Preparation method and application of mesoporous hydroxyl-ferric oxide Cr (VI) adsorbent

A mesoporous hydroxyl and iron oxide technology, applied in chemical instruments and methods, adsorption water/sewage treatment, other chemical processes, etc., can solve the problems of low utilization rate of raw materials, difficult reaction conditions, cumbersome process, etc., and achieve fast adsorption rate. , the effect of cheap and easy-to-obtain raw materials and low process costs

Active Publication Date: 2018-01-16
SHANGHAI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, this method has serious defects such as adding a large amount of organic solvent, low utili

Method used

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  • Preparation method and application of mesoporous hydroxyl-ferric oxide Cr (VI) adsorbent
  • Preparation method and application of mesoporous hydroxyl-ferric oxide Cr (VI) adsorbent
  • Preparation method and application of mesoporous hydroxyl-ferric oxide Cr (VI) adsorbent

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Embodiment 1

[0026] In this embodiment, a method for preparing a mesoporous iron oxyhydroxide Cr(VI) adsorbent comprises the following steps:

[0027] a. Weigh 10.00g of Fe(NO 3 ) 3 , 5.00g of formamide, and 1.00g of P123, mixed in a beaker, then added 20ml of pure water, ultrasonically dissolved for more than 10min, so that Fe(NO 3 ) 3 , formamide and P123 were mixed and dissolved in pure water, and then transferred to a 100ml volumetric flask to obtain a mixed solution of 100ml;

[0028] b. Transfer the mixed solution prepared in the step a to a polytetrafluoroethylene hydrothermal kettle and seal it, place it in a heating box, and conduct a hydrothermal reaction at 150° C. for 5 hours, and generate a precipitated product in the reaction solution;

[0029] c. cooling the reaction solution obtained after the reaction in step b to room temperature, using a Buchner funnel to filter the reaction solution, retaining the precipitated product, and washing the precipitated product twice with ...

Embodiment 2

[0034] This embodiment is basically the same as Embodiment 1, especially in that:

[0035] In this embodiment, a method for preparing a mesoporous iron oxyhydroxide Cr(VI) adsorbent comprises the following steps:

[0036] a. Weigh 10.00g of Fe with an analytical balance 2 (SO 4 ) 3 , 2.00g of acetamide, and 5.00g of F127, mixed in a beaker, then added 20ml of pure water, ultrasonically dissolved for more than 10min, so that Fe 2 (SO 4 ) 3 , acetamide and F127 were mixed and dissolved in pure water, and then transferred to a 100ml volumetric flask to obtain a mixed solution of 100ml;

[0037] b. Transfer the mixed solution prepared in the step a to a polytetrafluoroethylene hydrothermal kettle and seal it, place it in a heating box, and conduct a hydrothermal reaction at 200° C. for 5 hours, and generate a precipitated product in the reaction solution;

[0038] c. cooling the reaction solution obtained after the reaction in step b to room temperature, using a Buchner funn...

Embodiment 3

[0043] This embodiment is basically the same as the previous embodiment, and the special features are:

[0044] In this embodiment, a method for preparing a mesoporous iron oxyhydroxide Cr(VI) adsorbent comprises the following steps:

[0045] a. Weigh 10.00g of FeCl with an analytical balance 3 , 2.00g of urea, and 5.00g of F108, mixed in a beaker, then added 20ml of pure water, ultrasonically dissolved for more than 10min, so that FeCl 3 , urea and F108 were mixed and dissolved in pure water, and then transferred to a 100ml volumetric flask to obtain a mixed solution of 100ml;

[0046] b. Transfer the mixed solution prepared in the step a to a polytetrafluoroethylene hydrothermal kettle and seal it, place it in a heating box, and conduct a hydrothermal reaction at 200° C. for 5 hours, and generate a precipitated product in the reaction solution;

[0047] c. cooling the reaction solution obtained after the reaction in step b to room temperature, using a Buchner funnel to fil...

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Abstract

The invention discloses a preparation method and an application of a mesoporous hydroxyl-ferric oxide Cr (VI) adsorbent which can be used for solving the pollution problem of heavy metal Cr (VI) in water. The preparation method of the adsorbent comprises the steps as follows: inorganic iron salt, an amide precipitator and a mesoporous template agent are mixed and dissolved in pure water; the solution is subjected to a hydrothermal reaction after being sealed; a precipitate obtained after the reaction is filtered, washed and dried, and a precursor is obtained; the precursor is calcined and theadsorbent is obtained. The prepared efficient mesoporous hydroxyl-ferric oxide adsorbent has good adsorption capacity for Cr (VI), high saturation adsorption capacity, high adsorption rate and low equilibrium concentration. The raw materials used in the method are cheap, easy to obtain, green and environmentally friendly, the preparation method is simple and adopts mild conditions, and the prepared low-cost adsorbent which has excellent adsorptive performance for highly toxic pollutant Cr (VI) has important scientific significance and good application prospects.

Description

technical field [0001] The present invention relates to a preparation method and application of a Cr ion adsorbent, in particular to a preparation method and application of a highly toxic pollutant Cr(VI) ion adsorbent, which is applied to the preparation and application of chemical iron oxide and chromium Pollution treatment technology field. Background technique [0002] Heavy metal chromium pollution mainly comes from mining, electroplating, leather tanning and other industrial wastewater and landfill leachate. The valence states of chromium in the water environment are mainly Cr(III) and Cr(VI). The toxicity of different chromium compounds is different, and the toxicity of Cr(VI) is the most toxic, which is 100 times that of Cr(III). (VI) industrial wastewater can easily cause chromium pollution in surface water and groundwater, causing serious harm to the ecological environment. [0003] According to data from the Ministry of Environmental Protection, more than 10 mil...

Claims

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Application Information

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IPC IPC(8): B01J20/06B01J20/30C02F1/28C02F101/22
Inventor 马静罗晓雷王玉洁刘烨孙妍张金华
Owner SHANGHAI UNIV
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