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首页> 外文会议>World Conference on Detergents: Strategies for the 21st Century held 4-8 October 1998 in Montreux, Switzerland. >An Environmental Risk Assessment of the Biodegradation Intermediates of Nonylphenol Ethoxylates
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An Environmental Risk Assessment of the Biodegradation Intermediates of Nonylphenol Ethoxylates

机译：壬基酚乙氧基化物生物降解中间体的环境风险评估

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摘要

We examined the potential environmental risks of the biodegradation intermediates of nonylphenol ethoxylates (NPE). Aerobic biodegradation of NPE (such as NPE9) during sewage treatment and in surface waters typically results in the formation of several intermediates, including one- and two-mol NPE (NPE1, NPE2) and ether carboxylates of NPE (NPEC1, NPEC2). Small amounts of nonylphenol (NP) can be formed in anaerobic sections of sewers. NPE biodegrades easily by cleavage of successive ethyoxylate groups. Degradation studies of NPE1, NPE2, NPEC1, NPEC2, and NP have shown them to be inherently biodegradable in OECD method 301B and 301F tests. Recent studies showed cleavge of the phenolic ring. Concentrations of various NPE biodegradation intermediates (mainly NP and low-mol NPE) in U.S., Canadian, and European surface waters are routinely <1 ppb. Higher concentrations are associated with the discharge of untreated or poorly treated effluents.
机译：我们研究了壬基酚乙氧基化物（NPE）生物降解中间体的潜在环境风险。 NPE（例如NPE9）在污水处理过程和地表水中的好氧生物降解通常会导致形成多种中间体，包括一摩尔和两摩尔NPE（NPE1，NPE2）和NPE的醚羧酸盐（NPEC1，NPEC2）。下水道的厌氧区会形成少量壬基酚（NP）。 NPE可通过裂解连续的乙氧基化物基团轻松进行生物降解。 NPE1，NPE2，NPEC1，NPEC2和NP的降解研究表明，它们在OECD方法301B和301F测试中具有固有的生物降解性。最近的研究表明酚环的裂解。在美国，加拿大和欧洲的地表水中，各种NPE生物降解中间体（主要是NP和低分子NPE）的浓度通常小于1 ppb。较高的浓度与未处理或处理不良的废水的排放有关。

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