Sorption of biodegradation end products of nonylphenol polyethoxylates onto activated sludge

作     者：Nguyen Viet Hung Masafumi Tateda Michihiko Ike Masanori Fujita Shinji Tsunoi Minoru Tanaka 

作者机构：Department of Environmental EngineeringDepartment of Environmental Systems TechnologyDepartment of Environmental EngineeringDepartment of Environmental EngineeringResearch Center for Environmental PreservationResearch Center for Environmental Preservation Graduate School of Engineering Osaka University 2-1 Yamada-oka Suita Osaka 565-0871 Japan College of Technology Toyama Prefectural University 5180 Kurokawa Kosugi Imizu Toyama 939-0398 Japan Graduate School of Engineering Osaka University 2-1 Yamada-oka Suita Osaka 565-0871 Japan Graduate School of Engineering Osaka University 2-1 Yamada-oka Suita Osaka 565-0871 JapanOsaka University 2-4 Yamada-oka Suita Osaka 565-0871 JapanOsaka University 2-4 Yamada-oka Suita Osaka 565-0871 Japan 

出 版 物：《Journal of Environmental Sciences》 (环境科学学报（英文版）)

年 卷 期：2004年第16卷第4期

页      面：564-569页

核心收录：

学科分类：0830[工学-环境科学与工程（可授工学、理学、农学学位）] 083001[工学-环境科学] 08[工学] 

主　　题：activated sludge biodegradation end products endocrine disruptor nonylphenol polyethoxylates sorption 

摘      要：Nonylphenol(NP), nonylphenoxy acetic acid(NP1EC), nonylphenol monoethoxy acetic acid(NP2EC), nonylphenol monoethoxylate(NP1EO) and nonylphenol diethoxylate(NP2EO) are biodegradation end products(BEPs) of nonionic surfactant nonylphenolpolyethoxylates (NPnEO). In this research, sorption of these compounds onto model activated sludge was characterized. Sorption equilibrium experiments showed that NP, NP1EO and NP2EO reached equilibrium in about 12 h, while equilibrium of NP1EC and NP2EC were reached earlier, in about 4 h. In sorption isotherm experiments, obtained equilibrium data at 28℃ fitted well to Freundlich sorption model for all investigated compounds. For NP1EC, in addition to Freundlich, equilibrium data also fitted well to Langmuir model. Linear sorption model was also tried, and equilibrium data of all NP, NP1EO, NP2EO and NP2EC except NP1EC fitted well to this model. Calculated Freundlich coefficient(K F) and linear sorption coefficient(K D) showed that sorption capacity of the investigated compounds were in order NPNP2EONP1EONP1EC≈NP2EC. For NP, NP1EO and NP2EO, high values of calculated K F and K D indicated an easy uptake of these compounds from aqueous phase onto activated sludge. Whereas, NP1EC and NP2EC with low values of K F and K D absorbed weakly to activated sludge and tended to preferably remain in aqueous phase.