Preparation method of adsorbent

By preparing ZrFe-BC adsorbent, the problem of zirconium oxide loss in wastewater treatment was solved, achieving efficient and economical sulfate ion removal, with good regeneration performance and broad application potential.

CN122076381APending Publication Date: 2026-05-26SHENHUA XINJIANG ENERGY CO LTD
0 Cites 0 Cited by

Patent Information

Application Number
CN202610035906.X
Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Priority Date
2024-11-29
Filing Date
2026-01-12
Publication Date
2026-05-26

AI Technical Summary

Technical Problem

In existing technologies, zirconium oxide is easily lost during the absorption of SO42-, and additional solid-liquid separation equipment is required, which increases operating costs and complexity, limiting its application in large-scale wastewater treatment.

Method used

Using ginkgo leaves as raw material, ZrFe-BC adsorbent was prepared through pretreatment, pyrolysis, ball milling, ultrasonic treatment and hydrothermal reaction. By controlling the mass ratio of ZrOCl2·8H2O to FeCl3 to 7:3, zirconium oxide and iron oxide were loaded on the surface of biochar to form a stable composite structure.

Benefits of technology

The prepared ZrFe-BC adsorbent exhibits excellent removal efficiency for sulfate ions, achieving an initial removal rate of 93.16%, and maintaining a removal efficiency of 78.05% after four adsorption-regeneration cycles. This significantly reduces wastewater treatment costs and also demonstrates the ability to remove various anions.

✦ Generated by Eureka AI based on patent content.
Patent Text Reader

Abstract

The invention provides a preparation method of an adsorbent, which comprises the following steps: obtaining a first raw material which is ginkgo leaf; pretreating the first raw material to obtain a to-be-treated raw material; pyrolyzing the to-be-treated raw material to obtain a pyrolysis product; polishing the pyrolysis product to obtain a polished product; obtaining a second raw material, carrying out ultrasonic treatment on the second raw material, precipitating with an alkali solution, stirring to obtain a mixed solution, introducing the mixed solution and the polishing product into a hydrothermal reaction kettle, carrying out hydrothermal reaction to obtain a hydrothermal reaction product, and carrying out post-treatment on the hydrothermal reaction product to obtain an adsorbent; the problems that in the prior art, zirconium oxide is prone to loss in the SO4 < 2-> absorption process, and additional solid-liquid separation equipment needs to be added are solved.
Need to check novelty before this filing date? Find Prior Art