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Preparation method of Fe3O4-based magnetic shell charcoal novel adsorbent having magnetism

An adsorbent and magnetic technology, applied in the field of adsorption material preparation, can solve problems such as diseases and dysfunction, long-term persistence of toxic effects, human health hazards, etc., achieve good magnetic separation performance, low requirements for reaction conditions, and low cost Effect

Inactive Publication Date: 2017-03-29
EAST CHINA JIAOTONG UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0002] Heavy metal wastewater pollution has the characteristics of long-term persistence of toxic effects and non-biodegradable characteristics, and can enter the human body through the food chain and accumulate in the human body, leading to various diseases and functional disorders, and ultimately causing serious harm to human health

Method used

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  • Preparation method of Fe3O4-based magnetic shell charcoal novel adsorbent having magnetism
  • Preparation method of Fe3O4-based magnetic shell charcoal novel adsorbent having magnetism
  • Preparation method of Fe3O4-based magnetic shell charcoal novel adsorbent having magnetism

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Experimental program
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Embodiment 1

[0025] 1. Weigh 3~5g FeCl 3 ·6H 2 O and 1~2g FeCl 2 4H 2 O dissolved in the beaker, n(Fe 3+ ): n(Fe 2+ )=2:1, adding a certain amount of powdered ordinary shell carbon, m FeCl3·6H2O :m 普通壳炭 = 2:1, make it fully mixed, at 75°C, slowly add 40-60mL of sodium hydroxide aqueous solution dropwise as a precipitant while mechanically stirring, react for 1 hour, let the beaker stand for precipitation, and remove the supernatant ;

[0026] 2. Put the above remaining suspension into a vacuum drying oven at 60°C and dry to constant weight. Wash the obtained material repeatedly with distilled water until the supernatant is neutral. After magnetic recovery and drying, move it into a desiccator for storage.

[0027] Below through the ordinary shell carbon, Fe 3 o 4 Two kinds of adsorbents based on magnetic shell carbon were used to treat Cr(VI) wastewater with the same properties, and their adsorption effects were compared at the same time.

[0028] (1) Put 50mL of Cr(VI) wastewate...

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Abstract

According to the present invention, magnetic shell charcoal is prepared by using agricultural and forestry waste walnut shell as a main raw material, such that the problem that the existing active carbon adsorbent is difficult to recycle is solved; treated walnut shell charcoal powder is soaked with a ferric chloride and ferrous chloride mixing solution activator, and sodium hydroxide is adopted as a precipitant to prepare the novel adsorbent; and the conventional shell charcoal is magnetized in the present invention compared to the conventional shell charcoal, such that the adsorbent can quickly perform solid-liquid separation through the effect of the external magnetic field so as to eliminate centrifugation and other cumbersome steps.

Description

technical field [0001] The invention relates to a novel adsorbent for waste water treatment, belongs to the field of preparation of adsorbent materials, and in particular relates to an adsorbent preparation method for treating low-concentration heavy metal waste water. Background technique [0002] Heavy metal wastewater pollution has the characteristics of long-term persistence of toxic effects and non-biodegradable characteristics. It can enter the human body through the food chain and accumulate in the human body, leading to various diseases and dysfunction, and ultimately causing serious harm to human health. How to prepare a new type of adsorbent, which can not only rationally utilize resources, but also efficiently adsorb heavy metal ions in wastewater and realize the reuse of wastewater and the recycling of heavy metals, has important practical significance. [0003] Agricultural and forestry waste has many advantages such as wide sources, low price, short regeneratio...

Claims

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Application Information

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IPC IPC(8): B01J20/20B01J20/28B01J20/30C02F1/28C02F101/20
CPCB01J20/20B01J20/28009C02F1/283C02F2101/20C02F2303/16
Inventor 鲁秀国段建菊黄林长
Owner EAST CHINA JIAOTONG UNIVERSITY