Hg0 oxidative absorption by K2S2O8 solution catalyzed by Ag+ and Cu2+

Simultaneous removal of SO2, NO and Hg0 by wet scrubbing using urea + KMnO4 solution

“…So, most of the researchers have focused on the oxidation technology, and wish to efficiently remove Hg 0 , SO 2 and NO simultaneously in the WFGD. The most commonly used oxidants include K 2 S 2 O 8 [17], KMnO 4 [18,19], Fenton's reagent [20,21], NaClO 2 [12,22], O 3 [5], H 2 O 2 [23,24], ClO 2 [25] and so on.…”

Mercury Removal from Aqueous Solution by Mixed Mineral Systems II. The Role of Solution Composition and Ageing

“…For Hg0 removal in liquid phase, the key point is to convert Hg0 to Hg2+ rapidly, the latter being easily dissolved in water as reported in literature [25][26][27]. The removal of mercury from contaminated water bodies is controlled by the solution composition and ageing [ 28,29].…”

Chloride Ion Removal from the Wet Flue Gas Desulfurization and Denitrification Wastewater Using Friedel’s Salt Precipitation Method

“…Higher NaAlO 2 dosage is not conducive to the Cl − removal. Addition of excess NaAlO 2 results in increasing Al(OH) 4 − and OH − ions ( (2) and (3) (6) and (7)) in the solid solution formation, thus increasing the fraction of Ca 3 Al 2 (OH) 12 and Figure 2 shows the e ect of Ca(OH) 2 dosage on Cl − removal. When the Al/Cl was 1 : 1, the Ca(OH) 2 dosage had little e ect on Cl − removal.…”

“…Examination of the samples indicates the presence of mixed phases, the major crystalline phases are Ca 4 (4), (5) and (6)). However, higher Ca(OH) 2 dosage contributes to the OH − concentration increase in solution and promote the progress of the reactions ( (7) and (8) When the Ca/Cl was constant at 6 : 1 and the Al/Cl was more than 3 :1, the intensities of characteristic di raction peaks of Ca 4 Al 2 Cl 2 (OH) 12 , Ca 4 Al 2 (OH) 14 , and Ca(OH) 2 all decreased rapidly with the increasing NaAlO 2 dosage; however, the intensities of characteristic di raction peaks of Ca 3 Al 2 (OH) 12 increased rapidly as the NaAlO 2 dosage increased.…”

“…e main principle of the technology is through adding an oxidizing agent to the WFGD system to achieve synergistic removal of multipollutants from the flue gas. Ozone [2], chlorine dioxide [3], potassium persulfate [4], potassium permanganate [5], sodium chlorite [6,7], and other oxidizing agents [8], have all been tested for multipollutants control, among which sodium chlorite (NaClO 2 ) has been shown to be one of the best-performing additives [7]. Industrial demonstration of the technology in which NaClO 2 is used as an oxidant has been completed in China's industrial boilers and furnaces, and multipollutant removal efficiencies are satisfactory.…”