Micro-nano iron sulfide/porous carbon composite material, preparation method thereof and seaweed biomass application

A composite material, iron sulfide technology, applied in the direction of iron sulfide, application, fertilizer mixture, etc., to achieve the effect of low cost, guaranteed operability and safety, and stable properties

Active Publication Date: 2016-12-07
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 use of algae biomass to promote the growth of sulfuric acid bacteria to synthesize biological micro-nano-iron sulfide materials, and then to prepare seaweed porous carbon-based micro-nano-iron sulfide composites through a hydrothermal reaction carbonization process

Method used

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  • Micro-nano iron sulfide/porous carbon composite material, preparation method thereof and seaweed biomass application

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] During the outbreak of green tide, the green tide alga Enteromorpha was salvaged in the coastal waters of Qingdao or the accumulated Enteromorpha was collected and crushed until the biomass particle size was 1×10 7 MPN / g) and ferrous sulfate were added to the above-mentioned seaweed slurry according to the ratio of 1% (mass ratio), homogenized and mixed, and the sulfate bioreduction reaction in the homogenized slurry was started at a temperature of 35 ° C. After 72 hours of reaction, sulfide The iron / seaweed biomass mixture was directly put into the hydrothermal reactor, and subjected to a rapid hydrothermal reaction at 170°C for 24 hours. After the hydrothermal reaction was completed, the black solid remaining at the bottom of the reactor was collected, dried in vacuum, and analyzed by scanning electron microscopy. The iron sulfide particles on the surface are micro-nano particles, so that the micro-nano iron sulfide / seaweed-based biochar composite material is prepared....

Embodiment 2

[0029] Collect the dried Gracilaria and asparagus, wash the seaweed to remove the salt, then crush the biomass to a particle size of 1×10 7 MPN / g) and ferrous sulfate are added to the seaweed slurry according to the ratio of 2% (mass ratio), homogenized and mixed, and the sulfate bioreduction reaction is started at a temperature of 25 ° C. After 120 hours of reaction, micronano iron sulfide / seaweed raw materials are generated. mixture of substances. The generated iron sulfide / seaweed biomass mixture was directly put into the hydrothermal reaction kettle, and the rapid hydrothermal reaction was carried out at 190°C for 10 hours. The black solid remaining at the bottom of the reaction kettle was collected and freeze-dried. The iron sulfide loaded on the porous carbon was observed by scanning electron microscope The particles are micro-nano particles, and the micro-nano iron sulfide / seaweed-based biochar composite material is prepared. The average particle size of the prepared p...

Embodiment 3

[0031] Collect kelp processing waste in a kelp processing factory, wash the kelp processing waste, remove the salt, then crush the kelp processing waste to a particle size of 1×10 7 MPN / g) and ferrous sulfate are added to the seaweed pulp in a ratio of 5% (mass ratio), homogenized and mixed, and the sulfate bioreduction reaction is started at a temperature of 15°C, and the iron sulfide / seaweed biomass mixture is generated after 240 hours of reaction . Put the mixture directly into the hydrothermal reaction kettle, and perform a rapid hydrothermal reaction at 220°C for 2 hours. After the hydrothermal reaction is over, collect the black solid remaining at the bottom of the reaction kettle and dry it in vacuum. The iron sulfide loaded on the porous carbon is observed by scanning electron microscope. The particles are micro-nano particles, that is, the micro-nano iron sulfide / seaweed-based biochar composite material is prepared. The average particle size of the prepared porous c...

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Abstract

The invention relates to a method in the technical field of environment protection, in particular to a micro-nano iron sulfide / porous carbon composite material, a preparation method thereof and seaweed biomass application. The preparation method includes: utilizing seaweed biomass to promote sulfate bio-reduction to generate iron sulfide to cover the surface of the seaweed biomass; carbonizing the seaweed biomass through mild hydrothermal reaction to generate a porous carbon material loaded with micro-nano biological iron sulfide. Various technical problems in the face of high-value utilization of the seaweed biomass can be effectively solved, early investment infrastructure expense is low, and a reactor can be quickly and emergently set up according to harvesting places and centralized harvesting and salving time of seaweed to prepare the micro-nano iron sulfide / porous carbon composite material. The micro-nano iron sulfide / porous carbon composite material prepared by the method can be applied in water pollution control, soil (sediment) improvement or polluted environment restoration.

Description

technical field [0001] The invention relates to a method in the technical field of environmental protection, in particular to a micronano iron sulfide / porous carbon composite material and its preparation and application of seaweed biomass. Background technique [0002] my country's seaweed biomass resources are very rich, and the seaweed production ranks first in the world, but the domestic use of seaweed is very little. Taking kelp as an example, the annual output of kelp accounts for about 95% of the world's output. Seaweed biomass has advantages over terrestrial biomass. Seaweed grows in the sea, does not occupy land resources, grows fast, captures a large amount of carbon dioxide during the growth process, and absorbs and removes a large amount of nitrogen and phosphorus. Green tide is an algal bloom phenomenon formed by the explosive growth and accumulation of marine macroalgae. Green tide algae drift to nearshore waters or accumulate on the beach, and will quickly r...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F1/58C02F1/62C09K17/04C01G49/12
CPCC01G49/12C01P2004/03C01P2004/61C02F1/58C02F1/62C09K17/04
Inventor 吕剑武君骆永明
Owner YANTAI INST OF COASTAL ZONE RES CHINESE ACAD OF SCI
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