Method for promoting ricinus communis to repair cadmium-zinc combined polluted soil

A compound pollution and castor oil technology, applied in the field of phytoremediation, can solve the problems of environmental pollution, resource waste, and affecting the appearance of the environment, and achieve the effects of low input cost, increasing soil organic matter, and improving soil fertility

Active Publication Date: 2016-12-07
SHANGHAI UNIV
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Problems solved by technology

This not only affects the beauty of the environment, but also causes a waste of resources, and also creates environmental pollution problems.

Method used

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  • Method for promoting ricinus communis to repair cadmium-zinc combined polluted soil
  • Method for promoting ricinus communis to repair cadmium-zinc combined polluted soil
  • Method for promoting ricinus communis to repair cadmium-zinc combined polluted soil

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Embodiment Construction

[0014] The specific implementation manners of the present invention will be described in further detail below in conjunction with the tables and drawings.

[0015] A method for castor to repair soil contaminated by cadmium and zinc compound, the specific steps are: first, select a piece of lawn as an annual castor planting area in the public green space of Pudong New District, Shanghai, remove weeds, and plow, The area is divided into quadrats with a length of 20m and a width of 10m. The castor is sown according to the density of 1.5×1.0 m. After 7 days of sowing, the castor is thinned, and the tall or short seedlings are removed, and the plant height is retained. , thickness equal seedlings, watering; Then, when castor-oil plant grows 90 days, add 200g bacterium slag at the root of every strain, watering makes it moisten, other is cultivated by conventional method; Then, grow to 120 days castor-oil Harvest the hemp as it matures.

[0016] Among them: the public green space i...

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Abstract

The invention discloses a method for promoting ricinus communis to repair cadmium-zinc combined polluted soil. The method is characterized in that firstly, according to the method, seeding of annual ricinus communis is conducted on the heavy metal cadmium-zinc combined polluted soil according to the density of 1.5 m*1.0 m; then when the ricinus communis grows for 90 days, 200 g of mushroom dreg (200 g/plant) is added to the root part of each plant of ricinus communis, and cultivation is conducted according to a conventional method; and afterwards, the ricinus communis is harvested after the ricinus communis grows for 120 days and are mature, and concentrated high-concentration heavy metal in the ricinus communis can be removed, wherein according to the heavy metal pollution indexes of the cadmium-zinc combined polluted soil, the content of Zn is 141 mg/kg-1618 mg/kg, and the content of Cd is 0.50 mg/kg to 2.37 mg/kg. According to the method, the mushroom dreg can be added to increase soil organic matter and improve soil fertility, and the repairing efficiency of the ricinus communis for the cadmium-zinc combined polluted soil can be promoted.

Description

technical field [0001] The invention relates to a phytoremediation technology for polluted soil, in particular to a method for promoting castor to remediate cadmium-zinc composite polluted soil. Background technique [0002] In recent years, with the acceleration of industrialization, unreasonable mining of mineral resources and smelting discharge, sewage irrigation, atmospheric deposition, and application of chemical fertilizers and pesticides have caused soil pollution problems. China's soil environment problems are even more prominent. Statistics show that the national soil pollution rate exceeds the standard by 16.1%. The situation is worrying and it has caused huge losses. Pollutants in soil mainly include heavy metals and organic matter, among which heavy metal pollution is particularly serious. Cadmium (Cd) is the priority pollutant among the heavy metal pollutants in farmland soil in my country. It is widely distributed in 25 regions in 11 provinces in China, with a...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B09C1/00
CPCB09C1/00
Inventor 何池全石正驰张文静熊鹏鹏程雪张琦炎龙孟苓国旋琳
Owner SHANGHAI UNIV
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