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Soil heavy metal chromium pollution repairing material and making method and application of soil heavy metal chromium pollution repairing material

A technology for repairing materials and heavy metals, which is applied in the field of soil pollution restoration, can solve problems such as unsuitable soil environment media, and achieve the effect of reducing repair costs

Inactive Publication Date: 2018-02-23
CHINESE RES ACAD OF ENVIRONMENTAL SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Adsorption materials especially for heavy metals are generally not suitable for application in soil environmental media

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment

[0040] Mix cement, fine sand and sodium alginate according to the mass ratio of 0.8:0.1-0.2:0.6-1.2 to prepare a stable and solidified adhesive for later use. Weigh 100g of ferroferric oxide, 140g of attapulgite, 50g of sepiolite, and 80g of iron phosphate, put them into a planetary ball mill, and carry out ball milling at a speed of 400r min-1, alternating positive and negative operations every 60min, and the ball milling time is 15- 20h, prepared as a composite adsorbent for use.

[0041] Take 150g of stable and solidified adhesive and 290g of composite adsorbent to fully and evenly mix, spray a certain amount of water to make the mixture wet, put the mixture into an extrusion spheronizer for granulation, and set the extrusion speed to 100r / min , placed to dry under the condition of natural ventilation, the required material can be obtained. It is determined that 85% of the material has a particle size of 1.0mm, and the porosity is 30%-38%.

[0042] Collect contaminated so...

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Abstract

The invention discloses a soil heavy metal chromium pollution repairing material. The soil heavy metal chromium pollution repairing material comprises the following materials by weight percent: 10%-30% of stabilizing and solidifying adhesive, 30%-50% of a composite adsorbent, and the balance of water. The invention also discloses a preparation method of the repairing material. The repairing material adsorbs the Cr material in the soil, is favorable for recycling of the material, realizes the efficient repairing, can be recycled for multiple times, and reduces the repairing cost.

Description

technical field [0001] The invention belongs to the technical category of soil pollution remediation, and in particular relates to a soil heavy metal chromium pollution remediation material. [0002] The invention also relates to a method for preparing the above soil heavy metal chromium pollution restoration material. [0003] The invention also relates to a method for removing heavy metal chromium from soil by using the repair material. technical background [0004] At present, the problem of soil heavy metal pollution in my country is very prominent, especially a large amount of chromium (Cr) polluted sites, which seriously endanger human health. Chromium generally has two valence states in the environment, namely trivalent chromium and hexavalent chromium. The toxicity and mobility of hexavalent chromium in the environment are stronger than that of trivalent chromium. For the restoration of chromium, the highly toxic hexavalent chromium is generally converted into triv...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09K17/40B09C1/08
CPCB09C1/08C09K17/40B01J20/0229B01J20/12B01J20/3042B01J20/28009B01J20/3028B01J20/06B01J2220/42B01J20/2803B01J20/28004B01J20/28054B01J20/28085
Inventor 姜永海席北斗马志飞杨昱廉新颖杨鹊平彭星徐祥健
Owner CHINESE RES ACAD OF ENVIRONMENTAL SCI
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