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Nickel-contaminated soil repairing agent and preparation method thereof

A technology of polluted soil and remediation agent, applied in the field of soil remediation, can solve the problems of secondary pollution and low treatment efficiency, etc.

Inactive Publication Date: 2017-05-10
ZHENGZHOU YUANRAN BIOLOGY TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

These physical or chemical methods have their own advantages, but generally there are problems such as low treatment efficiency and easy to cause secondary pollution.

Method used

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  • Nickel-contaminated soil repairing agent and preparation method thereof
  • Nickel-contaminated soil repairing agent and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] In the embodiment of the present invention, a nickel-contaminated soil remediation agent, based on parts by mass, is composed of the following raw materials: 23 parts of sepiolite, 8 parts of Schistophylli, 8 parts of naked dry sandweed, and modified rose glow 4 parts of the modified rhonite; the preparation steps of the modified rhonite are: ultrafinely pulverize the rhonite to 5μm to obtain the rhonite powder; mix the rhonite powder with 1.8 times the mass of N-maleylated chitosan , Dispersed in a 92% ethanol solution with a volume concentration of 2 times the sum of its mass to obtain a suspension slurry; continue to treat the suspension slurry with an ultrasonic wave with a power of 200W and a frequency of 32kHz for 45 minutes, and concentrate under reduced pressure to remove the ethanol, 105°C After drying at temperature for 3 hours, modified rhodonite is obtained.

[0024] The preparation method of the nickel contaminated soil remediation agent includes the following...

Embodiment 2

[0031] In the embodiment of the present invention, a nickel-contaminated soil remediation agent, in terms of parts by mass, is composed of the following raw materials: 28 parts of sepiolite, 5 parts of Schistophyllum spp, 5 parts of naked dry sandweed, and modified rosegloss 7 parts of modified rhonite; the preparation steps of modified rhonite are: ultrafinely pulverize rhonite to 10 μm to obtain rhonite powder; mix rhonite powder with 2.3 times the mass of N-maleylated chitosan , Dispersed in a 95% ethanol solution with a volume concentration of 3 times the sum of its mass to obtain a suspension slurry; continue to treat the suspension slurry with ultrasonic waves with a power of 220W and a frequency of 34kHz for 40 minutes, and concentrate under reduced pressure to remove the ethanol, 110°C Dry for 2h at temperature to obtain modified rhodonite.

[0032] The preparation method of the nickel contaminated soil remediation agent includes the following steps:

[0033] (1) Crush the...

Embodiment 3

[0039] In the embodiment of the present invention, a nickel-contaminated soil remediation agent, calculated in parts by mass, is composed of the following raw materials: 24 parts of sepiolite, 7 parts of Schizospora kernii, 7 parts of naked dry sandweed, and modified rose glow 5 parts of modified rhonite; the preparation steps of modified rhonite are: ultrafinely pulverize rhonite to 5μm to obtain rhonite powder; mix rhonite powder with 2.3 times the mass of N-maleylated chitosan , Dispersed in a 95% ethanol solution with a volume concentration of 2 times the sum of its mass to obtain a suspension slurry; continue to treat the suspension slurry with ultrasonic waves with a power of 200W and a frequency of 34kHz for 40 minutes, and concentrate under reduced pressure to remove the ethanol, 110°C Dry for 2h at temperature to obtain modified rhodonite.

[0040] The preparation method of the nickel contaminated soil remediation agent includes the following steps:

[0041] (1) Crush the...

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Abstract

The invention discloses a nickel-contaminated soil repairing agent and a preparation method thereof. The repairing agent is prepared from, by mass, 23-28 parts of sepiolite, 5-8 parts of Korthof stichococcus bacillaris, 5-8 parts of Hypnea chordacea and 4-7 parts of modified rhodonite, wherein the use ratio of Korthof stichococcus bacillaris to Hypnea chordacea is 1:1. The preparation of the modified rhodonite comprises the steps of superfine grinding, mixing with N-maleoyl chitosan, dispersing, ultrasonication and drying. Korthof stichococcus bacillaris is ground and sieved to obtain Korthof stichococcus bacillaris powder, and Hypnea chordacea is ground and sieved to obtain Hypnea chordacea powder; sepiolite is calcined, soaked by the addition of a dextrotartaric acid aqueous solution, taken out for refrigeration, and then mixed with the Korthof stichococcus bacillaris powder, the Hypnea chordacea powder and the modified rhodonite, and thermal ultrasonication and drying are sequentially conducted to obtain the repairing agent. When sepiolite, Korthof stichococcus bacillaris, Hypnea chordacea and the modified rhodonite are compounded, the content of leaching nickel in the soil can be obviously reduced, and meanwhile, no secondary pollution can be caused to the repaired soil.

Description

Technical field [0001] The invention relates to the technical field of soil remediation, in particular to a nickel-contaminated soil remediation agent and a preparation method thereof. Background technique [0002] Soil is a natural environmental element for human survival and an important resource for agricultural production. It is at the center of the natural environment and carries approximately 90% of the pollutants in the environment from various aspects. At present, the world emits about 15,000 tons of mercury, 15 million tons of manganese, 3.4 million tons of copper, 5 million tons of lead, and 1 million tons of nickel each year. This results in heavy metal pollution in farmland soils in various countries around the world. [0003] Nickel is a component of urease in plants and is closely related to nitrogen metabolism. It can promote seed germination, plant growth and development, increase production, and is related to plant toxicity and enhance plant disease resistance. A...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09K17/40B09C1/08
CPCC09K17/40B09C1/08
Inventor 不公告发明人
Owner ZHENGZHOU YUANRAN BIOLOGY TECH CO LTD
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