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Magnesium modified biomass and application thereof

A biomass and modification technology, applied in water pollutants, other chemical processes, water/sludge/sewage treatment, etc., can solve the problems of high repair cost, low repair efficiency, secondary pollution, etc., and achieve low environmental risk. , The effect of short production cycle and strong adsorption capacity

Inactive Publication Date: 2017-02-22
NANJING UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] Purpose of the invention: In view of the technical problems existing in the prior art, the present invention provides a magnesium-modified biomass and its application to solve the problem of high repair cost, low repair efficiency, It is easy to cause secondary pollution to the environment, and realize the economical and efficient restoration of antibiotic pollutants in groundwater

Method used

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  • Magnesium modified biomass and application thereof
  • Magnesium modified biomass and application thereof
  • Magnesium modified biomass and application thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0035] A kind of preparation of the magnesium-modified biochar of the present invention, biochar raw material selects pine sawdust for use, and concrete preparation method is as follows:

[0036] The biomass raw material pine sawdust was cleaned with deionized water, then dried at 80°C for 24 hours, the dried pine sawdust was crushed, and pine sawdust powder was obtained by passing through a 100-mesh sieve;

[0037] Appropriate amount of MgSO 4 ·7H 2 O was added to ultrapure water to configure a volume of 500mL and a concentration of 0.25mol L -1 , 0.5mol L -1 MgSO 4 solution, and then the 20g pine sawdust powder obtained in step (1) was added to the MgSO 4 In the solution, keep the ratio of the mass of magnesium ions in the solution and the amount of pine wood powder added to be 0.30 and 0.15 respectively, and the two mixed suspensions are operated at a constant speed and a constant temperature range (30±2°C) with constant temperature magnetic stirring Stirring in a cont...

Embodiment 2

[0042] Magnesium modified biochar of the present invention is used for removing levofloxacin in groundwater, comprises the following steps:

[0043] Take 25mL with an initial concentration of 15-150mg L -1 The levofloxacin salt solution of the present invention is added respectively the magnesium-modified biochar WCM315, WCM330, WCM615 that the present invention makes, gets 25mL initial concentration and is 25~200mg L -1 Add the magnesium-modified biochar WCM630 prepared by the present invention to the levofloxacin salt solution, the dosage of the four kinds of adsorbents is 0.05g, vibrate in a constant temperature oscillation box at 30°C for 24 hours, and filter through a filter membrane of 0.45μm. Liquid chromatograph measures the content of unadsorbed levofloxacin in the aqueous solution, and the calculated adsorption result is as follows: image 3 shown. Depend on image 3 It can be seen that during the preparation process, when the ratio of the mass of magnesium ions t...

Embodiment 3

[0045] Magnesium modified biochar of the present invention is used for removing levofloxacin in groundwater, comprises the following steps:

[0046] Take 25mL of the initial concentration of 100mg L -1 , 150mg L -1 , 100mg L -1 , 150mg L -1 The levofloxacin solution was added to the magnesium-modified biochar WCM315, WCM330, WCM615, and WCM630 prepared by the present invention, respectively, and the dosage of the four kinds of adsorbents was 0.05g. They were shaken in a constant temperature oscillation box at 30°C for 24 hours, and passed through 0.45 μm The filter membrane is filtered, and the content of unadsorbed levofloxacin in the aqueous solution is measured by high performance liquid chromatography, and the calculated adsorption amount result is as follows: Figure 4 shown. Depend on Figure 4 It can be seen that the adsorption capacity of WCM315, WCM330, WCM615 and WCM630 four kinds of magnesium-modified biochars to levofloxacin all increased with time, and they a...

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Abstract

The invention discloses magnesium modified biomass, which is obtained by mixing biomass powder with a MgSO4 solution and then performing vacuum suction filtration, drying and high-temperature pyrolysis. The invention further provides application of the magnesium modified biomass to removal of antibiotics from underground water. The method has the advantages that the removal efficiency on levofloxacin in the underground water is high; the adsorption capability is high; the maximum adsorption quantity on the levofloxacin in the underground water reaches 7.5mg g<-1> to 27mg g<-1>; the levofloxacin in the underground water can be continuously adsorbed in a long time range; in an implantation process, new waste or pollutants cannot be generated; the environment risk is low; meanwhile, the preparation method is simple; the production period is short; special or expensive chemical engineering equipment is not needed; the industrial production can be easily realized.

Description

technical field [0001] The invention relates to a method for removing antibiotics in groundwater, in particular to magnesium-modified biomass and its application. Background technique [0002] Antibiotics are widely used as drugs that can selectively inhibit or affect biological functions. The annual consumption of antibiotics in the world is as high as 100,000 to 200,000 tons. Since antibiotics cannot be completely absorbed by organisms, more than 85% of them are excreted in the form of original drugs and metabolites through the feces and urine of patients and animals, and enter the surface and groundwater environment through sewage treatment plants, animal manure application, etc., and the surface remains After entering the vadose zone, the antibiotics finally enter the groundwater through leaching, percolation, and surface water-groundwater interaction. At present, antibiotics have been detected in groundwater bodies in many countries such as China, Europe and the United...

Claims

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Application Information

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IPC IPC(8): B01J20/20B01J20/30C02F1/28C02F101/30
CPCB01J20/041B01J20/20C02F1/283C02F2101/30
Inventor 孙媛媛易升泽吴吉春胡忻徐红霞
Owner NANJING UNIV
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