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Method for removing antibiotics in water

A technology for antibiotics and water removal, applied in chemical instruments and methods, water pollutants, adsorbed water/sewage treatment, etc., can solve problems such as high cost and inconformity with optimal use of resources, and achieve good application prospects

Inactive Publication Date: 2017-08-01
SOUTH CHINA INST OF ENVIRONMENTAL SCI MEP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the cost of producing biochar with organic matter such as starch is relatively high, and it is obviously not in line with the principle of optimal resource utilization in today's global resource scarcity. Therefore, solid waste with high carbon content such as straw, straw, forest felling waste, The preparation of biochar from sugarcane bagasse and residual sludge from sewage plants not only avoids environmental pollution but also generates new energy, and is a good way to turn waste into resources

Method used

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  • Method for removing antibiotics in water
  • Method for removing antibiotics in water

Examples

Experimental program
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Effect test

Embodiment 1

[0030] A method for removing antibiotics in water, the specific steps are as follows:

[0031] 1) Preparation of sugarcane activated carbon:

[0032] Rinse the collected sugarcane skins with tap water, air-dry them for 2 days, put them in an oven at 70°C for 12 hours, and use a pulverizer to pulverize them to a particle size below 2cm. Wrap the weighed sugarcane husk powder with tinfoil and place it in a porcelain crucible, cover it and put it into a tubular carbonization furnace, raise it to the target temperature of 500°C at a biological rate of 10°C / min, keep it for 2 hours, and cool it down naturally After reaching room temperature the product was ground through a 50 mesh screen. Subsequently, treat it with 1200mL 1mol / L hydrochloric acid for 2 hours to remove ash such as calcium carbonate, filter it with a circulating water multi-purpose vacuum pump, wash it with deionized water to be neutral, put it in an oven at 80°C for 24 hours, and transfer it to the sample Store i...

Embodiment 2

[0038] The preparation and modification method of sugarcane activated carbon are the same as in Example 1, wherein, the biochar fired at 300, 500, and 700°C is prepared with concentrated sulfuric acid, concentrated nitric acid, 30% hydrogen peroxide and 0.4mol / L potassium permanganate solution. The four oxidants were modified by impregnation and ultrasonic impregnation respectively. There were 8 modification methods in total. The biochar raw material used in each method was 11.25g, totaling 90g. Among them, the impregnation and ultrasonic impregnation methods are as follows:

[0039] Immersion modification: Put 11.25g of washed biochar into a 1000mL beaker, and add 400mL of oxidant and activated carbon into the beaker to fully contact, take out the solid after 24 hours and wash it repeatedly until neutral, then put it in an oven at 60°C Oven dry for 12 hours to constant weight.

[0040] Ultrasonic impregnation modification: put 11.25g of washed biochar into a 1000mL beaker, a...

Embodiment 3

[0050] Weigh 0.5g of biochar fired at 500°C and ultrasonically impregnated with 30% hydrogen peroxide into a 50mL colorimetric tube, add 10mL of sulfonamide antibiotics with a concentration of 20mg / L, and shake at constant temperature. , 20, 40, 60, 90, 120, and 180 min, take out and filter, and analyze the concentration of sulfonamide antibiotics in the filtrate.

[0051] Table 2 The adsorption efficiency of different antibiotics as a function of time

[0052] time Methoxazole Thiazole methyl pyrimidine Dimethylpyrimidine 5min 90.09％ 42.62％ 37.70％ 58.43％ 10min 91.07％ 45.08％ 39.77％ 61.92％ 20min 92.86％ 53.01％ 47.68％ 70.40％ 40min 93.31％ 55.15％ 48.99％ 71.99％ 60min 94.65％ 61.72％ 56.98％ 77.76％ 90min 95.21％ 63.87％ 58.53％ 81.19％ 120min 95.51％ 66.43％ 61.41％ 82.58％ 180min 96.03％ 69.71％ 64.24％ 84.96％

[0053] The results are shown in Table 2 and Figure 4 As shown, it shows that the adsorption...

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Abstract

The invention discloses a method for removing antibiotics in water. The method comprises the following steps: 1) pretreating collected sugarcane bark, and placing the pretreated sugarcane bark into a tubular carbonization furnace for burning to obtain sugarcane activated carbon; 2) adding a modifier into the sugarcane activated carbon for modifying; 3) removing antibiotics in water by using the modified sugarcane activated carbon. By adopting the method, the yield of biomass charcoal is about 31 percent, the yield is about 89 percent after ultrasonic impregnation modification of 30-percent hydrogen peroxide, and the produced biomass charcoal can efficiently absorb sulfonamide antibiotics in water, and has higher adsorption capacity for sulfonamide antibiotics such as sulfamethoxazole, thiazole, methylpyrimidine and dimethylpyrimidine under the adsorption condition that pH is equal to 4 and the temperature is 35 DEG C; in particular, the activated carbon has a best removing effect after being burned at the temperature of 500 DEG C and being subjected to modification with the 30-percent hydrogen peroxide and ultrasonic impregnation modification; a good way for recycling resources is provided by taking bagasse as a raw material for preparing the biomass charcoal; the biomass charcoal can absorb the antibiotics in water, and has a very good application prospect in the aspect of removal of other pollutants.

Description

technical field [0001] The invention belongs to the technical field of sewage treatment, in particular to a method for removing antibiotics in water. Background technique [0002] Antibiotics tend to remain in the environment for a long time due to their structural stability and environmental persistence. The use of antibiotics also makes it often detectable in water bodies in our country. At present, the removal of antibiotics in water mainly relies on conventional water treatment processes. Since general domestic sewage treatment plants at home and abroad are designed and constructed to remove organic matter and some nutrients, the ability to remove antibiotics is limited. Traditional sewage treatment plants adopt pretreatment, primary treatment, and secondary treatment systems. Conditional sewage treatment plants will also start tertiary treatment procedures (such as chemical oxidation, activated carbon adsorption, or ultraviolet oxidation, etc.). The pretreatment and p...

Claims

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Application Information

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IPC IPC(8): C02F1/28B01J20/20B01J20/30C02F101/38
Inventor 黄大伟秦品珠邴永鑫张政科郑文丽崔恺卓琼芳
Owner SOUTH CHINA INST OF ENVIRONMENTAL SCI MEP
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