Abstract For the ternary systems, Rb 2 SO 4 – CaSO H O and Cs O, solubility data have been determined at ambient temperatures (22 25 °C). In both gypsum is found as stable -phase in presence of low alkali metal sulfate concentrations. addition, two double salts exist Rb-system: Rb-disalt (Rb ·2CaSO ) Rb-syngenite ·CaSO ·H O) addition to . Rb-syngenite, crystal structure was by single analysis (...

The present study examines the influence of Ca2+ as (CaSO4), dissolved organic carbon (DOC) and pH on chronic water-borne lead (Pb) toxicity to the larval fathead minnow (Pimephales promelas) under flow-through conditions. The 30 day LC50 for low hardness basic test water (19 mg CaCO3 L(-1)) was 39 (range: 27-51) microg dissolved Pb L(-1) and was greatly increased by increasing concentrations o...

Abstract The introduction of a -NO 2 substituent in o -aminophenol would create an open-unit polymer suitable for different applications. We report the synthesis poly(5-nitro-2-aminophenol) by aniline-catalyzed oxidative polymerization. structure was intensively characterized spectroscopic techniques, elemental analysis, cyclic voltammetry, electrical conductivity and microscopic measurements s...

The contamination of ecosystems in areas around waste dumps is a major threat to the health surrounding populations. aim this study understand contribution Hulene-B dump (Maputo, Mozambique) edible plants, rhizosphere soils, stream waters, and groundwater, assess human risk. Soil plant samples were analyzed by XRD XRF for mineralogical chemical composition characterization, respectively. Minera...