Method for remediating cadmium-contaminated soil with compositae plants

A technology of cadmium-contaminated soil and Compositae plants, applied in the field of repairing cadmium-contaminated soils with Compositae plants, can solve the problems that it is difficult to find widely applicable plants, consume a lot of manpower, material and financial resources, and the economic effect is not significant, and achieve high ornamental value and economic value, low cost, and the effect of avoiding danger

Inactive Publication Date: 2018-11-16
HUNAN XISI ECOLOGY TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the screening of plant materials is the most critical and difficult part of phytoremediation technology. On the one hand, due to factors such as climate, humidity, and soil properties in heavy metal-polluted areas, the adaptability and survival of plant species in specific areas are limited, making it difficult to find Widely applicable plants; second, the management of plant growth regulation during t

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0033] A method for repairing cadmium-contaminated soil (cadmium concentration is 10mg / kg) by using Compositae plants, selecting marigolds as repairing plants, selecting mature seeds from mature marigold plants in early March, keeping the temperature at 25°C, and covering the seeds with soil The thickness is 0.6cm, and the marigold seedlings are cultivated under the premise of moist soil. The heavy metal-contaminated land was dug 40cm deep, and heavy metal-activated bacteria were inoculated into the excavated soil. The heavy-metal-activated bacteria were mixed with Bacillus and Pseudomonas at a ratio of 1.5:1, and the concentration of heavy-metal-activated bacteria was 1×108 Bacteria / ml, inoculate 80ml of heavy metal-activated bacteria solution per kilogram of heavy metal-contaminated soil, and complete the inoculation in two times. After the inoculation was completed, the soil was backfilled with film, and after standing for 10 days, earthworm seedlings were placed in the hea...

Embodiment 2

[0035]A method of using Compositae plants to repair cadmium-contaminated soil (cadmium concentration is 30mg / kg), select zinnias as repair plants, select mature seeds from mature zinnia plants in early March, keep the temperature at 25°C, The thickness of the seed covering soil is 0.6cm, and the zinnia seedlings are cultivated under the premise of moist soil. The heavy metal-contaminated land was dug 40 cm deep, and heavy metal-activated bacteria were inoculated into the excavated soil. The heavy-metal-activated bacteria were mixed with Bacillus and Pseudomonas at a ratio of 1.5:1, and the concentration of heavy-metal-activated bacteria was 1×108 Bacteria / ml, inoculate 80ml of heavy metal-activated bacteria solution per kilogram of heavy metal-contaminated soil, and complete the inoculation in two times. After the inoculation was completed, the soil was backfilled with film, and after standing for 10 days, earthworm seedlings were placed in the heavy metal-contaminated soil, a...

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PUM

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Abstract

The invention discloses a method for remediating cadmium-contaminated soil with compositae plants, wherein the method comprises the following steps: A, cultivation: sowing and cultivating compositae plants under general soil conditions from late March to early April; B, planting: when compositae plant seedlings are as high as 10-13 cm, selecting cadmium-contaminated soil, preparing the soil, fixedly planting the compositae plant seedlings, and keeping the plant spacing between 30 and 35 cm; C, management: generally without watering and fertilization, spraying a urea solution mixed with potassium dihydrogen phosphate onto leaf surfaces for 1-3 times in the budding period, the flowering period and other growth peak seasons; D, harvesting: harvesting in the flowering period in August to September, wherein the plants after harvesting include ground parts and underground parts; E, repetition: repeating the step B and the step C, and harvesting again in February to March next year; and F, subsequent treatment: repeating the steps until the content of heavy metal cadmium in the selected soil meets environmental safety standards. The compositae plants have short growth cycle, strong adaptability and good ornamental value, and the method can be implemented in most areas.

Description

technical field [0001] The invention relates to the field of soil remediation, in particular to a method for remediating cadmium-contaminated soil by using compositae plants. Background technique [0002] The waste water, waste residue, and tailings formed during the mining and smelting of non-ferrous metal mineral resources not only occupy and affect the land in the mining area, but also cause ecological damage and soil pollution in the surrounding towns of the mining area due to the heavy metal elements transferred through the discharge of industrial waste. In the process of industrial production and the discharge and retention of industrial waste, taking industrial wastewater discharge as an example, the heavy metal elements in the wastewater transfer and accumulate to the coastal soil, which has greatly changed the soil environment. Changes in the proportion of elements in the soil, soil physical properties and chemical properties lead to a decline in soil quality, and t...

Claims

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Application Information

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IPC IPC(8): B09C1/10
CPCB09C1/105B09C2101/00
Inventor 张卫刘加力王勇坚周朝新
Owner HUNAN XISI ECOLOGY TECH
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