Preparation method of magnetic active carbon for removing methylene blue in water
A magnetic activated carbon, methylene blue technology, applied in chemical instruments and methods, water pollutants, water/sewage treatment, etc., can solve problems such as reduced magnetic properties, improve water purification capacity, simple preparation method, and avoid secondary pollution. Effect
Inactive Publication Date: 2017-07-14
CHENGDU UNIV OF INFORMATION TECH
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[0009] Research literature found that the magnetic core of the existing magnetic activated carbon mostly uses Fe 3 o 4 Magnetic nanoparticles, but due to Fe 3 o 4 Fe in 2+ In a metastable state, it is easy to lose another electron to become Fe 3+ Reach the most stable oxidation state, resulting in a decrease in magnetic properties; in order to improve the oxidation resistance, Fe can be partially replaced by manganese and zinc 2+ , that is, nano-manganese-zinc ferrite (molecular formula is Mn 1-x Zn x Fe 2 o 4 ) to prepare magnetic activated carbon for magnetic core
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[0024] A preparation method for magnetic activated carbon for removing methylene blue in water, comprising the following steps:
[0025] A. Preparation of magnetizer (M): Put 2.7g manganese zinc ferrite in a three-necked flask, add 0.6g sodium dodecyl sulfate (SA1) and 20ml water to it, then add 5 drops of 5mol / L NaOH solution ;Place the above mixture in a water bath at 92°C for 90 minutes; after the reaction, adjust the pH to 7.0 with 1mol / L hydrochloric acid; then collect the solid particles with a magnet, discard the rest, and wash the collected solid particles with hot water; Finally, 1 g of sodium tripolyphosphate (SA2) and 10 ml of water were respectively added thereto, mechanically stirred in a water bath at 92° C. for 90 min, and left to stand to obtain a magnetizer solution;
[0026] B. Pretreatment activated carbon (AC): put commercially available activated carbon in 0.02mol / L calcium chloride solution and stir at room temperature for 2 hours; adjust the pH to 2.0, a...
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The invention discloses a preparation method of magnetic active carbon for removing methylene blue in water. The preparation method comprises the following main steps: placing manganese zinc ferrite in a container, adding sodium dodecyl sulfate and water, adding a NaOH solution; reacting in a water bath kettle and then regulating pH; collecting solid particles and abandoning the rest of liquid, washing the solid particles with water; adding sodium tripolyphosphate and water, carrying out mechanical agitation in the water bath kettle, and standing to prepare a magnetic agent solution; placing active carbon into a calcium chloride solution and stirring at room temperature; regulating pH and drying in a drying box; magnetizing the active carbon by the use of a magnetic agent; and drying, washing and drying to prepare the magnetic active carbon. Through adsorption of the magnetic active carbon for reducing concentration of methylene blue in wastewater, water purification capability is remarkably enhanced. After the magnetic active carbon adsorbs methylene blue, solids and liquids can be separated rapidly and efficiently. Recycling efficiency is higher.
Description
technical field [0001] The invention relates to the technical field of activated carbon preparation, in particular to a method for preparing magnetic activated carbon for removing methylene blue in water. Background technique [0002] Adsorption technology is one of the simplest and most efficient methods to remove pollutants in water. Adsorption materials are the key and core of adsorption technology. How to prepare efficient adsorbents for environmental problems has always been a hot research topic at home and abroad. At present, as far as the research on environmental adsorption materials is concerned, the following issues deserve attention: [0003] (1) Cost of adsorbents: In practical applications, only adsorbents with high cost performance and simple preparation methods can be widely used. [0004] (2) The solid-liquid separation performance of the adsorbent after use: The solid-liquid separation of the adsorbent after use is difficult. If the adsorbent after use can ...
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IPC IPC(8): B01J20/20B01J20/28C02F1/28B01J20/30C02F101/30
CPCB01J20/06B01J20/20B01J20/28009C02F1/283C02F2101/308
Inventor 余静
Owner CHENGDU UNIV OF INFORMATION TECH