A kind of diesel adsorbent and preparation method thereof

A technology of adsorbent and diesel oil, which is applied in the field of diesel adsorbent and its preparation, can solve the problems of oil spill limitation, secondary pollution, and low recovery rate of biological methods, so as to reduce impact, save resources, enrich pores and contain oxygen The effect of functional groups

Active Publication Date: 2022-08-02
ZHEJIANG OCEAN UNIV
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  • Abstract
  • Description
  • Claims
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Problems solved by technology

However, chemical methods are easy to cause secondary pollution, while biological methods have a low remediation rate, which makes them very limited in cleaning up oil spills

Method used

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  • A kind of diesel adsorbent and preparation method thereof
  • A kind of diesel adsorbent and preparation method thereof
  • A kind of diesel adsorbent and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0056] The preparation of embodiment 1 diesel oil adsorbent

[0057] (1) Crab shell pretreatment

[0058] 50g crab shells were washed clean, dried, ground and pulverized through a 100-mesh sieve, soaked in 500ml 6% hydrochloric acid solution at 30°C for 4 hours, washed to neutrality, and then soaked in 500ml 6% sodium hydroxide solution at 90°C for 2 hours, Then, immersed in 500ml of 50% sodium hydroxide solution at 90°C for 9 hours, washed until neutral, and dried to obtain 16g of pretreated crab shell powder;

[0059] (2) Preparation of pyrolysis biochar

[0060] 16g of dried and pulverized crab shell powder in step (1) was added with water and acetic acid, placed in the reactor according to the weight ratio of crab shell powder: water: acetic acid=1:5:5, compacted and tightly covered and placed in an oven Pyrolysis at 180°C for 10 hours; obtain 2.8g of biochar after pyrolysis;

[0061] (3) Preparation of diesel adsorbent

[0062] 2.8 g of the pyrolyzed biochar prepared ...

Embodiment 2

[0065] Example 2 Adsorption of diesel oil by diesel adsorbent (different adsorption time)

[0066] 1) get the diesel oil adsorbent 0.01g in embodiment 1 and 100mL concentration be the diesel waste water solution mixing of 6g / L;

[0067] 2) by adding 0.1mol / L hydrochloric acid or 0.1mol / L sodium hydroxide, the pH value of the mixed solution is adjusted to 7, and the adsorption is carried out at room temperature for different times; the mixed solution after the adsorption is obtained;

[0068] 3) Centrifuge the adsorbed mixed solution at 5000 r / min for 10 min, take the supernatant to measure its OD value, and calculate the adsorption capacity and adsorption rate of diesel fuel by formula (1) (2). The results are shown in Table 1 and Figure 5 shown.

[0069] It can be seen from Table 1 that the diesel adsorption firstly increased rapidly, reaching the adsorption equilibrium at 180 min, and the maximum adsorption rate was 80.1%.

[0070] Table 1

[0071] Adsorption t...

Embodiment 3

[0072] Example 3 Adsorption of diesel oil by diesel adsorbent (different adsorbent dosage)

[0073] 1) get the diesel oil adsorbent 0.005g, 0.01g, 0.015g, 0.02g, 0.025g in embodiment 1 and mix with the diesel waste water solution that 100mL concentration is 6g / L respectively;

[0074] 2) By adding 0.1 mol / L hydrochloric acid or 0.1 mol / L sodium hydroxide, the pH value of the mixed solution is adjusted to 7, and adsorbed at room temperature for 180 min;

[0075] 3) Centrifuge the adsorbed mixed solution at 5000 r / min for 10 min, take the supernatant to measure its OD value, and calculate the adsorption capacity and adsorption rate of diesel by formula (1) (2). The results are shown in Table 2 and Image 6 shown.

[0076] It can be seen from Table 2 that within the range of 0.005-0.025g, with the increase of the amount of diesel adsorbent, the adsorption capacity of diesel adsorbent to diesel increases sharply, and then gradually becomes flat.

[0077] Table 2

[0078] ...

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Abstract

The invention relates to a diesel oil adsorbent and a preparation method thereof, and a method for adsorbing diesel oil. The diesel oil adsorbent of the present invention is prepared by using crab shells as a raw material by hydrothermal carbonization technology, and the appearance of the diesel oil adsorbent is black powder. , the pore size is 3‑20nm, and the pore volume is 0.0763cm 3 / g, specific surface area 17.01m 2 / g, it has diffraction peaks at 23° and 39°, and the carapace peak at 19° is significantly enhanced by X-ray diffractometry analysis, and the infrared spectrum shows that it is at 3259.6cm ‑1 , 2358.9cm ‑1 , 1668.4cm ‑1 , 1377.1cm ‑1 , 1072.4cm ‑1 , 893.04cm ‑1 There are absorption peaks. The diesel adsorbent of the invention has abundant pores and oxygen-containing functional groups, can efficiently adsorb diesel, and has a maximum removal rate of 80.1%; meanwhile, it is safe, non-toxic, convenient to use, and does not cause secondary pollution.

Description

technical field [0001] The invention belongs to the technical field of adsorbents, and particularly relates to a diesel adsorbent and a preparation method thereof. Background technique [0002] Diesel is a mixture of various complex hydrocarbons and is a light petroleum product. Diesel is the most widely used in diesel engines of vehicles and ships. With the rapid advancement of science and technology, the connection between the world is bound to become closer and closer, so the demand for transportation will also increase rapidly, so the demand for diesel will also continue to increase. However, in many different steps such as oil refining and transportation, it will cause huge water pollution. The main source of pollution is oil and its derivatives that are accidentally leaked on the way. This kind of wastewater is called oily wastewater. Oily wastewater is a huge hazard, and will have very bad negative effects on humans, animals, including microorganisms, and other orga...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J20/20B01J20/28B01J20/30C02F1/28C02F1/40C02F103/08
CPCB01J20/20B01J20/28033B01J20/28059B01J20/28071B01J20/28083C02F1/283C02F1/40B01J2220/4881C02F2103/08
Inventor 纪丽丽韩笑郭健王亚宁蔡璐
Owner ZHEJIANG OCEAN UNIV
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