Biodegradability of branched alkylbenzene sulphonates

Abstract

Abstract Branched alkylbenzene sulphonates (ABS) widely used surfactants in the 1950s and early 1960s were subsequently replaced by linear forms in response to evidence that the former are recalcitrant. Though banned in most countries, the use of branched ABS is still widespread in developing countries. In addition to being recalcitrant, they are xenobiotic and, in nature, the biodegradation process of these surfactants requires a lengthy period. This review elaborates the available information on the biodegradation of the branched ABS in relation to their chemical stability, degradation processes, stages of acclimatisation and the microorganisms involved.