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Slow release fertilizer having soil remediation function and soil contamination remediation method

A slow-release fertilizer and soil remediation technology, applied in the field of slow-release fertilizers, can solve the problems of low soil remediation efficiency, shortening plant growth cycle, and no long-term effectiveness, so as to achieve good biological activity and complete biodegradability, and avoid repeated The effect of repeated fertilization to promote continuous and rapid growth

Active Publication Date: 2010-12-29
SHENZHEN ECOMANN BIOTECH
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The technologies disclosed in the above patents are all effective ways to improve soil heavy metal pollution, but most of them have not proposed how to achieve long-term effectiveness and shorten the plant growth cycle. In the actual application process, the cost is high, the efficiency of soil remediation is low, and the scope of application is narrow.
In particular, most plants in heavy metal-polluted soils are difficult to grow or grow slowly due to soil deterioration and lack of nutrients, which is not conducive to the absorption of heavy metals or takes a long time to repair and is inefficient. It is also easy to Fertilizers are lost due to the action of rainwater or surface water, requiring multiple fertilization, which is costly and extremely cumbersome to operate

Method used

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  • Slow release fertilizer having soil remediation function and soil contamination remediation method

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Effect test

Embodiment 1

[0042] Mix 20 parts of poly-3-hydroxybutyrate powder, 35 parts of diatomaceous earth, 2 parts of ammonium phosphate, 5 parts of urea, 23 parts of humic acid, 5 parts of bentonite, and 10 parts of wood flour into a 100L granulator to prepare Particles with a size of about 1mm are evenly spread in the farmland polluted by mine Pb and Zn at a rate of 500Kg / mu. After plowing, buckwheat and wild chrysanthemum are planted. After 60 days of planting, the above-ground parts of buckwheat and wild chrysanthemum are collected, and their lead content is tested. 128mg / kg, 113mg / kg, the zinc content in Chrysanthemum chrysanthemum reached 212mg / kg, planted 4 times continuously, the Pb metal content in the soil dropped from 800mg / kg to below 200mg / kg, and the Zn content dropped from 1080mg / kg to Below 250mg / kg, basically meet the requirements of the national standard; fertilize twice within a year, can realize more than 5 times of continuous plowing and planting, short cycle, low cost and high...

Embodiment 2

[0044] 20 parts of PHBV powder with comonomer HV (3-hydroxyvaleric acid) content of 10%, 30 parts of diatomaceous earth, 1 part of ammonium phosphate, 2 parts of ammonium chloride, 1.5 parts of potassium chloride, 30 parts of humic acid 15.5 parts of brucite were mixed and added to a 100L granulator to prepare particles of about 1mm, and evenly spread at 1 ton / mu in the soil polluted by copper, lead, and cadmium in industrial area sewage, and planted ryegrass and tall sheep after plowing Grass, the lawn was harvested 45 days after planting, and the copper content in the lawn was detected to be 126mg / kg, and the cadmium content was 214mg / kg. Fertilization was carried out three times in two years, and the continuous planting was more than 10 times. The copper content in the soil was reduced from 3000mg / kg to 150mg / kg. kg, lead content decreased from 1800mg / kg to 250mg / kg, cadmium content decreased from 2450mg / kg to 300mg / kg.

Embodiment 3

[0046] Mix 25 parts of P3HB4HB powder with 15% content of comonomer 4HB (4-hydroxybutyric acid), 25 parts of diatomaceous earth, 3 parts of ammonium phosphate, 5 parts of ammonium bicarbonate, 35 parts of humic acid and 7 parts of fly ash Add it into a 100L granulator to prepare particles of about 1mm, spread it evenly at 800Kg / acre in the soil of the garbage recycling treatment station polluted by heavy metals such as lead and chromium, plant bald sore flowers and jasmine flowers, and uproot them after 60 days of planting, and concentrate them for treatment. Then replanted and planted several times continuously, the total content of heavy metals in the soil dropped from 6000mg / kg to 756mg / kg.

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Abstract

The invention discloses a slow release fertilizer having a soil remediation function. The slow release fertilizer is prepared by mixing fully-biodegradable polyhydroxyalkanoates and organic and inorganic nutrient substances. The fully-biodegradable polyhydroxyalkanoates is slowly degraded under the actions of soil microorganisms to provide nutrient substances needed by the growth of the soil microorganisms so as to promote the ionization effects of the soil microorganisms on heavy metals and release the organic and inorganic nutrient substances by slow degradation so as to promote durable and rapid growth of plants and improve soil remediation efficiency. The invention also discloses a soil contamination remediation method for using the slow release fertilizer. High-efficiency, environmentally-friendly and durable remediation of heavy metal-contaminated soil is realized by planting plants having hyper-accumulation capability to absorb and extract the heavy metals in the soil to which the slow release fertilizer is applied.

Description

【Technical field】 [0001] The invention relates to a slow-release fertilizer with soil remediation effect and a method for remediating heavy metal soil pollution using the slow-release fertilizer. 【Background technique】 [0002] With the wide application of modern industrial products and large-scale mining of mines, various heavy metals are also brought into the soil, and the scope of polluted soil and farmland continues to expand. Soil heavy metal pollution not only has a great impact on the yield and quality of crops It also affects water quality, and even endangers human health through ecological chains such as plant absorption. Due to the migration and accumulation of heavy metals, it is easy to enter the human body through the food chain, and accumulate to a certain extent to seriously endanger human health. Cases in this regard at home and abroad There are many reports, such as bone pain disease caused by cadmium pollution in Japan, "cadmium" rice in Shenyang, Chengdu, ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C05G3/00C05G3/04B09C1/00B09C1/10C05G3/80
Inventor 钟路华蓝小平
Owner SHENZHEN ECOMANN BIOTECH
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