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Electrode device and method for lowering arsenic and lead concentrations in rice

An electrode device and a technology of lead concentration, applied in the field of reducing the concentration of arsenic and lead in rice, can solve the problems of increasing cadmium, and achieve the effect of controlling transfer and reducing accumulation

Inactive Publication Date: 2015-05-27
RES CENT FOR ECO ENVIRONMENTAL SCI THE CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

At present, the main limitation is that water management requires training for farmers; in addition, for soils contaminated with arsenic and cadmium, reducing flooding time can reduce arsenic in grains, but significantly increase cadmium in grains

Method used

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  • Electrode device and method for lowering arsenic and lead concentrations in rice
  • Electrode device and method for lowering arsenic and lead concentrations in rice

Examples

Experimental program
Comparison scheme
Effect test

Embodiment

[0032] The paddy soil is Jiaxing paddy soil with arsenic added to 120ppm, and the rice variety is Xiushui 128. The soil was placed in a plastic pot with a diameter of 9 cm and a depth of 15 cm. After flooding for 11 days, the rice seedlings were moved into them. After 7 days of growth, samples were taken to analyze the concentrations of heavy metals arsenic, copper, cadmium, and lead in the roots and leaves.

[0033] The anode electrode area is divided into three gradients: 15, 21 and 27cm 2 . The electrode thickness is: 0.5cm, the electrode burial depth is 6cm: the external resistance is 500 ohms. Three replicates per gradient.

[0034] In the system with or without electrodes, the content of heavy metals in rice is shown in the table below:

[0035]

[0036] The results show that after adding electrodes, the arsenic in rice roots dropped from 4544mg / kg to 3820mg / kg, and the arsenic in rice leaves dropped from 271mg / kg to 112mg / kg; lead dropped from 30.2mg / kg in roots t...

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Abstract

The invention discloses an electrode device for lowering arsenic and lead concentrations in rice. The electrode device comprises an anode and a cathode, wherein an anode electrode is connected with a cathode electrode by a lead which is connected with a resistor in series; and the anode and the cathode are made of inert conductive materials. The invention further discloses a method for lowering arsenic and lead concentrations in rice by employing the electrode device. The accumulation of arsenic and lead in tissues of the rice can be significantly lowered; and transfer of lead and arsenic in paddy soil towards a plant body is effectively controlled.

Description

technical field [0001] The invention relates to an electrode device for reducing the concentration of arsenic and lead in rice. [0002] The present invention also relates to a method for reducing the concentration of arsenic and lead in rice by using the above-mentioned electrode device. Background technique [0003] The problem of heavy metals in agricultural soil has seriously threatened the food safety of our country. Due to its unique growth environment and its own characteristics, rice has become a crop that is prone to enrich the heavy metal arsenic. In 2010, a spot check of rice in the Hunan market showed that the arsenic content in 47 of the 112 spot check samples was higher than the national standard (Lei Ming et al., 2009). A simple and effective method to control the arsenic content in rice is an urgent requirement to ensure the health of people whose staple food is rice. [0004] The control of arsenic pollution in agricultural soil can be roughly divided int...

Claims

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Application Information

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IPC IPC(8): B09C1/00B09C1/08
Inventor 朱永官陈正孙国新王亚洁刘攀攀
Owner RES CENT FOR ECO ENVIRONMENTAL SCI THE CHINESE ACAD OF SCI
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