Biological adsorbent capable of removing fluorine and heavy metals in wastewater, preparation method and application method thereof

A biosorbent and heavy metal technology, applied in chemical instruments and methods, water pollutants, adsorbed water/sewage treatment, etc., can solve problems such as difficult simultaneous removal of fluorine and heavy metals, secondary pollution adsorption performance, complex preparation process, etc. , to achieve the effect of short cycle, mild experimental operating conditions and simple process

Active Publication Date: 2015-04-01
CENT SOUTH UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the currently commonly used adsorbents still have some shortcomings, such as complex preparation process, high cost, secondary pollution or poor adsorption performance, such as the adsorption capacity of fluoride ions is generally only 3-30 mg / L, and it is difficult to remove wastewater at the same time Fluorine and heavy metals in

Method used

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  • Biological adsorbent capable of removing fluorine and heavy metals in wastewater, preparation method and application method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] Weigh 200g of cleaned potatoes, peel and chop them, then add 1L of deionized water and boil for 30 minutes. Then filter with gauze to obtain the filtrate, add 0.5 g of magnesium sulfate, 1 g of sodium dihydrogen phosphate, and 20 g of glucose, add distilled water to make the volume to 1 L, and sterilize at 115° C. for 20 minutes to obtain a liquid medium for use. Collect the fungal spores of "Aspergillussp.F-1" cultivated on the plate, press 10 6 -10 7 The amount of inoculum per milliliter was inoculated into sterilized medium, and then placed on a shaker with a rotation speed of 175 rpm at 37°C for 3 days to obtain the desired bacterial solution for use. Take 10mL bacterial liquid and 10mL 0.1mol / LAl 2 (SO 4 ) 3 .6H 2 O was added to a flat-bottomed flask, the concentration of bacteria in the mixed solution was 8g / L, and the concentration of aluminum sulfate was 0.05mol / L. After stirring evenly, adjust the pH to about 5.5 with NaOH, then continuously stirred and so...

Embodiment 2

[0024] At room temperature, with 50 mg of the biosorbent prepared in Example 1, the initial pH of 100 mL was 4.5, and the fluoride ion concentration was 27.73 mg L -1 The solution undergoes adsorption reaction, wherein the reaction time is controlled at 5, 10, 20, 40, 60, 120, 240, 480, 720 min. After the reaction, the mixed solution was filtered and collected in a dry beaker, and the concentration of fluoride ions in the filtrate was determined by a fluoride ion selective electrode method. Table 1 shows the solution concentration and adsorption rate of fluoride ions under different reaction times.

[0025] Table 1

[0026]

Embodiment 3

[0028] Use 100mg of the biosorbent prepared in Example 1 to carry out adsorption reaction on 100mL solution with an initial pH of 6.0 and a fluoride ion concentration of 179.1 mg / L. After shaking the reaction for 720 minutes, the fluoride ion removal rate was 54.8%. The amount reaches 98.2mg / g.

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Abstract

The invention discloses a biological adsorbent capable of removing fluorine and heavy metals in wastewater, a preparation method and an application method. The preparation method of the biological adsorbent takes filamentous fungi as the raw material and comprises the following steps: preparing a liquid culture medium by using crops rich in sugar and starch, culturing at the constant temperature, simultaneously stirring and reacting the liquid culture medium with an aluminum sulfate liquid, filtering, washing and drying to prepare the biological adsorbent. The biological adsorbent is simple in preparation process, low in preparation cost, mild in experiment operating conditions and free of secondary pollution, is environment-friendly, is high in fluorine ion adsorption capacity being 98.2mg/g, and is capable of simultaneously, efficiently and quickly removing fluorine ions and heavy metal ions such as lead, zinc, copper, cadmium and the like in the wastewater.

Description

technical field [0001] The invention belongs to the technical field of microbial application and wastewater treatment, and relates to a biosorbent for treating fluorine-containing heavy metal wastewater and a preparation and application method thereof. It is suitable for the treatment of wastewater containing fluoride ions and heavy metals such as lead, zinc, copper and cadmium produced in non-ferrous metal smelting, aluminum processing and other processes. Background technique [0002] Fluorine-containing ore mining, non-ferrous metal smelting, electroplating, chemical industry and other industries often contain fluoride ions and various heavy metal ions in wastewater, causing serious environmental problems and threatening human health. [0003] At present, the commonly used methods for the treatment of fluorine-containing wastewater are chemical precipitation, coagulation precipitation, and adsorption. The chemical precipitation method generates CaF by adding calcium salt...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J20/22B01J20/30C02F1/28C02F1/62C02F1/58
CPCB01J20/22B01J20/3085B01J2220/4812C02F1/285C02F1/583C02F1/62C02F2101/14C02F2101/20
Inventor 杨卫春王海鹰唐琼芝柴立元杨志辉张理源
Owner CENT SOUTH UNIV
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