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Method for repairing heavy metal Pb and Cd contaminated soil by water spinach combined with organic substrate

A technology of organic matrix and polluted soil, applied in the restoration of polluted soil, etc., can solve the problems of unstable remediation effect and low remediation efficiency of heavy metal-contaminated soil, and achieve waste reuse, good stabilization effect and improvement of soil quality Effect

Inactive Publication Date: 2018-11-16
陕西地建土地工程技术研究院有限责任公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] Aiming at the defects and deficiencies in the prior art, the present invention provides a method for remediating heavy metal Pb and Cd contaminated soil with water spinach combined with an organic matrix, which overcomes the defects of low remediation efficiency and unstable remediation effect of the existing remediation method for heavy metal contaminated soil

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  • Method for repairing heavy metal Pb and Cd contaminated soil by water spinach combined with organic substrate
  • Method for repairing heavy metal Pb and Cd contaminated soil by water spinach combined with organic substrate
  • Method for repairing heavy metal Pb and Cd contaminated soil by water spinach combined with organic substrate

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Embodiment 1

[0036] The present embodiment provides a kind of water spinach joint organic matrix repair method for heavy metal Pb and Cd contaminated soil, the method adopts water spinach joint organic matrix adsorption of Pb and Cd ions in the polluted soil, wherein, the organic matrix is ​​calculated by parts by weight. Made from the following raw materials: 8 parts of peat soil, 1 part of vermiculite, 1 part of perlite, 1 part of straw, 1 part of carbonized grain, 1 part of wine lees; the method comprises the following steps:

[0037] Step 1: Add the organic matrix to the contaminated soil according to the ratio of organic matrix:soil weight ratio of 1:100, then plow the surface soil to fully mix the organic matrix and soil, and let it stand for a week to stabilize;

[0038] Step 2: Leveling the land, arranging the land into a field with a length × width of 20m × 1m (the field can be arranged according to the actual situation), and forming ridges on both sides of the field;

[0039] Ste...

Embodiment 2

[0042] The soil samples in this embodiment are exactly the same as in Example 1, and the heavy metal Pb and Cd in the soil samples are removed by the same method as in Example 1. The difference is that the organic matrix of this embodiment is calculated in parts by weight, consisting of the following raw materials Made: peat moss: 7 parts; vermiculite: 1 part; perlite: 1 part; straw: 1 part; carbonized grain: 1 part; wine residue: 1 part.

Embodiment 3

[0044] The soil samples in this embodiment are exactly the same as in Example 1, and the heavy metal Pb and Cd in the soil samples are removed by the same method as in Example 1. The difference is that the organic matrix of this embodiment is calculated in parts by weight, consisting of the following raw materials Made: peat soil: 9 parts; vermiculite: 1 part; perlite: 1 part; straw: 1 part; carbonized grain: 1 part; wine residue: 1 part.

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Abstract

The invention discloses a method for repairing heavy metal Pb and Cd contaminated soil by water spinach combined with an organic substrate. The method uses the combination effect of water spinach andthe organic substrate to adsorb and enrich Pb and Cd ions in the contaminated soil, wherein the organic substrate is prepared from the following raw materials by weight: 7 to 10 parts of peat soil, 1to 2 parts of vermiculite, 1 to 2 parts of perlite, 1 to 2 parts of straws, 1 to 2 parts of carbonized grains, and 1 to 2 parts of wine residue. The water spinach is combined with the organic substrate to adsorb and enrich the Pb and Cd ions in the contaminated soil, the added organic substrate can promote the conversion of Pb and Cd into an exchangeable state, and promotes the efficiency of plantabsorption and improve the physical state of the soil and plant habitats, the method has significant enrichment and transfer effects on heavy metals such as the Pb and Cd in the soil, and has low cost for in-situ remediation of the Pb and Cd contaminated soil, low time, simple operation, high repair rate and good stability, and waste recycling can be achieved.

Description

technical field [0001] The invention belongs to the technical field of reclamation and field restoration, and relates to a method for remediating heavy metal Pb and Cd polluted soil, in particular to a method for remediating heavy metal Pb and Cd polluted soil with water spinach and an organic matrix. Background technique [0002] According to the National Soil Pollution Survey Bulletin released in April 2014, the overall soil environment in the country is not optimistic. The pollution type is mainly inorganic pollution, and the number of points exceeding the standard accounts for 82.8% of the total number of points exceeding the standard. Judging from the situation of pollutants exceeding standards, Pb and Cd two kinds of inorganic pollutants point exceeding standards were 7.0% and 1.5%, respectively, ranking in the forefront of heavy metal pollution. [0003] Soil heavy metals Pb and Cd enter human and animal bodies through the food chain, often causing irreversible damage...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B09C1/08B09C1/10
CPCB09C1/08B09C1/105B09C2101/00
Inventor 李刚卢楠王启龙魏样孙婴婴罗玉虎
Owner 陕西地建土地工程技术研究院有限责任公司
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