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Acid soil conditioner and preparation method thereof

A technology of acid soil and conditioner, applied in soil conditioning materials, chemical instruments and methods, other chemical processes, etc., can solve problems such as environmental pollution

Active Publication Date: 2015-11-18
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

[0100] Example 1: Production of acidic soil conditioner

[0101] The implementation steps of this embodiment are as follows:

[0102] A. Preparation of phosphate-containing solids from glyphosate production waste liquid

[0103] (1) Precipitation of heavy metal ions

[0104] 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;

[0105] (2) Organophosphorus oxidation

[0106] Heat the precipitated mother liquor obtained in step (1) to a temperature of 60° C., and then,...

Embodiment 2

[0119] Example 2: Production of acidic soil conditioner

[0120] The implementation steps of this embodiment are as follows:

[0121] A. Preparation of phosphate-containing solids from glyphosate production waste liquid

[0122] (1) Precipitation of heavy metal ions

[0123] 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;

[0124] (2) Organophosphorus oxidation

[0125] Heat the precipitated mother liquor obtained in step (1) to a ...

Embodiment 3

[0138] Example 3: Production of acidic soil conditioner

[0139] The implementation steps of this embodiment are as follows:

[0140] A. Preparation of phosphate-containing solids from glyphosate production waste liquid

[0141] (1) Precipitation of heavy metal ions

[0142] 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;

[0143] (2) Oxidation of organic phosphorus

[0144] 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 preparation method comprises the steps: preparing phosphate-containing solids from glyphosate waste liquid, preparing a soil conditioner, granulating, drying and the like. Compared with CK, the preparation method has the advantages that a pH value of rice area soil utilizing the acid soil conditioner is increased by more than 0.56 unit, and the yield of rice is improved by 4.4%; besides, the contents of cadmium, lead, total mercury and total arsenical in rice grains are respectively reduced by 56.28%, 61.48%, 52.17% and 32.50%. According to the acid soil conditioner and the preparation method thereof, the resource reutilization of high-acidity and high-pollution glyphosate wastewater is achieved, and the precious phosphate rock resource is saved; besides, the regulation on the pH value of the acid soil is achieved, and heavy metal ions in the soil are fixed, so that the absorption of plants to harmful ions 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. Generally, acidic soils in my country are mainly distributed in the south of the Yangtze River and Yunnan, Guizhou, Sichuan and other places. However, with the extensive and long-term use of chemical fertilizers in recent years, a large area of ​​farmland soil acidification has also appeared in northern China. Soil acidification usually destroys the structure of soil aggregates, causes compaction, reduces soil air permeability and microbial activity; moreover, the content of aluminum ions, iron ions, and manganese ions increases, which hinders the absorption and utilization of other metal mineral elements, causing toxicity; at the same time...

Claims

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Application Information

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IPC IPC(8): C09K17/40C01D3/14C01D3/04C09K109/00C09K101/00
Inventor 蔡典雄李勇刘小光刘卫伟王新星
Owner JIANGSU GOOD HARVEST WEIEN AGROCHEM
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