Unlock instant, AI-driven research and patent intelligence for your innovation.

Supported nanosized iron alloy catalyst and method for advanced printing and dyeing wastewater treatment

A ferroalloy and catalyst technology, which is applied in the field of loaded nano-ferroalloy catalyst and advanced treatment of printing and dyeing wastewater, can solve the problems of unstable performance and easy agglomeration of nanometer zero-valent iron, and achieve more reactive, high catalytic activity and uniform coating effect

Active Publication Date: 2015-09-02
NANJING SHENKELONG ENVIRONMENTAL PROTECTION
View PDF3 Cites 5 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, due to the easy agglomeration and unstable performance of nano-zero-valent iron, it is necessary to study new materials to prevent its aggregation and sedimentation

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

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Supported nanosized iron alloy catalyst and method for advanced printing and dyeing wastewater treatment
  • Supported nanosized iron alloy catalyst and method for advanced printing and dyeing wastewater treatment
  • Supported nanosized iron alloy catalyst and method for advanced printing and dyeing wastewater treatment

Examples

Experimental program
Comparison scheme
Effect test

preparation example Construction

[0038] The reaction formula for preparing nano-scale zero-valent metal described in the aforementioned second step is:

[0039] R n+ +2nBH 4 - +6nH 2 O→R+2nB(OH) 3 +7nH 2

[0040] The present invention uses the catalyst prepared by the above method for the treatment of printing and dyeing wastewater, and the specific method is as follows:

[0041] Take the printing and dyeing wastewater, adjust the pH to 5.0-7.0, add it to the beaker containing the nano-iron alloy catalyst prepared above (the catalyst quality is 60-100g / L, can be used many times), catalyze for 45-90min, add PAC, and add solid PAC Amount of 10-15ppm, stirring for three minutes, adding alkali to adjust the pH to 6.5-8.0, adding PAM, stirring flocculation, standing for precipitation, sampling analysis shows that the use of nano-iron alloy catalysts can treat refractory pollutants in printing and dyeing wastewater.

Embodiment 1

[0042] Embodiment 1: Preparation of nano-iron alloy catalyst

[0043] First step to buy 95% Al 2 o 3The ceramic sheet is used as the carrier and heated in an alcohol water bath with a volume concentration of 50% to degrease; add 40% roughening liquid HF solution with a volume of 40ml / L and 2g / L NH 4 F, Ultrasonic at room temperature, ultrasonic frequency is 40KHz, power is 150W, time is 40min, wash; put the roughened ceramic sheet into 10g / L SnCl 2 With 40ml / L HCl sensitization solution, ultrasonic at room temperature, rinse; put the sensitized ceramic piece into 0.25g / L PdCl 2 With 2.5mL / L HCl activation solution, sonicate at room temperature, rinse.

[0044] Step 2: At 25°C and N 2 Under the atmosphere, put the treated ceramic sheet into a container, add an appropriate amount of EDTA, platinum salt, nickel salt and iron salt solution (molar ratio is 10:1:1:18), and mix well, then quickly add an appropriate amount of Adjust NaBH at pH=14 with anaerobic alkaline solution ...

Embodiment 2

[0045] Embodiment 2: the comparison of nano-iron alloy and conventional iron-carbon micro-electrolysis

[0046] The first step, water quality before wastewater treatment:

[0047] Biochemical effluent of a sewage treatment plant

[0048] Mainly printing and dyeing wastewater, accounting for 90% of the total wastewater

[0049] pH: 7.41

[0050] COD: 302mg / L

[0051] Chroma: 200 times

[0052] The second step, the preparation of nano-iron alloy catalyst: to buy 95% Al 2 o 3 The ceramic sheet is used as the carrier and heated in an alcohol water bath with a volume concentration of 50% to degrease; add 40% roughening liquid HF solution with a volume of 40ml / L and 2g / L NH 4 F, Ultrasound at room temperature, rinse; put the roughened ceramic sheet into 10g / L SnCl 2 With 40ml / L HCl sensitization solution, ultrasonic at room temperature, rinse; put the sensitized ceramic piece into 0.25g / L PdCl 2 With 2.5mL / L HCl activation solution, ultrasonic at room temperature, rinse; at ...

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

The invention relates to a supported nanosized iron alloy catalyst and a method for advanced printing and dyeing wastewater treatment. The invention relates to the nanosized iron alloy catalyst adopting activated 95 percent of Al2O3 ceramics as a carrier, and the mole ratio of iron alloy Pt / Ni / Fe is 1:1:18. The supported nanosized iron alloy catalyst overcomes the defects that the catalytic efficiency is low and the like caused by the reason that the contact probability of iron and carbon is weakened due to the channeling phenomenon since catalyzed iron inner-electrolysis can easily cause hardening and layering. The reduction treatment capacity of printing and dyeing wastewater is obviously improved; various toxic pollutants are reduced and transformed; effluent COD (Chemical Oxygen Demand), pH value and chromaticity reach to the first level discharge standard of Textile Dyeing and Finishing Industry Pollutant Discharge Standard (GB4287-92); the phenomena of agglomeration and sediment of nanocrystalline metal are reduced; the defect that gold plating is easy to run off under the water blast during engineering utilization is avoided; the catalyst is recovered effectively; countless tiny primary cells are formed favorably to generate galvanic corrosion; the iron deoxidization potential and the reaction rate are increased; higher reaction activity is realized.

Description

technical field [0001] The invention belongs to the field of printing and dyeing wastewater treatment, and in particular relates to a loaded nano-iron alloy catalyst and a method for advanced treatment of printing and dyeing wastewater. Background technique [0002] In my country's industrial wastewater, printing and dyeing wastewater accounts for a large proportion. Printing and dyeing wastewater has high chroma, high COD concentration, many toxic substances (nitro and amine-based compounds, copper, chromium, zinc, arsenic and other heavy metal elements), poor biodegradability, large discharge, many types, complex components, and harmful to the environment. It has become one of the difficult-to-treat industrial wastewater recognized at home and abroad due to its characteristics of great harm to human health. [0003] Before the present invention was made, the treatment methods for printing and dyeing wastewater at home and abroad mainly contained physical methods (such as ...

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): B01J23/89C02F1/70C02F9/04C02F103/30
Inventor 田宝凤江双双程成
Owner NANJING SHENKELONG ENVIRONMENTAL PROTECTION