Chicken manure derived charcoal-loaded nanometer zero-valent iron composite material as well as preparation method and application thereof

A technology of nano-zero-valent iron and composite materials, which is applied in chemical instruments and methods, water pollutants, alkali metal compounds, etc., can solve the problems of unprepared chicken manure-derived biochar loaded with nano-zero-valent iron, and achieve overcoming agglomeration Effects on sexual problems, environment friendly, and low price

Inactive Publication Date: 2021-06-29
FUZHOU UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

To the best of our knowledge, there is no report on the preparation of chicken manure-derived biochar loaded with nano-sized zero-valent iron (nZVI@CMBC)

Method used

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  • Chicken manure derived charcoal-loaded nanometer zero-valent iron composite material as well as preparation method and application thereof
  • Chicken manure derived charcoal-loaded nanometer zero-valent iron composite material as well as preparation method and application thereof
  • Chicken manure derived charcoal-loaded nanometer zero-valent iron composite material as well as preparation method and application thereof

Examples

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preparation example Construction

[0055] The present invention also provides a method for preparing a chicken manure-derived biochar-loaded nano-zero-valent iron composite material, comprising the following steps:

[0056] a) Under the protection of inert gas, conduct high-temperature pyrolysis of chicken manure in a tube furnace, remove impurities with acid solution after cooling, and dry after several times of cleaning to obtain chicken manure-derived biochar particles;

[0057] b) Mixing the chicken manure-derived biochar and ferrous salt solution in water evenly to obtain a chicken manure-derived biochar-ferrous salt mixed solution;

[0058] c) Under the protection of an inert gas, the mixed solution is subjected to a redox reaction with a reducing agent to obtain a chicken manure-derived biochar-loaded nano-zero-valent iron suspension;

[0059] d) The suspension is subjected to solid-liquid separation, and the black solid particles are washed, and dried to obtain nano zero-valent iron particles loaded wit...

Embodiment 1

[0083] A chicken manure-derived biochar-loaded nano-zero-valent iron composite material uses chicken-manure-derived biochar (CMBC) as a carrier, and supports nano-zero-valent iron particles on the surface and internal pores of CMBC. The preparation process includes the following steps:

[0084] (1) Preparation of chicken manure-derived biochar (CMBC)

[0085] After the fermented chicken manure was naturally dried, it was ground and sieved (100 mesh), and a certain amount of sieved chicken manure was weighed and placed in a tube furnace. Nitrogen was introduced for 30 minutes, and the temperature was raised to 600 °C at a rate of 10 °C / min. ℃ and kept for 2h (nitrogen protection throughout the pyrolysis process) to obtain carbonized black solid particles, after cooling to room temperature, use 0.5mol / L HCl solution to soak for 24h (the ratio of solid particles to HCl solution is 1g:100ml), and finally use The solid particles were washed with deionized water until the pH of the ...

Embodiment 2

[0103] Refer to Example 1 for the specific steps. The difference is that the dosage of chicken manure-derived biochar in the step (2) preparation of chicken manure-derived biochar-ferrous salt mixed solution is 0.1g, 0.25g, 1g and 2.5g respectively. g, that is, the mass ratio of nZVI to CMBC in the mixed solution is 1:0.2, 1:0.5, 1:2 and 1:5, respectively. The obtained chicken manure-derived biochar-loaded nano-ZVI particles were denoted as nZVI@0.2CMBC, nZVI@0.5CMBC, nZVI@2CMBC and nZVI@5CMBC, respectively.

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Abstract

The invention discloses chicken manure derived charcoal-loaded nanometer zero-valent iron particles, a preparation method of the particles and application of the particles to removal of Cr (VI) in water. The novel composite material of the chicken manure derived charcoal-loaded nanometer zero-valent iron particles comprises the chicken manure derived charcoal (CMBC) and nanometer zero-valent iron particles (nZVI) loaded on the surface of the CMBC and in pore channels of the CMBC. According to the invention, a liquid phase reduction method is adopted, CMBC is taken as a carrier, FeSO4. 7H2O is taken as ferrite, NaBH4 is taken as a reducing agent, and preparation is carried out under nitrogen protection; and the obtained material effectively inhibits easy agglomeration of nZVI, and the reaction activity of nZVI is greatly improved. The preparation and application of the composite material do not involve complex technological processes, and the composite material is wide in raw material source, low in cost and beneficial to popularization and application.

Description

technical field [0001] The invention belongs to the technical field of environmental restoration materials, and in particular relates to a chicken manure-derived biochar loaded with nanometer zero-valent iron particles, a preparation method thereof, and an application for removing Cr(VI) from water. Background technique [0002] With the development of human society, especially the industrialization of production activities, due to improper production storage or disposal, chromium ions enter water bodies and cause environmental pollution incidents. Chromium is a toxic heavy metal with applications in industries such as electroplating, metallurgy, leather and chromate manufacturing. In the natural environment, chromium mainly exists in two forms of Cr(Ⅲ) and Cr(Ⅵ), among which Cr(Ⅲ) is easy to exist in the form of stable complexes in natural water, while Cr(Ⅵ) has high toxicity. Soluble in water, difficult to precipitate, easy to migrate, often in the form of oxyanions (CrO ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J20/20B01J20/28B01J20/30C02F1/28C02F101/22
CPCB01J20/20B01J20/28009C02F1/283C02F2101/22B01J2220/4887
Inventor 方圣琼朱健泷汪凯
Owner FUZHOU UNIV
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