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A kind of electrolytic manganese polluted site soil stabilization restoration agent and its restoration method

A technology of repairing agent and repairing method, which is applied in the field of soil stabilization repairing agent and its restoration in electrolytic manganese polluted sites, which can solve the problems of poor continuity of repairing effect, long bioremediation period, and susceptibility to environmental influences, and achieve the reduction of various metals. Active state concentration, fast repair effect, and difficult migration effect

Active Publication Date: 2020-04-17
HUNAN JINLV ENVIRONMENTAL PROTECTION CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] The purpose of the present invention is to provide a soil stabilization and restoration agent and its restoration method for electrolytic manganese polluted sites, which can effectively solve the existing problems of long bioremediation period, insufficient treatment depth and vulnerability to environmental influences; Fix the problem of poor persistence

Method used

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  • A kind of electrolytic manganese polluted site soil stabilization restoration agent and its restoration method
  • A kind of electrolytic manganese polluted site soil stabilization restoration agent and its restoration method
  • A kind of electrolytic manganese polluted site soil stabilization restoration agent and its restoration method

Examples

Experimental program
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Effect test

Embodiment 1

[0028] In this example, the soil of an electrolytic manganese-contaminated site in Hunan is selected, and its pollution characteristics are Mn, Pb, and Cd composite polluted soil, with a pH of 8.3, a leaching concentration of Mn of 2.1 mg / L, Pb of 0.12 mg / L, and Cd of 0.01 mg / L.

[0029] The composition of the stabilized restoration agent in this embodiment is: 20% lime, 30% sodium sulfide, 40% sodium dihydrogen phosphate, and 10% bentonite.

[0030] A method for repairing electrolytic manganese-contaminated site soil, the method comprising the following steps:

[0031] (1) Break the polluted soil to a particle size ≤ 5cm;

[0032] (2) According to the degree of soil pollution, the amount of stabilizing and repairing agent should be determined as 1%. Take 50% of the added amount of the stabilized restoration agent and mix it with the contaminated soil for 5 minutes to obtain the contaminated soil agent mixture;

[0033] (3) Take 50% of the added amount of the stabilizing re...

Embodiment 2

[0040] In this example, the soil of an electrolytic manganese-contaminated site in Hunan is selected, and its pollution characteristics are Mn, Pb, and Cd composite polluted soil, with a pH of 6.8, a leaching concentration of Mn of 7.78 mg / L, Pb of 0.34 mg / L, and Cd of 0.032 mg / L.

[0041] The composition of the stabilized restoration agent in this embodiment is: 25% lime, 30% sodium sulfide, 35% sodium dihydrogen phosphate, 5% bentonite, and 5% magnesium oxide.

[0042] A method for repairing electrolytic manganese-contaminated site soil, the method comprising the following steps:

[0043] (1) Break the polluted soil to a particle size ≤ 5cm;

[0044] (2) According to the degree of soil pollution, the addition amount of stabilized restoration agent is determined to be 3%. Take 50% of the added amount of the stabilized restoration agent and mix it with the contaminated soil for 5 minutes to obtain the contaminated soil agent mixture;

[0045](3) Take 50% of the added amount...

Embodiment 3

[0052] In this example, the soil of an electrolytic manganese-contaminated site in Hunan is selected, and its pollution characteristics are Mn, Pb, Zn, and Cd compound-contaminated soil, with a pH of 4.7, a leaching concentration of Mn of 52.6 mg / L, and a concentration of Pb of 1.43 mg / L. Zn is 2.3mg / L, and Cd is 0.069mg / L.

[0053] The composition of the stabilized restoration agent in this embodiment is: lime 25%, sodium sulfide 35%, sodium dihydrogen phosphate 25%, bentonite 7%, magnesium oxide 8%.

[0054] A method for repairing electrolytic manganese-contaminated site soil, the method comprising the following steps:

[0055] (1) Break the polluted soil to a particle size ≤ 5cm;

[0056] (2) According to the degree of soil pollution, the amount of stabilizing and repairing agent should be determined as 10%. Take 50% of the added amount of the stabilized restoration agent and mix it with the contaminated soil for 5 minutes to obtain the contaminated soil agent mixture;

...

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Abstract

The invention discloses an electrolytic manganese polluted site soil stabilizing repairing agent and a repairing method thereof. The electrolytic manganese polluted site soil stabilizing repairing agent includes, by mass percent, 3%-45% of lime, 5%-55% of sodium sulfide, 0%-50% of monosodium phosphate, 0%-15% of bentonite and 0%-20% of magnesium oxide. The repairing method includes the steps that electrolytic manganese polluted site soil is subjected to air drying, breaking and screening; the repairing agent is added into the screened soil, and stirring and even mixing are conducted; the evenly-mixed soil is put into a curing area to be cured for 1 day to 6 days, and the water content of the soil in the curing period is maintained between 30% and 70%; and the soil qualified after curing is back filled into an original site. By means of the repairing method, operation is simple, the influences to the environment are little, the function of the stabilizing repairing agent can be sufficiently achieved, the activity state concentration of various kinds of metal in the electrolytic manganese polluted site is effectively reduced, stable combination can be maintained for a long time, and migration is not likely to happen.

Description

technical field [0001] The invention belongs to the technical field of heavy metal soil remediation, and in particular relates to a soil stabilization and remediation agent for electrolytic manganese polluted sites and a remediation method thereof. Background technique [0002] my country's manganese ore resources are rich and diverse. Huayuan County in Hunan Province, Songtao County in Guizhou Province, and Xiushan County in Chongqing City are one of the famous manganese ore producing areas in the country, known as the "Manganese Triangle". Electrolytic manganese metal is the main industry in this area. The regional economy has developed rapidly due to the rise of the electrolytic manganese industry, which has contributed a lot to the prosperity of the regional society; but at the same time of promoting economic and social development, due to the backward technology and extensive production at that time, in the process of electrolytic manganese production, no It is avoidabl...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B09C1/08C09K17/08
CPCB09C1/08C09K17/08
Inventor 程晖
Owner HUNAN JINLV ENVIRONMENTAL PROTECTION CO LTD
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