Insights from the molecular-level mechanism of sorption of organophosphate esters (OPEs) on carbon nanotubes (CNTs) can further our understanding of the fate and transport of OPEs in the environment. The motivation for our study was to explore the sorption process of OPEs on multi-walled CNTs (MWCNTs), single-walled CNTs (SWCNTs) and their oxidized counterparts (O-MWCNTs and O-SWCNTs), and its ...

The sorption of two dyes, namely, Basic BIue 69 and Acid Bhre 25 onto peat has been studied in terms of pseudo-second order and first order mechanisms for chemical sorption as vrell as an intraparticle diffusion mechani!jm process. The batch sorption process, based on the assumption of a pseudo-second order mechanism, has been developed to predict the rite constant of sorption. the equ~lib~um c...

Transport of liquids by pervaporation takes place by a solution-diffusion mechanism. In order to investigate the “solution part” of this transport model, preferential sorption has been compared with preferential permeability. Sorption equilibria and pervaporation experiments for the systems water-ethanol-cellulose acetate, water-ethanol-polyacrylonitrile and water-ethanol-polysulfone have been ...

On the basis of OCED Guideline 106, batch sorption studies were employed to reveal sorption of atrazine by amending biochar in tropical soils, namely, laterite, paddy soil and dry red soil. Biochar,a micro-porosity and great surface product, was generated by pyrolysis of manioc wastes at 750°C(BC750) and modified substances(MC750) were produced by loading Fe. The mechanism of sorption was exami...

the aim of this study was to investigate the congo red sorption on soil from the region of iasi (ne of romania). the effects of contact time, temperature, sorbent dose and initial dye concentration on soi sorption were investigated. the results show that the amount adsorbed of congo red on soil increase with increasing dye concentration, temperature and contact time. the experimental data were ...

Batch sorption isotherms of 1,3,5-trichlorobenzene, 1,3,5-trinitrobenzene, and tetracycline to organic-free montmorillonites and soils receiving heat treatment (375°C for 24 h) were compared with those to unheated sorbents. Sorption of the nonpolar 1,3,5-trichlorobenzene to soil was lowered after the removal of humus by heating, consistent with the mechanism of hydrophobic partition into organi...

Batch studies of cadmium sorption by almond peel were carried out to identify the main rate controlling steps in the overall uptake mechanism, using a single external mass transfer diffusion model and intraparticle mass transfer diffusion model. The classical parameters influencing cadmium sorption mechanisms such as: initial cadmium concentration, particle size, agitation speed, temperature, a...

Batch studies of acid dyes sorption by orange peel were carried out to identify the main rate controlling steps in the overall uptake mechanism, using a single external mass transfer diffusion model and intraparticle mass transfer diffusion model. Certain classical parameters influencing dyes sorption mechanisms namely: initial acid dyes concentration and dye type were investigated. The approac...

Batch studies of cadmium ion sorption by dried sunflower leaves were carried out to identify the main rate controlling steps in the overall uptake mechanism, using a single external mass transfer diffusion model and intraparticle mass transfer diffusion model. Many classical parameters influencing cadmium sorption mechanisms namely: initial cadmium concentration, agitation speed, initial soluti...