The investigation of copper-based impregnated activated carbons prepared from water-soluble materials for broad spectrum respirator applications

Investigation of copper oxide impregnants prepared from various precursors for respirator carbons

“…It is known that when Cu 2+ is used to adsorb HCN, additional materials containing chromium, molybdenum or tungsten must be added to capture the NCCN gas [6,7,18,24]. Work involving the addition of molybdenum and tungsten compounds to CuO-based IAC samples similar to those discussed here has been reported in recent publications [25,26].…”

Removal of chlorine gas by an amine functionalized metal–organic framework via electrophilic aromatic substitution

“…Current gas mask technologies typically use an activated carbon impregnated with metal salts, acids, and amines for the filtration of a broad range of toxic chemicals. 2,3 One shortcoming of impregnated, activated carbons is that over time the various impregnants have a tendency to react with one another, rendering them ineffective against the chemical threats for which they were designed to protect. 4 Thus, nanomaterials with bound functional groups are ideal for the removal of chemical threats avoiding deleterious effects.…”

The effect of co-impregnated acids on the performance of Zn-based broad spectrum respirator carbons

“…3c. HNO 3 treatments have been shown to improve adsorption and distribution of metals on AC substrates [12,17,18,21]. In previous work, our group has demonstrated that well distributed, small grain size impregnant has optimal gas adsorption capacity [6,7,12,21,32].…”

“…Activated carbons can also be used as a support for impregnated chemicals capable of chemically adsorbing certain irritating or toxic gases from contaminated air streams; these materials are known as impregnated activated carbons (IACs) [5][6][7][8]. IACs capable of adsorbing a wide variety of gases from airstreams have been reported in the literature [9][10][11][12][13]. These materials have been used as the active layer in gas mask cartridges for many years [10,13].…”