The morphology of nano gamma alumina affects the molecule adsorption-desorption phenomena. In this case, manipulating surface area, pore volume, and size by technique preparation to control textural properties alumina. Washing synthesized boehmite gel with methanol has a significant effect. co-precipitation method was used prepare alumina, which is involved adding drop-by-drop ammonium hydroxid...

Swimming pool water treatment in general includes flocculation, sand filtration and subsequent disinfection. Chlorite, chlorate and bromate are disinfection by-products of swimming pool water treated by chlorine species or ozone. They are responsible for adverse effects on human health and their analyses in swimming pool water are necessary. The simply and fast suppressed ion chromatography sim...

To quantify ground water denitrification in discrete locations of riparian aquifers, we modified and evaluated an in situ method based on conservative tracers and 15N-enriched nitrate. Ground water was "pushed" (i.e., injected) into a mini-piezometer and then "pulled" (i.e., extracted) from the same mini-piezometer after an incubation period. This push-pull method was applied in replicate mini-...

background: bromide is found naturally in groundwater and surface water. the rapid growth of industrial activities, drainage of surface runoff, and use of methyl bromide in pesticides has increased bromide discharge to the environment. disinfection of water-containing bromide causes the creation of additional products of organo-halogenated that are considered cancer-causing agents. in this stud...

This paper describes the separation and detection of five inorganic anions (I - , BrO3 NO2 Br NO3 -) by capillary ion chromatography using 1-alkyl-3-methylimidazolium-coated columns UV at 210 nm. The salts imidazolium (IM) ions (C2-, C4-, C6-, C8-, C10-, C18-IMs) are a family ionic liquids were newly examined as permanent coating reagents on triacontyl (C30) -bonded silica reversed phase column...

Condensation and cyclization of 5-hydroxy- 1,2,4- thiadiazol-2-yl hydrazine 1 with pyruvic acid, phenacyl bromide, propargyl bromide and ally1 bromide afforded compounds 2,5,7 3, 4 ,6 and 8 respectively, Reaction of 1 with epichforohydrine afforded 4-hydroxy-N-[5-hydroxy- 1 ,3,4-thiadiazoly1] pyrazolidine 9