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Preparation method of nano calcium silicate composite soil repair liquid and treatment method of soil contamination thereof

A nano-calcium silicate and soil remediation technology, which is applied in the field of soil pollution control and preparation of nano-calcium silicate composite soil remediation solution, can solve the problems of inability to improve soil acidity, high cost of soil remediation, and complicated remediation methods. , to achieve the effect of reducing bioavailability, low cost, and active migration

Active Publication Date: 2019-03-19
四川天净纳米科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0006] In the above-mentioned prior art, the method for remediating soil heavy metal pollution by using hydrated calcium silicate obtained by processing silicon tetrachloride can achieve a certain effect of heavy metal remediation, but the remediation method is complicated and is not conducive to field operations. At the same time, the soil remediation The cost is relatively high, and it cannot play the role of improving soil acidity

Method used

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  • Preparation method of nano calcium silicate composite soil repair liquid and treatment method of soil contamination thereof

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Embodiment 1

[0032] As a preferred embodiment of the application, this embodiment discloses:

[0033] The preparation method of nano-calcium silicate composite soil remediation fluid comprises hydrolyzing sodium silicate to obtain sodium silicate solution, and using nano-immobilized catalysts to catalyze the sodium silicate solution for 1-2 hours; adding calcium hydroxide to the sodium silicate solution to adjust The pH value is 10-12, sodium silicate and calcium hydroxide react under the catalysis of the nano-immobilized catalyst to generate a composite solution of nano-calcium silicate and sodium hydroxide, and the nano-calcium silicate is suspended in the sodium hydroxide solution In the process, the compound soil remediation solution is obtained. The soil was treated with the remediation solution, and the results of the remediation treatment of heavy metals in the soil are shown in the table below:

[0034]

[0035] The degree of toxicity of soil heavy metals to organisms and the i...

Embodiment 2

[0039] As another preferred embodiment of the present application, this embodiment discloses:

[0040] The preparation method of nano-calcium silicate composite soil remediation fluid comprises hydrolyzing sodium silicate to obtain sodium silicate solution, and using nano-immobilized catalysts to catalyze the sodium silicate solution for 1-2 hours; adding calcium hydroxide to the sodium silicate solution to adjust The pH value is 10-12, sodium silicate and calcium hydroxide react under the catalysis of the nano-immobilized catalyst to generate a composite solution of nano-calcium silicate and sodium hydroxide, and the nano-calcium silicate is suspended in the sodium hydroxide solution In the process, the compound soil remediation solution is obtained. In the process of preparing the sodium silicate solution by hydrolyzing the sodium silicate, the sodium silicate solution can be fully stirred for 10-30 minutes. The hydrolysis process of the hydrolyzed sodium silicate can be ca...

Embodiment 3

[0042] As another preferred embodiment of the present application, this embodiment discloses:

[0043] A method for soil pollution control with nano calcium silicate composite soil remediation fluid, hydrolyzing sodium silicate to obtain a sodium silicate solution, using a nano-immobilized catalyst to catalyze the sodium silicate solution for 1-2 hours; adding hydroxide to the sodium silicate solution Calcium, adjust the pH value to 10-12, sodium silicate and calcium hydroxide react under the catalysis of the nano-immobilized catalyst to produce a composite solution of nano-calcium silicate and sodium hydroxide, the nano-calcium silicate is suspended in hydrogen Sodium oxide solution to obtain a composite soil repair solution; the prepared composite soil repair solution is evenly sprayed on the surface of the soil to be repaired. In the process of preparing the sodium silicate solution by hydrolyzing the sodium silicate, the sodium silicate solution can be fully stirred for 10...

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Abstract

The invention discloses a preparation method of a nano calcium silicate composite soil repair liquid and a treatment method of soil contamination thereof, and relates to the technical field of soil remediation. According to the method, a sodium silicate solution is prepared by hydrolyzing sodium silicate; then the sodium silicate solution is catalyzed by a nano immobilized catalyst for 1-2 hours;and calcium hydroxide is added into the sodium silicate solution, the pH value is adjusted to be 10-12 to react and generate a composite solution of nano calcium silicate and sodium hydroxide, namelythe composite soil repair liquid is obtained, and the repair liquid is sprayed on the surface of the soil to be restored. The preparation method of the composite soil repair liquid is simple to prepare, low in cost, and operation is carried out conveniently in field, the soil to be restored can be directly repaired; and meanwhile, the repairing liquid contains the sodium hydroxide which can neutralize the acidity of the soil, so that the purpose of improving the acidity of the soil is achieved.

Description

technical field [0001] The invention relates to the technical field of soil remediation, and more specifically relates to a preparation method of a nano-calcium silicate composite soil remediation solution, and a method for treating soil pollution by using the nano-calcium silicate composite soil remediation solution. Background technique [0002] With the continuous development of the global economy, soil heavy metal pollution has become a major problem facing the global environmental quality. Human activities (mineral mining, metal smelting, domestic wastewater discharge, use of chemical fertilizers and pesticides, etc.) have greatly accelerated the production of heavy metals on the earth. The chemical cycle makes the heavy metals in the environment continuously increase, which increases the harm of heavy metals to human health. When heavy metals entering the environment exceed their capacity in the environment, heavy metal pollution can occur. Heavy metal pollutants are ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B09C1/08C09K17/12C09K101/00
CPCB09C1/08B09C2101/00C09K17/12C09K2101/00
Inventor 柯杨
Owner 四川天净纳米科技有限公司
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