In the present study, a Cameroonian smectite was used as an adsorbent to model adsorption kinetics of three textile dyes (malachite green, methyl red and acid blue 74) from aqueous solution in batch system. The effects pH temperature were evaluated on capacities, times required reach equilibrium mechanisms involved. It can be seen that, although are independent medium, process studied is favour...

The metal-organic framework Ni(2)(dobdc) (CPO-27-Ni, where dobdc = 1,4-dioxido-2,5-benzenedicarboxylate) has been post-synthetically modified with piperazine (pip) - a known 'accelerator' to improve the kinetics of CO(2) uptake in alkanolamine solvents for chemical absorption - and the impact of the modification on the CO(2) uptake and selectivity over N(2) has been probed. While the modified f...

We present the frailtyHL package for fitting semi-parametric frailty models using hlikelihood. This package allows lognormal or gamma frailties for random-effect distribution, and it fits shared or multilevel frailty models for correlated survival data. Functions are provided to format and summarize the frailtyHL results. The estimates of fixed effects and frailty parameters and their standard ...

Physisorption using gas or vapor probe molecules is the most common characterization technique for porous materials. The method provides textural information on adsorbent as well affinity a specific adsorbate, typically through equilibrium pressure measurements. Here, we demonstrate how low-field NMR can be used to measure full adsorption isotherms, and by selectively measuring 1H spins of adso...

Microplastics, which serve as sources and vector transport of organic contaminants in both terrestrial marine environments, are emerging micropollutants increasing concerns due to their potential harmful impacts on the environment, biota human health. Microplastic particles have a higher affinity for hydrophobic high surface area-to-volume ratio, particularly aqueous conditions. However, recent...

This paper is devoted to the textural characterization of nanoporous materials with a focus on hierarchically ordered such as mesoporous zeolites, which exhibit an interconnected pore network consisting micro-, meso-, and often macropores. Hierarchically zeolites have potential improve various industrial applications for instance in areas heterogeneous catalysis, separation, gas, energy storage...