Preparation method of industrial high-arsenic sludge treatment material

Abstract

The invention discloses a preparation method of an industrial high-arsenic sludge treatment material. The industrial high-arsenic sludge treatment material is prepared from egg shells, sodium chloride, acetic acid, calcium hypochlorite, stearic acid, chitosan, chloroacetic acid, silver nitrate, beta-cyclodextrin, polyacrylic acid and other raw materials. According to the preparation method, an arsenic stabilizer is prepared from the egg shells, and minerals such as calcium arsenate are formed by combining and fixing sodium hypochlorite and arsenic; high-toxicity trivalent arsenic is oxidized into pentavalent arsenic; the obtained silver particle-loaded chitosan, arsenic stabilizer and the like are embedded by the beta-cyclodextrin on the basis of the previous steps, and a stable fibrous membrane structure is formed through electrostatic spinning and thermal crosslinking. Therefore, an obtained fibrous membrane material is better in effect than a traditional stable curing agent, can well realize stabilizing up-to-standard treatment of arsenic-containing sludge, is convenient to recycle, and can be repeatedly used after being subjected to regeneration treatment; the high-arsenic sludge treatment cost is greatly reduced, and the industrial high-arsenic sludge treatment material has an extremely good reference function for stabilizing treatment engineering application of high-concentration arsenic-containing sludge.

Description

technical field [0001] The invention relates to the technical field of environmental remediation, in particular to a preparation method of an industrial high-arsenic sludge treatment material. Background technique [0002] Industrial sludge refers to the solid waste produced after wastewater precipitation treatment, most of which contain a large amount of toxic and harmful substances, and its safe disposal technology has become the focus of research. Stabilization technology is a common technology for the safe treatment of hazardous wastes such as sludge, waste residue and soil containing toxic and harmful elements. This technology changes the chemical form and mineral composition of harmful elements by adding stabilizing agents, thereby reducing the solubility, mobility and toxicity of harmful elements, and reaching the standard of safe landfill. According to the occurrence form and valence state of polluting elements in industrial sludge, the selection and use of reasonab...

AI Technical Summary

Problems solved by technology

Usually, membrane materials can only retain bacteria and have no antibacterial or bactericidal functions. Therefore, membrane biofouling is a technical problem in the field of membrane use and separation technology.

[0005] Chitosan is a natural cationic polysaccharide, which has the advantages of wide sources, low price, non-toxic and harmless, and degradable. Its molecular chain contains a large number of amino groups and hydroxyl groups, which can form stable chelates with many metal ions. Due to the insoluble properties of chitosan in common solvents, its application is limited