Unlock instant, AI-driven research and patent intelligence for your innovation.

Method for repairing soil thallium contamination with cabbage assisted by exogenous calcium

A technology for remediating soil and cabbage, applied in the direction of restoration of polluted soil, etc., can solve problems such as groundwater resource pollution, Tl environmental pollution, retention, etc.

Inactive Publication Date: 2017-08-08
GUIZHOU INST OF TECH
View PDF3 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Studies have found that although chemical chelating agents (such as EDTA, etc.) can increase the enrichment concentration of heavy metals in plants, their own toxicity will force the plant biomass to decrease significantly, and cannot effectively improve the efficiency of phytoremediation.
At the same time, chemical chelating agents stay in the soil for a long time because they are difficult to degrade naturally, and there is a potential risk of groundwater resources being polluted
Third, the cost of chemical chelating agents is high and it is difficult to popularize and apply
Tl is scattered in nature, and its abundance in the earth's crust is only 0.75 mg / kg, but its content in sulfides is high (up to thousands of mg / kg); therefore, in thallium-containing sulfide mineralization areas , the primary geochemical anomaly and supergene geochemical enrichment of Tl often appear, and the development and utilization of sulfide mineral resources will lead to the increasingly serious environmental pollution of Tl in this region, which will easily cause the ecological and human health hazards of Tl
Compared with lead, zinc, cadmium, mercury, and arsenic, there are few remediation methods for soil thallium pollution

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Method for repairing soil thallium contamination with cabbage assisted by exogenous calcium
  • Method for repairing soil thallium contamination with cabbage assisted by exogenous calcium
  • Method for repairing soil thallium contamination with cabbage assisted by exogenous calcium

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0056] 1) Sow "Jingfeng No. 1" cabbage seeds into a nutrient bowl, and then place the nutrient bowl in an environment where the temperature is 26°C for 14 hours during the day, 20°C for 8 hours at night, and the relative humidity is 80% for germination ;

[0057] 2) After the seeds germinate and grow 4 to 5 true leaves, select strong seedlings and plant them in the soil polluted by thallium;

[0058] 3) One week after planting, spray Ca(NO 3 ) 2 Solution 1 time, at least 4 to 6 times of continuous spraying, each spraying dose is 0.5g calcium / kg soil;

[0059] 4) After the cabbage grows, it is harvested and processed intensively.

Embodiment 2

[0061] Each step is with embodiment 1; Wherein, step 3) in Ca(NO 3 ) 2 The number of sprays of the solution was 4 times.

Embodiment 3

[0063] The steps are the same as in Example 1; wherein, before sowing, first soak the seeds in warm water at 20-30°C for 2 hours, then remove and filter to dry.

[0064] From Figure 4 It can be seen that the amount of Tl extracted from cabbage treated with 2, 2.5 and 3g / kg Ca was significantly higher than that treated with 0 and 1g / kg Ca. Under 12mg / kg Tl treatment, the highest Tl extraction amount of different Ca concentration treatment is 3.2 times of the lowest Tl extraction amount, which is 3.1 times of blank Ca treatment; under 8mg / kg Tl treatment, the highest Tl extraction amount of different Ca concentration treatment is 2.6 times of the lowest Tl extraction amount, the lowest Tl amount was extracted from cabbage treated with blank Ca. Therefore, considering the economic cost, the optimum amount of exogenous calcium is 2g calcium / kg soil.

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

No PUM Login to View More

Abstract

The invention discloses a method for repairing soil thallium contamination with cabbage assisted by exogenous calcium, belongs to methods for repairing heavy-metal-contaminated soil and aims to provide the method for repairing soil thallium contamination, wherein the method is large in biomass, good in enrichment effect, low in cost and free of secondary pollution. According to the method, cabbage seeds are sowed in a nutrition bowl, and then the nutrition bowl is placed in the environment where the temperature at 14 o'clock in the daytime is 26 DEG C, the temperature at eight o'clock at night is 20 DEG C, and the relative humidity is 80% for accelerating germination; after the seeds sprout and four to five true leaves are grown, strong seedlings are selected to be planted in the thallium-contaminated soil; after one week of planting, a Ca(NO3)2 solution is sprayed once every week, spraying is performed at least four times continuously, and the spraying dosage is 0.5 g / kg each time; and after the cabbage is grown up, the cabbage is harvested and processed in a concentrated manner. The method is used for repairing soil thallium contamination.

Description

technical field [0001] The invention relates to a method for repairing soil polluted by heavy metals, in particular to a method for repairing soil polluted by thallium. Background technique [0002] Phytoremediation of heavy metal-contaminated soil has the advantages of low cost, wide application range, high environmental aesthetic value, and strong selectivity, and has become the most advanced and main method for treating heavy metal-contaminated soil. At present, although some hyperaccumulator plants have been found, they generally have defects such as small biomass and slow growth, so the required remediation period is long, and it is difficult to be used for large-scale remediation of heavy metal-contaminated soil. [0003] In order to improve the availability of heavy metals in soil and improve the efficiency of phytoremediation, "Chelate-induced phytoremediation" has been proposed in recent years. That is to take some measures to induce heavy metals in plants with lar...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Applications(China)
IPC IPC(8): B09C1/00B09C1/08
CPCB09C1/08B09C1/105B09C2101/00
Inventor 贾彦龙孙嘉龙肖唐付宁增平杨菲姜涛刘意章马连刚路坊海
Owner GUIZHOU INST OF TECH