Using organoclays to enhance carbon filtration

The removal of phenol from aqueous solutions by adsorption using surfactant-modified bentonite and kaolinite

“…Organic modification of clay minerals has been shown to significantly increase the attenuation of some organic compounds [11][12][13]. To increase the ability of mineral clays to remove nonpolar and anion water pollutants, it is necessary to modify their surfaces.…”

Simultaneous sorption of benzene and heavy metals onto two organoclays

“…This makes organoclays useful in applications where the removal of organic contaminants is of concern. Organoclays have been used in wastewater treatment facilities and military installations to remove chlorinated solvents and oil and grease generated from paint-stripping activities and degreasing operations [4,5]. Recently organoclays were used in a full-scale sediment cap at the McCormick and Baxter Company Superfund site [6].…”

Effect of quaternary ammonium cation loading and pH on heavy metal sorption to Ca bentonite and two organobentonites

“…Depending on the molecular structure of the QAC, sorption of organic solutes occurs by either a partition or adsorption process [2][3][4][5]. Environmental engineering applications of organoclays include their use in compacted earthen landfill liners [6][7][8][9] and slurry walls [10], as a component of geosynthetic clay liners [11,12], as liners for gasoline storage tanks [13][14][15], as a component of sediment caps [16], as a sorbent for sampling airborne organic contaminants [17] and removing oil from wastewater streams [18]. Because of their unique organic solute sorption properties, the interest in applications of organoclays has increased significantly over the last decade.…”