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Preparation method and application of heavy metal contaminated soil/bottom mud stabilizer

A technology of polluted soil and heavy metals, applied in the restoration of polluted soil, application, soil conditioning materials, etc., can solve the problems of low cost of heavy metal remediation agent, poor stabilization effect of arsenic-containing heavy metal compound polluted sediment, etc., to achieve stabilization Good effect, low cost and low energy consumption

Active Publication Date: 2017-12-08
湖南新九方科技有限公司
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0008] The object of the present invention is to overcome above-mentioned defect, provide a kind of heavy metal polluted soil / bottom mud stabilizer, the heavy metal repairing agent of the present invention is low in cost, can effectively eliminate the harm of heavy metal ions in the soil, and under acidic conditions, it can treat arsenic-containing composite heavy metal polluted bottom The arsenic and other heavy metals in the mud have a good stabilizing effect, so as to realize the deficiency that the existing products have poor stabilizing effect on the compound polluted sediment containing arsenic and heavy metals

Method used

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  • Preparation method and application of heavy metal contaminated soil/bottom mud stabilizer
  • Preparation method and application of heavy metal contaminated soil/bottom mud stabilizer
  • Preparation method and application of heavy metal contaminated soil/bottom mud stabilizer

Examples

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Effect test

Embodiment 1

[0043] (1) Heavy metal pollution belongs to contaminated soil / sediment stabilizer, which is composed of soluble iron salt, dibutyl dithiophosphate and butyl dithiocarbonate in proportion. The specific ingredients are shown in Table 1.

[0044] (2) The use method of heavy metal polluted soil / bottom mud stabilizer, comprises the following steps:

[0045] S1. Pretreatment stones, rhizomes, various newborn bodies and invasive bodies in a channel in Qingshuitang Industrial Zone, Zhuzhou City, which were seriously polluted by heavy metals, after natural air drying, mixed evenly, weighed 500g, and used four Grinding through a 100-mesh sieve by separate method; obtain the mud bottom to be treated;

[0046] S2. under room temperature, add 500g deionized water to the bottom mud to be treated in step S1, and dilute; then add 50g of soluble iron salt (ferrous sulfate 60wt%, ferrous chloride 30wt%, ferrous chloride 10wt%) %), mixed uniformly, reacted for 8h, and had a natural pH value to ...

Embodiment 2

[0050] (1) Heavy metal pollution belongs to contaminated soil / sediment stabilizer, which is composed of soluble iron salt, dibutyl dithiophosphate and butyl dithiocarbonate in proportion. The specific ingredients are shown in Table 1.

[0051] (2) the using method of heavy metal polluted soil / bottom mud stabilizer, its step is identical with embodiment 1, and its difference is:

[0052] In step S2, the soluble iron salt (ferrous sulfate 70wt%, ferrous chloride 30wt%) is 60g, and the reaction time is 8h;

[0053] In step S3, dibutyl dithiophosphate (dibutyl potassium dithiophosphate 50wt%, dibutyl sodium dithiophosphate 30wt%, dibutyl ammonium dithiophosphate 20wt%) is 40g, react The time is 6h;

[0054] In step S4, the amount of butyl dithiocarbonate (50% wt of potassium butyl dithiocarbonate, 50% wt of sodium butyl dithiocarbonate) is 25 g, and the reaction time is 10 h.

Embodiment 3

[0056] (1) Heavy metal pollution belongs to contaminated soil / sediment stabilizer, which is composed of soluble iron salt, dibutyl dithiophosphate and butyl dithiocarbonate in proportion. The specific ingredients are shown in Table 1.

[0057] (2) Belong to the using method of polluted soil / bottom mud stabilizer, its step is identical with embodiment 1, and its difference is:

[0058] In step S2, the soluble iron salt (ferrous sulfate 60wt%, ferric chloride 30wt%, ferrous chloride 10wt%) is 50g, and the reaction time is 10h;

[0059] In step S3, dibutyl dithiophosphate (dibutyl dithiophosphate potassium 70wt%, dibutyl ammonium dithiophosphate 30wt%) is 25g, and the reaction time is 8h;

[0060] In step S4, butyl dithiocarbonate (dibutyl potassium dithiophosphate 70wt%, dibutyl ammonium dithiophosphate 30wt%) is 25g, and the reaction time is 6h.

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Abstract

The invention relates to the technical fields of soil remediation and environmental protection, in particular to a heavy metal contaminated soil / bottom mud stabilizer. The heavy metal contaminated soil / bottom mud stabilizer is prepared from soluble ferric salt, dibutyl dithiophosphate and butyl dithiocarbonate in proportion. A heavy metal repair agent is low in cost, can effectively eliminate harm of heavy metal ions in soil, and has relatively good stabilizing effect on arsenic and other heavy metals in arsenic-containing composite heavy metal contaminated bottom mud under an acid condition, so that the defect that an existing product is poor in stabilizing effect on the arsenic-containing composite heavy metal contaminated bottom mud is overcome. The heavy metal contaminated soil / bottom mud stabilizer can be applied to stabilizing treatment of heavy metal contaminated muddy bottom of arsenic, lead, cadmium, copper, zinc and chromium. The heavy metal contaminated soil / bottom mud treated by the stabilizer can be used for roadbed building filler. The heavy metal contaminated soil / bottom mud stabilizer has the effects of protecting the environment, changing waste into things of value and increasing a waste utilization rate, and has a considerable economic value.

Description

technical field [0001] The invention relates to the technical field of soil restoration and environmental protection, in particular to a preparation method and application of a heavy metal polluted soil / bottom mud stabilizer. Background technique [0002] As a typical toxic element, arsenic has long been regarded as an important object of environmental geochemical research. The difference in the chemical form and valence state of arsenic in the environment will directly lead to the difference in its toxicity. Under normal pollution levels, animals, plants and microorganisms living in the soil will show corresponding damage symptoms. Acute and chronic poisoning will occur when the human body is directly or indirectly exposed to different concentrations of arsenic pollutants. After a sudden major environmental pollution accident, because the concentration of arsenic pollution is as high as hundreds or even thousands, under such conditions, the degree and scope of arsenic's h...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09K17/40B09C1/08
CPCB09C1/08C09K17/40
Inventor 杨添奇纪智慧成一知
Owner 湖南新九方科技有限公司
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