Cadmium removing method for rice and products thereof

A rice and product technology, applied in the field of rice deep-processing food safety, can solve the problems of reducing effectiveness, not fundamentally solving the problems of cadmium removal, deepening cadmium deposition, etc., and achieves the effect of simple operation, remarkable treatment effect and wide application range

Inactive Publication Date: 2014-03-12
JIANGNAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Second, cadmium in untreated or substandard industrial wastewater enters the soil along with sewage irrigation, and the application of cadmium-containing chemical fertilizers or improper fertilization, as well as long-term fertilization and large-scale fertilization will deepen the deposition of cadmium in the soil
CN102197862A discloses a method for preventing cadmium in polluted rice from accumulating in the human body by reducing the effectiveness of cadmium, so that the cadmium in polluted rice becomes a precipitate that is almost insoluble in water, so that it cannot be absorbed by the human body, so as to prevent th

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0033] Cadmium removal experiment using commercially available rice as raw material

[0034] (1) Soak

[0035] Weigh 500g of rice, add 2500g of deionized water, stir evenly, and let stand at room temperature for 30min;

[0036] (2) Reaction

[0037] Add 30g of compound reactant to the soaked rice obtained in step (1), the stirring speed is 50r / min, and react for 1h, wherein the compound reactant is 40% citric acid, 40% sodium chloride, and 20% potassium chloride. become;

[0038] (3) washing

[0039] Filter the reaction liquid obtained in step (2) to remove the clear liquid, and add deionized water to wash repeatedly three times, and the amount of water added each time is 2500g;

[0040] (4) dry

[0041] The washed rice obtained in step (3) can be directly boiled and eaten or dried naturally.

[0042] After testing, the cadmium content of the raw rice was 0.4077mg / kg (dry basis), and the cadmium content of the rice after cadmium removal was 0.0803mg / kg (dry basis), and t...

Embodiment 2

[0044] Cadmium removal experiments were carried out using rice flour prepared from commercially available rice as raw material

[0045] (1) Soak

[0046] Weigh 500g of rice flour, add 2000g of deionized water, stir evenly, and let stand at room temperature for 30min;

[0047] (2) Reaction

[0048] Add 25g of compound reactant to the soaked rice flour obtained in step (1), the stirring speed is 50r / min, and react for 2h, wherein the compound reactant is 45% citric acid, 45% sodium chloride, and 10% potassium chloride. become;

[0049] (3) washing

[0050] Centrifuge the reaction solution obtained in step (2) to remove the supernatant, and add deionized water to wash three times, each centrifugation speed is 3000r / min, centrifugation is 10min, and the amount of water added each time is 2000g;

[0051] (4) dry

[0052] The washed rice noodles obtained in step (3) are dried.

[0053] After testing, the cadmium content of the raw rice noodles was 0.3243mg / kg (dry basis), and ...

Embodiment 3

[0055] Cadmium removal experiments were carried out using rice protein powder prepared from commercially available rice as raw material

[0056] (1) Soak

[0057] Weigh 500g of rice protein powder, add 2000g of deionized water, stir evenly, and let stand at room temperature for 30min;

[0058] (2) Reaction

[0059] Add 25g of compound reactant to the soaked rice protein powder obtained in step (1), stir at 50r / min, and react for 2h, wherein the compound reactant is 46% citric acid, 48% sodium chloride, 6% potassium chloride Composite;

[0060] (3) washing

[0061] Centrifuge the reaction solution obtained in step (2) to remove the supernatant, and add deionized water to wash three times, each centrifugation speed is 3000r / min, centrifugation is 10min, and the amount of water added each time is 2000g;

[0062] (4) dry

[0063] Drying the washed rice protein powder obtained in step (3).

[0064] After testing, the cadmium content of raw rice protein powder is 0.6812mg / kg (...

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PUM

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Abstract

The invention relates to a cadmium removing method for rice and products thereof. The method comprises the following steps: soaking, reacting, washing and drying and the like. By the method, the cadmium content in rice and rice products such as rice flour, starch, rice noodle, rice albumen powder and the like can be effectively reduced, with the cadmium removing rate of more than 70%; the method has the characteristics of simple process, relatively low production cost, strong applicability and the like.

Description

technical field [0001] The invention relates to a cadmium removal technology for rice and its products, and belongs to the technical field of rice deep-processing food safety. Background technique [0002] Soil is related to the quality of edible rice, and the adsorption of cadmium by rice is obviously stronger than that of other crops such as corn and soybean. Grains absorb and enrich cadmium from the soil through their roots. The main sources of cadmium in paddy fields are: First, cadmium in industrial waste gas diffuses with dust along with the wind, and enters the soil through rain and natural settlement. Second, cadmium in untreated or substandard industrial wastewater enters the soil along with sewage irrigation. In addition, the application of chemical fertilizers containing cadmium or improper fertilization, as well as long-term fertilization and large-scale fertilization will deepen the deposition of cadmium in the soil. [0003] When the environment is polluted by...

Claims

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Application Information

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IPC IPC(8): A23L1/015A23L5/20
CPCA23L5/27A23V2002/00A23V2300/14
Inventor 于秋生冯伟
Owner JIANGNAN UNIV
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