Method of preventing and controlling chromium pollution in dark green glass production and used chelate fiber

Abstract

The invention discloses a synthetic method of a chelate fiber NTHF. The synthetic method comprises the steps of taking a grafting acrylic acid polytetrafluoroethylene fiber as a parent, and soaking the grafting acrylic acid polytetrafluoroethylene fiber into N,N-dimethyl formamide; then, adding a ligand for stirring and reacting; filtering a product obtained through reacting, washing an obtained filter cake and drying to constant weight, so as to obtain the chelate fiber NTHF which has high preferential adsorption capability to Cr(VI). The invention also discloses a method of preventing and controlling chromium pollution in dark green glass production. The method comprises the steps of after adding the chelate fiber NTHF into wastewater generated in a dark green glass production process, performing static settlement, and absorbing heavy metal in the wastewater by utilizing the chelate fiber NTHF; the heavy metal comprises chromium. By adopting the method provided by the invention, the chromium in chromate waste water generated in the dark green glass production can be absorbed and recycled effectively.

Description

technical field [0001] The present invention relates to a kind of method of synthesizing novel chelate fiber, be specifically related to take grafted acrylic polytetrafluoroethylene fiber (PTFE-g-AA) as matrix, take nicotinic acid hydrazide (NTH) as ligand, thereby synthesize the (VI) ion has the chelating fiber NTHF of efficient selective adsorption performance, is used for the method for preventing and treating chromium-containing waste water pollution problem in dark green glass production process. Background technique [0002] my country can produce nearly 300,000 chromium slags every year. It not only occupies a large amount of land, but also seriously pollutes the environment, which has caused certain pressure on national economic construction, ecological environment protection and sustainable development of the whole society. In recent years, chromium slag has been used as a coloring agent for the production of flat green glass and dark green beer bottles, replacing ...

AI Technical Summary

Problems solved by technology

The disadvantage of this technology is mainly that the price of the extraction agent used is mostly expensive, the organic solvent is more volatile, and the environmental pollution is serious. Another common problem in the extraction of heavy metals is that the composition of the feed liquid needs to be adjusted before extracting each heavy metal, and The multi-stage extraction process is also cumbersome, and sometimes it is easy to form a third phase

However, due to the fact that some adsorption reactions occur inside the microspheres during elution, and are affected by the cross-linked network, there are disadvantages such as tailing during elution, which greatly reduces the reuse efficiency of the chelating resin.

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