Glycine Leaching Agent

Selective heavy metal extraction

Extracts heavy metals while retaining calcium, offering a green option for fly ash resource utilization.

Li, Hailong · Xu, Zhenyao · Peng, Yaqi · Xu, MengXia · Li, Hongxian · Han, Zhongkang · Lu, Shengyong · Jianhua, Yan

Journal of Environmental Management 2025

Specifications

Cd leaching efficiency improvement

{'zh': '79.8', 'en': '79.8'} %

Cu leaching efficiency improvement

{'zh': '74.3', 'en': '74.3'} %

Ni leaching efficiency improvement

{'zh': '36.3', 'en': '36.3'} %

Zn leaching efficiency improvement

{'zh': '64.5', 'en': '64.5'} %

Advantages

Minimizes calcium loss

Glycine acts as a proton donor and chelating agent that preferentially binds heavy metal cations, reducing calcium dissolution.

Boosts leaching efficiency

For heavy metals bound to Fe-Mn oxides, glycine markedly increases leaching efficiency compared to HCl treatment.

Green and mild

Uses an amino acid-based agent under mild conditions, avoiding the corrosiveness and secondary pollution of strong acids.

Applications

• Fly ash resource utilization：Removes heavy metals while retaining calcium, making fly ash more suitable for construction material reuse.
• Green leaching agent：Replaces strong acids with an amino acid reagent, reducing corrosion and secondary pollution.
• Heavy metal pollution remediation：Efficiently removes multiple heavy metals from fly ash, lowering environmental risks.