Looking for breakthrough ideas for innovation challenges? Try Patsnap Eureka!

Method for rapidly deeply degrading organic dye wastewater with low cost

An organic dye and low-cost technology, which is applied in the field of low-cost, rapid and deep degradation of organic dye wastewater and the treatment of organic dye wastewater, can solve the problems of unsatisfactory treatment effect, high energy consumption demand, complex reaction equipment requirements, etc. Effects of light cost optimization, strong applicability, degradation efficiency and cost control improvement

Active Publication Date: 2014-03-12
SHANGHAI ACADEMY OF ENVIRONMENTAL SCIENCES +1
View PDF4 Cites 6 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] It can be seen that the existing organic dye wastewater treatment process requires relatively high energy consumption and relatively complicated requirements for reaction equipment, and the above two dye wastewater degradation methods based on sodium bismuthate (i.e. sodium bismuthate rapid oxidation method and Sodium bismuthate solar photocatalytic mineralization method) has its own advantages and disadvantages, and the effect of using one of them alone is not ideal

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] Prepare 60mg / L crystal violet aqueous solution to simulate dye wastewater (the solution does not need to remove impurities, and the pH value is in the range of 6-11), and measure 200mL into the process (B) reactor. Weigh 0.15g of sodium bismuthate and 0.05g of silver nitrate to react to synthesize bismuth-silver oxide, and put it into a reactor to start the reaction under stirring. After reacting for 45 minutes, the decolorization rate and mineralization rate of the crystal violet solution under direct oxidation were measured.

[0023] Prepare a 60mg / L crystal violet aqueous solution to simulate dye wastewater, and take 200mL of the same amount and put it into the process (C) reactor. Weigh 0.15g of sodium bismuthate (0.75g / L) and mix it with the dye solution and react under sunlight for 45min to measure the decolorization rate and mineralization rate of the crystal violet solution under the catalysis of sunlight.

[0024] Finally, a crystal violet solution of the same...

Embodiment 2

[0027]Prepare 100mg / L saffron red aqueous solution to simulate dye wastewater (the solution does not need to remove impurities, and the pH value is within the range of 6-11), and measure 200mL of dye solution into the process (B) reactor. The reactor can be any simple container in which a stirring bar is placed to stir the solution under the action of the stirrer. Weigh 0.15g of sodium bismuthate and 0.05g of silver nitrate to synthesize bismuth-silver oxide, and put it into a reactor to start the reaction under the action of stirring. After 20min of the direct oxidation process, the dye solution has been basically decolorized. The decolorized waste water is all transferred to the process (C) reaction vessel after centrifugation. Weigh 0.15g of sodium bismuthate (0.75g / L) and put it into the above solution. After fully mixing under the action of stirring, the dye solution is further deeply degraded by sunlight irradiation, and the reaction in this step is carried out for 80 m...

Embodiment 3

[0031] Prepare 65mg / L alizarin red aqueous solution to simulate dye wastewater (the solution does not need to remove impurities, and the pH value is within the range of 6-11). Measure 200mL of the dye solution into the process (B) reactor, in which a stirring bar is placed, and the solution is stirred under the action of the stirrer. Synthesize bismuth-silver oxide according to the weight ratio of sodium bismuthate:silver nitrate of 3.5:1, weigh 0.2g of synthesized bismuth-silver oxide and put it into a reactor to start the reaction under the action of stirring. After 15 minutes of direct oxidation, the dye solution has been basically decolorized. The decolorized waste water is all transferred to the process (C) reaction vessel after centrifugation. Weigh 0.3g of sodium bismuthate (1.5g / L) and put it into the above solution. After fully mixing, the dye solution is further degraded by sunlight irradiation, and the reaction in this step is carried out for 70 minutes. The detec...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

No PUM Login to View More

Abstract

A disclosed method for rapidly deeply degrading organic dye wastewater with low cost comprises: (A) removing impurities with grids, standing for precipitating, adjusting the pH value to 6-11; (B) introducing wastewater into a reaction container, adding bismuth silver oxide synthesized from sodium bismuthate and silver nitrate, performing a multi-phase homogeneous mixing reaction with stirring at room temperature and normal pressure, after the wastewater is basically decolored, centrifuging and discharging the wastewater; and (C) introducing the last-stage water into another reaction container, adding sodium bismuthate with an amount of 0.75-2 g / L, reacting with stirring under the irradiation of sunshine, and discharging the processes wastewater, wherein the bismuth silver oxide is synthesized from sodium bismuthate and silver nitrate with a weight ratio of (2.5-3.5):1. According to the method, a two-step combination method which means combination of sodium bismuthate rapid oxidation and sodium bismuthate catalyzed sunshine mineralization is employed for processing dye wastewater, and thus the purpose of performing decoloring, degradation and mineralization on dye wastewater in short time is realized; the synthesis ratio of bismuth silver oxide is optimized; and by employing sunshine for deep degradation, the cost is relatively low and also the photocatalysis efficiency of sodium bismuthate is improved.

Description

Technical field: [0001] The invention belongs to the technical field of dye wastewater treatment, and relates to a method for treating organic dye wastewater, in particular to a low-cost method for rapidly and deeply degrading organic dye wastewater. Background technique: [0002] With the development of printing and dyeing and dye industry, the annual output of dyes in the world is about 800,000 to 900,000 tons, and the annual output of dyes in my country reaches 150,000 tons, ranking in the forefront of the world (The hazards of printing and dyeing wastewater and source control measures, Zhu Hongfei, Environmental Science and Management, 2007). There are many kinds of dye compounds, most of which are organic dyes, which are widely used in various technical fields, involving various branches including: leather industry, paper making, food technology, agriculture, light array, photoelectrochemical cell, etc. The large-scale production and use of dyes have caused serious poll...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
IPC IPC(8): C02F1/72C02F1/30
CPCY02W10/37
Inventor 喻恺罗启仕孙成杨绍贵
Owner SHANGHAI ACADEMY OF ENVIRONMENTAL SCIENCES
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Patsnap Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Patsnap Eureka Blog
Learn More
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic, Popular Technical Reports.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com