Abstract The objective of this study was to investigate a simple and less expensive process for the removal sulfate from Iranian Chemical Industries Investment Company' wastewater using ettringite (a calcium aluminum (Ca 6 Al 2 (SO 4 ) 3 (OH) 12 .26H O)) precipitation process. optimum experimental conditions Al(OH) recovery were determined batch experiments. Using Ca(OH) allowed achieve pH (pH ...

The corrosion study of aluminum-based materials is the topic a great scientific attention because increasing applications in many sectors these materials. fluoride ions (F−) effect on behavior pure aluminum deaerated 0.05 M sulfuric acid (H2SO4) solutions at 25 °C was investigated. electrochemical measurements such as open circuit potential and potentiodynamic polarization were accomplished to ...

the vase life of cut flowers prolong by some compounds, which can improve their hormonal regulation and water relations or reduce microbial growth in xylem tissu. the effect of chemical treatments on vase life longevity of rose 'ilona'. a randomized complete block design with three replications conducted with following the treatments of control, sts , nickel sulfate, cobalt chloride, ...

In this study, the adsorption and/or desorption capacity of tungsten ions using nickel–aluminum complex hydroxides was assessed. Nickel–aluminum at various molar ratios, such as NA11 were prepared, and evaluated. Precisely, effect temperature, contact time, pH, coexistence on in water layer demonstrated. Among onto highest all adsorbents. The sulfate interlayer exchanged to ions, that is, mecha...

Inorganic aluminum ions, [Al(H2O)6]3+, [Al(OH)(H2O)5]2+, and [Al(OH)2(H2O)4]+, are toxic to a number of crops. The aim of this study was to estimate the danger of soil contamination of bioavailable aluminum and heavy metals forms because of alum sludge which was a by-product of water, and wastewater treatment technology using aluminum coagulant is introduced into the soil. Aluminum and selected...

The IgE production was compared in the presence and absence of aluminum hydroxide gel (alum). Without alum, the IgE production was induced within a suitable range of the antigen dosage; however, alum enhanced it. Alum did not affect the minimum requirement for the antigen dosage, indicating that alum may not take part in the efficiency of antigen presentation.