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Natural plant material of processing cationic dye in industrial wastewater and method thereof

A cationic dye and wastewater treatment technology, which is applied in chemical instruments and methods, adsorption water/sewage treatment, and other chemical processes, can solve the problems of activated carbon restricting the widespread use of activated carbon, affecting the universal use of activated carbon, and difficult regeneration of activated carbon. High price, high cost, and the effect of saving regeneration costs

Inactive Publication Date: 2008-07-23
NANJING UNIV
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  • Abstract
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  • Application Information

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Problems solved by technology

Although the tertiary treatment can effectively remove the chroma of organic matter in the dye chemical wastewater, the treatment cost is very expensive, and the regeneration of activated carbon has always been difficult to solve in a more economical and effective way, which has become a factor that affects the more common use of activated carbon. a key question
Therefore, the high price of activated carbon and the difficulty of regeneration greatly restrict the widespread use of activated carbon.

Method used

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  • Natural plant material of processing cationic dye in industrial wastewater and method thereof
  • Natural plant material of processing cationic dye in industrial wastewater and method thereof

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Embodiment Construction

[0032] 1. Preparation of grapefruit peel particles:

[0033] Shred the pomelo peel, dry it in a constant temperature drying oven at 80°C to constant weight, then soak it in distilled water for 2 hours to remove dust and foreign matter, then take it out and dry it in a constant temperature drying oven at 80°C to constant weight, and use a grinder After crushing, sieve to obtain 40-60 mesh, 60-80 mesh, 80-100 mesh, 100-120 mesh and 120-140 mesh particles, which are stored in a dry place for later use.

[0034] 2. Cationic Dye Screening

[0035] Methylene blue referred to as MB, λ max =660nm; neutral red referred to as NR, λ max =520nm, all purchased from Shanghai Sanaisi Reagent Co., Ltd. Prepare a 200mg / l stock solution with distilled water, and dilute it according to the required concentration when used.

[0036] 2.1 Cationic dye standard curve

[0037] Take 1, 2, 3, 5, 6, 8, 10mg / l two kinds of dye solutions, measure the absorbance values ​​at the respective maximum abso...

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Abstract

The invention pertains to the technical field of industrial effluents treatment, which more particularly relates to the adoption of a natural plant material, grapefruit shell, which is widely available but not utilized at present. After the grapefruit shell is ground, the optimality condition for treating effluents is obtained through test according to the characteristics of the cations in the grapefruit shell and industrial effluents to achieve the effect of better removing the cationic dyes in the effluents. The preferred process method is that: Under the condition of room temperature and stirring, the pH of the effluents is adjusted to 3 to 12 by acid or alkali, and 0.25 to 7 g of grapefruit shell particles with the particle size of 40 to 140mm is added to each liter of water, then the effluents are stirred at least for 15 minutes. The grapefruit shell particles are separated and the purpose of removing the cationic dyes in the effluents is achieved. Under the best treatment condition, the removing rate can reach above 95%. Compared with the activated carbon which is widely used at present, the invention has obvious cost advantages in the treatment of dyeing effluents. Compared with the existing adsorbent made from natural plant materials, the removal efficiency is much better.

Description

1. Technical field [0001] The invention belongs to the technical field of industrial sewage treatment, and specifically relates to the use of grapefruit peel, a widely available natural plant material that has not been used at present, and according to the characteristics of cations in grapefruit peel and wastewater, the optimal conditions for treating wastewater are obtained through experiments, so as to achieve better The best way to remove the effect of cationic dyes in wastewater. 2. Background technology [0002] At present, domestic printing and dyeing wastewater treatment is mainly based on biochemical methods, and it is basically the same in foreign countries. In recent years, some research work has been carried out at home and abroad, mainly in the research of new biological treatment process and high-efficiency special bacteria, as well as the exploration of new chemical agents and the development of high-efficiency decolorization coagulant. The removal of chroma ...

Claims

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Application Information

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IPC IPC(8): B01J20/24B01J20/30C02F1/28
Inventor 李建龙胡长伟周殷薛峰
Owner NANJING UNIV
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