The aggregation kinetics of manganese oxides nanoparticles in Al(III) electrolyte solutions: Roles of distinct Al(III) species and natural organic matters.

  title={The aggregation kinetics of manganese oxides nanoparticles in Al(III) electrolyte solutions: Roles of distinct Al(III) species and natural organic matters.},
  author={H. Cheng and Tao Yang and J. Ma and Jin Jiang and Panxin Wang},
  journal={The Science of the total environment},
This study explored the aggregation kinetics of manganese oxides (MnOx) nanoparticles in Al(III) electrolyte solutions. This is a common process in both water treatments and the natural environment. The results show that aggregation kinetics are Al(III) species-dependent. Without natural organic matters (NOM), ferron Ala (monomeric Al(III)) and ferron Alb (polymeric Al(III)) are the main species controlling the Derjaguin-Landau-Verwey-Overbeek (DLVO) type aggregation behavior of MnOx at pH 5.0… Expand
1 Citations
Mn2+ effect on manganese oxides (MnOx) nanoparticles aggregation in solution: Chemical adsorption and cation bridging.
The results show that Mn2+ was highly efficient in destabilizing Mn Ox nanoparticles and behaved as a cation bridge linking both the negatively charged MnOx and humic acid, thereby increasing the stability of the MnOx nanoparticles as a result of the steric repulsion of the adsorbed Humic acid. Expand


Aggregation Kinetics of Manganese Oxides Formed from permanganate activated by (Bi)sulfite: Dual Role of Ca2+ and MnII/III.
This study highlights the dual role, dependent on either presence or absence of SRFA, of Ca2+ and MnII/III in controlling the aggregation of manganese oxides nanoparticles. Expand
Hydrolyzed Al(III) clusters: speciation stability of nano-Al13.
Results showed that concentration and temperature exhibited different roles on the stability of Al13, but at low concentrations, Al13 solution was quite stable at normal temperature, but lost its stability quickly when heating to 90 degrees C. Expand
Aggregation kinetics of manganese dioxide colloids in aqueous solution: influence of humic substances and biomacromolecules.
The steric repulsive forces, originated from organic layers adsorbed on MnO2 colloidal surfaces, may be mainly responsible for their stabilizing effects, however, the complexes formed by alginate and Ca(2+) (>5 mM) might play a bridging role and thus enhanced MnO 2 colloidal aggregation instead. Expand
Formation and stability of NOM-Mn(III) colloids in aquatic environments.
This work characterized the chemical and physical properties of humic acid based (HA)-Mn(III) colloids formed over a range of environmentally relevant conditions and quantified their subsequent aggregation and stability behaviors, showing that molar C/Mn ratios and HA types (Aldrich HA (AHA) and Pahokee peat soil HA (PPSHA)) are critical factors influencing HA-Mn ( III) colloidal properties. Expand
Enhanced aggregation of alginate-coated iron oxide (hematite) nanoparticles in the presence of calcium, strontium, and barium cations.
An aggregation mechanism incorporating the gelation of alginate is proposed to explain the accelerated aggregate growth in the presence of Ca2+, Sr2+, and Ba2+. Expand
Formation, Aggregation, and Deposition Dynamics of NOM-Iron Colloids at Anoxic-Oxic Interfaces.
The importance of the redox transformation of Fe(II) to Fe(III) and the C/Fe ratio for the formation and stability of NOM-Fe colloids that occur in subsurface environments with anoxic-oxic interfaces is highlighted. Expand
Speciation stability of inorganic polymer flocculant–PACl
The speciation distribution, physico-chemical properties of coagulants, and principles for their further species transformation under various water and wastewater treatment conditions are ofExpand
A Kinetic Study of the Reduction of Colloidal Manganese Dioxide by Oxalic Acid
A kinetic study of the reaction between colloidal manganese dioxide and oxalic acid in aqueous acetate media (pH 4.3–5.1) is reported. The reaction is autocatalytic and, in order to determine theExpand
Systematic studies on the binding of metal ions in aggregates of humic acid: Aggregation kinetics, spectroscopic analyses and MD simulations.
These findings are important for understanding not only how the influence of metal ions on the aggregation of HA is understood, but also the conditions which ions more efficient for aggregation. Expand
Coagulation mechanisms of humic acid in metal ions solution under different pH conditions: A molecular dynamics simulation.
Computational studies provide insights into the intrinsic mechanisms of the aggregation behavior of HAs and their complexation with metal ions and are a highly effective tool for qualitatively evaluating their roles in environmental remediation. Expand