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Photocatalytically degraded slow-release coated fertilizer and preparation method thereof

A slow-release package and photocatalytic technology, applied in fertilizer mixtures, fertilization devices, applications, etc., can solve the problems of reducing the catalytic degradation ability of zinc sulfide and the low efficiency of zinc sulfide cycle catalytic utilization, so as to enhance the adsorption and immobilization capacity, improve Effect of light absorption efficiency and photocatalytic efficiency improvement

Inactive Publication Date: 2018-01-19
王玉红
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  • Abstract
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  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, during the photodegradation process of zinc sulfide, the electrons transitioned to the conduction band and the holes left in the valence band are easy to recombine, which reduces the catalytic degradation ability of zinc sulfide, and the recycling catalytic utilization efficiency of powdered zinc sulfide is relatively low.

Method used

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Examples

Experimental program
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Effect test

Embodiment Construction

[0020] A photocatalytic degradation slow-release coated fertilizer, prepared by the following method:

[0021] (1) Mix bean curd residue, pig farm excrement and plant ash into the fermentation tank according to the mass ratio of 20:46:7, add water and control the weight ratio of material to water to 1:1.5, and ferment for 6 days, during which the fermentation is maintained by turning over the pile The internal temperature of the pile is at 45°C, then add 0.03% by weight of Clostridium pasteuriani bacteria agent and replenish water until the weight ratio of material to water is 1:1.0, seal the fermentation pile, and ferment for 13 days without oxygen. Dry at low temperature at ℃ and crush through a 60-mesh sieve for later use;

[0022] (2) Grind the corn starch twice with a jet mill, and then mill it in a ball mill for 4 hours to obtain superfine starch, dissolve it in water 9 times its mass, heat it to 70°C, and add 0.2% acrylic acid to it Ester, stirred at 200 rpm for 20 min...

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PUM

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Abstract

The invention discloses photocatalytically degraded slow-release coated fertilizer and a preparation method thereof. The photocatalytically degraded slow-release coated fertilizer is prepared from thefollowing raw materials: corn starch, acrylic ester, tofu residue, pig farm excrement and urine, plant ash, graphite, potassium permanganate, hollow fly ash microspheres, zinc acetate, and the like.The fertilizer provided by the invention is completely prepared from organic components, ultrafine corn starch and the acrylic ester are used as a coating material at the outer layer, the coating material is stable in properties in the soil and has an ideal slow-release effect, and compound nutrient particles and a zinc sulfide composite material are used at the inner layer; due to the diversity of nutrients, the photocatalytically degraded slow-release coated fertilizer can meet the multiple demands of plants for the nutrition; furthermore, the photocatalytically degraded slow-release coatedfertilizer can purify the soil environment, has an excellent catalytic degradation effect on pathogenic microorganisms, organic pesticide residues and the like in the soil, and is good in economic andenvironmental benefits, thus being suitable for being applied to large-scale cultivation.

Description

technical field [0001] The invention relates to the technical field of fertilizers, in particular to a photocatalytic degradation slow-release coated fertilizer and a preparation method thereof. Background technique [0002] China's fertilizer production and consumption account for about 30% of the world's total, while the average fertilizer utilization rate is only about 33%. The loss of fertilizer not only causes a huge waste of resources, but also brings serious pollution to soil, water and the atmosphere. Research and development of controlled and slow-release fertilizer preparation technology to reduce the total amount of fertilizer application is an important measure to achieve sustainable agricultural development. [0003] Most of the slow-release fertilizers currently on the market are facing many problems. One is that a large amount of greenhouse gases are likely to be generated during the preparation process, and are discharged into the atmosphere without control, ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C05G3/00C05G3/04C05G3/80
Inventor 王玉红
Owner 王玉红
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