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Biochar for heavy metal adsorption and preparation method thereof
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A biochar and heavy metal technology, applied in chemical instruments and methods, adsorption water/sewage treatment, water pollutants, etc., can solve the problem of adsorption and fixation of heavy metals, and achieve the effect of increasing the adsorption and fixation capacity
Inactive Publication Date: 2020-08-14
INNER MONGOLIA UNIV FOR THE NATITIES
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Problems solved by technology
It shows that the modification of biochar can better improve the functional groups of biochar, but the existing biochar cannot adsorb and fix heavy metals well.
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Embodiment 1
[0015] An embodiment provided by the present invention: a biochar used for heavy metal adsorption, wherein the raw materials for the production of the biochar used for heavy metal adsorption are corn stalks, ferrous sulfate and potassium permanganate.
[0016] The present invention also provides a method for preparing biochar for heavy metal adsorption, comprising the following steps:
[0017] Step 1, weigh ferrous sulfate, potassium permanganate and biochar, put into crucible, add 50ml deionized water, put into sonicator and ultrasonically vibrate, convenient to fully modify;
[0018] Step 2, put the raw materials in step 1 into a centrifuge, separate for 5 minutes under the condition of 4000r / min, and discard the supernatant;
[0019] In step three, the sample in step two is placed in a muffle furnace at 400° C. for 4 hours;
[0020] Step 4: After the pyrolysis is completed and the sample is lowered to room temperature, the solid product is taken out, ground through a 40-me...
Embodiment 2
[0023] A biochar used for heavy metal adsorption, wherein the raw materials for the production of the biochar used for heavy metal adsorption are corn stalks, ferrous sulfate and potassium permanganate.
[0024] A preparation method for biochar for heavy metal adsorption, comprising the following steps:
[0025] Step 1, weigh ferrous sulfate, potassium permanganate and biochar, put them into a crucible, add 50ml of absolute ethanol, put them into an ultrasonicator, and ultrasonically oscillate for 30 minutes at 60°C to facilitate full modification;
[0027] Step 3, drying the raw materials in step 2 and putting them into a muffle furnace at 400°C for 4 hours;
[0028] Step 4: After the pyrolysis is completed and the sample is lowered to room temperature, the solid product is taken out, ground through a 40-mesh sieve, and bagged for later use.
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Abstract
The invention discloses biochar for heavy metal adsorption. The production raw materials of the biochar for heavy metal adsorption are corn straw, ferroussulfate and potassiumpermanganate, and the preparation method comprises the following steps: step 1, weighing ferroussulfate, potassiumpermanganate and biochar, putting into a crucible, adding 50ml of deionized water, putting into an ultrasonic device, and carrying out ultrasonic oscillation so as to facilitate full modification; step 2, putting the raw materials in the step 1 into a centrifuge, separating for 5 minutes under the condition of 4000r / min, and discarding the supernatant; step 3, putting the sample obtained in the step 2 in a muffle furnace at 400 DEG C for 4 hours; and step 4, after the pyrolysis is finished and the sample is cooled to the room temperature, taking out the solid product and grinding with a 40-mesh sieve and bagging for later use. The corn stalk carbon is used as a raw material, the biochar is modifiedby utilizing potassiumpermanganate and a ferroussulfate modifier, the biochar is subjected to modification treatment through secondary orthogonal rotation design, and the heavy metal adsorption andthe fixation capacity of the biochar is to be improved.
Description
technical field [0001] The invention relates to the field of products related to assessment methods, in particular to a biochar for heavy metal adsorption and a preparation method thereof. Background technique [0002] With the development of economy and society, heavy metal pollution has seriously threatened people's health, and has highlighted a serious impact on my country's sustainable development. Therefore, the control of environmental pollution has become a worldwide problem. Research on new governance methods is particularly important. Nowadays, with the advancement of science and technology, people have achieved great results in the restoration of heavy metal pollution, but the investment in the restoration process is expensive, the input-output ratio is poor, the restoration effect is not sustainable, and it is easy to repeat, which troubles the restoration of heavy metal contaminated areas. Biochar is A product of high-temperature pyrolysis of organic matter unde...
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