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Soil remediation method for removing heavy metal lead

A soil remediation and heavy metal technology, applied in the restoration of polluted soil, etc., can solve problems such as large technical limitations, serious ecological impact, and few plant species, and achieve good treatment effect, strong selectivity, and low design and construction costs. Effect

Inactive Publication Date: 2016-09-28
朱辉
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, few plant species are available, so there are limitations in governance
[0008] At present, existing soil heavy metal lead pollution control technologies generally have shortcomings such as high cost, low efficiency, serious ecological impact, and large technical limitations.

Method used

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  • Soil remediation method for removing heavy metal lead
  • Soil remediation method for removing heavy metal lead

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Embodiment Construction

[0024] Such as figure 1As shown, a soil remediation method for removing heavy metal lead, the soil containing heavy metal lead to be repaired is stored in the original soil hopper 1, where it is collected centrally and the preliminary stabilization process is completed, the soil to be repaired in the original soil hopper 1 It is transported to the blast separator 2 through the screw lifting conveyor, where low-density and large-volume debris such as plastics and paper in the soil are removed. The outlet of the blast separator 2 is connected to the vibrating screening machine 3 through a conveyor belt. To remove impurities with higher density and large particle size in the soil, the outlet of the vibrating screener 3 is connected to the magnetic screener 4 through a conveyor belt, where metal impurities in the soil are removed, and the outlet of the magnetic screener 4 is connected to the grinder 5 through a conveyor belt. Here the soil is ground to a particle size less than 10...

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Abstract

The invention discloses a soil remediation method for removing heavy metal lead. According to the method, the biological fermentation characteristic of gluconobacter oxydans is creatively utilized; lactonization reaction is conducted in the gluconobacter oxydans in presence of D-sorbitol and various sorts of nutritional ingredients inherent in soil, and finally L-ascorbic acid (vitamin C) is produced through fermentation; and then the L-ascorbic acid can be bonded with the heavy metal lead to produce non-toxic inorganic salt with the density being obviously larger than that of soil particles, and the heavy metal lead can be separated and removed from the soil through vibration sorting operation. Meanwhile, by the adoption of the L-ascorbic acid produced in the way that the D-sorbitol participates in biological fermentation reaction, the cost is far lower than that of adding L-ascorbic acid into the soil directly, and the material cost of soil remediation treatment can be greatly reduced.

Description

technical field [0001] The invention relates to a soil restoration method for removing heavy metal lead in soil, and belongs to the field of soil restoration in environmental protection. Background technique [0002] With the growth of the global population and the acceleration of industrialization, the protection of soil and the environment and the sustainable development of agriculture have become important issues facing human beings in the world today. Heavy metals are the main soil inorganic pollutants, and the pollution of heavy metals is irreversible. In the past two decades, people have conducted extensive research on the pollution of soil ecological environment by heavy metals introduced through different ways. [0003] Lead is one of the common heavy metal elements in nature, and it is also one of the important polluting heavy metal elements. Lead is a non-essential element for humans, animals, and plants. Lead in soil is divided into natural sources and man-made ...

Claims

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Application Information

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IPC IPC(8): B09C1/00B09C1/02B09C1/08B09C1/10
CPCB09C1/00B09C1/02B09C1/08B09C1/105
Inventor 朱辉
Owner 朱辉
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