Process for repairing arsenic pollution in soil by using biological method

A technology for remediating soil and arsenic pollution is applied in the field of soil arsenic pollution remediation, achieving the effects of broad application prospects, increased adsorption sites, and improved hydrophobicity

Active Publication Date: 2017-07-25
江西源春环保科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] In order to overcome the defects of the soil arsenic pollution remediation method in the prior art, the present invention provides a process for remediating soil arsenic pollution using biological methods

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] A process for remediating soil arsenic pollution by biological methods, comprising the following steps:

[0026] First, the arsenic-contaminated soil is plowed, air-dried, crushed, and the particle size is controlled to be less than 2mm, then sprayed with water to keep the soil moisture content at 30wt%, and then the microbial preparation is spread according to the addition of 100g of microbial preparation per ton of soil, and the third Every day, plow the soil once, and then spread the microbial preparation at an amount of 50g of microbial preparation per ton of soil; the restoration time is one week.

[0027] The microbial preparation is prepared according to the following steps:

[0028] Add the same weight of hydrochloric acid solution with a mass fraction of 12% to attapulgite, stir at 300rpm for 20min, then add sodium dodecylsulfonate and 5% by weight of attapulgite, 200rpm Stir for 60 minutes, then centrifuge to collect the precipitate; crush the wheat straw wit...

Embodiment 2

[0038] A process for remediating soil arsenic pollution by biological methods, comprising the following steps:

[0039] First, the arsenic-contaminated soil is plowed, air-dried, crushed, and the particle size is controlled to be less than 2mm, then sprayed with water to keep the soil moisture content at 30wt%, and then the microbial preparation is spread according to the addition of 100g of microbial preparation per ton of soil, and the third Every day, plow the soil once, and then spread the microbial preparation at an amount of 50g of microbial preparation per ton of soil; the restoration time is one week.

[0040] The microbial preparation is prepared according to the following steps:

[0041] Add the same weight of hydrochloric acid solution with a mass fraction of 12% to attapulgite, stir at 300rpm for 20min, then add sodium dodecylsulfonate and 5% by weight of attapulgite, 200rpm Stir for 60 minutes, then centrifuge to collect the precipitate; crush the wheat straw with ...

Embodiment 3

[0051] 1. Verification of the compatibility and synergistic arsenic removal effect of each bacterial strain in the process of the present invention:

[0052] Select the arsenic content of the soil sample to be 150mg / kg; the processing flow is the same as in Example 1;

[0053] The microbial preparations of each group are respectively: Test group: Example 1 group; Control 1: without adding Bacillus licheniformis, others are the same as in Example 1; Control 2: without adding Pseudomonas mendoza, others are the same as in Example 1 ; Control 3 does not add Nocardia corals, others are the same as Example 1; Control 4: do not add Arthrobacter crystals, others are the same as Example 1; Control 5: Do not add Pseudomonas aeruginosa, others are the same as Example 1 ; Control 6: do not add Clostridium papersolubles, others are the same as in Example 1; the specific results are shown in Table 1:

[0054] Table 1

[0055] group test group Control 1 Control 2 Control ...

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PUM

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Abstract

The invention belongs to the technical field of environmental protection, and discloses a process for repairing arsenic pollution in soil by using a biological method. The process comprises the following steps: turning over, airing and smashing soil polluted by arsenic at first; controlling the grain size of the soil to be smaller than 2 mm; then spraying water; keeping the water content of the soil at 30wt%; and spreading a microbial preparation by adding 100 g of the microbial preparation in every ton of soil, turning over the soil once again three days later, and spreading the microbial preparation by adding 50 g of the microbial preparation in every ton of soil, wherein the repairing time lasts for one week. The repairing method is simple and easy to operate, low in repairing cost, environmentally friendly and pollution-free, and can be applied to large-scale soil polluted by arsenic.

Description

technical field [0001] The invention belongs to the technical field of environmental protection, and in particular relates to a technique for repairing soil arsenic pollution by using a biological method. Background technique [0002] Arsenic pollution refers to environmental pollution caused by arsenic or its compounds. The mining and smelting of arsenic and arsenic-containing metals, the production of glass, pigments, technical materials, and paper using arsenic or arsenic compounds as raw materials, and the burning of coal can all produce arsenic-containing waste water, waste gas and waste residue, which will pollute the environment . In addition to natural causes such as rock weathering and volcanic eruptions, atmospheric arsenic pollution mainly comes from industrial production, the use of arsenic-containing pesticides, and coal combustion. Wastewater containing arsenic, pesticides and smoke will pollute the soil. Arsenic accumulates in the soil and thus enters crop ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B09C1/10C09K17/40C09K101/00
CPCB09C1/105B09C2101/00C09K17/40C09K2101/00
Inventor 不公告发明人
Owner 江西源春环保科技有限公司
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