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Agent for phytoremediation of soil polluted by heavy metals using the waste active Sludge as the original material and the method of the phytoremediation of soil polluted by heavy metals

A technology for polluted soil and residual activity, applied in the restoration of polluted soil and other directions, can solve the problems of high cost, complexity, secondary pollution operation, etc., and achieve the effects of low cost, reduction in quantity, and simple extraction method.

Inactive Publication Date: 2009-09-02
HARBIN INST OF TECH
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to solve the problems of high cost, easy to cause secondary pollution and complicated operation in the current heavy metal-contaminated soil remediation method, and to provide a heavy metal-contaminated soil remediation agent and its extraction method using excess activated sludge as raw material. Its method for repairing heavy metal polluted soil

Method used

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  • Agent for phytoremediation of soil polluted by heavy metals using the waste active Sludge as the original material and the method of the phytoremediation of soil polluted by heavy metals
  • Agent for phytoremediation of soil polluted by heavy metals using the waste active Sludge as the original material and the method of the phytoremediation of soil polluted by heavy metals
  • Agent for phytoremediation of soil polluted by heavy metals using the waste active Sludge as the original material and the method of the phytoremediation of soil polluted by heavy metals

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specific Embodiment approach 1

[0012] Embodiment 1: In this embodiment, the heavy metal polluted soil remediation agent is composed of polysaccharides, proteins, nucleic acids, phosphates, amino acids, humic acid compounds, uronic acids and organic substances required for cell life cycle; wherein polysaccharides account for 25% of the total weight ~35%, protein accounts for 55~65% of the total weight, nucleic acid accounts for 2~5% of the total weight, phosphoric acid accounts for 2~5% of the total weight, amino acids account for 2~5% of the total weight, humic acid compounds account for the total 1-3% of the weight, uronic acid accounts for 1-3% of the total weight, and the rest is the organic matter required by the cell life cycle.

[0013] The heavy metal-contaminated soil remediation agent of this embodiment is in the form of powder, easily soluble in water, and its aqueous solution has good fluidity in soil and has no toxic effect.

[0014] see figure 1 with figure 2 It can be seen that the main con...

specific Embodiment approach 2

[0015] Specific embodiment two: In this embodiment, polysaccharides account for 28-32% of the total weight, proteins account for 58-62% of the total weight, nucleic acids account for 2.5-4.5% of the total weight, phosphoric acid accounts for 2.5-4.5% of the total weight, and amino acids account for 2.5-4.5% of the total weight. 2.5-4.5% of the total weight, humic acid compounds account for 1.5-2.5% of the total weight, uronic acid accounts for 1.5-2.5% of the total weight, and the rest are organic substances required by the cell life cycle. Others are the same as in the first embodiment.

specific Embodiment approach 3

[0016] Specific embodiment three: In this embodiment, polysaccharides account for 30% of the total weight, proteins account for 60% of the total weight, nucleic acids account for 2% of the total weight, phosphoric acid accounts for 2% of the total weight, amino acids account for 2% of the total weight, and The phytic acid compound accounts for 1.5% of the total weight, the uronic acid accounts for 1.5% of the total weight, and the organic matter required by the cell life cycle accounts for 1.0% of the total weight. Others are the same as in the first embodiment.

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Abstract

A heavy metal-polluted soil remediation agent using excess activated sludge as a raw material, an extraction method thereof, and a method for remediating heavy metal-contaminated soil relate to a heavy metal-contaminated soil remediation agent, a preparation method thereof, and a method for remediating heavy metal-contaminated soil. It solves the problems of high cost, easy to cause secondary pollution and complicated operation in the current heavy metal-contaminated soil remediation method. Heavy metal contaminated soil remediation agent is composed of polysaccharide, protein, nucleic acid, phosphoric acid, amino acid, humic acid compound, uronic acid and organic matter required for cell life cycle. The method for extracting the heavy metal-contaminated soil remediation agent is as follows: react the residual activated sludge from wastewater treatment at 80-120kPa and 60-100°C for 8-20 minutes; then centrifuge at a speed of 5000-7000r / min for 8-20 minutes.

Description

technical field [0001] The invention relates to a heavy metal polluted soil remediation agent, a preparation method thereof and a method for remediating heavy metal polluted soil, belonging to the field of soil pollution control in environmental protection. Background technique [0002] Soil is the fertile and loose surface of the earth that can grow plants. It is a necessary means of production for human survival and development, and it is also the most basic, important, and irreplaceable natural resource for human society. Therefore, the protection of soil environment has attracted attention. extensive attention. Among soil pollutants, heavy metal pollution is a typical class of priority pollutants. Many environmental hazards, such as the bone pain disease in Japan (1931-1972), were caused by heavy metal pollution, which is very important for the restoration of heavy metal-contaminated soil. At present, the average annual emissions of 15,000 tons of mercury, 3.4 million ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B09C1/00
Inventor 田禹郑蕾左薇
Owner HARBIN INST OF TECH
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