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Method for degrading sulfadiazine in water by activating persulfate with coagulated sludge

A technology of persulfate and sulfadiazine, applied in the field of harmless treatment of pollutants, can solve the problems of low resource utilization, heavy workload, secondary pollution, etc., and achieve the effect of simple preparation method and low cost

Inactive Publication Date: 2019-01-11
NANJING NORMAL UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Due to the large workload and high cost of sludge post-processing, and the potential secondary pollution problems in traditional landfill methods, resource utilization has become an important research direction for coagulation sludge treatment and disposal.
At present, the resource utilization of coagulation sludge is mainly the acid-dissolving reuse of iron and aluminum salts and the utilization of building materials. The resource utilization rate is low and the cost is high. The treatment and disposal of coagulation sludge is still an environmental problem to be solved urgently.

Method used

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  • Method for degrading sulfadiazine in water by activating persulfate with coagulated sludge

Examples

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Effect test

Embodiment 1

[0019] A method utilizing coagulated sludge to activate persulfate to degrade sulfadiazine in water, comprising the following steps:

[0020] 1. Preparation of persulfate activator: air-dry the coagulated sludge naturally, crush it, dry it at 120°C for 2 hours, and crush it through a 120-mesh sieve; take the crushed sludge and put it in a tube furnace, and carry out in a nitrogen atmosphere Pyrolysis, the black carbonized material obtained after cooling, the pyrolysis steps are as follows: firstly, the temperature is raised to 600°C at a rate of 5°C / min, and then naturally cooled to room temperature after staying for 50min; the nitrogen flow rate used is 200mL / min, and the whole pyrolysis process starts from From the beginning of heating up to cooling down to room temperature, nitrogen is used as a protection to prevent material oxidation.

[0021] 2. Black carbonized material is used to activate persulfate to degrade sulfadiazine in water: add carbonized material to sulfadiaz...

Embodiment 2

[0024] A method utilizing coagulated sludge to activate persulfate to degrade sulfadiazine in water, comprising the following steps:

[0025] 1. Preparation of persulfate activator: air-dry the coagulated sludge naturally, crush it, dry it at 120°C for 2 hours, and crush it through a 120-mesh sieve; take the crushed sludge and put it in a tube furnace, and carry out in a nitrogen atmosphere Pyrolysis, the black carbonized material obtained after cooling, the pyrolysis step is to first raise the temperature to 700°C at a rate of 8°C / min, and then cool naturally after staying for 70 minutes; the nitrogen flow rate used is 300mL / min, and the whole pyrolysis process starts from the temperature rise When the temperature is lowered to room temperature, nitrogen is used as protection to prevent material oxidation.

[0026] 2. Black carbonized material is used to activate persulfate to degrade sulfadiazine in water: add carbonized material to sulfadiazine wastewater, and react in a sh...

Embodiment 3

[0029] A method utilizing coagulated sludge to activate persulfate to degrade sulfadiazine in water, comprising the following steps:

[0030] 1. Preparation of persulfate activator: air-dry the coagulated sludge naturally, crush it, dry it at 120°C for 2 hours, and crush it through a 120-mesh sieve; take the crushed sludge and put it in a tube furnace, and carry out in a nitrogen atmosphere Pyrolysis, the black carbonized material obtained after cooling, the pyrolysis steps are as follows: firstly, the temperature is raised to 800°C at a rate of 10°C / min, and then naturally cooled to room temperature after staying for 80min; the nitrogen flow rate used is 400mL / min, and the whole pyrolysis process starts from From the beginning of heating up to cooling down to room temperature, nitrogen is used as a protection to prevent material oxidation.

[0031] 2. Black carbonized material is used to activate persulfate to degrade sulfadiazine in water: add carbonized material to sulfadia...

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Abstract

The invention relates to a method for degrading sulfadiazine in water by activating persulfate with coagulated sludge. The method comprises the following steps: 1, preparing a persulfate activator: carrying out natural air-drying, crushing, drying, crushing and sieving on the coagulated sludge; taking the crushed sludge, adding the crushed sludge into a tubular furnace, pyrolyzing the sludge in anitrogen atmosphere, and cooling the obtained pyrolysis product to obtain a black carbonized material; and 2, acting persulfate with the prepared carbonized material to treat sulfadiazine wastewater:adding carbonized material to the sulfadiazine wastewater, carrying out a reaction on a shaking table at room temperature, adding the persulfate, and continuing the reaction under the above conditions, wherein a detection result shows that the method has a high removal rate. The method has the advantages of realization of recycling of wastes by using the coagulated sludge as a main raw material, simple and easy preparation process, low cost, and great application prospect in the removal of antibiotics and other refractory organic pollutants.

Description

technical field [0001] The invention relates to the field of harmless treatment of pollutants, in particular to a method for using coagulated sludge to activate persulfate to degrade sulfadiazine in water. Background technique [0002] With the development and widespread use of the antibiotic industry, a large amount of antibiotic-containing wastewater is discharged into the water environment. The concentration of active antibiotics in antibiotic wastewater is high and has a strong inhibitory effect on microorganisms. Therefore, traditional biological treatment methods are often not effective in treating such wastewater. Currently, advanced oxidation technology is considered to be an effective method to deal with organic pollutants such as antibiotics. Compared with coagulation, membrane separation, adsorption and other technologies, the advanced oxidation method can achieve efficient degradation and removal of organic matter, and the operation is simple, and there is no se...

Claims

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Application Information

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IPC IPC(8): C02F1/72C02F11/10C10B53/00C02F101/34C02F101/38
CPCC10B53/00C02F1/722C02F11/10C02F2101/40C02F2101/38C02F2101/34Y02W10/40
Inventor 史宸菲王国祥韩睿明黄鹤勇张满帆聂鹂尧宋倩倩
Owner NANJING NORMAL UNIVERSITY
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