Method of catalytic reduction treatment on nitrobenzene wastewater by utilizing Korean pine source charcoal

A technology for nitrobenzene wastewater and charcoal, which is applied in the fields of reduced water/sewage treatment, chemical instruments and methods, water/sludge/sewage treatment, etc., to achieve the effects of mild reaction system, simple and easy method, and low energy consumption

Inactive Publication Date: 2012-07-04
BEIJING NORMAL UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

As mentioned above, the development of these technologies provides more means for treating nitrobenzene wastewater and reducing the pollution of nitrobenzene substances to the environment, but these methods have certain defects and limitations, so it is necessary to develop a Mild reaction conditions, simple, fast and efficient treatment method

Method used

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  • Method of catalytic reduction treatment on nitrobenzene wastewater by utilizing Korean pine source charcoal
  • Method of catalytic reduction treatment on nitrobenzene wastewater by utilizing Korean pine source charcoal
  • Method of catalytic reduction treatment on nitrobenzene wastewater by utilizing Korean pine source charcoal

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Embodiment 1

[0026] Embodiment 1: Sulfide reduction nitrobenzene

[0027] In 8 200ml anaerobic simulated reactors, adding pH is 7 phosphate buffers and concentration is the nitrobenzene waste water of 100mg / L, is filled with high-purity nitrogen in reactor (to remove the oxygen in the reaction system, Form anaerobic environment), add 35mg / L, 100mg / L, 170mg / L, 240mg / L reducing agent sulfide respectively in the reactor, then, do not add catalyst in No. 1-4 reactor, in No. 5-8 60 mg of Korean pine source charcoal was respectively added into the reactor as a reaction catalyst. The reactor was sealed and placed in a rotary oscillator, and the reaction was shaken at a speed of 150-200 rpm at normal temperature and pressure for 72 hours. After the reaction, the reduced product was aniline. The conversion rate of nitrobenzene is shown in Table 1.

[0028] The conversion rate of nitrobenzene under the hydrogen sulfide reduction condition of table 1

[0029]

Embodiment 2

[0030] Embodiment 2: Reductive conversion of nitrobenzene under different pH conditions

[0031] The difference from Examples 1 and 2 is that different buffers are added to different reactors so that the pH of the reaction system is 1, 3, 5, 7, 9, 13, 14 respectively, and after 72 hours of reaction The conversion rate of nitrobenzene is shown in Table 2.

[0032] The conversion rate of nitrobenzene under different pH values ​​in table 2

[0033]

[0034]

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Abstract

The invention belongs to the technical field of environment protection wastewater treatment and relates to a method of catalytic reduction treatment on nitrobenzene wastewater by utilizing Korean pine source charcoal. The method comprises the main steps of adding buffer solution and the nitrobenzene wastewater with certain concentration into an anaerobic simulation reactor containing black carbon powder weighed in advance, inflating 99.99% high-purity nitrogen to a reaction system (in order to remove oxygen in the system to form an anaerobic environment), adding reductant sulfide with certain concentration into the reactor, and finally placing the reactor into a rotary oscillator to perform oscillation reaction at the normal temperature and the normal pressure. The reaction system is temperate, reaction is fast and efficient, treatment cost is low, and the treatment method can solve actual problems and has remarkable economic advantages and environmental advantages.

Description

technical field [0001] The invention belongs to the technical field of environmental protection wastewater treatment, and relates to a method for treating nitrobenzene wastewater by catalytic reduction of Korean pine source charcoal. Background technique [0002] Nitrobenzene organic compounds are important chemical raw materials or intermediates, widely used in fuel, medicine, explosives, pesticides and polymer chemical industries, most of these organic compounds and their transformation products in the environment are internationally recognized Hazardous chemicals, which are suspected mutagenic and carcinogenic to organisms, capable of causing neurological symptoms, anemia, liver disease, etc. Nitrobenzene has extremely high stability in water. Because its density is higher than that of water, nitrobenzene entering the water body will sink to the bottom of the water, and because it has a certain solubility in water, the water body and anaerobic deposition caused by this su...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F1/70C02F101/38
Inventor 刘新会于晓东巩文雯何慧戴国华
Owner BEIJING NORMAL UNIVERSITY
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