Enhancement of Mercury Sorbent Using Metal Aluminate Carbonates with Chloride under Hydrothermal Conditions

Abstract

Mercury sorbents M–Al–CO3 (M=Mg2+, Mn2+, Fe2+, Cu2+, or Zn2+) were prepared by the coprecipitation of M2 + and Al3+ in an alkaline NaOH/Na2CO3 solution. The formation of a layered double hydroxide structure significantly enhanced Hg removal, uniquely with a suitable binder as a support. Both Hg(NO3 )2 and HgCl2 were used to perform the capture test. The calcined sorbent exhibited superior efficiency, particularly for materials having bivalent states of mixed oxide (MO), such as calcined Mn and Fe. Chloride ions effectively raised the mercury scrubber efficiency, regardless of the type of sorbent. The results show that synthetic sorbents can provide 96% removal of Hg at 200°C. In addition, a suitable binder such as TiO2 can be used as a support for dispersing metal oxides, which significantly decreases the MO content while maintaining a high equivalent capture capacity.

Addressing the Environmental Concerns: Statistical Approach for Mg2+ and Mn2+ Mitigation in Water System Sustainability in Indonesia

“…The findings hold significant implications for environmental management and public health, offering potential solutions to address water quality challenges in similar contexts worldwide. (Yu and Lin, 2016) The compounds Mg 2+ and Mn 2+ are metal ion compounds commonly found in their salt forms (MgSO4 and MnSO4), in the form of their metal oxides (MgO and MnO), or as part of naturally occurring mineral compounds. Magnesium (Mg 2+ ) is a silvery-white metal that is insoluble in cold water (Kheibarian et al, 2022), while manganese (Mn 2+ ) is a white-grayish metal classified as a heavy metal (atomic mass = 54.94 g/mol)…”