Preparation method of magnetic ferric oxide/bagasse active carbon

A technology of magnetic iron oxide and activated carbon, which is applied in chemical instruments and methods, alkali metal oxides/hydroxides, inorganic chemistry, etc., can solve the problems of limited arsenic adsorption effect, reduce production costs, and achieve simple and easy process. The effect of improving performance indicators

Active Publication Date: 2015-09-09
GUILIN UNIVERSITY OF TECHNOLOGY
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Problems solved by technology

Bagasse activated carbon is an excellent adsorbent, but its adsorption effect on arsenic is limited

Method used

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  • Preparation method of magnetic ferric oxide/bagasse active carbon

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Experimental program
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Embodiment

[0016] (1) Put the bagasse that has been fully washed out of sugar in an oven at 85°C to dry, crush it with a universal crusher, and pass it through a 20-mesh standard sieve for later use.

[0017] (2) Add 1000 mL of ferrous sulfate solution with a concentration of 0.10 mol / L to a 2L wide-mouth reagent bottle with a frosted mouth, add 50 grams of bagasse obtained in step (1), stir evenly with a machine, and oscillate with ultrasonic waves for 30 minutes , let stand for 48 hours.

[0018] (3) Slowly add 10% by volume ammonia solution to the product of step (2) under mechanical stirring at a constant speed to adjust its pH value to 8.5, heat the product to 85°C with a microwave oven, and filter.

[0019] (4) Wash the filter cake obtained in step (3) with ultrapure water until the pH value of the washing solution is 7.0, then put the filter cake into a beaker containing 200 mL of analytically pure absolute ethanol, and place the beaker in an ultrasonic instrument Ultrasonic osci...

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Abstract

The invention discloses a preparation method of magnetic ferric oxide/bagasse active carbon. The preparation method comprises the following steps: adding 10-60g of bagasse into 1000mL of 0.05-0.5mol/L ferrous sulfate, stirring at constant speed, carrying out ultrasonic oscillation for 30-60 minutes, and standing for 24-48 hours; slowly adding an ammonia water solution with the volume ratio being 1%-10% by using a full-automatic titrator to adjust the pH value to 8.0-8.5, heating to 85 DEG C by using a microwave oven, filtering, washing with ultrapure water, enabling the pH value of a washing liquid to 7.0, putting a filter cake in a beaker containing 200mL of analytical absolute alcohol, putting the beaker in an ultrasonic instrument for carrying out ultrasonic oscillation for 30 minutes and filtering; drying for 16-24 hours at the temperature of 105-110 DEG C to obtain bagasse/ferric hydroxide and ferrous hydroxide mixture; and carrying out carbonization at the temperature of 450-550 DEG C, cooling, grinding, and sieving by a 100-mesh sieve to obtain a magnetic ferric oxide/bagasse active carbon compound absorbent. The preparation method disclosed by the invention is simple in process and low in cost; and a prepared product can be widely applied in the procedure for deeply treating arsenic-containing waste water of industrial and mining enterprises.

Description

technical field [0001] The invention relates to a method for preparing magnetic iron oxide / bagasse activated carbon, in particular to a method for preparing magnetic iron oxide / bagasse activated carbon by using bagasse as a main material and using ferrous sulfate as a modifier. Background technique [0002] Arsenic is a metalloid element that exists in the natural environment and is harmful to the human body. It can cause harm to human health by affecting the growth of crops and entering the human body through the food chain. Toxicological research results show that arsenic can interact with some specific proteins in vivo to generate arsenic-protein conjugates. Arsenic can enter the human body through inhalation and diet, causing damage to the skin, digestion, nerves, respiration and immune system in varying degrees. The current methods for treating arsenic-containing wastewater mainly include chemical precipitation, electrocoagulation, adsorption, and membrane separation. ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J20/20B01J20/28B01J20/30C02F1/28C02F1/58
Inventor 梁美娜朱林王敦球朱义年唐沈李欢欢
Owner GUILIN UNIVERSITY OF TECHNOLOGY
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