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Heavy metal pollution saline-alkali soil improver by adopting calcined phosphogypsum

A phosphogypsum and heavy metal technology is applied in the field of heavy metal pollution saline-alkali soil modifiers, which can solve problems such as unsatisfactory effect, not very wide application range, plant hormone pollution, etc., and achieves solving the lack of trace elements, improving physical and chemical properties, and good adsorption. Effect

Inactive Publication Date: 2018-09-28
ANHUI MEILAN LANDSCAPE ENG CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The heavy metal-contaminated saline-alkali soil improver using calcined phosphogypsum is solid, which solves the shortcomings of liquid soil improvers that are easy to infiltrate and volatilize. It can effectively improve the state of soil particles and improve soil water retention performance, but the effect is not very ideal. The scope of application They are not very extensive. They are not practical in the seedling and production stages of various plants. They cannot be used to control the salinity that has been turned up when they encounter water. At the same time, plant hormones have certain pollution to the environment.

Method used

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  • Heavy metal pollution saline-alkali soil improver by adopting calcined phosphogypsum
  • Heavy metal pollution saline-alkali soil improver by adopting calcined phosphogypsum
  • Heavy metal pollution saline-alkali soil improver by adopting calcined phosphogypsum

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Effect test

Embodiment 1

[0033] The heavy metal-contaminated saline-alkali soil improver using calcined phosphogypsum in this embodiment includes the following components in parts by weight: 5 parts of biochar, 35 parts of calcined phosphogypsum, 15 parts of honeycomb coal ash, 4 parts of modified zeolite, and 5 parts of expanded perlite , 3 parts of humic acid powder, 2 parts of citric acid slag, 1 part of polyaluminum iron silicate, 2 parts of diatomaceous earth, 0.5 part of calcium activator, 0.2 part of compound biological agent, 3 parts of organic compound fertilizer.

[0034] Wherein, the biochar is mixed with rice husk charcoal, straw charcoal and cow dung charcoal according to the mass ratio of 1:0.8:1.2, after being fully ground, it passes through a 80-120 mesh sieve, and the re-powder is mixed evenly; wherein, the straw charcoal Cow dung charcoal is made by anaerobic pyrolysis at 550°C for 30 minutes, while rice husk charcoal is waste gas produced after straw power generation.

[0035] Where...

Embodiment 2

[0047] The heavy metal-contaminated saline-alkali soil improver using calcined phosphogypsum in this embodiment includes the following components in parts by weight: 12 parts of biochar, 55 parts of calcined phosphogypsum, 25 parts of honeycomb coal ash, 10 parts of modified zeolite, and 8 parts of expanded perlite , 8 parts of humic acid powder, 6 parts of citric acid slag, 5 parts of polyaluminum iron silicate, 4 parts of diatomaceous earth, 1.5 parts of calcium activator, 0.6 part of compound biological agent, 7 parts of organic compound fertilizer.

[0048] Wherein, the biochar is mixed with rice husk charcoal, straw charcoal and cow dung charcoal according to the mass ratio of 1:0.8:1.2, after being fully ground, it passes through a 80-120 mesh sieve, and the re-powder is mixed evenly; wherein, the straw charcoal Cow dung charcoal is made by anaerobic pyrolysis at 550°C for 30 minutes, while rice husk charcoal is waste gas produced after straw power generation.

[0049] W...

Embodiment 3

[0061] The heavy metal-contaminated saline-alkali soil improver using calcined phosphogypsum in this embodiment includes the following components in parts by weight: 9 parts of biochar, 45 parts of calcined phosphogypsum, 20 parts of honeycomb coal ash, 7 parts of modified zeolite, and 6.5 parts of expanded perlite , 5.5 parts of humic acid powder, 4 parts of citric acid slag, 3 parts of polyaluminum iron silicate, 3 parts of diatomaceous earth, 1 part of calcium activator, 0.4 part of compound biological agent, and 5 parts of organic compound fertilizer.

[0062] Wherein, the biochar is mixed with rice husk charcoal, straw charcoal and cow dung charcoal according to the mass ratio of 1:0.8:1.2, after being fully ground, it passes through a 80-120 mesh sieve, and the re-powder is mixed evenly; wherein, the straw charcoal Cow dung charcoal is made by anaerobic pyrolysis at 550°C for 30 minutes, while rice husk charcoal is waste gas produced after straw power generation.

[0063...

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Abstract

The invention discloses a heavy metal pollution saline-alkali soil improver by adopting calcined phosphogypsum and a preparation method thereof. The soil improver comprises the following components inparts by weight: 9 parts of charcoal, 45 parts of calcined phosphogypsum, 20 parts of honeycomb coal ash, 7 parts of modified zeolite, 6.5 parts of expanded perlite, 5.5 parts of a humic acid powder,4 parts of citric acid residues, 3 parts of poly-aluminum ferric silicate sulfate, 3 parts of diatomite, 1 part of a calcium activator, 0.4 part of a composite bacterial strain and 5 parts of an organic compound fertilizer. According to the soil improver disclosed by the invention, physical and chemical properties of the saline-alkali soil can be effectively improved, and the soil improver is short in time of saline-alkali soil improvement and fast in efficacy.

Description

technical field [0001] The invention relates to the technical field of soil improvement, in particular to a heavy metal-polluted saline-alkali soil improver using calcined phosphogypsum. Background technique [0002] Saline-alkali soil is a general term for saline soil and alkaline soil and various salinized and alkaline soils. Among them, saline soil refers to the soil that contains a large amount of soluble salts and makes most plants unable to grow, and its salt content is generally more than 0.6%; alkaline soil refers to the soil whose substitution rate (ESP) of sodium ion cation substitution exceeds 20%. strong alkaline soil. The physical and chemical properties of saline soil are poor. The main performance is that the salinity or alkalinity is too high, which leads to water shortage or poisoning of plant roots. Poor resistance, extremely unfavorable to agricultural production. [0003] To this end, the Chinese patent literature was searched. In the Chinese patent a...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09K17/40B09C1/08C05G3/00C05G3/04C09K101/00C09K109/00C05G3/80
CPCB09C1/08C05D3/02C05G3/00C05G3/80C09K17/40C09K2101/00C09K2109/00C05D9/00C05D9/02C05F11/02C05F11/08C05G1/00
Inventor 周克斌
Owner ANHUI MEILAN LANDSCAPE ENG CO LTD
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