Acid soil conditioner and preparation method thereof

A technology of acidic soil and conditioner, applied in soil conditioning materials, botanical equipment and methods, plant growth regulators, etc., can solve environmental pollution and other problems

Active Publication Date: 2015-12-02
JIANGSU GOOD HARVEST WEIEN AGROCHEM
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Glyphosate waste liquid contains a large amount of organic phosphorus and other organic substances, and direct discharge will cause serious environmental pollution

Method used

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  • Acid soil conditioner and preparation method thereof
  • Acid soil conditioner and preparation method thereof
  • Acid soil conditioner and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0110] Example 1: Production of acidic soil conditioner

[0111] The implementation steps of this embodiment are as follows:

[0112] A. Preparation of phosphate-containing solids from glyphosate production waste liquid

[0113] (1) Precipitation of heavy metal ions

[0114] Let the glyphosate production waste liquid with pH 0.6 and pure hydrogen sulfide gas generated when glyphosate is produced by IDA method, the absorption tower sold by Suzhou Hongtuo Environmental Technology Co., Ltd. under the trade name HTV type vertical countercurrent packed tower Reacting in the medium for 5 hours under the conditions of temperature 5°C and pressure 0.1MPa, hydrogen sulfide reacts with heavy metal ions to form heavy metal sulfide precipitate, and separates to obtain a precipitate containing heavy metal sulfide and a precipitate mother liquor;

[0115] (2) Organophosphorus oxidation

[0116] Heat the precipitated mother liquor obtained in step (1) to a temperature of 60° C., and then,...

Embodiment 2

[0131] Example 2: Production of acidic soil conditioner

[0132] The implementation steps of this embodiment are as follows:

[0133] A. Preparation of phosphate-containing solids from glyphosate production waste liquid

[0134] (1) Precipitation of heavy metal ions

[0135] Let the glyphosate production waste liquid with pH 0.5 and pure hydrogen sulfide gas generated when glyphosate is produced by the IDA method be placed in the absorption tower sold by Yangzhou Hengtong Environmental Protection Technology Co., Ltd. under the trade name HLB type liquid absorption tower The reaction was carried out under the conditions of temperature 10°C and pressure 0.3MPa for 4 hours, hydrogen sulfide and heavy metal ions reacted to form a heavy metal sulfide precipitate, and a precipitate containing heavy metal sulfide and a precipitate mother liquor were obtained by separation;

[0136] (2) Organophosphorus oxidation

[0137] Heat the precipitated mother liquor obtained in step (1) to ...

Embodiment 3

[0152] Example 3: Production of acidic soil conditioner

[0153] The implementation steps of this embodiment are as follows:

[0154] A. Preparation of phosphate-containing solids from glyphosate production waste liquid

[0155] (1) Precipitation of heavy metal ions

[0156] Let the glyphosate production waste liquid with pH 1.0 and pure hydrogen sulfide gas generated when glyphosate is produced by the IDA method be heated at a temperature of 20°C in an absorption tower sold by Suzhou Lisheng Chemical Equipment Co., Ltd. React with a pressure of 0.5 MPa for 3 hours, hydrogen sulfide and heavy metal ions react to form a heavy metal sulfide precipitate, and separate a precipitate containing heavy metal sulfide and a precipitate mother liquor;

[0157] (2) Oxidation of organic phosphorus

[0158] Heat the precipitated mother liquor obtained in step (1) to a temperature of 100° C., and then, under the condition of a pressure of 0.5 MPa, use an aerator sold by Hebei Shuangmeihua...

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Abstract

The invention relates to an acid soil conditioner and a preparation method thereof. The method comprises the steps of preparing a phosphate-containing solid substance by means of glyphosate waste liquid, preparing a soil conditioner and performing granulation and drying. Compared with CK, the pH of tomato cell soil using the acid soil conditioner is improved by 0.53; in the aspect of nematode resistance, the tomato meloidogyne morbidity level of a cell using the acid soil conditioner is reduced to 1.24 from 4.86, and the amount of nematodes living in the roots and remaining nematode eggs is also greatly reduced. In addition, the contents of cadmium, lead, total mercury and total arsenic in tomato fruits are reduced by 14.29%, 26.56%, 28.13% and 23.64% respectively. The resource sustainable utilization of high-pollution glyphosate production wastewater is achieved, the pH of acid soil is improved and is controlled at a low level according to the number of the nematodes, and the capacity of absorbing harmful heavy metal ions by plants is reduced.

Description

【Technical field】 [0001] The invention belongs to the technical field of soil improvement. More specifically, the present invention relates to an acidic soil conditioner, and also relates to a preparation method of the soil conditioner. 【Background technique】 [0002] Acidic soil is the general term for soil with a pH value less than 7. According to the report of Professor Zhang Fusuo from the School of Resources and Environment of China Agricultural University, at present, 40% of the cultivated land in my country has a soil pH below 6.5, of which 1.8% have a pH below 4.5, and 15.85% have a pH between 4.5 and 5.5. There are 22.7% between 5.5 and 6.5, the form of soil acidification of cultivated land is not optimistic. Soil acidification is not only a change in soil pH, but also usually destroys the soil aggregate structure, causes compaction, reduces soil air permeability and microbial activity; moreover, the content of aluminum ions, iron ions, and manganese ions increases...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09K17/40B09C1/08A01N63/04A01N25/12A01P5/00A01P7/04A01P21/00C09K101/00C09K109/00A01N57/32A01N61/00
Inventor 蔡典雄李勇刘卫伟刘小光王新星
Owner JIANGSU GOOD HARVEST WEIEN AGROCHEM
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