Study on Impact Factors of Affecting Liquid-liquid Extraction Efficiency of 12 Nonylphenol Isomers

Shi-yu WANG; Fei LIU; Wen-yong WU; Shi-yang YIN; Yu-long LIU; Liang CHEN; Wei ZHANG; Hui-hui CHEN

Rock and Mineral Analysis > 2014 > 33(4): 570-577.

Shi-yu WANG, Fei LIU, Wen-yong WU, Shi-yang YIN, Yu-long LIU, Liang CHEN, Wei ZHANG, Hui-hui CHEN. Study on Impact Factors of Affecting Liquid-liquid Extraction Efficiency of 12 Nonylphenol Isomers[J]. Rock and Mineral Analysis, 2014, 33(4): 570-577.

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Study on Impact Factors of Affecting Liquid-liquid Extraction Efficiency of 12 Nonylphenol Isomers

1.
Beijing Key Laboratory of Water Resources and Environmental Engineering, China University of Geosciences (Beijing), Beijing 100083, China
2.
Beijing Water Science and Technology Institute, Beijing 100048, China
3.
Research Institute of Safety and Environment Technology, China National Petroleum Corporation, Beijing 102206, China
4.
State Key Laboratory of Hydra Lic Engineering Sim Lation and Safety, Tianjin University, Tianjin 300072, China
5.
Hebei Yuhuan Environmental Science and Technology Co., LTD, Shijiazhuang 050000, China

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Received Date: August 27, 2013
Revised Date: January 01, 2014
Accepted Date: April 08, 2014
Published Date: June 30, 2014

Abstract

ABSTRACT

Nonylphenol(NP) which has a strong estrogenic effect, is an emerging persistent organic pollutant (POPs). In recent years, NP has caused widespread attention for its pollution in water at home and abroad. Hence, the extraction of NP in water samples is particularly important. However, the study about extraction efficiency of NP was aimed at the total amount, and single isomers were seldom studied. Liquid-liquid extraction, as the most traditional and easiest method for NP's extraction, was chosen in this study for its simple and cheap equipment. Factors which affect the extraction efficiency of 12 NP isomers were studied by Gas Chromatography-Mass Spectrometry (GC-MS). To improve the extraction efficiency of NP, factors such as the type and dosage of extraction solvent, dosage of NaCl and sample's pH were optimized. Results show that the extraction efficiency of 12 isomers was highest when 60 mL methylene chloride was selected as the extraction agent, and pH<1 and 60 g NaCl was added in the water samples. The extraction rates for 12 NP isomers were in the range 88.7%-101.2% with RSDs (n=3) of 10.3%-13.6% and detection limits of 9.0-41.4 ng/L. The optimized method for 12 NP isomers can achieve an expected extraction effect within 70%-130% by USEPA, and has been used successfully for the extraction of NP in water samples.
- nonylphenol isomers,
- liquid-liquid extraction,
- extraction efficiency,
- influence factor

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