The presence of toxic metals in aquatic environments poses serious problems for ecosystems and especially for human health. Numerous types of metal oxides have been used to remove these metals and other toxic organic compounds, using adsorption systems. In this work, CaMoO4 was synthesized via coprecipitation and processed for different periods of time using a microwave-assisted hydrothermal system. It was possible to synthesize CaMoO4 on room temperature without any heat treatment. In addition, small processing times in HTMW were able to produce CM with different morphologies. The effect of the reaction time on the morphology of the product and particle size was examined in SEM images. A plausible CaMO4 formation mechanism was proposed based on time and temperature parameters. The potential application of CaMO4 as an adsorbent in water treatment was also investigated and this material exhibited a favorable adsorption performance in the fast removal of cadmium(ii) ions from aqueous solution of 1 mg L-1 concentration. So, CM showing a promising potential for use in environmental remediation.
Pepper spray is one of the less lethal instruments used by law enforcement agencies around the world.Basically, pepper spray is composed of the active ingredient, a carrier solvent and a propellant. The purpose of pepper spray, a non-lethal weapon, is to brie y incapacitate and restrain an individual, without causing permanent damage. Therefore, the presence of hazardous substances is undesirable. Pepper sprays con scated by the Brazilian federal police were analyzed to identify their ingredients. This analysis indicated several discrepancies between the ndings and product labels, ammable gases (used as propellant), and of greatest concern, methanol ( ammable and highly toxic) as a carrier solvent. Therefore, this investigation revealed the serious risk of low quality pepper spray causing damage to both users and other people subjected to its effects.
Pepper spray is one of the less lethal instruments used by law enforcement agencies around the world. Basically, pepper spray is composed of the active ingredient, a carrier solvent and a propellant. The purpose of pepper spray, a non-lethal weapon, is to briefly incapacitate and restrain an individual, without causing permanent damage. Therefore, the presence of hazardous substances is undesirable. Pepper sprays confiscated by the Brazilian federal police were analyzed to identify their ingredients. This analysis indicated several discrepancies between the findings and product labels, flammable gases (used as propellant), and of greatest concern, methanol (flammable and highly toxic) as a carrier solvent. Therefore, this investigation revealed the serious risk of low quality pepper spray causing damage to both users and other people subjected to its effects.
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