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Aggregation and deposition behaviors of dissolved black carbon with coexisting heavy metals in aquatic solution

Yanghui Xu,Qin Ou,Caihong Liu,Xiaojun Zhou,Qiang He,Zhengsong Wu,Ruixing Huang,Jun Ma,Dongming Lu,Xiaoliu Huangfu

Published 2020 in Environmental science. Nano

ABSTRACT

The aggregation and deposition behaviors of colloidal or dissolved black carbon (DBC) with coexisting heavy metals are important to understand the fate of DBC and the associated contaminants in environmental and engineering systems. Time-resolved dynamic light scattering (DLS) and quartz crystal microbalance with dissipation (QCM-D) techniques were employed to study the effect of cation concentration and properties on the aggregation and deposition behaviors of DBC with divalent heavy metals (Pb2+, Cu2+, Cd2+ and Zn2+). The aggregation experiments suggested that divalent heavy metals significantly destabilized DBC due to strong complexation and cation–π interaction, and the destabilization ability of these metal cations was related to their electronegativity (critical coagulation concentration (CCC): Pb2+ Cd2+ > Cu2+ > Zn2+). Overall, these results provide new insights into the aggregation and deposition behaviors of DBC with coexisting heavy metals in aquatic solution, which are helpful to understand the fate of DBC and the associated contaminants.

PUBLICATION RECORD

  • Publication year

    2020

  • Venue

    Environmental science. Nano

  • Publication date

    2020-09-17

  • Fields of study

    Chemistry, Environmental Science

  • Identifiers
    DOI 10.1039/d0en00373e
  • External record

    Open on Semantic Scholar

  • Source metadata

    Semantic Scholar

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