The interaction of dextrin and guar gum with pyrite has been investigated through adsorption, flotation, and electrokinetic measurements. The adsorption densities of the polysaccharides onto pyrite reveal a region of higher adsorption density in the pH range 7.5-11, with a maximum around pH 10 for both polymers. The isotherms exhibit Langmuirian behavior. The adsorption density of guar gum onto...

During the last decade, the expansion of urbanization and industrial activities caused serious environmental problems such as soil pollution. Novel technologies are required to remediate soil contamination with toxic contaminants, including heavy metals and organic pollutants. In recent years, there have been increasing attempts to improve soil remediation efficiency. Electrokinetic (EK) is an ...

use of electrokinetic technique for remediation of contaminated soils has recently been highly attended to, but there are still concerns regarding the effect of this process on soil microbial activity. in this study, changes in concentration of heavy metals extractable through 4n nitric acid, microbial biomass-c, and microbial coefficient, following electrokinetic remediation of a native soil c...

mtbe (methyl tertiary-butyl ether) is an oxygenated organic matter which is widely used nowadays in some countries in unleaded gasoline. mtbe is a toxic substance which is absorbed quickly on water and soil and is one of the most important pollutants in soils and groundwater resources. in order to remove mtbe from the soil, using different experimental methods, determining reliable methods for ...

Trapping nanoscopic objects to observe their dynamic behaviour for extended periods of time is an ongoing quest. Particularly, sub-100nm transparent objects are hard to catch and most techniques rely on immobilisation or transient diffusion through a confocal laser focus. We present an Anti-Brownian ELectrokinetic trap (pioneered by A. E. Cohen and W. E. Moerner ) to hold nanoparticles and indi...

We have applied particle tracking techniques to obtain spatially resolved velocity measurements in electrokinetic flow devices. Both micrometer-resolution particle image velocimetry (micro-PMV) and particle tracking velocimetry (PTV) techniques have been used to quantify and study flow phenomena in electrokinetic systems applicable to microfluidic bioanalytical devices. To make the flow measure...

Electrokinetic soil remediation is often impeded by the aggregation of small particles, within soil, during procedure. The porous network subsequently clogged which results in immediate process termination. In order to overcome this limitation, feasibility electrokinetic coupled simultaneously with two enhancing techniques was investigated: modified periodic polarity reversal and catholyte pH c...