Method for remedying Zn-Cd compound contaminated soil through cooperation of biomass charcoal and plant intercropping

A technology of biomass charcoal and compound pollution, applied in the restoration of polluted soil, etc., can solve the problems of inability to guarantee the economic interests of farmers, long restoration period, etc., and achieve the effect of improving food safety, good pore structure, and good physical and chemical properties.

Inactive Publication Date: 2018-06-19
ZHEJIANG FORESTRY UNIVERSITY
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  • Abstract
  • Description
  • Claims
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Problems solved by technology

[0006] The present invention aims at the disadvantages in the prior art that the single use of super-accumulative plants has a long repair period, the economic interests of farmers cannot be guaranteed, and is considered only suitable for repairing lightly polluted farmland soil, and provides a synergistic plant utilizing biomass charcoal. The method of intercropping to remediate zinc-cadmium compound polluted soil, combined with the current situation of rural economic development in my country and the actual situation of insufficient restoration funds, proposes a remediation model for zinc-cadmium compound polluted soil by using biochar in conjunction with corn and Sedum sedum. A remediation model of "production while remediation" is feasible for zinc-cadmium compound contaminated soil, which provides a theoretical basis for the remediation engineering practice of heavy metal-contaminated soil in my country

Method used

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  • Method for remedying Zn-Cd compound contaminated soil through cooperation of biomass charcoal and plant intercropping
  • Method for remedying Zn-Cd compound contaminated soil through cooperation of biomass charcoal and plant intercropping
  • Method for remedying Zn-Cd compound contaminated soil through cooperation of biomass charcoal and plant intercropping

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Effect test

Embodiment 1

[0036] The preparation process of goat manure-based biochar is as follows: goat manure is removed from impurities, air-dried naturally, ground to a particle size of less than 20 mesh, pyrolyzed in a pyrolysis furnace at 500°C for 1 hour under nitrogen-filled conditions, and cooled to room temperature Go through an 80-mesh nylon sieve to obtain sheep manure-based biochar, and its basic physical and chemical properties are shown in Table 2.

[0037] Table 2 Basic physical and chemical properties of sheep manure-based biochar

[0038]

[0039] Such as figure 1 As shown, it can be clearly seen by an electron microscope that the group structure between the sheep manure-based biochar particles prepared by the present invention presents an irregular flocculent and not smooth state, and the spacing is tight, and there are protrusions on the surface, and the specific surface area Large, good pore structure, loose structure.

[0040] The surface functional groups of sheep feces-bas...

Embodiment 2

[0052] With embodiment 1, difference is that the addition of sheep manure base biochar is the 2% (dw / dw) of zinc cadmium composite pollution soil quality among the embodiment 2, i.e. 80g.

Embodiment 3

[0054] With embodiment 1, difference is that the addition of sheep manure base biochar is the 5% (dw / dw) of zinc cadmium composite pollution soil quality among the embodiment 3, i.e. 200g.

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Abstract

The invention relates to the technical field of phytoremediation of heavy metal compound contaminated soil and discloses a method for remedying Zn-Cd compound contaminated soil through cooperation ofbiomass charcoal and plant intercropping. The method comprises the following steps of adding the biomass charcoal in the Zn-Cd compound contaminated soil to obtain a base material; and intercropping sedum plumbizincicola and corn in the base material, specifically, the application amount of the biomass charcoal is 1%-5% of the quality of the Zn-Cd compound contaminated soil, and the biomass charcoal is a sheep manure based biomass charcoal. The mode of remedying the Zn-Cd compound contaminated soil through cooperation of the biomass charcoal and intercropping of sedum plumbizincicola and cornis a feasible remediation mode, the Zn2+ and Cd2+ contents in the Zn-Cd compound contaminated soil can be steadily reduced, crop yield can be improved to a certain extent, the condition that farmers have economic benefits to a certain extent is ensured, and the actual need that production and remediation are conducted simultaneously is met.

Description

technical field [0001] The invention relates to the technical field of phytoremediation of heavy metal compound polluted soil, in particular to a method for using biomass charcoal to cooperate with plant intercropping to restore zinc and cadmium compound polluted soil. Background technique [0002] At present, soil heavy metal pollution has become a global environmental problem. Heavy metal pollution in soil has the characteristics of long residence time and cannot be removed through degradation. The harm to the environment and human beings is long-term, cumulative and irreversible, and the difficulty of treatment is also extraordinary. Our country has a lot of people and little land, and land is the most basic means of production for many farmers to survive. Therefore, farmers will continue to work even if the land is polluted when there is no other source of income. Therefore, the research and development of soil heavy metal remediation technology with practical value ha...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B09C1/00B09C1/08
CPCB09C1/00B09C1/08B09C1/105
Inventor 武帅吴胜春梁鹏张进曹玉成
Owner ZHEJIANG FORESTRY UNIVERSITY
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