New materials are expected to increase seawater desalination and metal recovery efficiency

In seawater desalination, new materials can filter specific ions instead of filtering all ions separately. An international research team has recently developed a new material that can efficiently filter salt in seawater and separate metal ions in seawater. It is expected to increase the efficiency of seawater desalination and metal recovery, and has enormous economic value.

A team of scientists from Australia, the United States, and China reported in a new issue of the American Journal of Scientific Progress that they prepared a metal-organic framework material that mimics the filtration capabilities of biological cell membranes and efficiently Filter salt in seawater and remove metal ions in seawater.

Metal-organic framework material is a new type of porous material that has been very popular in recent years and has great application value in catalysis, energy storage and separation.

Researchers believe that the reverse osmosis membrane technology used by many desalination plants and water treatment plants in the world consumes relatively high energy. In contrast, new materials can filter specific ions instead of filtering all ions without adding them separately. The method is more economical and energy-saving.

In addition, the technology is also expected to be used to recover valuable metals. One potential application is the extraction of metallic lithium. Lithium is widely used in energy and high-end manufacturing industries. Lithium-ion batteries are widely used in portable electronic devices. This makes some countries consider lithium as a scarce strategic resource. Therefore, there is an increasing market demand for obtaining lithium from seawater or recovering lithium from waste water.

One of the research collaborators, Professor Wang Huan-Ting of Monash University in Australia, said that seawater is rich in lithium ions, and this membrane material can selectively filter out lithium ions, which is currently used for the low-efficient extraction of lithium from rocks and brines. With reference significance. The research team will continue to study how to develop products that can be applied.

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