THERMAL SEPARATION AND CONCENTRATION METHOD FOR HALOGEN ION IN SALT WATER ACIDIFIED WITH SULFURIC ACIDPURPOSE:To concentrate halogen ions efficiently by filling an aqueous sulfuric acid soln. of salt water contg. alkali metal halide in a thermal separating device then continuously extracting the treated...
Fathead minnows, Pimephales promelas , were exposed for 129 days to Lake Superior water acidified with sulfuric acid by means of a flow-through toxicant injection system. The effects of chronic acid stress (pH 6.5, 6.0, 5.5, 5.0) on gill histology were examined. Most of the histological effe...
The first part of the study compared the addition of polymers (one cationic and one anionic polymer) in natural and acidified conditions by sulfuric acid (H2SO4) through continuous treatment. The flocculation step was conducted in the helical tubular flocculator (HTF), also responsible for ...
Electrolysis of acidified water H+ions are attracted to the cathode , gain electrons and form hydrogen gas.OH-ions are attracted to the anode, lose electrons and form oxygen gas. What are the advantages of electrolysis of water? Water electrolysis is one of the simplest methods used for hydrog...
The product was obtained as a deep red syrup weighing 91.5 grams and was completely miscible with water and with alcohol. When a solution of the product in water was acidified with hydrochloric acid, the diazoimino compound was cleaved and the resulting solution had all of the properties of th...
For full acidification, the as-received membranes were first acidified in 1M nitric acid (60 °C for 2 hours) and subsequently thoroughly rinsed in pure water (60 °C, 2 hours, 2 repetitions). We measured the sorp- tion isotherms (shown in Fig. S1†) to convert the ...
About 250 mL of collected water was filtered through a 0.45 μm membrane and immediately acidified with 70% ultra-pure nitric acid (pH = 2) to prevent any physical changes. A water sample (100 mL) was transferred to an Erlenmeyer vessel containing 2.5 mL of ultra-pure nitric acid ...
In opposite to bottled waters, all tap waters were acidified using nitric acid to pH 2 and held in the original container for minimum 16 h before analysis. Figs. 1-3 present the dependence of gross beta activity of TDS for different methods. A good correlation was found between gross beta...
The sample was acidified to pH 4.3 with 3 mL, 1N sulfuric acid. To the acidified water sample was added 0.3 grams of finely-divided sponge iron and 0.1 gram of finely divided elemental sulfur (no pre-mix of sulfur-modified iron was prepared). The previously-clear mixture turned cloudy. ...
The aqueous phase of experiment 3 was acidified with sulfuric acid to pH 3.0. The phthalic acid was immediately precipitated in crystalline form. After filtration, the water had a COD of 6.0 g/liter. In part of the further experiments, COD values of 2.5 to 3.0 g/liter were even found. ...