title: Nylon 6 electrospun nanofibers mat as effective sorbent for the removal of estrogens: kinetic and thermodynamic studies.
abstract: Nylon 6 electrospun nanofibers mat was prepared via electrospinning for the removal of three estrogens, namely, diethylstilbestrol (DES), dienestrol (DS), and hexestrol (HEX) from aqueous solution. Static adsorption as well as the dynamic adsorption was evaluated by means of batch and dynamic disk flow mode, respectively. The kinetic study indicated that the adsorption of the target compounds could be well fitted by the pseudo-second-order equation, suggesting the intra-particle/membrane diffusion process as the rate-limiting step of the adsorption process. The adsorption equilibrium data were all fitted well to the Freundlich isotherm models, with a maximum adsorption capacity values in the range of 97.71 to 208.95 mg/g, which can be compared to or moderately higher than other sorbents published in the literatures. The dynamic disk mode studies indicated that the mean removal yields of three model estrogens were over 95% with a notable smaller amount of adsorbent (4 mg). Thermodynamic study revealed that the adsorption process was exothermic and spontaneous in nature. Desorption results showed that the adsorption capacity can remain up to 80% after seven times usage. It was suggested that Nylon 6 electrospun nanofibers mat has great potential as a novel effective sorbent material for estrogens removal.
authors.affiliation: Key Laboratory of Environmental Medicine Engineering, Ministry of Education, School of Public Health, Southeast University, 210009 Nanjing, China.
authors.forename: Fei-Fei
authors.initials: FF
authors.lastname: Qi
authors.affiliation: Key Laboratory of Environmental Medicine Engineering, Ministry of Education, School of Public Health, Southeast University, 210009 Nanjing, China.
authors.forename: Yang
authors.initials: Y
authors.lastname: Cao
authors.affiliation: Zibo Municipal Center for Disease Control and Prevention, 255026 Zibo, China.
authors.forename: Min
authors.initials: M
authors.lastname: Wang
authors.affiliation: Suzhou Key Laboratory of Environment and Biosafety, 215123 Suzhou, China.
authors.forename: Fei
authors.initials: F
authors.lastname: Rong
authors.affiliation: Key Laboratory of Environmental Medicine Engineering, Ministry of Education, School of Public Health, Southeast University, 210009 Nanjing, China ; Suzhou Key Laboratory of Environment and Biosafety, 215123 Suzhou, China.
authors.forename: Qian
authors.initials: Q
authors.lastname: Xu
keywords: Adsorption; Estrogens; Kinetics; Nylon 6 electrospun nanofibers mat; Thermodynamics
references.citation: Analyst. 2011 Dec 7;136(23):5030-7
references.pmid: 21994916
references.citation: Anal Chim Acta. 2011 Nov 7;706(1):25-36
references.pmid: 21995910
references.citation: Environ Pollut. 2012 Jun;165:215-24
references.pmid: 22226508
references.citation: J Hazard Mater. 2009 May 30;164(2-3):820-8
references.pmid: 18848393
references.citation: Chemosphere. 2002 May;47(7):711-6
references.pmid: 12079066
references.citation: Water Res. 2005 Oct;39(16):3991-4003
references.pmid: 16126247
references.citation: J Hazard Mater. 2013 Jan 15;244-245:121-9
references.pmid: 23246947
references.citation: J Hazard Mater. 2011 Feb 15;186(1):458-65
references.pmid: 21130566
references.citation: Appl Microbiol Biotechnol. 2010 May;86(6):1671-92
references.pmid: 20354692
references.citation: J Environ Sci Health A Tox Hazard Subst Environ Eng. 2009 Mar;44(4):354-61
references.pmid: 19184702
references.citation: Analyst. 2011 Jul 21;136(14):2879-89
references.pmid: 21655564
references.citation: J Environ Monit. 2010 Jan;12(1):58-70
references.pmid: 20082000
references.citation: J Hazard Mater. 2007 Mar 6;141(1):37-44
references.pmid: 16890349
references.citation: Environ Sci Technol. 2008 Aug 1;42(15):5480-5
references.pmid: 18754464