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231224s2013 xx |||||o 00| ||eng c |
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7 |
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|a 10.2166/wst.2013.438
|2 doi
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|a pubmed25n0774.xml
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|a (NLM)24185073
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|a DE-627
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|c DE-627
|e rakwb
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|a eng
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| 100 |
1 |
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|a Wang, Chongxia
|e verfasserin
|4 aut
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| 245 |
1 |
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|a Investigation of adsorption capacity of N-carboxymethyl chitosan for Pb(II) ions
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|c 2013
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|a Text
|b txt
|2 rdacontent
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|a ƒaComputermedien
|b c
|2 rdamedia
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|a ƒa Online-Ressource
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|2 rdacarrier
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|a Date Completed 20.02.2014
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|a Date Revised 04.11.2013
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|a published: Print
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|a Citation Status MEDLINE
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|a N-carboxymethyl chitosan (NCMC) was prepared by reacting chitosan (CTS) with chloroacetic acid and characterized by (13)C-NMR spectroscopy to confirm that carboxymethylation occurred only in the amino groups. The adsorption properties of CTS, NCMC and O-carboxymethyl chitosan (OCMC) towards Pb(II) ions were evaluated and the order of the adsorption capacity was as follows: NCMC > OCMC > CTS. The effects of initial pH value (2.0-5.5) of the solutions and contact time (5-120 min) on adsorption of Pb(II) were investigated and the kinetic data were evaluated using the pseudo-first-order and pseudo-second-order models. Kinetics study showed that the adsorption process followed second-order kinetics rather than the first-order one. Furthermore, the experimental equilibrium data of Pb(II) on the NCMC were analyzed using the Langmuir and Freundlich isotherm models and the results indicated that the Langmuir model gave a better fit than the Freundlich equation and the maximum adsorption capacity obtained from the Langmuir model was 421.9 mg g(-1)
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|a Journal Article
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|a Research Support, Non-U.S. Gov't
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|a O-carboxymethylchitosan
|2 NLM
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| 650 |
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7 |
|a Water Pollutants, Chemical
|2 NLM
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| 650 |
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7 |
|a Lead
|2 NLM
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| 650 |
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7 |
|a 2P299V784P
|2 NLM
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| 650 |
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|a N-(carboxymethyl)chitosan
|2 NLM
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| 650 |
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|a 83512-85-0
|2 NLM
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| 650 |
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|a Chitosan
|2 NLM
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| 650 |
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7 |
|a 9012-76-4
|2 NLM
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| 700 |
1 |
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|a Song, Qingping
|e verfasserin
|4 aut
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| 700 |
1 |
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|a Gao, Jiangang
|e verfasserin
|4 aut
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| 773 |
0 |
8 |
|i Enthalten in
|t Water science and technology : a journal of the International Association on Water Pollution Research
|d 1986
|g 68(2013), 8 vom: 28., Seite 1873-9
|w (DE-627)NLM098149431
|x 0273-1223
|7 nnns
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| 773 |
1 |
8 |
|g volume:68
|g year:2013
|g number:8
|g day:28
|g pages:1873-9
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|u http://dx.doi.org/10.2166/wst.2013.438
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