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Heavy metal polluted farmland soil conditioning method based on eggshell resource utilization

A soil conditioning and heavy metal technology, which is applied in the field of soil conditioning of heavy metal polluted farmland, can solve the problems of reducing heavy metal absorption, increasing crop biomass, etc., and achieve the effects of increasing calcium content, promoting crop growth, and reducing environmental pollution

Inactive Publication Date: 2018-06-15
SOUTH CHINA UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, in the current research on eggshells at home and abroad, few people have used the adsorption properties of eggshells to conduct systematic and in-depth research on it as a soil conditioner; therefore, using waste eggshells to develop a feasible heavy metal soil conditioning treatment method , so as to reduce the absorption of heavy metals by the crops planted and increase the biomass of crops, it has practical significance and practical value

Method used

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  • Heavy metal polluted farmland soil conditioning method based on eggshell resource utilization
  • Heavy metal polluted farmland soil conditioning method based on eggshell resource utilization
  • Heavy metal polluted farmland soil conditioning method based on eggshell resource utilization

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Embodiment

[0030] Washing, drying, cooling, crushing and sieving discarded eggshells to obtain eggshell powder. Select eggshell powder with a particle size of 100 mesh, and then uniformly mix the eggshell with heavy metal-contaminated acidic farmland soil, so that the percentages of eggshell dosage relative to the soil mass are 0.1%, 0.25%, 0.5%, and 1%, respectively, and Plant water spinach and cultivate it at room temperature for 35 days. Among them, the heavy metal polluted acidic farmland soil was collected from the polluted soil in Shangba Village, Dabaoshan Mining Area, Shaoguan City, Guangdong Province. The soil texture is loamy soil, the soil pH is 4.79, the organic matter content is 29.47g / kg, the copper content is 279.985mg / kg, and the zinc content is 358.556mg. / kg, cadmium content is 1.141mg / kg, arsenic content is 134.907mg / kg, chromium content is 53.574mg / kg, lead content is 300.336mg / kg, nickel content is 30.566mg / kg, mercury content is 0.170mg / kg .

[0031] 1. Investigat...

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Abstract

The invention belongs to the technical field of soil pollution control and restoration and discloses a heavy metal polluted farmland soil conditioning method based on eggshell resource utilization. According to the heavy metal polluted farmland soil conditioning method based on eggshell resource utilization, waste eggshells are washed, dried, cooled, smashed and screened, eggshell powder is manufactured, then the eggshells and heavy metal polluted acidic farmland soil are evenly mixed, and crops are planted. By the adoption of the heavy metal polluted farmland soil conditioning method based oneggshell resource utilization, the eggshells are added to the farmland soil, the eggshells can adsorb heavy metals in the soil and react with acids in the soil to improve the pH, the heavy metal absorption amount of the crops is reduced, the crop biomass is increased, the soil is completely conditioned beneficially, and therefore the quality and yield of the crops are improved.

Description

technical field [0001] The invention belongs to the technical field of soil pollution control and restoration, and in particular relates to a heavy metal-polluted farmland soil conditioning method based on resource utilization of eggshells. Background technique [0002] Soil pollution is the product of long-term industrialization. The "three wastes" (waste water, waste gas, and waste residue) generated by industrial and agricultural activities enter the soil through water bodies and the atmosphere. When they accumulate to a certain extent and exceed the self-purification capacity of the soil, the ecological function of the soil will be reduced. [0003] Common heavy metal-contaminated soil remediation measures include chemical passivation, soil leaching, and biological remediation. Among them, chemical passivation is widely used because of its low cost, remarkable effect, and short repair period. Chemical substances can reduce the absorption and accumulation of heavy metals...

Claims

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Application Information

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IPC IPC(8): B09C1/08A01B77/00
CPCA01B77/00B09C1/08
Inventor 卢桂宁骆蔚萋季晏平李华锋党志易筱筠
Owner SOUTH CHINA UNIV OF TECH
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