Wood
with abundant nutrition transport channels could be considered
as a kind of natural water purifier due to quick and effective passages
for separation. Nevertheless, microporosity as the main porous structure
of initial wood is not enough to effectively separate small molecules,
such as organic dye pollutants. Meanwhile, like most filters, the
fouling resulting in blocking and poor water flux will also restrict
their large scale. Here, we incorporate Fenton-like catalysis based
on Mn3O4 loading for degradation of methylene
blue with water transfer and separation channel of fir wood (the interfacial
area was estimated up to 6 × 104 m2/m3) to solve the low separating efficiency and fouling problem.
The results show that the wood matrix treated by hydrothermal carbonization
loading with Mn3O4 nanoparticles (Mn3O4/TiO2/wood) exhibited remarkable catalytic
efficiency on methylene blue (MB) moles degradation and the fouling
problem could be significantly alleviated during Fenton-like catalysis.
The turnover frequency of the wood matrix is 6.072 × 10–3 molMB·molMn3O4
–1·min–1, which is much higher
than the values reported in the literature. The flux maintained approached
2045 L·m–2·h–1 with
a high rejection rate of more than 95%. Wood with natural interconnected
micropores as the main fluid transfer and microreaction channels is
a promising material for construction of parallel-series microreactors,
to apply to some vital chemical process besides sewage purification
and desalination.
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