Sepiolite-supported nanoscale zero-valent iron material and preparation process and application thereof

A nano-zero-valent iron and preparation technology, applied in other chemical processes, chemical instruments and methods, water/sludge/sewage treatment, etc., can solve cumbersome, time-consuming and other problems, and achieve increased reaction rate and short time-consuming , a high degree of mixing effect

Inactive Publication Date: 2018-06-22
FISHERY MACHINERY & INSTR RES INST CHINESE ACADEMY OF FISHERY SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Chinese Patent Application No. 201510150723.4 discloses a loaded nano-sized zero-valent iron particle and its preparation method. 3+ Modified sepiolite solution with reducing agent KBH 4 The aqueous solution reacts to obtain sepiolite-loaded nano-zero-valent iron materials. This material is based on the degradation of decabromodiphenyl ether in water. It takes too long to stir with a stirrer in step 1, which is relatively cumbersome

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0034] The preparation method of sepiolite loaded nanometer zero-valent iron material is carried out according to the following steps:

[0035] Step 1: At room temperature, fully mix sepiolite powder with an average particle size of 325 mesh and hydrochloric acid solution with a mass concentration of 15% at a solid-to-liquid mass ratio of 1:5 and continue to stir. After the bubbles come out completely, add glass Balls were heated to boiling with a microwave oven with a power of 800W and kept for 5 minutes, and then heated and reacted with a microwave oven with a power of 150W for 15 minutes, and then washed, dried, roasted and crushed to obtain modified sepiolite; wherein, the drying temperature was 105 ℃, the drying time is 12h; the calcination temperature is 320℃, and the calcination time is 4h.

[0036] In the second step, the above-mentioned modified sepiolite is formulated into a suspension, wherein the mass volume ratio of modified sepiolite powder to deionized water is ...

Embodiment 2

[0041] The preparation method of sepiolite loaded nanometer zero-valent iron material is carried out according to the following steps:

[0042] Step 1: At room temperature, mix sepiolite powder with an average particle size of 100 mesh and hydrochloric acid solution with a mass concentration of 10% at a solid-to-liquid mass ratio of 1:5 and continue to stir. After the bubbles come out completely, add glass Balls were heated to boiling with a microwave oven with a power of 600W and kept for 3 minutes, and then heated and reacted with a microwave oven with a power of 200W for 10 minutes, and then washed, dried, roasted and crushed to obtain modified sepiolite; wherein, the drying temperature was 110 ℃, the drying time is 12h; the calcination temperature is 300℃, and the calcination time is 5h.

[0043] In the second step, the above-mentioned modified sepiolite is formulated into a suspension, wherein the mass volume ratio of modified sepiolite powder to deionized water is 1:30; ...

Embodiment 3

[0048] The preparation method of sepiolite loaded nanometer zero-valent iron material is carried out according to the following steps:

[0049] Step 1: At room temperature, thoroughly mix sepiolite powder with an average particle size of 150 mesh and hydrochloric acid solution with a mass concentration of 11% at a solid-to-liquid mass ratio of 1.5:5 and continue stirring. After the bubbles come out completely, add glass Balls were heated to boiling with a microwave oven with a power of 700W and kept for 4 minutes, and then heated and reacted with a microwave oven with a power of 180W for 12 minutes, and then washed, dried, roasted and crushed to obtain modified sepiolite; wherein, the drying temperature was 108 ℃, the drying time is 16min; the calcination temperature is 310℃, and the calcination time is 4.5h.

[0050] In the second step, the above-mentioned modified sepiolite is formulated into a suspension, wherein the mass volume ratio of modified sepiolite powder to deioniz...

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Abstract

The invention discloses a preparation process and application of a sepiolite-supported nanoscale zero-valent iron material. Sepiolite powder is subjected to microwave heating reaction in hydrochloricacid solution, and is then washed, dried, roasted and ground, so that modified sepiolite is obtained, ferrous sulfate solid is then added to undergo impregnation and oscillation, and under the conditions of ultrasonic agitation and constant nitrogen injection, mixture sufficiently reacts with weakly alkaline NaBH4 solution, so that the sepiolite-supported nanoscale zero-valent iron material is obtained. The sepiolite-supported nanoscale zero-valent iron material not only can rapidly adsorb and remove heavy metals of Cu, Pb, Zn, Cr and As in aquaculture water, but also regulate the pH environment of water quality and meet the requirement of aquaculture water; moreover, reaction conditions are easy to meet, the raw materials are cheap and easy to obtain, consumed time is shorter and reactionis mild, and operation is convenient.

Description

technical field [0001] The invention belongs to the technical field of aquaculture water treatment, and in particular relates to a sepiolite-loaded nano-zero-valent iron material and its preparation process and application. Background technique [0002] With the development of fishery, the abuse of fish medicines, unreasonable feed and other reasons make the content of heavy metals in aquaculture waters higher and higher. Currently, heavy metal pollution in aquaculture has been reported to include Cu, Pb, Zn, Cr, As, etc. In the field of traditional aquaculture, people usually use chemical precipitation methods such as splashing quicklime to remove heavy metals in water. Hydroxide ions in lime can precipitate most of the heavy metal ions other than mercury, but this method has a slow settling speed. Due to the high moisture content of wastewater and the difficulty of recycling wastewater after treatment, it has been gradually abandoned by farmers. Nano-zero-valent iron, com...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J20/12B01J20/30C02F1/28C02F101/20
CPCB01J20/0229B01J20/12C02F1/281C02F2101/20C02F2103/007
Inventor 刘雪刘兴国曹娟曾先磊高美云魏布
Owner FISHERY MACHINERY & INSTR RES INST CHINESE ACADEMY OF FISHERY SCI
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