Linear alkylbenzenesulfonates (LAS) in rivers of eastern Austria

Linear alkylbenzene sulfonates (LAS) are washing-active substances found in detergents, rinses, detergents and shampoos. Of all the abiotic substances, they are most common in the aquatic environment. In Austria, an environmental quality standard (Quality Target Ordinance Chemistry Surface Waters) has been in force for these substances in surface waters since 2006. If the levels of LAS in smaller rivers often exceeded this environmental quality standard of 270 μg/L in 1994, only a maximum of 23 μg/L could be detected in the 2010 analysis. Since 1994, several regulations have been adopted at European level on detergents. The reasons for the decrease in LAS concentrations are consistent compliance with environmental standards for detergents, detergents, detergents and fabric softeners, as well as investments in connection with wastewater treatment plants.直链烷基苯磺酸盐（Linear alkylbenzene sulfonates，LAS）是存在于洗涤剂、冲洗剂、清洁剂及洗发产品中的洗涤活性物质。在各类非生物物质中，该类物质在水生环境中的分布最为普遍。在奥地利，针对地表水中的这类物质，环境质量标准（即《化学物质地表水环境质量目标条例》，Quality Target Ordinance Chemistry Surface Waters）自2006年起正式施行。1994年，小型河流中的LAS浓度常超出这一270 μg/L的环境质量标准，但在2010年的检测分析中，其最高检出浓度仅为23 μg/L。自1994年起，欧洲层面已针对洗涤剂出台多项法规。LAS浓度下降的原因，在于洗涤剂、清洁剂及织物柔顺剂等产品均严格遵循环境标准，以及对污水处理厂的配套投资。