Cadmium passivating agent with improved soil function and production method thereof

A production method and soil improvement technology, applied in chemical instruments and methods, soil conditioning materials, organic fertilizers, etc., can solve the problems of increased cost, inconvenient use, single function, etc. Earth strength, activity-reducing and effectiveness effects

Active Publication Date: 2017-10-24
INST OF ENVIRONMENT & SUSTAINABLE DEV IN AGRI CHINESE ACADEMY OF AGRI SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although many passivators have been developed in recent years, in fact there are very few passivators with the above characteristics, especially inconvenient use, high cost increase, and single function, etc., which have largely restricted their use. Bottlenecks in area promotion and application

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0074] Embodiment 1: the present invention has the production of the cadmium passivator of soil improvement function

[0075] The implementation steps of this embodiment are as follows:

[0076] A. Crop straw pretreatment

[0077] The naturally dried rice stalks are chopped into 10-30cm long stalks, and then carbonized at a temperature of 400°C in a self-ignition carbonization furnace sold by Fuwei Heavy Industry Machinery Factory in Gongyi City, Henan Province under the trade name "Fuwei Heavy Industry". 1.8h, get rice straw biochar, then crush and sieve, collect rice straw biochar with diameter less than 1mm;

[0078] B. Preparation of Fulvic Acid Mixture

[0079] Add solid calcium carbonate equivalent to 3.8% of the weight of the stock solution containing fulvic acid to the stock solution containing fulvic acid with a concentration of 40g / L sold by Shandong Quanlin Jiayou Fertilizer Co., Ltd. under the trade name "Huangfutian". 0.5% potassium dihydrogen phosphate, stir a...

Embodiment 2

[0087] Embodiment 2: the present invention has the production of the cadmium passivator of soil improvement function

[0088] The implementation steps of this embodiment are as follows:

[0089] A. Crop straw pretreatment

[0090] The naturally dried wheat straw is chopped into 10-30cm long pieces, and then carbonized at a temperature of 400°C at a temperature of 3.0 h, obtaining wheat straw biochar, then crushing and sieving to collect wheat straw biochar with a diameter of less than 1 mm;

[0091] B. Preparation of Fulvic Acid Mixture

[0092] Add solid calcium hydroxide equivalent to 2.5% of the weight of the stock solution containing fulvic acid to the 50g / L stock solution containing fulvic acid sold by Shandong Quanlin Jiayou Fertilizer Co., Ltd. under the trade name "Huangfutian" , 1.5% potassium dihydrogen phosphate, stirred and mixed evenly to obtain a mixture containing fulvic acid;

[0093] c. to mix

[0094] According to the weight ratio of the fulvic acid-cont...

Embodiment 3

[0100] Embodiment 3: the present invention has the production of the cadmium passivating agent of improving soil function

[0101] The implementation steps of this embodiment are as follows:

[0102] A. Crop straw pretreatment

[0103] Cut the naturally dried corn stalks into 10-30cm long pieces, and then carbonize them at a temperature of 350 °C for 2.5 h, obtain corn stalk biochar, then pulverize and sieve, and collect corn stalk biochar with a diameter of less than 1mm;

[0104] B. Preparation of Fulvic Acid Mixture

[0105] Add solid calcium carbonate equivalent to 7.5% of the weight of the stock solution containing fulvic acid to the stock solution containing fulvic acid with a concentration of 44g / L sold by Shandong Quanlin Jiayou Fertilizer Co., Ltd. under the trade name "Huangfutian". 1.2% potassium dihydrogen phosphate, stirred and mixed evenly to obtain a mixture containing fulvic acid;

[0106] c. to mix

[0107] According to the weight ratio of the mixture con...

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Abstract

The invention relates to a cadmium passivating agent with an improved soil function and a production method thereof. The production method comprises the following steps: pre-processing crop straw, preparing a fulvic acid mixture, mixing, drying and the like. According to the cadmium passivating agent disclosed by the invention, the effectiveness of cadmium in soil can be greatly reduced, and the absorption amount of the crop on the cadmium is reduced; moreover, the physical and chemical properties of soil and the soil fertility are improved at the same time, and the cadmium passivating agent has generality. The cadmium passivating agent disclosed by the invention has an important application and popularization value in a high-risk area of out-of-standard cadmium content of soil and a cadmium middle-pollution and mild-pollution area, and has very remarkable social, ecological and economic benefits.

Description

【Technical field】 [0001] The invention belongs to the technical field of soil restoration and soil improvement. More specifically, the present invention relates to a cadmium passivator with the function of improving soil, and also relates to a production method of the cadmium passivator with the function of improving soil. 【Background technique】 [0002] In recent years, heavy metal pollution in cultivated land in my country has shown a high incidence trend. The heavy metal content in cultivated land in high-risk areas such as industrial and mining areas and typical sewage irrigation areas exceeds the standard seriously. Some major agricultural production areas also have excessive heavy metal content to varying degrees. According to the "National Soil Pollution Survey Bulletin" jointly issued by the Ministry of Environmental Protection and the Ministry of Land and Resources in April 2014, the rate of sites with excessive levels of pollutants in the country's soil was 16.1%. ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09K17/40C09K101/00
CPCC09K17/40C09K2101/00
Inventor 曾希柏王亚男苏世鸣白玲玉郭良进黄道友
Owner INST OF ENVIRONMENT & SUSTAINABLE DEV IN AGRI CHINESE ACADEMY OF AGRI SCI
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