Method for restoring heavy metal polluted soil with energy crop castor

A technology that pollutes soil and heavy metals, applied in the restoration of polluted soil, etc., can solve the problems of limited accumulation of heavy metals, short plants, slow growth, etc., and achieve the effect of small amount of engineering, low cost, and reduced soil erosion

Inactive Publication Date: 2015-07-22
SHANGHAI UNIV
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  • Claims
  • Application Information

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Problems solved by technology

Although some hyperaccumulator plants can simultaneously have a strong ability to accumulate multiple heavy metals, due to the shortcomings of hyperaccumulator plants such as short plants and slow growth, coupled with the limitations of climate and soil environment, the heavy metal accumulation of these hyperaccumulator plants Accumulation is limited and thus limited in its application

Method used

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  • Method for restoring heavy metal polluted soil with energy crop castor
  • Method for restoring heavy metal polluted soil with energy crop castor
  • Method for restoring heavy metal polluted soil with energy crop castor

Examples

Experimental program
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Effect test

Embodiment 1

[0020] The method for utilizing castor oil to repair heavy metal cadmium contaminated soil of the present embodiment comprises the following steps:

[0021] 1. Investigation of the concentration of cadmium in soil pollutants

[0022] The entire experimental area was divided into quadrats with a length and width of 3 m. A ridge with a width of 1 m was left between each plot. Set up 5 sampling points for each sample according to the principle of diagonal. Each sampling point collects an appropriate amount of 0-20 cm soil and mixes it as the test soil for the numbered sample. Put it into a ziplock bag and bring it back to the laboratory for processing . The soil samples to be tested were air-dried naturally and passed through a 2 mm nylon sieve for later use. Soil samples were air-dried, ground and treated with HNO 3 -HClO 4 Digest. The concentration of cadmium was determined by ICP-AES (ICP, LEEMAN Company, the United States) and AAS (ZEEnit600, Analytik Jena AG, Germany)....

Embodiment 2

[0044] Utilize castor oil of the present embodiment to restore heavy metal zinc polluted soil method to comprise the steps:

[0045] 1. Investigation on the Concentration of Zinc in Soil Pollutants

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Abstract

The invention relates to a method for restoring heavy metal polluted soil with an energy crop castor and belongs to the technical field of ecological restoring of a polluted environment. According to the method, the castor is planted in the heavy metal polluted soil, can grow normally and does not represent any toxicity phenomena; the heavy metal concentration of an above-ground part is higher than that of a root; and the castor represents extremely high transfer ability. According to the method, the plant is used for restoring the heavy metal polluted soil, heavy metal pollutants such as Cd, Ni, Cu, Mn, Zn and Pb in the soil can be removed via a plant extraction process, and the method has a certain economic value at the same time.

Description

technical field [0001] The invention relates to an ecological restoration technology for polluted environment, in particular to a method for repairing heavy metal polluted soil by using castor oil, an energy crop. Background technique [0002] Soil heavy metal pollution is a global thorny problem, because this pollution is an irreversible process. Pollutants stay in the soil for a long time and cannot be degraded by plants or microorganisms. After excessive accumulation of heavy metals in the edible parts of crops, they are easily transmitted to humans or animals through the food chain, which poses serious hazards to human health and also affects land. Use function. At present, the remediation technologies of soil heavy metals mainly include physical and chemical methods and phytoremediation methods. The former mainly includes chemical fixation, soil rinsing, electrodynamic restoration, etc.; the latter mainly includes three kinds of plant fixation (Phytostabilization), pl...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B09C1/00
Inventor 何池全马灏吴美英徐月清张文静
Owner SHANGHAI UNIV
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