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The World of Protozoa, Rotifera, Nematoda and Oligochaeta

Ref ID : 1133

Itoh Shin-ichi, Setsuda Setsuko, Utsunomiya Akiko, and Naito Syoji; [Studies on the biodegradation test method of chemical substances II. Ultimate biodegradabilities of some anionic, nonionic, and cationic surfactants estimated by CO2 production]. Yukagaku 3:199-204, 1979

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The ultimate biodegradabilities of ten anionic, three cationic and five nonionic surfactants, were studied. As test surfactants, sodium linear alkylbenzensulfonates (LAS), sodium alkyl sulfates (AS), sodium alkylpoly(oxyethlene)sulfates (AES), sodium alpha-olefinsulfonate (AOS), sodium N-acyl-L-glutamate (LG), sodium salt of fatty acid (Soap), alkyltrimethylammonium chloide (ATM), dialkyldimethylammonium chloride (ADM), Alkylbenzyldimethylammonium chloride (ABDM), alkyl poly(oxyethylyene)ether (LPE), p-alkylphenyl poly(oxyethlene)ether (NPE), N,N-bis(2-hydroxyethyl)alkanamide (LDEA), poly(oxyethylene)ester of fatty acid (PAE) and N,N,-bis[poly(oxyethylene)alkaylamine (PEA) were used, and glucose was served as readily biodegradable control in each test set. The test solutions were incubated at 27 degrees C under an aerobic condition. The rate and degree of biodegradation in the 10-day test period were followed by measuring CO2 production, total organic carbon (TOC), methylene blue active substances (MBAS) for anionics and iodobismuthate active substances (BIAS) for nonionics. The results of the comparative biodegradabilities of the surfactants, estimated by biodegradation index, were as follows; (AS, LG) > Soap > (AES, AOS, PAE) > LDEA > LPE > LAS >> (NPE, PEA, ATM, ADM, ABDM).