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...
The water samples were collected during 2019 and sampled in two different (PET) bottles: (i) filled with water with the purpose of measuring the concentration of cations, anions, halogen elements, Si, and B; (ii) filled with water acidified with HNO3 acid (1:1) to pH 2 to measure ...
NH4+-N are 0.80–1.50 mg L−1and 0.03–0.61 mg L−1, respectively. The TN concentration in East Tiaoxi River is relatively stable throughout the year, with a high concentration in December and an average concentration of 1.74 mg L−1in the basin (Fig.2a). The variation trend of ...
Acidified <1 Critical <2 Endangered 2-5 Highly Sensitive 10-20 Not Sensitive >20 Alkalinity is closely related to the acid-neutralizing capacity (ANC) of a solution. Often, ANC is incorrectly used to refer to alkalinity. But the acid-neutralizing capacity can refer to the combination ...
The alum (Al2SO4.18H2O) should generally be added to the influent stream in amounts ranging from 100-500 mg/l, preferably 150-300 mg/l. When the carbon/alum mixture is thermally regenerated from the waste sludge, it is generally acidified with sulfuric acid to a pH of 4 or less. ...
Just a few ponds are in the acidified category. This appears to be a natural condition for these lakes. The alkalinity of lakes is proportionally equal to the number of nutrients in them. Meaning, a lower amount of nutrients also means lower alkalinity, while a higher amount of nutrients ...
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...
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 aqueous sodium bicarbonate phase was thenacidified to pH 1 with 7 N sulfuric acid and extracted with ether.The ether solution was dried over ... LP Hager 被引量: 0发表: 0年 Substituted 3,4-polymethylenedioxythiophenes, and polymers and electro responsive devices made therefrom Substituted ...
This sample was treated for removal of arsenic by batch treatment by the method and system of this invention. Starting temperature of the 1,000 mL sample was 60° F. and pH was 8.8. The sample was acidified to pH 4.3 with 3 mL, 1N sulfuric acid. To the acidified water sample was add...