Unlock instant, AI-driven research and patent intelligence for your innovation.

A kind of remediation agent for heavy metal lead-arsenic compound polluted soil and preparation method thereof

A soil remediation agent and composite pollution technology, applied in the field of heavy metal lead arsenic composite polluted soil remediation agent and its preparation, can solve the problems of lack of material long-term ecological risk assessment research, high cost, secondary pollution and the like

Active Publication Date: 2021-12-24
HIGH & NEW TECH RES CENT OF HENAN ACAD OF SCI
View PDF0 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Most of the existing remediation technologies and materials focus on the remediation of heavy metal pollution in acidic soils, but are not suitable for the current situation of dry and alkaline soils in the north
Most restoration materials use industrial waste, metal oxides, etc. as raw materials, which can easily cause secondary pollution and damage the soil structure and planting function; some new functional materials have complex preparation processes and high costs, and lack of long-term ecological risk assessment for these materials Research

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • A kind of remediation agent for heavy metal lead-arsenic compound polluted soil and preparation method thereof
  • A kind of remediation agent for heavy metal lead-arsenic compound polluted soil and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] A remediation agent for heavy metal lead-arsenic composite polluted soil is composed of the following raw materials in parts by weight: 50 parts of modified fruit charcoal, and 50 parts of humic acid modified attapulgite materials.

[0031] The above-mentioned modified fruit charcoal is specifically prepared through the following steps:

[0032] Dry the fruit charcoal at 105°C, grind it, and sieve it through a 100-mesh sieve. 100g of fruit charcoal sieved through a 100 mesh sieve, 100ml of 68% concentrated nitric acid, 300ml of 98% concentrated sulfuric acid were fully mixed, allowed to stand and cooled. Sonicate the cooled solid-liquid mixture at room temperature for 3.5 hours, centrifuge and filter to remove the acid solution in the upper layer, take the solid residue and wash it with deionized water until it is neutral (that is, wash the solid residue repeatedly with deionized water until the washing liquid is neutral. sex). Dry the solid material obtained from the...

Embodiment 2

[0043] A heavy metal lead-arsenic compound polluted soil remediation agent is composed of the following raw materials in parts by weight: 45 parts of modified straw charcoal, and 55 parts of humic acid modified attapulgite material.

[0044] The above-mentioned modified straw charcoal is specifically prepared through the following steps:

[0045] The straw charcoal was dried at 105°C, ground, and sieved through a 100-mesh sieve. 100g of straw charcoal sieved through a 100-mesh sieve, 100ml of 68% concentrated nitric acid, and 300ml of 98% concentrated sulfuric acid were fully mixed, allowed to stand and cooled. Sonicate the cooled solid-liquid mixture at room temperature for 5.0 hours, centrifuge and filter to remove the acid solution in the upper layer, and wash the solid residue with deionized water until it is neutral (that is, repeatedly wash the solid residue with deionized water until the washing liquid is neutral. sex). The solid material obtained by the above washing...

Embodiment 3

[0055] A heavy metal lead-arsenic compound polluted soil remediation agent is composed of the following raw materials in parts by weight: 75 parts of modified straw charcoal, and 25 parts of humic acid modified attapulgite material.

[0056] The above-mentioned modified straw charcoal is specifically prepared through the following steps:

[0057] The straw charcoal was dried at 105°C, ground, and sieved through a 100-mesh sieve. 100g of straw charcoal sieved through a 100-mesh sieve, 100ml of 68% concentrated nitric acid, and 300ml of 98% concentrated sulfuric acid were fully mixed, allowed to stand and cooled. Sonicate the cooled solid-liquid mixture at room temperature for 2.0 hours, centrifuge and filter to remove the acid solution in the upper layer, and wash the solid residue with deionized water until neutral (that is, repeatedly wash the solid residue with deionized water until the washing liquid is neutral. sex). The solid material obtained by the above washing is dr...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

PropertyMeasurementUnit
specific surface areaaaaaaaaaaa
specific surface areaaaaaaaaaaa
specific surface areaaaaaaaaaaa
Login to View More

Abstract

The invention discloses a heavy metal lead-arsenic compound polluted soil remediation agent, which is characterized in that it comprises the following raw materials in weight percentage: 30-75% modified carbon material, 25-70% humic acid modified attapulgite material. The soil remediation agent can efficiently adsorb lead and arsenic in soil without significantly changing soil properties and farming conditions. After three months of curing, the repair agent can reduce the content of effective lead and arsenic in the soil by about 40-70%, and the content of arsenic and lead absorbed in sensitive crops can be reduced by 44-84%. Up to 3 years or more. At the same time, the material has the characteristics of low cost, simple preparation process, no secondary pollution, quick effect, and easy large-scale promotion. It can be widely used in the remediation of agricultural land soil contaminated by lead and arsenic.

Description

technical field [0001] The invention belongs to the technical field of remediation of heavy metal polluted soil in environmental protection, and in particular relates to a remediation agent for heavy metal lead and arsenic composite polluted soil, a preparation method and a use method thereof. Background technique [0002] my country's cultivated land soil pollutants exceed the standard rate as high as 19.4%, of which more than 80% are heavy metal pollution. When the heavy metals in the soil exceed a certain level, the soil's self-purification and recovery ability will be lost, and the soil quality will decline, which will not only seriously deteriorate the quality of the ecological environment, but also cause harm to human health through the food chain. [0003] There are two main methods for the remediation of heavy metal pollution in farmland soil; one is to change the existing form of heavy metals in polluted soil, and convert them from an active state to a stable state,...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Patents(China)
IPC IPC(8): C09K17/40B09C1/08C09K101/00
CPCC09K17/40B09C1/08B09C2101/00C09K2101/00
Inventor 刘珂珂董学亮王俊伟李中贤刘小培肖进彬郑果刘清余学军
Owner HIGH & NEW TECH RES CENT OF HENAN ACAD OF SCI