Neutralization of Formaldehyde Gas by Ammonium Bicarbonate and Ammonium Carbonate
نویسنده
چکیده
Formaldehyde gas, generated by the depolymerization of paraformaldehyde and in the presence of water vapor, has been traditionally used for biological decontamination of equipment and spaces utilized for research with a susceptible biological agent. This gas has often been neutralized with ammonia gas, generated by the thermal decomposition of ammonium bicarbonate or ammonium carbonate. An elementary theoretical analysis indicates that for total neutralization the proper weight ratio of commercial ammonium bicarbonate to paraformaldehyde is 1.58, while that for ammonium carbonate to paraformaldehyde is 1.00 to 1.13. These values are supported by experimentation. The ratio for ammonium bicarbonate in particular is 44% greater than that advised in existing literature.
منابع مشابه
Reduction of formaldehyde concentrations in the air and cadaveric tissues by ammonium carbonate.
The reduction of formaldehyde by ammonium carbonate was examined in cadavers and in vitro. Formaldehyde concentrations in the air (10 cm above human cadavers) and in various cadaveric tissues were measured with or without perfusion of ammonium carbonate solution into formaldehyde-fixed cadavers. Air samples were monitored using Kitagawa gas detector tubes. For measurement of formaldehyde in tis...
متن کاملبررسی تأثیر شکل های مختلف نیتروژن و pH محیط ریشه بر رشد گراس Brachiaria brizantha در کشت هایدروپونیک
This study was conducted to evaluate plant response of Brachiaria brizantha cv. MG5 to nitrogen (N) forms and different pH's of nutrient solution. In this study, under controlled conditions in growth chamber with hydroponics culture, seedlings after germination were treated with different N forms as nitrate, ammonium, and ammonium nitrate, as well as with different nutrient solution pH's. A sol...
متن کاملInvestigation on an ammonia supply system for flue gas denitrification of low-speed marine diesel
Low-speed marine diesel flue gas denitrification is in great demand in the ship transport industry. This research proposes an ammonia supply system which can be used for flue gas denitrification of low-speed marine diesel. In this proposed ammonia supply system, ammonium bicarbonate is selected as the ammonia carrier to produce ammonia and carbon dioxide by thermal decomposition. The diesel eng...
متن کاملEvaluation of in vitro bactericidal activity of commercial disinfectants against Lawsonia intracellularis
Materials and methods: Two L intracellularis isolates were tested for susceptibility to several classes of disinfectants, including iodine, a biguanide, phenol, an oxidizing agent, a quaternary ammonium compound (QAC), and the combinations of QACs with aldehydes (formaldehyde and glutaraldehyde). All disinfectants were diluted with simulated hard water by adding 400 or 1000 ppm of calcium carbo...
متن کاملStructure, hydrogen bonding and thermal expansion of ammonium carbonate monohydrate
We have determined the crystal structure of ammonium carbonate monohydrate, (NH4)2CO3·H2O, using Laue single-crystal diffraction methods with pulsed neutron radiation. The crystal is orthorhombic, space group Pnma (Z = 4), with unit-cell dimensions a = 12.047 (3), b = 4.453 (1), c = 11.023 (3) Å and V = 591.3 (3) Å(3) [ρcalc = 1281.8 (7) kg m(-3)] at 10 K. The single-crystal data collected at 1...
متن کامل