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A primary battery system for efficient remediation of cadmium pollution and electricity generation

Primary battery system designed for efficient remediation of cadmium pollution and power generation simultaneously
Mechanism of primary battery based on Cd2+-contaminated (a) water and (b) soil. Credit: Chen Chaowen

A team lead by Prof. Wu Zhengyan and Prof. Zhang Jia from the Institute of Intelligence, Hefei institutes of physical science of Chinese Academy of Sciences, in collaboration with Prof. Cai Dongqing from Donghua University, constructed a new primary battery system that can effectively remove Cd2+ from the environment and generate electricity at the same time.

In paper published in Fundamental Research recently, the team described how they applied zinc as the anode, graphite as the cathode, and Cd2+-contaminated media (Cd2+- or soil) as the electrolyte to develop this system.

Cd2+, with high solubility and migration rate, causes severe problems in ecosystems and . Although the traditional technologies can remediate Cd2+-contaminated water and soil, their practical application may be largely constrained by the high energy consumption and operation complexity. Therefore, there is an urgent need to develop new remediation technologies on Cd2+-contaminated media.

The battery system achieved efficient solidification and removal of Cd2+ in water and soil through the reduction of dissolved oxygen by internal Galvanic reactions in the battery. A large amount of OH was generated and precipitated with Cd2+ driven by an .

They designed an output power supply through connection of multiple primary systems in series. In the process of Cd2+ removal, LEDs were continuously lit.

Primary Battery System Designed for Efficient Remediation of Cadmium Pollution and Power Generation Simultaneously. Credit: CHEN Chaowen

"The idea is to kill two birds with one stone," said Chen Chaowen, the first author of the paper.

They also checked plants, zebrafish, and microorganisms after applying this system and found they were all healthy.

The technology shows characteristics of low cost, green energy conservation, and simple operation, possessing broad application prospects.

More information: Chaowen Chen et al, A primary battery for efficient cadmium contamination remediation and electricity generation, Fundamental Research (2023). DOI: 10.1016/j.fmre.2023.03.001

Provided by Hefei Institutes of Physical Science, Chinese Academy of Sciences
Citation: A primary battery system for efficient remediation of cadmium pollution and electricity generation (2023, April 12) retrieved 18 May 2024 from
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