Method for restoring cadmium-terramycin combinedly contaminated soil through combination of plant and degrading bacterium

A combined pollution and joint repair technology, applied in the field of repairing contaminated soil, can solve the problem of not much soil contaminated by antibiotics, and achieve the effect of strong plant growth, easy operation, and no secondary pollution

Inactive Publication Date: 2015-12-30
SHENYANG UNIV
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Problems solved by technology

There are still few studies on the joint toxic effect between antibiotics and heavy metals, and there are not many studies on the remediation of antibiotic-contaminated soil, and there are few reports on the remediation of antibiotic-heavy metal-contaminated soil

Method used

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  • Method for restoring cadmium-terramycin combinedly contaminated soil through combination of plant and degrading bacterium

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Experimental program
Comparison scheme
Effect test

Embodiment

[0014] Embodiment: pot experiment

[0015] The specific implementation steps are as follows:

[0016] 1) The soil for testing is meadow brown soil. According to the concentration of pollutants shown in Table 1, cadmium and oxytetracycline single and compound polluted soils with different pollution loads are self-made, and 1.00kg of cadmium and oxytetracycline compound polluted soil are loaded into each pot. , planting Peacock Grass ( tagetespatula L.) or Mirabilis ( mirabilisjalapa L.) seeds, after the seeds germinate for 10 days, keep 2 seedlings in each pot, and inoculate 10 ml of oxytetracycline high-efficiency degradation bacteria liquid in the rhizosphere soil of the plants.

[0017] Table 1 Concentrations of cadmium and oxytetracycline in soil with different treatments (mg kg -1 )

[0018] Processing number Cd Oxytetracycline Bacteria plant Processing number Cd Oxytetracycline Bacteria plant 1 0 0 - Mirabilis 13 0 0 - pea...

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Abstract

The invention relates to a restoration method for contaminated soil and provides a method for restoring cadmium-terramycin combinedly contaminated soil through a combination of a plant and a degrading bacterium. According to the method, pot experiment is carried out; each pot is filled with cadmium-terramycin combinedly contaminated soil, and then seeds of maidenhair or Mirabilis jalapa are sowed in the soil; after germination of the seeds, root-irrigation and inoculation of a bacterial liquid of a high-efficiency terramycin degrading bacterium are carried out on soil where plate roots are located; greenhouse cultivation is employed, and when plants are in maturity period, the plants are totally removed from the contaminated soil; and the plants are repeatedly planted a plurality of times until pollutants in the soil reach soil environment safety standards. The restoration plants of maidenhair or Mirabilis jalapa grow vigorously, have a good ornamental value and shows good capacity in enriching cadmium; and the method has the characteristics of low cost, easiness in operation, no secondary pollution and capacity of beautifying the environment and is of important theoretical and practical significance to prevention and treatment of antibiotic and heavy metal contamination of soil and to safe production of agricultural products.

Description

technical field [0001] The invention relates to a method for remediating polluted soil, in particular to a method for jointly remediating cadmium and oxytetracycline compound polluted soil by plants and degrading bacteria. Background technique [0002] With the diversification, complexity and frequency of pollutant discharge, the soil, the main receptor of pollutants, is becoming more and more polluted, and the pollution form of soil also changes from a single pollution caused by a certain pollutant to two or more pollutants. The direction of compound pollution formed by the interaction of pollutants is transformed. With sewage irrigation and land use of livestock and poultry manure, a large number of antibiotics and heavy metals coexist and interact in the soil environment. Due to the extensive use of antibiotics and heavy metals as feed additives in the livestock and poultry farming industry, a typical environment of heavy metal and antibiotic cross-contamination has form...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B09C1/00B09C1/10
CPCB09C1/105
Inventor 陈苏陈宁晁雷孙丽娜郝芯欣马鸿岳刘芹蒲涵
Owner SHENYANG UNIV
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