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

Green preparation method and application of offshore polluted sediment remediation material

A technology for remediating materials and sediments, which is applied in the field of green preparation of remediation materials for offshore polluted sediments, and can solve the problem that the remediation materials are difficult to apply to in-situ remediation of marine sediments, limit the large-scale application of bio-enhancement technologies, and improve the biological effectiveness of heavy metals, etc. problem, to achieve the effect of improving bioremediation efficiency, low cost and high efficiency

Active Publication Date: 2021-03-02
DALIAN UNIV OF TECH
View PDF8 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] In the current sediment bioaugmentation restoration technology, the main problems are: the cost of co-metabolism substrates, biosurfactants and bacterial agents used is high; the in-situ applicability of adding exogenous bacterial agents is low; Conventional bioaugmentation remediation techniques often lead to increased bioavailability of heavy metals in sediments; and many of the remediation materials used are difficult to apply to in-situ remediation of marine sediments, which severely limits the application of bioaugmentation techniques in the remediation of marine polluted sediments large-scale application of

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
  • Green preparation method and application of offshore polluted sediment remediation material

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] (1) Preparation of seaweed extract

[0025] Collect offshore kelp, remove surface sediment, chop it and mix it with water at a mass ratio of 1:40, place it in a reactor, control the temperature at 120°C, and react for 150 minutes. After the liquid is separated, the precipitate is recovered, and the liquid phase is diluted 5 times with water, which is the seaweed extract;

[0026] (2) Green preparation of magnetic composite materials

[0027] Add the above-mentioned seaweed extract into the reactor, control its volume to be half of the reactor, add FeSO 4 ·7H 2 O, controls Fe 2+ The concentration is 0.05mol / L, and the reactor is sealed; then stirred at 800r / min for 20min, and the pH is controlled to be 10 during the stirring process; after the solid-liquid separation of the obtained suspension, the precipitate is washed twice with water and dried in vacuum to obtain a magnetic composite material ;

[0028] (3) Remediation of polluted sediments

[0029] Total petrol...

Embodiment 2

[0031] (1) Preparation of seaweed extract

[0032] Collect offshore kelp, remove surface sediment, chop it and mix it with water at a mass ratio of 1:50, place it in a reactor, control the temperature at 130°C, and react for 120 minutes. Cool to room temperature, and the mixed solution in the reactor is solidified After the liquid is separated, the precipitate is recovered, and the liquid phase is diluted 5 times with water, which is the seaweed extract;

[0033] (2) Green preparation of magnetic composite materials

[0034] Add the above-mentioned seaweed extract into the reactor, control its volume to be half of the reactor, add FeSO 4 ·7H 2 O, controls Fe 2+ The concentration is 0.06mol / L, and the reactor is closed; then stirred at 1000r / min for 15 minutes, and the pH is controlled to be 10 during the stirring process; after the solid-liquid separation of the obtained suspension, the precipitate is washed twice with water and dried in vacuum to obtain a magnetic 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

No PUM Login to View More

Abstract

The invention provides a green preparation method and application of an offshore polluted sediment remediation material, which belong to the technical field of environmental remediation. A seaweed extracting solution is used as a reaction material and a stabilizer, a composite material containing seaweed organic matter and magnetic iron oxide is prepared in a green mode, and then the composite material is applied to offshore polluted sediments so as to strengthen the indigenous microorganism degradation function and heavy metal stabilization, and the polluted sediments are efficiently repairedunder natural conditions. The method has the effects and benefits that the remediation material is simple in preparation process and low in cost, can generate a magnetic biological effect, slowly releases various seaweed organic matters and can reduce the bioavailability of heavy metals, so that the remediation efficiency of polluted sediments is improved, the method can effectively overcome thetechnical bottle diameter that a conventional biological enhancement technology is difficult to be applied to in-situ remediation of marine polluted sediments on a large scale, and has a wide application prospect in remediation of marine sediments and coastal wetlands with organic pollution, heavy metal pollution and combined pollution of the organic pollution and the heavy metal pollution.

Description

technical field [0001] The invention belongs to the technical field of environmental restoration, and relates to a green preparation method and application of offshore polluted sediment restoration materials. Background technique [0002] With the rapid development of coastal industrialization and urbanization, pollutants discharged into the sea (such as petroleum hydrocarbons, heavy metals, etc.) have increased sharply, resulting in the continuous destruction of the ecological environment of offshore sediments, which seriously threatens the biogeochemical cycle of the marine ecosystem and its healthy growth. [0003] At present, the remediation technologies of water polluted sediments mainly include physical, chemical and biological methods. For physical restoration techniques (such as covering method, dredging method, etc.), the cost is high, and it has a great impact on the benthos community and its functions. In chemical repair (such as chemical oxidation, rinsing, etc...

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 Applications(China)
IPC IPC(8): C02F1/62C02F101/20C02F103/08
CPCC02F1/62C02F2103/08C02F2101/20
Inventor 王竞蔡迎雪昝帅君
Owner DALIAN UNIV OF 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