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Wypienianie detergentów w warunkach napowietrzania osadu czynnego

Pazdan P.

Ekotechnika

2002

nr 3

24-25

Problematyka ściekowa w chemii gospodarczej

Gaca J.

Ekologia i Technika

2001

R. 9, nr 6

174-180

Household chemistry comprises many products used for housekeeping. It includes mainly cleaners (for cleaning, washing and disinfecting), cosmetic and perfumery products and plastics. Each from these products is a complex mixture containing many various components. The basic components found in sewages produced by household chemistry are detergents. They are applied in preparations for cleaning and washing, for hygienic and sanitary aims and in many industrial processes e.g. floatating and foam forming agents, emulsifiers, dispergators, moisuring and antielectrostatic agents and others. From the chemical point of view surface-active agents can be devided into four groups: anionic, cationic, non-ionic and amphoteric.

Przebieg ozonowania Tergitolu TMN6 w roztworach wodnych

Perkowski J., Ledakowicz S.

Ochrona Środowiska

2000

nr 4

9-14

The nonionic detergent, Tergitol TMN6, the product of the reaction of 2,6,8-trimethyl-4-nonanol with ethylene oxide, was ozonised in an aqueous solution. The efficiency of Tergitol TMN6 degradation was related to ozone concentration in the gas phase, initial concentration of the detergent and pH. The following analytical techniques were applied: paleography, UV-spectroscopy and COD determination. It was found that for the detergent concentration below critical micelle concentration (CMC) the reaction rate was linearly dependent on O3 concentration, as well as on detergent concentration raised to 1.4 power. For the detergent concentration above the CMC value the reaction rate 3 was slower. The highest rate of ozonation of Tergitol TMN6 brought about a decrease of pH (due to the oxidation of the aliphatic chains to carboxylic acids) and a slaw decrease of COD in the reaction mixture.