Bismuth Tungstate--Dyeing Wastewater Treatment with Acrylic Composite Fiber
Dye pollution is one of the most important environmental pollution sources in the world.
Dye wastewater has the characteristics of complex composition, high chromaticity, large amount of emission, toxicity and biochemical degradation. It has been a difficult problem in wastewater treatment.
In recent years, with the development of photocatalytic technology, more and more photocatalysts have been developed. Bismuth tungstate has been widely used for its excellent photocatalytic degradation ability, there is no doubt that bismuth tungstate has better degradation effect on dye wastewater. However, in recent years, it has been found that bismuth tungstate is good, but it is easy to assemble, difficult to separate and difficult to recover. In order to solve this problem, some scholars have proposed a scheme for making composite materials of bismuth tungstate and acrylic fiber.
Acrylic fiber is also called polyacrylonitrile fiber, also known as synthetic wool, and bismuth tungstate does not seem to be related, how are they made of composite materials, and what effect will it have?
The researchers used wet spinning technology to prepare bismuth tungstate-acrylic composite fiber, the general process is as follows:
At room temperature, 20 mL DMSO was added to the conical flask, and five water bismuth nitrate and two sodium tungstate were added into the flask according to the amount of substance 2 to 1, and each ultrasonic was dispersed for a period of time. Adding acrylic fiber, stirring with magnetic force for14 h, prepared into a mass fraction of 10% of the spinning solution, prepared into a mass fraction of 10% of the spinning solution. In 40% dimethyl sulfoxide aqueous solution for wet spinning, after that, the obtained composite fiber is placed in a hot air drying box and dried at 35 °C.
The product began to rise from 40 degrees of temperature, with a certain temperature gradient, heating up to the specified temperature, The bismuth tungstate acrylic fiber with photocatalytic property was obtained by constant temperature reaction for10 h.
What are the advantages of bismuth tungstate acrylic fiber prepared by such a great deal of setbacks? The experimental results show that the bismuth tungstate acrylic fiber not only continues the photodegradation characteristics of bismuth tungstate, the defects of bismuth tungstate for difficult separation and difficult recovery of dye wastewater are also improved, especially for methylene blue wastewater, the photo degradation ability of bismuth tungstate acrylic fiber reaches a small height.
If you have any inquiry of tungsten, please feel free to contact us:
Tel.: +86 592 5129696/+86 592 5129595
Fax: +86 592 5129797
Scan QR code of Chinatungsten Wechat platform to follow up the daily latest price and market of tungsten, molybdenum and rare earth.
评论
发表评论