Anaerobic degradation behavior of nonylphenol polyethoxylates in sludge

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• 作者：Jian Lu ; Qiang Jin ; Yiliang He ; Jun Wu ; Wenying Zhang ; Juan Zhao
• 关键词：Nonylphenol polyethoxylates ; Terminal electron acceptor ; Organic matter ; Temperature coefficient ; Initial concentration ; Estrogenic activity
• 刊名：Chemosphere
• 出版年：2008
• 出版时间：March 2008
• 年：2008
• 卷：71
• 期：2
• 页码：345-351
• 全文大小：280 K

文摘

Anaerobic biodegradation behavior of nonylphenol polyethoxylates (NPEOs) was investigated. Results showed that terminal electron acceptors, organic matters, initial concentration, and temperature had great influence on the anaerobic biodegradation of NPEOs. Anaerobic biodegradation of NPEOs could be enhanced by adding sulfate or nitrate while this process could be inhibited by adding organic matters. The maximum removal rate increased 1.24 μM d⁻¹ for each ten micromoles increase in initial concentration. The decrease in temperature caused a sharp decrease in the removal efficiency of NPEOs. The temperature coefficient (Ф) for the anaerobic biodegradation of NPEOs was 0.01 °C⁻¹. Nonylphenol (NP), the typical intermediate of NPEOs, could inhibit the anaerobic biodegradation of NPEOs only at high concentration. However, these environmental factors had no effect on the anaerobic biodegradation pathway of NPEOs. The accumulation of NP and short-chain NPEOs during NPEO biodegradation led to a significant increase in the estrogenic activity during the biodegradation period.