5,197 research outputs found
Detection of imidacloprid and Bisphenol-S by Solid Phase Extraction (SPE) coupled with UV-VIS spectrometer and LC-MS
Study on the sorption–desorption–regeneration performance of Ca-, Mg- and CaMg-based layered double hydroxides for removing phosphate from water
Preliminary toxicity assessment of pharmaceutical solutions with and without ferrate treatment
Comparative performance of catalytic Fenton oxidation with zero-valent iron (Fe(0)) in comparison with ferrous sulphate for the removal of micropollutants
This research aims to depict the comparative performance of micropollutants’ removal by FeSO4- and zero-valent iron (Fe(0))-catalytic Fenton oxidation and to explore the possibilities of minimising the sludge production from the process. The emerging micropollutants used for the study were gabapentin, sulfamethoxazole, diuron, terbutryn and terbuthylazine. The Taguchi method, which evaluates the signal-to-noise ratio instead of the standard deviation, was used to develop robust experimental conditions. Though both FeSO4- and Fe(0)-catalytic Fenton oxidation were able to completely degrade the stated micropollutants, the Fe(0)-catalytic Fenton process delivered better removal of dissolved organic carbon (DOC; 70%) than FeSO4 catalytic Fenton oxidation (45%). Fe(0)-catalytic Fenton oxidation facilitated heterogeneous treatment functions, which eliminated toxicity from contaminated solution and there was no recognisable sludge production
Reaction kinetics and oxidation products formation in the degradation of ciprofloxacin and ibuprofen by ferrate(VI)
Improving the removal of phosphate in secondary effluent of domestic wastewater treatment plant
Overshoot in biological systems modeled by Markov chains: a nonequilibrium dynamic phenomenon
A number of biological systems can be modeled by Markov chains. Recently,
there has been an increasing concern about when biological systems modeled by
Markov chains will perform a dynamic phenomenon called overshoot. In this
article, we found that the steady-state behavior of the system will have a
great effect on the occurrence of overshoot. We confirmed that overshoot in
general cannot occur in systems which will finally approach an equilibrium
steady state. We further classified overshoot into two types, named as simple
overshoot and oscillating overshoot. We showed that except for extreme cases,
oscillating overshoot will occur if the system is far from equilibrium. All
these results clearly show that overshoot is a nonequilibrium dynamic
phenomenon with energy consumption. In addition, the main result in this
article is validated with real experimental data.Comment: 15 pages, 3 figure
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