Saline-alkali soil lead and cadmium heavy metal ion remover and preparation method thereof

A technology of heavy metal ions and saline-alkali land, applied in soil conditioning materials, chemical instruments and methods, and other chemical processes, can solve serious problems such as reducing metal mobility, destroying proteins, cell membranes, and DNA, and improving air permeability and water permeability. Long acting time and increased selectivity

Inactive Publication Date: 2020-08-07
WEIFANG YOURONG IND
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Alkaline substances (such as limestone, fly ash) can passivate the heavy metal pollutants in the soil to a certain extent in the short term by increasing the soil pH and transforming heavy metals into hydroxides or carbonates. The effect is unstable, and when the soil environment changes (such as acid rain, high temperature, fertilization), the passivated heavy metals are easily released into the soil again
Adsorption and exchange materials (zeolite, sepiolite) have small particles, large specific surface, strong adsorption capacity and ion exchange capacity, and fix heavy metal ions on the surface by adsorption or ion exchange, thereby reducing the mobility of heavy metals; heavy metals Reactive substances (soluble phosphate, NaS) react with heavy metal ions to form slightly soluble or insoluble compounds by introducing groups that can react with heavy metal ions, thereby reducing the mobility of metals. However, most of the currently used carriers are harmful to soil. Larger disturbances can easily cause problems such as soi

Method used

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  • Saline-alkali soil lead and cadmium heavy metal ion remover and preparation method thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0025] A lead and cadmium heavy metal ion remover for saline-alkali soil, comprising the following raw material components in parts by weight: 25 parts of mineral humus ultrafine powder, 20 parts of mesoporous silicon dioxide, 25 parts of shale, 10 parts of citric acid, and cyanobacteria Liquid 4 parts.

[0026] The particle size of the ultrafine powder of the mineral source humus is 1-20 μm.

[0027] The pore diameter of the mesoporous silica is 30-50 nm.

[0028] The shale is black shale.

Embodiment 2

[0030] The preparation method of saline-alkali land soil lead, cadmium heavy metal ion remover of embodiment 1, concrete steps are as follows:

[0031] A: Mineral source humus is crushed by a grinder at normal temperature and pressure, and then adjusted by an airflow classifier to obtain mineral source humus superfine powder with a particle size of 1-20 μm;

[0032] B: The shale is pulverized by a pulverizer and then passed through a 750-mesh sieve to obtain shale powder;

[0033] C: Melt citric acid at 100-110°C to obtain citric acid melt;

[0034] D: Spray citric acid melt evenly on the surface of mesoporous silica to obtain coated particles;

[0035] E: Stir and mix the mineral source humus superfine powder, shale powder, and coated particles to obtain a solid raw material;

[0036] F: Weigh 15g MgSO4 7H2O, 20.6g KCl, 31g NaNO3 and 418g NaCl in a clean Erlenmeyer flask, add 300ml distilled water to dissolve, add 100g Tris-HCl, 38.9mg FeCl3 6H 2 O, 15g EDTA Na 2 ,2.86gH ...

Embodiment 3

[0039] A lead and cadmium heavy metal ion remover for saline-alkali soil, comprising the following raw material components in parts by weight: 28 parts of mineral humus ultrafine powder, 28 parts of mesoporous silicon dioxide, 26 parts of shale, 12 parts of citric acid, and cyanobacteria Liquid 5 parts.

[0040] The particle size of the ultrafine powder of the mineral source humus is 1-20 μm.

[0041] The pore diameter of the mesoporous silica is 30-50 nm.

[0042] The shale is black shale.

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Abstract

The invention discloses a saline-alkali soil lead and cadmium heavy metal ion remover and a preparation method thereof. The remover comprises the following raw material components in parts by weight:25 to 35 parts of mineral source humus ultrafine powder; 20 to 35 parts of mesoporous silica; 25-30 parts of shale, 10-15 parts of citric acid, and 4-8 parts of cyanobacteria liquid; the citric acid in the soil desalting agent can improve the alkaline environment of soil; the mesoporous silica is matched with mineral source humus ultrafine powder, so various heavy metal ions can be strongly adsorbed in a short time, and the landform of saline-alkali soil is improved; the cyanobacteria can effectively treat the heavy metal ions in the soil for a long time, and the heavy metal ions in the soil are continuously and efficiently removed through the matching effect of the mesoporous silica and the cyanobacteria.

Description

technical field [0001] The invention relates to the technical field of saline-alkali soil improvement, in particular to a saline-alkali soil lead and cadmium heavy metal ion remover and a preparation method thereof. Background technique [0002] Coastal saline-alkali land is mainly formed due to the impact of seawater, soil transpiration, land reclamation projects, deforestation, and salt production from surrounding lakes. Its characteristics are mainly reflected in factors such as high soil salinity, high groundwater level, and low natural desalination rate of soil. Freshwater resources are scarce, hydrology has diurnal and seasonal changes, vegetation species diversity and quantity are poor, native tree species and saline-alkali-resistant tree species grow slowly, and cannot quickly form forests. In terms of climate, the ecological environment is easily affected by typhoons, sea tides, salt dust, and salt spray. [0003] For heavy metal-contaminated soil, the commonly us...

Claims

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Application Information

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IPC IPC(8): C09K17/40C05G3/80C09K101/00C09K109/00
CPCC05D9/00C09K17/40C09K2101/00C09K2109/00C05G3/80C05F11/00C05F11/08
Inventor 王胜齐志国李炳文高悦文
Owner WEIFANG YOURONG IND
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