Mixed reinforcer for reinforcing repair of nightshade on composite contaminated soils and application thereof

A technology for compound pollution and contaminated soil, applied in the field of phytoremediation, can solve the problems of long restoration period and biological characteristics, and achieve the effect of improving restoration efficiency and best treatment effect

Inactive Publication Date: 2011-05-18
SHENYANG INST OF APPLIED ECOLOGY - CHINESE ACAD OF SCI
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Problems solved by technology

However, phytoremediation technology also has some defects and limitations, such as being easily affected by ...

Method used

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  • Mixed reinforcer for reinforcing repair of nightshade on composite contaminated soils and application thereof
  • Mixed reinforcer for reinforcing repair of nightshade on composite contaminated soils and application thereof
  • Mixed reinforcer for reinforcing repair of nightshade on composite contaminated soils and application thereof

Examples

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Embodiment

[0009] Example EGTA, citric acid and salicylic acid mixed solution to strengthen the restoration of cadmium-polycyclic aromatic hydrocarbons complex polluted vegetable soil

[0010] Test materials: The cadmium-PAH compound polluted soil used in the pot test was a vegetable field that had been irrigated with petroleum sewage for many years in the Shenfu Irrigation District of Fushun City. The soil type is yellow brown soil, its physical and chemical properties are pH 6.8, organic matter 18.05mg / kg, total N 1.39mg / kg, total P 1.43mg / kg, available K 148.35mg / kg.

[0011] The average total cadmium content in the soil is 0.85mg / kg, which exceeds the level 2 standard of the national soil environmental quality GB15618-1995, and belongs to cadmium-polluted vegetable field soil. In the collected soil, the total amount of the 16 priority control PAHs announced by the U.S. Environmental Protection Agency is 1.174g / kg, the content of 2-4 ring PAHs is 0.856mg / kg, and the content of 5-6 rin...

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Abstract

The invention relates to a phytoremediation technology of cadmium-polycyclic aromatic hydrocarbon composite contaminated soils, and in particular relates to a mixed reinforcer for reinforcing repair of nightshade on composite contaminated soils and an application thereof. The reinforcer is composed of the following components of EGTA (ethylene glycol tetraacetic acid), citric acid and salicylic acid with the molar ratio of (0.1-1.0): (0.5-5.0): (0.1-1.0). The reinforcer is added into heavy metal-polycyclic aromatic hydrocarbon composite contaminated soils planted with hyperaccumulators and/ or accumulators. The citric acid and the salicylic acid are mixed to be dissolved into water to serve as the reinforcer; then, the reinforcer is applied in the heavy metal-polycyclic aromatic hydrocarbon composite contaminated soils planted with hyperaccumulators and/or accumulators, especially contaminated soils planted with nightshade; when the nightshade is mature, plants and soil samples are collected and are compared with those in which the reinforcer is not applied; the result shows that the processing effect is better if the reinforcer is applied, and the upper Cd extraction ratio of the nightshade is improved by 42.6%; and meanwhile, the removal rate of the polycyclic aromatic hydrocarbon of the soils can reach 25.3%, and the repair efficiency is obviously improved.

Description

technical field [0001] The invention relates to a phytoremediation technology for cadmium-polycyclic aromatic hydrocarbon compound polluted soil, in particular to a mixed enhancer for strengthening nightshade to repair compound polluted soil and its application. Background technique [0002] With the diversification, complexity and frequency of pollutant discharge, the main receptor soil of pollutants is increasingly polluted, and the complexity and refractory characteristics of contaminated soil remediation are also becoming more prominent (Reference 1: Paton GI, Viventsova E, Kumpene J, et al.2006.Anetotoxicity assessment of contaminated forest soils from the Kola Peninsula.Science of the Total Environment, 355(13):106-117), wherein heavy metal-organic compound pollution is a more common pollution type, Such as Cd-polycyclic aromatic hydrocarbons (Polycyclic aromatic hydrocarbons, PAHs) complex pollution. At lower concentrations, cadmium can inhibit plant growth and produ...

Claims

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Application Information

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IPC IPC(8): B09C1/00B09C1/10
Inventor 魏树和胡亚虎周启星牛荣成
Owner SHENYANG INST OF APPLIED ECOLOGY - CHINESE ACAD OF SCI
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