Looking for breakthrough ideas for innovation challenges? Try Patsnap Eureka!

A kind of sulfur-doped nano ferric oxide/biochar composite material and its preparation method and application

A technology of ferroferric oxide and composite materials, which is applied in the field of sulfur-doped nanometer ferroferric oxide/biochar composite materials and its preparation and application, and can solve problems such as difficult to achieve soil remediation goals and inability to solve remediation problems, and achieve Maintains magnetic separation characteristics, efficiently adsorbs heavy metals, and is inexpensive

Active Publication Date: 2021-10-29
EAST CHINA UNIV OF SCI & TECH
View PDF18 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0018] At present, nano-iron / biochar composite materials are widely used in the removal of heavy metal pollution in water and some organic pollutants and have achieved good results. However, there are relatively few reports on the application of this material to the remediation of heavy metal pollution in soil.
Although the above-mentioned methods can realize the simultaneous remediation of one or more heavy metal pollution in soil, most of them are aimed at the remediation of cationic metals, and it is difficult to achieve soil remediation for soils polluted by anionic metals or contaminated soils with both anionic and cationic metals. target, there are still some deficiencies, which cannot solve the practical repair problems in engineering applications

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 sulfur-doped nano ferric oxide/biochar composite material and its preparation method and application
  • A kind of sulfur-doped nano ferric oxide/biochar composite material and its preparation method and application

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0040] Embodiment 1: Preparation of sulfur-doped nano-ferric oxide / biochar composite material

[0041] Step 1: Wash the mung bean shell, the raw material of biomass, dry at 80° C. for 48 hours, and pass through a 10-mesh sieve after crushing. The processed mung bean shell raw material is put into a tube furnace, and oxygen is isolated under the protection of nitrogen. The temperature rise program is set at 15°C / min to raise the temperature to 700°C, and it is pyrolyzed at 700°C for 2 hours under oxygen-limited conditions, and finally cooled to obtain biochar.

[0042] Step 2: Grind the biochar obtained above, pass through a 100-mesh sieve, and set aside.

[0043] Step 3: ultrasonically disperse 60mmol of thiourea, 20mmol of ferric nitrate nonahydrate and an appropriate amount of biochar in 50mL of n-butylamine for 30min, respectively. First, mix thiourea and ferric nitrate nonahydrate solution in a 250mL three-necked flask, and react the mixed solution at 60°C for 30min under...

Embodiment 2

[0045] Embodiment 2: Preparation of sulfur-doped nano-ferric oxide / biochar composite material

[0046] Step 1: Dry the raw material water hyacinth root powder at 80°C for 48 hours, put it into a tube furnace, set the heating program at 15°C / min to raise the temperature to 700°C, pyrolyze it at 700°C for 2 hours under oxygen-limited conditions, and finally cool down to obtain biochar .

[0047] Step 2: Grind the biochar obtained above, pass through a 100-mesh sieve, and set aside.

[0048] Step 3: ultrasonically disperse 60 mmol of thiourea, 20 mmol of ferric nitrate nonahydrate and an appropriate amount of biochar in 50 mL of n-butylamine for 30 min, respectively. First, mix thiourea and ferric nitrate nonahydrate solution in a 250mL three-necked flask, and react the mixed solution at 60°C for 30min under the protection of continuous stirring and inert gas. Then the biochar suspension was added, and the reaction was continued for 2 h. After removing the heat source and full...

Embodiment 3

[0050] Example 3: Determination of the removal performance of heavy metal arsenic and lead in soil by sulfur-doped nano-ferric oxide / biochar composite material

[0051] Soil remediation experiment (conducted in air environment): measure 10mL of deionized water and add it to an Erlenmeyer flask containing 2g of contaminated soil, shake well, then add 0.02g of the prepared sample, and shake in a water bath for 12h. Each sampling volume is 1ml, and after filtering through a 0.45 μm filter membrane, use an atomic absorption spectrophotometer and an atomic fluorescence spectrometer to measure the concentrations of Pb and As therein, and calculate the removal rate.

[0052] Figure 1a and Figure 1b Respectively, the sulfur-doped iron ferric oxide nanomaterials involved in Example 2 of the present invention remove arsenic and lead from soil. from Figure 1a and Figure 1b It can be seen that the removal rate of arsenic in soil to the sulfur-doped nano ferric oxide / biochar composit...

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
particle size (mesh)aaaaaaaaaa
Login to View More

Abstract

The invention discloses a sulfur-doped nano ferric oxide / biochar composite material, a preparation method thereof and an application thereof in remediation of heavy metal arsenic and / or lead polluted soil. Wherein, the composite material is loaded with sulfur-doped nano ferric oxide on the biochar carrier; the biomass raw materials used to prepare the biochar carrier include agricultural waste. The preparation process of the sulfur-doped nano-Fe3O4 / biochar composite material of the present invention combines solid loading and vulcanization modification at the same time, so that the material has high-efficiency adsorption performance, reduction performance and recovery potential, and can simultaneously efficiently remove the sulfur in the soil. Arsenic and lead contamination purposes. The present invention not only makes up for the limitation of simply using biochar and nano-iron materials, but also solves the problem that it is difficult to efficiently remove arsenic pollution in the form of anions and lead pollution in the form of cations in the actual soil remediation process. Application prospect.

Description

technical field [0001] The invention relates to the technical field of modification materials for heavy metal polluted soil in environmental protection, in particular to a sulfur-doped nano ferric oxide / biochar composite material and its preparation method and its application in remediation of heavy metal arsenic and / or lead polluted soil . Background technique [0002] According to the data of the National Soil Pollution Survey Bulletin released by the Ministry of Environmental Protection and the Ministry of Land and Resources of the People's Republic of China in 2014, the national soil environment situation is not optimistic, and soil pollution is serious. The total national soil exceeding rate is 16.1%. According to data from the Eco-Environmental Research Center of the Chinese Academy of Sciences, nearly 20 million hectares of soil in my country are currently polluted by heavy metals such as Pb, As, and Hg, accounting for about 20% of the total cultivated land area. Amo...

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): B01J20/20C09K17/00B01J20/30B09C1/00
CPCB01J20/20B09C1/00C09K17/04
Inventor 张卫王戈慧桑丽卞浩李倩楠季晓雯曹心德付融冰楼紫阳邱宇平
Owner EAST CHINA UNIV OF SCI & TECH
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Patsnap Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Patsnap Eureka Blog
Learn More
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic, Popular Technical Reports.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com