Enhanced metal-based composite water purifying agent and preparation method thereof

By constructing a multi-level structure of chitosan-sodium alginate polymer dispersion system and polyphenol-polymetallic complex, and combining it with calcium chloride and sodium silicate crosslinking, the prepared composite water purifier solves the problems of flocculation performance and stability of existing water purifiers under complex water quality conditions, and achieves the effects of rapid flocculation, stable sedimentation and efficient removal of pollutants.

CN120964916AActive Publication Date: 2025-11-18WUXI BISHENG WATER TREATMENT AGENT CO LTD
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Patent Information

Application Number
CN202511396577.3
Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Filing Date
2025-09-28
Publication Date
2025-11-18
Estimated Expiration
2045-09-28

AI Technical Summary

Technical Problem

Existing metal-based water purification agents have insufficient flocculation performance under complex water quality conditions, poor storage stability, and difficulty in effectively removing anionic pollutants such as phosphate and chromate.

Method used

A stable polymer dispersion system was constructed using chitosan and sodium alginate. A multi-layered composite water purification agent was prepared by complexing polyphenolic compounds with polyvalent metal ions and cross-linking coating with calcium chloride and sodium silicate. Polyaluminum chloride was used to improve flocculation performance and stability.

Benefits of technology

It significantly improves flocculation performance and storage stability, enabling rapid flocculation and sedimentation, effectively removing suspended solids and specific pollutants from water, adapting to various complex water quality conditions, and maintaining long-term physical form and chemical activity.

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Abstract

The invention discloses an enhanced metal-based composite water purifying agent and a preparation method thereof, belongs to the technical field of preparation of water purifying agents, and aims to solve the technical problem that the flocculation capacity and the stability of a composite water purifying agent in the prior art need to be further improved. The preparation method specifically comprises the following steps: preparing a water purifying agent skeleton dispersion liquid by using chitosan and sodium alginate; chitosan-sodium alginate is used as a porous framework, a polyphenol-multi-metal complex is loaded, a structure is enhanced through Ca < 2 + > crosslinking, then SiO2 is used for coating to improve acid and alkali resistance and stability, and finally PAC is introduced to realize rapid flocculation. In the preparation process, the organic framework, the metal complex and the inorganic coating layer are fully compounded through pH control and step-by-step dropwise adding, and the obtained composite water purifying agent can efficiently remove phosphorus, chromium and suspended solids in water and shows a remarkable synergistic purification effect and storage stability.
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