The separation and recycling of effective resources in Fischer-Tropsch wax residue (FTWR) are urgent because the environmental hazards energy waste they bring. In this study, organic solvents used to separate recyclable from FTWR efficiently, achieving goals “Energy Recycle” “Fisher-Tropsch Wax Residue Treatment”. response surface methodology (RSM) analysis model accurately evaluates relationsh...

Aims. Solid O2 has been proposed as a possible reservoir for molecular oxygen in dense clouds through freeze-out processes. The aim of this work is to characterize quantitatively the physical processes that are involved in the desorption kinetics of CO–O2 ices by interpreting laboratory temperature programmed desorption (TPD) data. This information is used to simulate the behavior of CO–O2 ices...

This study reports the recovery of Pd(II) from acid solution by a polyethylenimine (PEI)-crosslinked chitin (PEI-chitin) biosorbent. FE-SEM analysis demonstrated that there are many slot-like pores on PEI-chitin. The N2 adsorption–desorption experiment revealed average pore size was 47.12 nm. Elemental verified successful crosslinking PEI with raw chitin. Langmuir model better explained isother...

Acetaminophen is a widely used drug worldwide and frequently detected in water wastewater as high-priority trace pollutant. This study investigated the applicability of adsorption processes using composite magnetic chitosan multi-walled carbon nanotubes (MCS@MWCNTs) an adsorbent treatment acetaminophen. The model was well fitted to actual data, correlation coefficients R2 adjusted were 0.9270 0...

This study investigated the effect of temperature, different concentrations of sodium carbonate,and the dose of organic solvent on the desorption of Reactive Red 198 dye from dye-saturated activated carbon using batch and continuous systems. The results of the batch desorption test showed 60% acetone in water as the optimum amount. However, when the concentration of sodium carbonate was raised,...

adsorption of anilofos was studied in four soils (topsoil from alfisol, inceptisol, oxisol and vertisol). the order of adsorption of anilofos was vertisol > oxisol > alfisol > inceptisol. the soil sorption coefficient k and the soil organic carbon sorption coefficient koc are the basic parameters used for describing the environmental fate of the herbicides. in top soil the calculated k values w...

CO2 sorption–desorption cycles with a methyldiethanolamine (MDEA)/piperazine (PZ) blend have been performed rotoevaporator. Similar to other separation technologies, the heating involved in MDEA/PZ solvent regeneration is most energy-intensive step overall process. Thus, this study investigated desorption kinetics under low-pressure (<200 mbar) and low-temperature conditions range from 308 3...

Sorption hypotheses and models are required for the prediction of 137Cs migration in soils contaminated after nuclear reactor accidents weapons tests. In assessment models, Kd (distribution coefficient) hypothesis sorption, which assumes that sorption is instantaneous, linear reversible, has often been coupled with convection-diffusion equation (CDE) to model migration. However, it fails descri...

Molecular dynamics (MD) calculations have been performed to study the ultraviolet (UV) photodissociation of D(2)O in an amorphous D(2)O ice surface at 10, 20, 60, and 90 K, in order to investigate the influence of isotope effects on the photodesorption processes. As for H(2)O, the main processes after UV photodissociation are trapping and desorption of either fragments or D(2)O molecules. Trapp...