Preparation method and application of compound heavy metal passivating agent suitable for southern acid red soil

A technology of heavy metal passivation agent and acid red, which is applied in application, fertilizer mixture, organic fertilizer, etc., can solve the problems of slow plant growth, low survival rate, poor long-term passivation effect, etc., and achieve the goal of accelerating fixation and prolonging release time Effect

Active Publication Date: 2019-01-25
NANCHANG INST OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] Therefore, the technical problem to be solved in the present invention is to overcome the short action time and poor long-term passivation effect of the soil conditioner in the prior art, so that the growth of plants (such as camphor seedlings) is slow and the survival rate is low, thereby providing a suitable Composite heavy metal passivator for southern acidic red soil and preparation method thereof

Method used

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  • Preparation method and application of compound heavy metal passivating agent suitable for southern acid red soil
  • Preparation method and application of compound heavy metal passivating agent suitable for southern acid red soil
  • Preparation method and application of compound heavy metal passivating agent suitable for southern acid red soil

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Effect test

Embodiment 1

[0035] The raw material composition of core particle in the present embodiment is: magnetic ferric oxide 10kg, lime nitrogen 2kg, binder is: sodium carboxymethyl cellulose 0.2kg and water 1.8kg;

[0036] The raw material composition of the slow-release layer is: humic acid mineral powder 10kg, nitrogen, phosphorus and potassium fertilizer 10kg, binder: sodium carboxymethyl cellulose 0.4kg and water 3.6kg, slow-release material: sodium alginate 5kg and chitosan 5kg;

[0037] The raw material composition of the quick-release layer is: 30kg of humic acid mineral powder, 2.5kg of calcium oxide, 2.5kg of calcium hydroxide, and the binder is: 0.4kg of sodium carboxymethyl cellulose and 3.6kg of water.

[0038] The preparation method of the binder solution is as follows: adding sodium carboxymethylcellulose into water, adjusting the rotation speed of a dispersing homogenizer to 8000 rpm to disperse evenly, and preparing the binder solution.

[0039] The preparation method of composit...

Embodiment 2

[0044] The raw material composition of core particle in the present embodiment is: magnetic ferric oxide 5kg, limestone 10kg, binder is: starch 0.2kg, sodium carboxymethyl cellulose 0.2kg and water 3.6kg;

[0045] The raw material composition of the slow-release layer is: humic acid mineral powder 5kg, nitrogen, phosphorus and potassium fertilizer 30kg, binder: starch 0.5kg, sodium carboxymethyl cellulose 0.5kg and water 9.0kg, slow-release material: sodium alginate 2.5kg and chitosan 2.5kg;

[0046] The raw material composition of the quick-release layer is: humic acid mineral powder 10kg, magnesium oxide 10kg, binder: starch 0.5kg, carboxymethyl cellulose sodium 0.5kg and water 9.0kg.

[0047] The preparation method of the binder solution is as follows: adding starch and sodium carboxymethylcellulose into water respectively, adjusting the rotating speed of a dispersing homogenizer to 12000 rpm to disperse evenly, then mixing, and stirring magnetically for 10 minutes to prepa...

Embodiment 3

[0053] The raw material composition of core particle in the present embodiment is: magnetic ferric oxide 7.5kg, magnesium carbonate 6kg, binder is: starch 0.15kg, sodium carboxymethyl cellulose 0.15kg and water 2.7kg;

[0054] The raw material composition of the slow-release layer is: humic acid mineral powder 7.5kg, nitrogen, phosphorus and potassium fertilizer 20kg, binder: starch 0.4kg, sodium carboxymethyl cellulose 0.4kg and water 7.2kg, slow-release material: sodium alginate 3kg and chitosan 4kg;

[0055] The raw materials of the quick-release layer are: humic acid mineral powder 20kg, calcium hydroxide 7.5kg, binders: starch 0.4kg, carboxymethylcellulose sodium 0.4kg and water 7.2kg.

[0056] The preparation method of the binder solution is as follows: adding starch and sodium carboxymethylcellulose into water respectively, adjusting the rotating speed of a dispersing homogenizer to 8000 rpm to disperse evenly, then mixing, and stirring magnetically for 30 minutes to pr...

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Abstract

The invention discloses a preparation method and an application of a compound heavy metal passivating agent suitable for southern acid red soil. The compound heavy metal passivating agent sequentiallycomprises a core particle, a slow-release layer and a quick-release layer from inside to outside, the slow-release layer covers the core particle, and the quick-release layer covers the slow-releaselayer. The core particle comprises, by weight, 5-10 parts of heavy metal adsorbing materials, 2-10 parts of acid changing substances and 2-5 parts of adhesives. The slow-release layer comprises, by weight, 5-10 parts of humic acid ore powder, 10-30 parts of nitrogen, phosphorus and potassium fertilizers, 4-10 parts of binding agents and 5-10 parts of sustained-release materials. The quick-releaselayer comprises, by weight, 10-30 parts of humic acid ore powder, 5-10 parts of acid changing substances and 4-10 parts of adhesives. The compound heavy metal passivating agent can passivate availableheavy metal in the acid red soil, the content of the available heavy metal is obviously reduced, the compound heavy metal passivating agent can rapidly play a role, the improved period of the soil isshortened, the passivating agent can be also released to improve the soil for a long time and has the functions of improving soil acidity and supplying plant nutrient, the survival rate of seedlingscan be increased, and growth and development of the seedlings are promoted.

Description

technical field [0001] The invention relates to the technical field of soil improvement, in particular to a preparation method and application of a compound heavy metal passivator suitable for southern acidic red soil. Background technique [0002] Camphor tree, with dense leaves, large crown and strong shade, majestic tree, can smoke and block dust, conserve water, fix soil and prevent sand, and beautify the environment. It is a common tree species for greening in southern cities and plays a positive role in improving the ecological environment of urban areas. It is often planted in industrial and mining enterprise parks, residential quarters, schools, institutions, factories, roadsides or other densely populated urban areas. However, in recent years, with the acceleration of urbanization and the needs of social development, the unreasonable mining of mineral resources by industrial and mining enterprises, the wanton discharge of "three wastes" in industrial production, etc...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C05G3/00C05G3/04C05G3/80
CPCC05C7/00C05G3/00C05G3/80C05G5/30C05D3/00C05D3/02C05D9/02C05F11/02
Inventor 张杰金志农刘佳徐昌旭张海燕吕雄伟赵娇金晓芳肖祖飞肖昌龙
Owner NANCHANG INST OF TECH
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