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Method for preparing charcoal-supported attapulgite nano composite by using antibiotic wastewater

A technology for nanocomposite materials and antibiotic wastewater, applied in chemical instruments and methods, alkali metal compounds, alkali metal oxides/hydroxides, etc., can solve the problems of high operating costs, improve adsorption performance, realize reuse, improve The effect of adsorption performance

Active Publication Date: 2016-02-03
LANZHOU INST OF CHEM PHYSICS CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

The method takes the biochemically treated antibiotic wastewater as the treatment object, adopts activated carbon filtration, pH value adjustment, and nanofiltration combined process for advanced treatment, and uses activated carbon filtration to further remove the residual refractory organic matter in the biochemical effluent, and reduce the organic pollution of the nanofiltration membrane. , and then adjust the pH value of the activated carbon effluent to reduce the inorganic pollution of the nanofiltration membrane, and finally use the nanofiltration membrane to effectively remove the remaining organic matter and multivalent ions in the wastewater, realizing the treatment and reuse of antibiotic wastewater, but the operating cost is still relatively high

Method used

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  • Method for preparing charcoal-supported attapulgite nano composite by using antibiotic wastewater
  • Method for preparing charcoal-supported attapulgite nano composite by using antibiotic wastewater
  • Method for preparing charcoal-supported attapulgite nano composite by using antibiotic wastewater

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Experimental program
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Effect test

Embodiment 1

[0027] Under the condition of stirring at 200 rpm, 100kg of attapulgite clay was added to 1000L of the mixed solution of sulfuric acid and chloroacetic acid (the mass concentration of sulfuric acid was 0.6%, and the mass concentration of chloroacetic acid was 2.4%), stirred for 4 hours, and passed through a filter press. After pressure filtration, it is sent to a rotary kiln for calcination at 400°C for 2 hours, crushed, and treated with aureomycin-containing wastewater by dynamic adsorption for 24 hours (solid-liquid ratio is 1:10kg / L), and after pressure filtration, it is sent to a rotary kiln in a nitrogen atmosphere. , calcined and carbonized at 200°C for 1 h, and finally washed, dried, and sieved to obtain attapulgite nanocomposites loaded with biochar. The adsorption capacities of the composite for Pb(II), Cd(II) and Cu(II) were 56, 30 and 28 mg / g, respectively.

Embodiment 2

[0029]Under the stirring condition of 200 rpm, add 150kg of attapulgite clay into 1000L of the mixed solution of sulfuric acid and glycine (the mass concentration of sulfuric acid is 2%, the mass concentration of glycine is 8%), stir for 2 hours, and filter through the filter press After that, it is sent to the rotary kiln for calcination at 200°C for 1 hour, crushed, treated with oxytetracycline-containing wastewater by dynamic adsorption method for 12 hours (solid-liquid ratio is 1:15kg / L), and sent to the rotary kiln after pressure filtration, nitrogen atmosphere, 400 ℃ calcination and carbonization for 2 hours, and finally washed, dried, and sieved to obtain the attapulgite nanocomposite material loaded with biochar. The adsorption capacities of the composite for Pb(II), Cd(II) and Cu(II) were 70, 42 and 39 mg / g, respectively.

Embodiment 3

[0031] Under the condition of stirring at 200 rpm, 200kg of attapulgite clay was added to 1000L of the mixed solution of sulfuric acid and glycine (the mass concentration of sulfuric acid was 4%, and the mass concentration of citric acid was 16%), stirred for 3 hours, and pressed by a filter press. After filtration, it is sent to the rotary kiln, calcined at 500°C for 2 hours, and after crushing, it is treated with wastewater containing tetracycline for 24 hours by dynamic adsorption method (solid-to-liquid ratio is 1:5kg / L), and then sent to the rotary kiln after pressure filtration. Roasting and carbonizing at 600°C for 4 hours, and finally washing, drying, and sieving to obtain the attapulgite nanocomposite material loaded with biochar. The adsorption capacities of the composite for Pb(II), Cd(II) and Cu(II) were 92, 48 and 45 mg / g, respectively.

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Abstract

The invention discloses a method for preparing a charcoal-supported attapulgite nano composite by using antibiotic wastewater, which belongs to the technical field of a composite material. According to the invention, attapulgite clay is processed by compound acid, so that carbonate in the attapulgite clay is fully decomposed, an adsorption duct of the attapulgite can be dredged, a surface-modification function group is simultaneously endowed, adsorptive property on antibiotic can be effectively increased; the attapulgite capable of adsorbing the antibiotic is taken as a carbon source, micropores and a meso-structure of the attapulgite can be activated through calcining treatment, and the adsorption performance of the attapulgite on heavy metal ions can be obviously increased through in-site support of charcoal. The method realizes antibiotic waste water treatment, and realizes reutilization of organic molecules such as the antibiotic, so that an adsorbent with excellent adsorption performance can be obtained, and the method has wide application prospect on water body purification, soil improvement and restoration.

Description

technical field [0001] The invention relates to a method for preparing an attapulgite nanocomposite material, in particular to a method for preparing an attapulgite nanocomposite material loaded with biochar by using antibiotic wastewater. Background technique [0002] Pharmaceutical wastewater is industrial wastewater formed through pharmaceutical production, mainly including four types: industrial wastewater generated in the production of antibiotics, industrial wastewater generated in the production of Chinese patent medicines, industrial wastewater generated in the production of synthetic medicines, and the production process of various pharmaceutical preparations in the wash water. Wastewater has the characteristics of complex composition and high toxicity, and has become one of the sources of wastewater pollution at this stage. [0003] Antibiotic wastewater treatment methods are mainly divided into physical, chemical and biological methods. Among them, the adsorptio...

Claims

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Application Information

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IPC IPC(8): B01J20/12B01J20/20B01J20/28B01J20/30
Inventor 王爱勤唐洁牟斌宗莉
Owner LANZHOU INST OF CHEM PHYSICS CHINESE ACAD OF SCI
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