Carboxymethyl chitosan-cyclodextrin-activated carbon composite material and application thereof

Abstract

The invention discloses a carboxymethyl chitosan-cyclodextrin-activated carbon composite material for treating sewage. 6-aminated cyclodextrin is used as a cross-linking agent to crosslink carboxymethyl chitosan into a complex network structure, and activated carbon molecules are uniformly distributed on the network structure to form a composite material with huge molecular structure and strong adsorption capacity; firstly, the molecular structure is huge, the adsorption capacity is high, various pollutants such as proteins, carbohydrates, fat, urea or ammonia nitrogen in sewage can be adsorbed, heavy metal ions in the sewage can also be adsorbed, and the water purification effect is superior to that of a traditional inorganic water purification agent; by adopting the water treatment agentfor treating the sewage, various eutrophic ions and heavy metals in the sewage can be effectively removed at the same time, and the limitation that a conventional water treatment agent can only adsorb and remove single nitrogen-rich or phosphorus-rich nutrient elements is broken through.

Description

technical field [0001] The invention relates to the technical field of sewage treatment, in particular to a carboxymethyl chitosan-cyclodextrin-activated carbon composite material for sewage treatment and a sewage treatment agent prepared therefrom. Background technique [0002] Pollutants of domestic sewage and industrial sewage are mainly organic matter and various heavy metal ions, such as protein, carbohydrate, fat, urea or ammonia nitrogen, etc., heavy metal ions such as lead, chromium, etc., eutrophication is serious, and the types of pollutants are relatively miscellaneous. Unstable, easy to rot and produce stench, so domestic and industrial sewage must be treated before discharge; [0003] At present, there are mainly chemical methods, physical methods, physicochemical methods and biological methods to treat and control domestic and industrial sewage. Among them, physical methods are commonly used methods. The adsorption process is simple and reliable. It can be used...

AI Technical Summary

Problems solved by technology

[0003] At present, there are mainly chemical methods, physical methods, physicochemical methods and biological methods to treat and control domestic and industrial sewage. Among them, physical methods are commonly used methods. The adsorption process is simple and reliable. It can be used as a separate treatment method or It can be used in conjunction with chemical and biological methods, and has become a common method for treating domestic and industrial sewage. At present, there are more and more studies on the use of adsorption methods to treat domestic and industrial sewage at home and abroad. Commonly used adsorbents include activated carbon, zeolite, and diatoms. Soil, etc., although the existing adsorbents have large adsorption capacity, they are expensive, have short service life, and high operating costs. Therefore, the search for adsorbents with better adsorption performance and low price is also the direction of research in this field.

[0004] In addition, the current conventional water treatment agents generally have outstanding adsorption capacity for certain pollutants, such as nitrogen in them alone, or phosphorus in them alone, and there are few composite water treatment agents that have adsorption capabilities for multiple pollutants at the same time. ; Finally, the post-treatment problem after the water treatment agent absorbs sewage is also a problem that needs to be solved urgently at present. If it is directly discarded, it will cause solid waste pollution

Images