the aim of the present work is to prepare an adsorption package to simulate adsorption / desorption operation for both single and multi-component systems in an isothermal condition by different mechanisms such as; local adsorption theory and mass transfer resistance (rigorous and approximated methods). different mass transfer resistance mechanisms of pore, solid and bidispersed diffusion, toget...

Certain events settle themselves in the collective memory of humankind where they keep functioning for decades as points of reference for future generations. The announcement of the successful cloning of Dolly was such an event. Every one of us will remember this thought-provoking occasion or will, at least, be confronted with the extended media coverage of this breakthrough in medical science....

The present study was designed to evaluate the effects of reduced sulfur species on the adsorption of perchlorate on tailored granular activated carbon (TGAC); initial experiments focused on thiosulfate. Previous studies using Rapid Small Scale Column tests (RSSCT) showed that perchlorate broke through at 30,000-35,000 bed volumes (BV) when quaternary ammonium surfactants were preloaded onto ac...

the potential of six economically cheap agricultural waste materials, viz. rice husk, betel nutpeels, sugarcane molasses, tea waste, mustard oil cake and saw dust, was investigated for copper and leadremoval from aqueous solutions under batch and continuous conditions. the effect of ph, contact time,sorbent dose and initial metal ion concentration on the uptake of copper and lead was first exam...

PHWAT is a new model that couples a geochemical reaction model (PHREEQC-2) with a density-dependent groundwater flow and solute transport model (SEAWAT) using the split-operator approach. PHWAT was developed to simulate multi-component reactive transport in variable density groundwater flow. Fluid density in PHWAT depends not on only the concentration of a single species as in SEAWAT, but also ...

This paper deals with data reconstruction problem for a real disturbed soil-column experiment using an optimal perturbation regularization algorithm. A purpose of doing the experiment is to simulate and study transport behaviors of Ca2 , Na , Mg2 , K , SO 2− 4 , NO − 3 , HCO − 3 , and Cl − when they vertically penetrating through sandy soils. By data analysis to breakthrough data of the eight k...