI UNIV
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