posted on 2024-01-30, 04:07authored byXufang Wang, Hongjun Lin, Shengtao Jiang, Siping Ji, Yanbiao Liu
A growing challenge worldwide is
the mitigation and elimination
of micropollutants in natural bodies of water. Standard approaches
for micropollutants removal typically have been energy-intensive and
have required extensive use of chemicals and process operations. Here,
an effective system for treating water is proposed that utilizes the
synergistic action of peroxydisulfate (PDS) and permanganate (PM)
with carbon nanotubes (CNT). Together, the materials were effective
in the degradation of micropollutants, such as phenol, tetracycline
(TC), 4-chlorophenol (4-CP), and bisphenol A (BPA). The combined CNT/PM/PDS
system achieved a 2.97 mmol/(h·m2) BPA oxidation flux
and had a high kinetic constant of 1.456 min–1,
which compared favorably with the fluxes of 0.89, 0.27, 0.82, 1.27,
and 0.81 mmol/(h·m2) and kinetic constants of 0.115,
0.076, 0.220, 0.779, and 0.661 min–1 for PM, PDS,
PM/PDS, CNT/PM, and CNT/PDS, respectively. Investigations of the reaction
mechanism determined that CNT could appreciably enhance the activation
of PDS with Mn(III) and MnO2 generated in situ, thereby significantly enhancing the efficient consumption of both
PM and PDS. The outcomes of this study are dedicated to providing
an efficient, economical approach for water decontamination.