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Arsenic-cadmium-lead composite polluted farmland multifunctional restoration material and application method thereof

A repairing material and composite pollution technology, applied in fertilization methods, restoration of polluted soil, soil conditioning materials, etc., can solve the problems of excess and reduction of heavy metals in crops, improve the stabilization effect, reduce the content of arsenic, cadmium and lead, and improve The effect of crop product quality

Inactive Publication Date: 2020-02-21
HEBEI YUHUAN ENVIRONMENTAL PROTECTION TECH CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] In view of the above existing problems, the object of the present invention is to provide a multi-functional restoration material for arsenic, cadmium and lead-contaminated farmland and its application method, to solve the problem of excessive heavy metals in farmland and crops polluted by arsenic, cadmium and lead, and effectively reduce the amount of arsenic, arsenic, and The content of cadmium and lead makes it lower than the national standard food pollutant limit

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] This embodiment provides a multifunctional restoration material for arsenic, cadmium and lead compound polluted farmland. The restoration material includes a foliar spraying agent and a soil passivator: the foliar spraying agent is fertilizer control SP, and the soil passivation agent is Passivating agents include iron-based passivating agents and alkali-based passivating agents.

[0023] The weight ratio of the iron-based passivator to the alkali-based passivator is 2:3. The iron-based passivator is based on magnetite powder, which is composed of 2 parts of magnetite powder, 2 parts of humus, and 2 parts of plant ash; the alkali-based passivator is a mixture of carbide slag and fly ash As the matrix, it is made by mixing 2 parts of calcium carbide slag, 1 part of fly ash, 1 part of bentonite and 1 part of humus.

[0024] The control fertilizer SP contains selenide, potassium metasilicate and potassium dihydrogen phosphate.

[0025] The experimental land was polluted ...

Embodiment 2

[0029] This embodiment provides a multifunctional restoration material for arsenic, cadmium and lead compound polluted farmland. The restoration material includes a foliar spray agent and a soil passivator: the foliar spray agent includes fertilizer control F and fertilizer control SP, The soil passivator includes iron-based passivator and alkali-based passivator.

[0030] The weight ratio of the iron-based passivator to the alkali-based passivator is 1:1. The iron-based passivator is based on hematite powder, which is mixed with 2 parts of hematite powder, 2 parts of humus, and 1 part of plant ash; the alkali-based passivator is made of a mixture of lime and fly ash. The matrix is ​​made by mixing 2 parts of lime, 1 part of fly ash, 2 parts of bentonite and 1 part of leaves.

[0031] The control fertilizer F contains ferric sulfate and ferrous sulfate, and the control fertilizer SP contains potassium metasilicate.

[0032] The experimental land was polluted with arsenic and...

Embodiment 3

[0036] This embodiment provides a multifunctional restoration material for arsenic, cadmium and lead compound polluted farmland. The restoration material includes a foliar spraying agent and a soil passivator: the foliar spraying agent is control fertilizer SP, soil passivation agent It is an alkali passivating agent.

[0037] The alkali-based passivator is based on a mixture of lime and steel slag, and is formed by mixing 2 parts of lime, 1 part of steel slag, 2 parts of humus and 1 part of bentonite.

[0038] The control fertilizer SP contains potassium selenide and potassium dihydrogen phosphate.

[0039]The experimental land was lead-cadmium compound polluted soil, and the lead-cadmium content in the eggplant grown without intervention exceeded the standard. Before planting, apply 5% alkaline passivator to the lead-cadmium composite polluted soil according to the soil quality, mix evenly, make the passivator fully contact with heavy metals, and improve the stabilization e...

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Abstract

The invention provides an arsenic-cadmium-lead composite polluted farmland multifunctional restoration material and an application method thereof. The restoration material comprises a foliar sprayingagent and a soil passivator, wherein the foliar spraying agent is a single controlled-release fertilizer SP or is composed of controlled-release fertilizer SP and a controlled-release fertilizer F; wherein the controlled-release fertilizer SP is a solution formed by mixing one or more of a selenide, potassium metasilicate and monopotassium phosphate and dissolving an obtained mixture in water, theselenide is any one of sodium selenide and potassium selenide, and the solution of the controlled-release fertilizer SP contains potassium ions; the controlled-release fertilizer F is a ferric salt or a solution formed by mixing the ferric salt and manganese sulfate n water, and the ferric salt is any one or a mixture of ferric sulfate and ferrous sulfate; and the soil passivator is an iron-basedpassivator and / or an alkali-based passivator. According to the types of pollutants in soil and agricultural products, the soil passivator and the foliar spraying agent are selected in a targeted manner, and a scientific application method is matched, so that the safety of the agricultural products can be effectively protected, and the yield and quality of the agricultural products are improved.

Description

technical field [0001] The invention belongs to the technical field of agricultural sprinkling irrigation and fertilization, and in particular relates to a multifunctional restoration material for arsenic, cadmium and lead compound polluted farmland and an application method thereof. Background technique [0002] Arsenic, a non-metallic element, mainly exists in the form of sulfides such as realgar (As 4 S 4 ), orpiment (As 2 S 3 ), arsenopyrite (FeAsS), etc. Arsenic compounds are also widely used in the manufacture of preservatives, dyes, pesticides, herbicides, insecticides and medicines. [0003] On October 27, 2017, the list of carcinogens published by the International Agency for Research on Cancer of the World Health Organization was initially compiled for reference. Arsenic and inorganic arsenic compounds were included in the list of carcinogens. On July 23, 2019, arsenic and arsenic compounds were included in the list of toxic and harmful water pollutants (the f...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C05G1/00C05G5/20C05D9/02C05D1/00C05G1/06C09K17/40A01C21/00B09C1/08C09K101/00
CPCA01C21/00B09C1/08B09C2101/00C05B7/00C05D1/00C05D9/02C09K17/40C09K2101/00
Inventor 刘星海赵保军刘俐佟雪娇雷健李玉会胡大海
Owner HEBEI YUHUAN ENVIRONMENTAL PROTECTION TECH CO LTD
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