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A kind of sulfur-doped algae-iron composite material and its preparation method and application

A technology of composite materials and sulfur doping, applied in chemical instruments and methods, other chemical processes, alkali metal compounds, etc., to achieve excellent performance, stable properties, and low cost

Active Publication Date: 2020-06-26
YANTAI INST OF COASTAL ZONE RES CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

So far, there has been no report on the preparation of algae-iron composites with algae-based charcoal as a dispersion carrier and sulfur doping

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0041] Preparation of sulfur-doped algae-iron composites:

[0042] 1) Add 0.1% (mass ratio) sodium lignosulfonate and 0.01% (mass ratio) ferric chloride to the green tide Enteromorpha salvaged from the No. 1 bathing beach in Qingdao and directly put it into the hydrothermal reaction kettle, Rapid hydrothermal reaction at 180°C for 24 hours, followed by filtration and drying to obtain seaweed-based biochar.

[0043] 2) Add the algae-based biochar obtained above into the deoxygenated ferrous chloride solution according to the dosage of 2wt%, control the mass ratio of iron to carbon to 1:1, and mix thoroughly for 2 hours under nitrogen atmosphere, slowly drop by drop Add 2 times the sodium borohydride solution containing sodium dithionite in the volume of ferrous solution, the molar concentration ratio of sodium borohydride and ferrous chloride in the mixed reaction system is 3:1, the molar ratio of ferrous chloride and sodium dithionite The concentration ratio is 10:1. After t...

Embodiment 2

[0046] Preparation of sulfur-doped algae-iron composites:

[0047] 1) Add 0.5% (mass ratio) calcium lignosulfonate and 0.05% (mass ratio) ferric chloride to the copper algae salvaged from the coastal waters of Weihai, put it into a hydrothermal reaction kettle, and heat it rapidly at 200°C After reacting for 12 hours, seaweed-based biochar was obtained after filtration and drying.

[0048]2) According to the mass ratio of 0.5%, the algae-based biochar obtained above is added to the deoxygenated ferrous chloride solution, and the iron-carbon mass ratio is controlled to be 10:1. After thorough mixing for 4 hours under nitrogen atmosphere, 2 volumes of potassium borohydride solution containing sodium dithionite was slowly added dropwise. The molar concentration ratio of potassium borohydride and ferrous iron in the mixed reaction system is 4:1, and the molar concentration ratio of ferrous and sodium dithionite is 20:1. After the dropwise addition, continue to stir and mix thoro...

Embodiment 3

[0052] 1) Add 1% (mass ratio) of magnesium lignosulfonate and 0.1% (mass ratio) of ferric sulfate to the fresh biomass of freshwater cultured chlorella, and then put it directly into the hydrothermal reaction kettle, and perform a rapid hydrothermal reaction at 210°C for 1 hours, the algae-based biochar was obtained after filtration and drying.

[0053] 2) According to the mass ratio of 5%, the algae-based biochar obtained above is added to the deoxygenated ferrous sulfate solution, and the mass ratio of iron to carbon is controlled to be 0.1:1. After thorough mixing under nitrogen atmosphere for 1 hour, 2 volumes of sodium borohydride solution containing sodium sulfide was slowly added dropwise. The molar concentration ratio of sodium borohydride and ferrous chloride in the mixed reaction system is 2:1, and the molar concentration ratio of ferrous and sodium sulfide is 100:1. After the dropwise addition, continue to stir and fully mix for 100 min, rinse with deoxygenated eth...

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Abstract

The invention relates to a method in the technical field of environmental protection, in particular to a sulfur-doped algae-iron composite material and its preparation method and application. Sulfur-doped algae-iron composites were obtained by reducing iron-modified algae-based charcoal under the action of iron and sulfur sources. The prepared sulfur-doped algae-iron composite material can be applied in water pollution control, soil (sediment) improvement or polluted environment remediation. The technical scheme of the present invention breaks through the limitation of unsatisfactory treatment effect due to the agglomeration of zero-valent iron or iron sulfide materials in the past, and can effectively overcome various technical problems faced by the high-value utilization of seaweed biomass. Quickly build reactors.

Description

technical field [0001] The invention relates to a method in the technical field of environmental protection, in particular to a sulfur-doped algae-iron composite material and its preparation method and application. Background technique [0002] my country's seaweed biomass resources are very rich, and seaweed production ranks first in the world. Algae are ecologically and economically important in aquatic systems, providing important ecosystem services. In addition, frequent outbreaks of green tides and red tides have been a major marine ecological disaster that has plagued coastal cities in recent years. Harmful algae float to the shore or waters or accumulate ashore, which will affect the coastal environment and may indirectly damage the intertidal ecosystem. Therefore, it is of great practical significance to make full use of our coastal seaweed biomass and harmful algae biomass. [0003] Zero-valent iron is a reducing agent with a large specific surface area and signif...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J20/20B01J20/28B01J20/30C02F1/28B09C1/00C02F101/20C02F101/30
CPCB01J20/20B01J20/28009B01J20/3085B01J2220/4843B09C1/00C02F1/283C02F2101/20C02F2101/30
Inventor 吕剑张翠武君骆永明
Owner YANTAI INST OF COASTAL ZONE RES CHINESE ACAD OF SCI
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