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Ferrous modified selenium sol for inhibiting cadmium-arsenic accumulation of paddy rice as well as preparation method and application thereof

一种硒溶胶、亚铁的技术，应用在溶胶制备、植物学设备和方法、应用等方向，达到制备工艺简便、提高农作物安全性、颗粒均匀细小的效果

Active Publication Date: 2018-12-11
GUANGDONG INST OF ECO ENVIRONMENT & SOIL SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

But so far, the preparation of ferrous-modified selenium sol and its application in the absorption and accumulation of cadmium and arsenic in rice have not been reported.

Method used

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  • Ferrous modified selenium sol for inhibiting cadmium-arsenic accumulation of paddy rice as well as preparation method and application thereof
  • Ferrous modified selenium sol for inhibiting cadmium-arsenic accumulation of paddy rice as well as preparation method and application thereof
  • Ferrous modified selenium sol for inhibiting cadmium-arsenic accumulation of paddy rice as well as preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0055] Embodiment 1: the preparation of ferrous modified selenium sol I

[0056] (1) Preparation of iron-selenium mixed solution: Weigh 14.5g ferric chloride (containing 5g of iron element) and 1g of sodium selenite (containing 0.5g of selenium element), add 84.5mL deionized water, stir evenly, fully After dissolving, a mixed solution containing iron and selenium is obtained;

[0057] (2) Under the condition of water bath, the temperature is controlled at 35°C, and slowly add 47g of ascorbic acid (the molar ratio to the iron ion in the mixed solution is 3:1) to the above-mentioned selenium-iron mixed solution; stir while adding, and continue to stir after adding 5 minutes; when the pink precipitate is no longer produced, slowly add 24.6g of potassium carbonate (the molar ratio to the iron ion in the mixed solution is 2:1); stir while adding, and continue to stir for 5 minutes after adding; until no longer Precipitation occurred and stirring was stopped. The precipitate was f...

Embodiment 2

[0061] Embodiment 2: the preparation of ferrous modified selenium sol II

[0062] (1) Preparation of iron-selenium mixed solution: take by weighing 11.34g ferric chloride (containing iron element 5g), 21.61g iron nitrate (containing iron element 5g), 21.88g iron citrate (containing iron element 5g), 2.25g selenium acid (containing 1.25g of selenium), and 2.04g of selenous acid (1.25g of selenium); add 141mL of deionized water, stir evenly, and after fully dissolving, a mixed solution containing iron and selenium is obtained;

[0063] (2) Under the condition of water bath, the temperature is controlled to be 85°C. In the above-mentioned selenium-iron mixed solution, slowly add 66g ascorbic acid (the molar ratio with the iron ion in the mixed solution is 1.4:1) and 10.28g reduced glutathione ( and the mol ratio of iron ions in the mixed solution is 0.1:1); Stir while adding, and continue to stir for 15 minutes after adding; when the pink precipitate is no longer produced, slowly...

Embodiment 3

[0067] The preparation of embodiment 3 ferrous modified selenium sol III

[0068] (1) Preparation of mixed solution containing iron and selenium: Weigh 27.1g of ferrous sulfate (containing 10g of iron element) and 10g of sodium selenite (containing 5g of selenium element), add 63mL of deionized water, stir well, after fully dissolving , to prepare a mixed solution containing iron and selenium;

[0069] (2) Under the condition of water bath, the temperature is controlled to be 50°C. To the above-mentioned selenium-containing iron mixed solution, slowly add 62.86g of ascorbic acid (the molar ratio to the iron ion in the mixed solution is 2:1) and; stir while adding, after adding, Continue to stir for 10 minutes; when the pink precipitate is no longer produced, slowly add 24.6g potassium carbonate and 18.9g sodium carbonate (the molar ratio to the iron ion in the mixed solution is 1:1); stir while adding, and continue Stir for 10 minutes; stop stirring until no more precipitatio...

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Abstract

The invention discloses ferrous modified selenium sol for inhibiting cadmium-arsenic accumulation of paddy rice as well as a preparation method and application thereof. The preparation method for theferrous modified selenium sol comprises the following steps that (1) an iron-containing compound and a selenium-containing compound are dissolved into water so as to obtain a mixed solution containingiron and selenium; (2) a reducing agent is added into the mixed solution, when stirring is carried out until no precipitate is generated, carbonate is added, stirring is carried out until no precipitate is generated, filtering is carried out, and the precipitate is taken and washed so as to obtain a selenium elementary substance and a ferrous carbonate precipitate; (3) an emulsifier is added intoa citric acid buffer solution so as to obtain an emulsified citric acid buffer solution; (4) the selenium elementary substance and the ferrous carbonate precipitate are added into the emulsified citric acid buffer solution so as to obtain a sol system; and (5) the sol system is evaporated and concentrated, and the pH value is adjusted to be 4.5-8.5 so as to obtain the ferrous modified selenium sol for inhibiting cadmium-arsenic accumulation of the paddy rice. The ferrous modified selenium sol prepared through the method has the advantages that the content of cadmium and arsenic in rice can beeffectively decreased, and therefore the safe production of the rice is realized.

Description

technical field [0001] The invention belongs to the technical field of soil heavy metal remediation, and in particular relates to a ferrous-modified selenium sol for inhibiting the accumulation of cadmium and arsenic in rice and its preparation method and application. Background technique [0002] Soil cadmium and arsenic pollution control is a major environmental problem facing our country, especially rice field pollution. It is very difficult to control cadmium and arsenic pollution in rice fields, and there are many technical bottlenecks; it is difficult to solve the problem of regional cadmium and arsenic pollution in rice fields by using phytoremediation, chemical leaching and other removal technologies. Preventing the accumulation of cadmium and arsenic in rice is a low-cost, easy-to-apply large-scale technical approach to reduce the cadmium and arsenic content of agricultural products. [0003] Cadmium is a non-essential element in rice. It can compete with the trans...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): A01N59/16A01N59/02A01N25/04A01P21/00
CPCA01N25/04A01N59/02A01N59/16B01J13/0013C01B19/02C01G49/00C01G49/009C05D9/02C05G5/23B01J13/0034B01J13/0043
Inventor 李芳柏刘传平崔江虎
Owner GUANGDONG INST OF ECO ENVIRONMENT & SOIL SCI
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