Method for treating water solution heavy metallic ion by using trititanic acid sodium whisker

Abstract

The present invention discloses a method for removing heavy metal ions from water solutions with sodium tri-titanate whiskers (cation exchange method). Sodium tri-titanate whiskers are directly used as the ion exchange resin in an ion exchange column, and when water passes through the ion exchange column, the contained heavy metal ions can be removed. The Sodium tri-titanate whiskers are prepared by the following steps: mixing materials, sintering, quenching and crushing to a demanded granularity. The method of the present invention has simple process, large exchange capacity, high exchange rate and low cost, and is suitable for treatment of low heavy-metal water of various qualities and nuclear waste containing radioactive heavy metal ions.

Description

technical field [0001] The invention relates to a water treatment method (cation exchange method), in particular to a method for removing heavy metal ions with low content in various water quality by using sodium trititanate whiskers, including a method for removing heavy metal ions in nuclear waste. Background technique [0002] It is known that the methods for removing heavy metal ions in aqueous solution with high concentration of heavy metal ions include methods such as concentration and enrichment, extraction, membrane permeation, etc., which are convenient for the recovery and utilization of heavy metals. Some cation exchange methods are also used. Generally, the exchange capacity of cation exchangers is small, the exchange rate is low, and the cost is too high, so it is difficult to form industrialized facilities. However, these methods are not suitable for aqueous solutions with low concentrations of heavy metal ions, mainly because of high cost, low efficiency, and ...

AI Technical Summary

Problems solved by technology

There are also cation exchange methods. Generally, the exchange capacity of cation exchangers is small, the exchange rate is low, and the cost is too high, so it is difficult to form an industrialized facility.

However, these methods are not suitable for aqueous solutions with low concentrations of heavy metal ions, mainly because of high cost, low efficiency, and complicated processes.

Under normal circumstances, most of the aqueous solution with low concentration of heavy metal ions is directly discharged into the wastewater system, and long-term discharge will cause the enrichment of heavy metal ions in the water system, which will destroy the balance of the ecosystem and cause heavy metal pollution to the environment.