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Comprehensive technique for reducing pollutions to amaranths by heavy metals of cadmium and lead in soil

A heavy metal and amaranth technology is applied in the field of lead-contaminated amaranth and the reduction of soil heavy metal cadmium, which can solve the problems of no screening of soil conditioners, no soil conditioners, etc., and achieves low cost, short time required, and strong pertinence. Effect

Inactive Publication Date: 2011-09-21
SUN YAT SEN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, due to the specificity of crop varieties, what kind of agricultural materials and microorganisms to use, as well as the amount and combination of agricultural materials, to effectively reduce the pollution of soil heavy metals to crops, this requires long-term screening and optimization work, and optimization The methods used in the process are also different. For hyperaccumulators of heavy metals such as amaranth, the prior art does not provide soil amendments that can effectively reduce their heavy metal pollution in the soil, let alone screening and inhibiting soil heavy metal pollution. method of soil conditioner

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0044] Example 1: Screening test of amaranth pollution countermeasure varieties (Cd-PSC) with low accumulation of Cd

[0045] This experiment was carried out in the Heshan Institute of Agricultural Sciences, and the soil Cd pollution level was slightly polluted (0.400 mg·kg -1 ), and set up a control (soil Cd content of 0.121mg·kg -1 ). 29 varieties of amaranth (Amaranthus.mangostanus L) were purchased from various places. The trial period was July 2006. 16 healthy and uniform seeds were selected from the tested amaranth varieties and planted in the pots. Thin out the seedlings after 10 days, and keep 8 plants in each pot. After 20 days, the seedlings were settled, and 4 plants were kept in each pot. During the test period, watering was performed regularly according to the weather and plant growth conditions. Samples were taken after 42 days of growth.

[0046] The test results showed that under the control conditions, the Cd accumulation in the edible part of all teste...

Embodiment 2

[0048] Example 2: Screening test of amaranth pollution countermeasure varieties (Cd+Pb-PSC) with low accumulation of Cd and Pb

[0049] This experiment was carried out at the Heshan Institute of Agricultural Sciences, and the soil was set as a control (the soil Cd concentration was 0.17 mg·kg -1 , Pb concentration is 37mg·kg -1 ), high Pb pollution (Cd 0.17mg·kg -1 , Pb 321mg·kg -1 ), high Cd pollution (Cd 0.64mg·kg -1 , Pb 37mg·kg -1 ) and high Cd and high Pb compound pollution (Cd 0.64mg·kg -1 , Pb 321mg·kg -1 ). The test time was October 2006. The seeds of one amaranth variety (Cd-PSC) and three Cd-accumulating amaranth varieties obtained from the above experiment were sown into the above four groups of test soils. Thin out the seedlings after 10 days, and keep 8 plants in each pot. After 20 days, the seedlings were settled, and 4 plants were kept in each pot. During the test period, watering was performed regularly according to the weather and plant growth condit...

Embodiment 3

[0053] Example 3: Screening of special agricultural materials for the absorption and accumulation of Cd and Pb and the determination of the concentration of amaranth pollution countermeasure varieties (Cd+Pb-PSC) Cd and Pb to inhibit the low accumulation of cadmium and lead

[0054] This experiment was carried out on the campus of Sun Yat-sen University, the soil used in the experiment was Cd and Pb compound polluted soil, and the Cd concentration in the soil was 1.84mg·kg -1 , Pb concentration is 80.9mg·kg -1 . The trial period was April 2008. Four organic materials ryegrass (A), rice straw (B), bean shedding (C), chicken manure (D) and two inorganic materials Ca(OH) 2 (E) and Na 2 SiO 7 (F) Apply Cd and Pb compound polluted soil respectively, each material is set to low (L: organic material<1%; inorganic material<1‰), medium (M: 1%<organic material<2%; 1‰< Inorganic materials<2‰) and high (H: 2%<organic materials<4%; 2‰<inorganic materials<3‰) three levels of treatment ...

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Abstract

The invention relates to a method for reducing pollutions to amaranths by heavy metals of cadmium and lead in soil, which comprises the following steps: firstly, screening an amaranth pollution strategy variety (Cd+Pb-PSC) with low accumulation of the cadmium and the lead; and secondly, planting the amaranth pollution strategy variety (Cd+Pb-PSC) with the low accumulation of the cadmium and the lead, and cooperatively employing a special soil conditioner for inhibiting the amaranth pollution strategy variety (Cd+Pb-PSC) with the low accumulation of the cadmium and the lead from absorbing the cadmium and the lead in the planting process. The method of the invention effectively reduces the absorption of Cd and Pb by the amaranths and reduces the pollutions to the amaranths by the heavy metals of the cadmium and the lead in the soil by screening the amaranth pollution strategy variety (Cd+Pb-PSC) with the low accumulation of the cadmium and the lead and employing the special soil conditioner for inhibiting the amaranth pollution strategy variety (Cd+Pb-PSC) with the low accumulation of the cadmium and the lead from absorbing the cadmium and the lead.

Description

technical field [0001] The invention relates to the technical field of comprehensive treatment of heavy metal polluted soil, in particular to a method for reducing soil heavy metal cadmium and lead pollution of amaranth. Background technique [0002] Soil heavy metal pollution has become a major environmental problem worldwide. It is estimated that millions of tons of toxic heavy metals are released into the environment every year in the world (Nriagu et al., 1988), a considerable part of which enters farmland soil through irrigation water and atmospheric deposition, and heavy metal pollution in soil in my country is particularly serious . According to statistics, the currently polluted cultivated land area in China is nearly 20 million hectares, accounting for about 1 / 5 of the total cultivated land area (Wei Chaoyang and Chen Tongbin, 2001). But due to enormous population pressure, most of the contaminated farmland is still used for crop production. For example, the Pb co...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B09C1/10
Inventor 杨中艺周轶慧袁剑刚薛梦戴洪文
Owner SUN YAT SEN UNIV
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