articleNature CommunicationsJan 16, 2026GOLD OA

Spatiotemporally ordered topological transformation in layered double hydroxides enables synergistic mineralization of AsIII/Cd2+

MZMeiqi ZhengHDHuanxu DuXCXiaoqing CaoSXSi-Min XuWCWei Chen

Beijing University of Chemical Technology · Quzhou University · +2 more institutions

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Abstract

The co-contamination of arsenite (AsIII) and cadmium (Cd2+) poses a significant challenge in environmental remediation due to their divergent chemical speciation and transformation pathways. Here, a redox-active layered double oxide (MgMn-LDO) is designed, and achieves adsorption capacities of 821.7 mg g‒1 for AsIII and 1895.6 mg g‒1 for Cd2+ in their coexisting system, presenting a state-of-the-art performance. Unexpectedly, the co-adsorption system not only enhances individual adsorption capacities but also accelerates the adsorption rate by 181‒fold compared to single-component systems. The LDO undergoes a four-stage spatiotemporally ordered topological transformation, which effectively decouples the…

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Topics & keywords

Topics
Keywords
  • Adsorption
  • Oxide
  • Arsenite
  • Mineralization (soil science)
  • Environmental remediation
  • Layered double hydroxides
  • Cadmium
  • Topology (electrical circuits)
UN Sustainable Development Goals
  • Clean water and sanitation
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