Repairing chemical agent for reducing cadmium contamination of crops and using method

A repair agent and crop technology, applied in the field of repair agents to reduce heavy metal cadmium pollution in crops, can solve the problems of high repair cost, long treatment cycle, secondary pollution, etc., achieve good treatment effect, reduce cadmium content, and reduce cadmium content Effect

Active Publication Date: 2016-03-09
衡阳县沛科生态科技有限责任公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, there are disadvantages in this method: high repair costs, high energy consumption, and even secondary pollution
The disadvantages are: long treatment cycle, late plant mobilization, complicated treatment process, long maintenance management cycle

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] The raw materials citric acid, tea saponin, ammonium persulfate and zeolite are weighed according to mass percentage, the ratio is citric acid: tea saponin: ammonium persulfate: zeolite=10:25:5:60, add water to mix citric acid and tea soap The element is prepared as a 60 mass % mixed solution, and ammonium persulfate and zeolite are made into a material with a particle size of 200 mesh. All substances are mixed evenly to obtain the repairing agent.

[0029] Test site: a rice planting area in Changsha County, Hunan Province

[0030] (1) Using the cadmium detection method stipulated in the "National Food Safety Standard for the Determination of Cadmium in Food" (GB5009.15-2014), the cadmium content in the rice planted in this area was determined to be 0.55mg / kg, and the "Soil Environmental Quality Standard "(GB15618-2008) specified in the heavy metal detection method to determine the cadmium content in soil samples, the maximum detection content of 2.94mg / kg.

[0031] (...

Embodiment 2

[0035] The preparation of the restoration agent is the same as in Example 1, except that 35 parts by weight of citric acid is used instead of 10 parts by weight of citric acid and 25 parts by weight of tea saponin. The experiment was also carried out in the rice planting area of ​​Changsha County, Hunan Province. As a result, after the rice matured, the rice and soil were sampled and tested: the maximum cadmium content of the treated rice planted was 0.091 mg / kg.

Embodiment 3

[0037] The preparation of the restoration agent is the same as in Example 1, except that 35 parts by weight of tea saponin is used instead of 10 parts by weight of citric acid and 25 parts by weight of tea saponin. The experiment was also carried out in the rice planting area of ​​Changsha County, Hunan Province. As a result, after the rice matured, the rice and soil were sampled and tested: the maximum cadmium content of the treated rice planted was 0.095mg / kg.

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Abstract

The present invention discloses a repairing chemical agent for reducing cadmium contamination of crops and a using method. The repairing chemical agent comprises the following raw materials: 5-45 parts by weight of a natural surfactant, 4-15 parts by weight of an oxidant and 10-60 parts by weight of a silicate mineral material. On one hand, the repairing chemical agent disclosed by the present invention, through irrigation and other farming activities, can be adsorbed on the surfaces of soil particles, so that a property of a solid-liquid interface is changed, the adhesion between cadmium ions in soil and the soil is weakened, the separation of heavy metal ions from the soil is promoted, the heavy metal ions generate a complex with active materials, and thus, the absorption of heavy metals by the crops is reduced. On the other hand, the repairing chemical agent reacts with unstable cadmium in the heavy metal contaminated soil, and stable insoluble cadmium salt precipitation is generated, so that the cadmium content in the planted crops is significantly reduced, and the requirements on the quality of safe agricultural products are met.

Description

technical field [0001] The invention relates to the field of quality and safety of agricultural products, in particular to a restoration agent for reducing heavy metal cadmium pollution of agricultural crops and a use method thereof. Background technique [0002] Since the discovery of cadmium in the early 20th century, the output of cadmium has increased year by year. The main sources of pollution are lead-zinc mines, non-ferrous metal smelting, electroplating, and factories using cadmium compounds as raw materials or catalysts. A considerable amount of cadmium is discharged into the environment through waste gas, waste water, and waste residues, causing pollution. At present, cadmium pollution is widespread all over the world. Cadmium entering the human body, in addition to causing osteoporosis, bone atrophy, and joint pain, is mainly accumulated in the liver, kidney, pancreas, thyroid, and bones. It can cause pathological changes in kidney organs, etc., and affect peopl...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09K17/40B09C1/08C09K101/00
CPCB09C1/08B09C2101/00C09K17/40C09K2101/00
Inventor 陈建芝李端峰邓培红
Owner 衡阳县沛科生态科技有限责任公司
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