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Method for restoring and controlling Cd (cadmium) and DEHP (di-(2-ethylhexyl)phthalate) compound polluted soil by using large-biomass non-hyperaccumulation vegetables

A compound pollution and super-enrichment technology, applied in the field of phytoremediation, can solve the problems of less environmental effects of compound pollution, and achieve the effects of low technical requirements, rapid growth and low investment.

Inactive Publication Date: 2013-03-27
CHANGZHOU UNIV +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

At present, in the research of soil heavy metal and organic pollution chemistry and phytoremediation of heavy metal and organic pollution, there have been many reports on the absorption of heavy metals and organic elements by plants under the condition of single element pollution, but the coexistence of heavy metals and organic substances in the same environment has been reported. There are few studies on the environmental effects of the combined pollution [Document 11: Peng Li, Huang Liang, Li Chengbei, etc. Effects of purple soil zinc and cadmium combined pollution on lettuce under the action of simulated acid rain[J]. Journal of Soil and Water Conservation, 2006 ,20(3):28-31]

Method used

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  • Method for restoring and controlling Cd (cadmium) and DEHP (di-(2-ethylhexyl)phthalate) compound polluted soil by using large-biomass non-hyperaccumulation vegetables
  • Method for restoring and controlling Cd (cadmium) and DEHP (di-(2-ethylhexyl)phthalate) compound polluted soil by using large-biomass non-hyperaccumulation vegetables
  • Method for restoring and controlling Cd (cadmium) and DEHP (di-(2-ethylhexyl)phthalate) compound polluted soil by using large-biomass non-hyperaccumulation vegetables

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] Example 1: Confirmation and simulation application of potted gradient Cd, DEHP large biomass non-hyperaccumulator vegetable crops

[0021] The pot test site is in the net room of the Rice Research Institute in Wujin District, Changzhou City. The site is in a farm in Wujin District. There are no pollution sources around the experimental site, and it is an area that is not polluted by heavy metals and organic matter. The potting test soil was collected from the surface soil (0-20 cm) in the pollution-free area of ​​the Rice Research Institute in Wujin District, Changzhou City.

[0022] A total of 8 treatments were set up in this experiment, and each treatment was repeated 3 times. The added Cd concentrations (mg / kg) were: 0 (control, not added), 12, 24, 36, 48, 72, 96 and 150, and the added DEHP concentrations (mg / kg) were: 0 (control, not added), 15, 30, 45, 60, 90, 120 and 180. The Cd added in the experiment was analytically pure CdCl 2 25H 2 O, DEHP is analytically...

Embodiment 2

[0033] Example 2: Confirmation of field plots and remediation of Cd, DEHP compound polluted soil

[0034] The experimental site is located in the Rice Research Institute of Wujin District, Changzhou City. The research institute is located in the middle and lower reaches of the Yangtze River, 32km away from Changzhou City. It has a northern subtropical oceanic climate and a mild climate all year round. There are 3 plots in the experiment, the Cd concentration (mg / kg) is 0, 10, 50, and the DEHP concentration (mg / kg) is 0, 20, 60, respectively. The Cd and DEHP in each plot have been added for one year above; the area of ​​the experimental plot is 4m 2 (L=2m, W=2m), the basic physical and chemical properties of the soil are the same as the potting soil. Select 2-3 pakchoi seedlings with true leaves unfolded and consistent growth and move them into the plots, plant 8 rows in each plot, 10 trees in each row, 80 trees in total. The open-air cultivation method is adopted, and accord...

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Abstract

The invention relates to a plant restoring technology of environment pollution, and in particular relates to a method for restoring and controlling Cd (cadmium) and DEHP (di-(2-ethylhexyl)phthalate) compound polluted soil by using large-biomass non-hyperaccumulation vegetables including pakchoi, capsicum and lettuce. According to the invention, the large-biomass non-hyperaccumulation vegetables including pakchoi, capsicum and lettuce are used to absorb and accumulate Cd and DEHP in the compound polluted soil, and transfer the Cd and DEHP to above the ground; when the vegetables grow to the mature stage, the vegetables are wholly removed and used as daily edible vegetables, thus achieving the aim of ensuring vegetable varieties while controlling the polluted soil; and through growing the vegetables in pakchoi-capsicum-lettuce crop rotation and repeating the processes, the Cd and DEHP in the polluted soil can be continuously extracted until the contents thereof achieve the environmental safety standards. The method has the advantages that the work amount is small, the physicochemical properties of the soil are not destroyed, no secondary pollution is generated, the vegetable varieties can be ensured while the compound polluted soil is controlled, and the like.

Description

technical field [0001] The invention relates to a phytoremediation technology for polluted environment, in particular to a method for remediating Cd and DEHP compound polluted soil by using large biomass non-hyperaccumulator vegetables. Background technique [0002] Soil is the material basis for humans to obtain food and other renewable resources [Document 1: Liu Xiumei, Nie Junhua, Wang Renqing. Research progress in phytoremediation of heavy metal-contaminated soils [J]. Journal of Gansu Agricultural University, 2001], is the natural basis for human survival Important resource for the environment and agricultural production. With the development of the world economy and the increase of population, the discharge of environmental pollutants is increasing day by day. Environmental pollution and ecological damage have brought serious pollution to the soil. Among them, the area of ​​soil polluted by heavy metals and organic matter is increasing, which not only degrades soil fer...

Claims

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Application Information

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IPC IPC(8): B09C1/00
Inventor 杨彦赵洁李定龙王宗庆
Owner CHANGZHOU UNIV