[Water purification from ethylene glycol by catalytic oxidation using hydrogen peroxide].
In order to select the method of water regeneration from air moisture condensate in a manned enclosed environment, the procedure of water decontamination from ethylene glycol was investigated. The process developed at t 20-22 degrees C and the following concentrations of C2H6O2 = 0.0125-0.5 mole/l, H2O2 = 1-5 mole/l, and catalyst = 1.7-50% wt. In the presence of 6.67 g/l of homogeneous catalyst FeSO4.7H2O, destructive oxidation of ethylene glycol to yield CO2 in the system 0.1 M C2H6O2 + 1M H2O2 proceeded effectively. However, the iron concentration in the decontaminated water exceeded significantly the maximally allowable concentration of iron in potable water as well as in industrial and non-industrial sewage. Heterogeneous MnO- and PbO-based catalysts provided no more than 20% ethylene glycol oxidation. Siderite, a natural mineral containing 33% wt. Fe2+, proved a more effective catalyst of ethylene glycol oxidation. When ethylene glycol and hydrogen peroxide were used at ratios of 1:30 and 1:80 with 5% wt. siderite, the degree of C2H6O2 to CO2 conversion was 99.2% and 99.8, respectively.
Vasilenko
I I
II
Fedosova
A N
AN
Siniak
Iu E
IuE
D000337:Aerospace Medicine / Q000379:methods / Q000592:standards*; D002384:Catalysis / Q000187:drug effects; D003666:Decontamination / Q000379:methods; D018504:Ecological Systems, Closed; D019855:Ethylene Glycol; D005026:Ethylene Glycols / Q000302:isolation & purification*; D006801:Humans; D006861:Hydrogen Peroxide / Q000494:pharmacology*; D007501:Iron / Q000009:adverse effects / Q000032:analysis; D007854:Lead / Q000494:pharmacology; D008345:Manganese / Q000494:pharmacology; D017895:Manganese Compounds; D008452:Maximum Allowable Concentration; D010087:Oxides / Q000494:pharmacology; D013026:Space Flight; D014586:USSR; D014874:Water Pollutants, Chemical / Q000302:isolation & purification*; D014881:Water Supply / Q000032:analysis / Q000592:standards*
D005026:Ethylene Glycols; D017895:Manganese Compounds; D010087:Oxides; D014874:Water Pollutants, Chemical; D007854:Lead; D008345:Manganese; C047365:lead oxide; C027424:manganese oxide; D006861:Hydrogen Peroxide; D007501:Iron; D019855:Ethylene Glycol
Ochistka vody ot étilenglikolia kataliticheskim okisleniem peroksidom vodoroda.