Characterization of isolated fractions of NOM from Songhua river

Jin Guo; Jun Ma

Characterization of isolated fractions of NOM from Songhua river

Jin Guo^*
, Jun Ma

^*Corresponding author for this work

School of Environment

Harbin Institute of Technology

Research output: Contribution to journal › Article › peer-review

13 Scopus citations

Abstract

Natural organic matter (NOM) was concentrated from Songhua River using a reverse osmosis system. The hydrophobic fraction (HyO), hydrophilic fraction (HyI), fulvic acid (FA) and humic acid (HA) were fractionated by the XAD resin, and a commercial humic acid (CHA) was used for comparison. The FA fraction predominant in natural water and account for the large part of DOC, and the aromaticity of these fractions followed the order HA>HyO>FA>HyI. A weak relationship exists between the E₄/E₆ and aromaticity. FTIR spectra revealed that the degree of saturation among these fractions was in the order of HyO≈FA>HyI>HA≈CHA. Gel chromatograph results showed that the weaker ultra violet-adsorption fraction of NOM contributed to the most part of molecular weight. Potentiometric titration indicated that the total organic acidity was in the range of 9.84-12.15 meq/g, and carboxylic acidity decrease in the order of CHA>HyI>HyO>NOM>FA>HA. ¹H NMR spectra demonstrated that NOM and the isolated fractions were predominated by aliphatic functional groups.

Original language	English
Pages (from-to)	77-84
Number of pages	8
Journal	Huanjing Kexue/Environmental Science
Volume	26
Issue number	5
State	Published - Sep 2005

Keywords

Fulvic acid
Humic acid
Hydrophilic fraction
Hydrophobic fraction
NOM
Reverse osmosis
XAD resin

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title = "Characterization of isolated fractions of NOM from Songhua river",

abstract = "Natural organic matter (NOM) was concentrated from Songhua River using a reverse osmosis system. The hydrophobic fraction (HyO), hydrophilic fraction (HyI), fulvic acid (FA) and humic acid (HA) were fractionated by the XAD resin, and a commercial humic acid (CHA) was used for comparison. The FA fraction predominant in natural water and account for the large part of DOC, and the aromaticity of these fractions followed the order HA>HyO>FA>HyI. A weak relationship exists between the E4/E6 and aromaticity. FTIR spectra revealed that the degree of saturation among these fractions was in the order of HyO≈FA>HyI>HA≈CHA. Gel chromatograph results showed that the weaker ultra violet-adsorption fraction of NOM contributed to the most part of molecular weight. Potentiometric titration indicated that the total organic acidity was in the range of 9.84-12.15 meq/g, and carboxylic acidity decrease in the order of CHA>HyI>HyO>NOM>FA>HA. 1H NMR spectra demonstrated that NOM and the isolated fractions were predominated by aliphatic functional groups.",

keywords = "Fulvic acid, Humic acid, Hydrophilic fraction, Hydrophobic fraction, NOM, Reverse osmosis, XAD resin",

author = "Jin Guo and Jun Ma",

year = "2005",

month = sep,

language = "英语",

volume = "26",

pages = "77--84",

journal = "Huanjing Kexue/Environmental Science",

issn = "0250-3301",

publisher = "Science Press ",

number = "5",

}

TY - JOUR

T1 - Characterization of isolated fractions of NOM from Songhua river

AU - Guo, Jin

AU - Ma, Jun

PY - 2005/9

Y1 - 2005/9

N2 - Natural organic matter (NOM) was concentrated from Songhua River using a reverse osmosis system. The hydrophobic fraction (HyO), hydrophilic fraction (HyI), fulvic acid (FA) and humic acid (HA) were fractionated by the XAD resin, and a commercial humic acid (CHA) was used for comparison. The FA fraction predominant in natural water and account for the large part of DOC, and the aromaticity of these fractions followed the order HA>HyO>FA>HyI. A weak relationship exists between the E4/E6 and aromaticity. FTIR spectra revealed that the degree of saturation among these fractions was in the order of HyO≈FA>HyI>HA≈CHA. Gel chromatograph results showed that the weaker ultra violet-adsorption fraction of NOM contributed to the most part of molecular weight. Potentiometric titration indicated that the total organic acidity was in the range of 9.84-12.15 meq/g, and carboxylic acidity decrease in the order of CHA>HyI>HyO>NOM>FA>HA. 1H NMR spectra demonstrated that NOM and the isolated fractions were predominated by aliphatic functional groups.

AB - Natural organic matter (NOM) was concentrated from Songhua River using a reverse osmosis system. The hydrophobic fraction (HyO), hydrophilic fraction (HyI), fulvic acid (FA) and humic acid (HA) were fractionated by the XAD resin, and a commercial humic acid (CHA) was used for comparison. The FA fraction predominant in natural water and account for the large part of DOC, and the aromaticity of these fractions followed the order HA>HyO>FA>HyI. A weak relationship exists between the E4/E6 and aromaticity. FTIR spectra revealed that the degree of saturation among these fractions was in the order of HyO≈FA>HyI>HA≈CHA. Gel chromatograph results showed that the weaker ultra violet-adsorption fraction of NOM contributed to the most part of molecular weight. Potentiometric titration indicated that the total organic acidity was in the range of 9.84-12.15 meq/g, and carboxylic acidity decrease in the order of CHA>HyI>HyO>NOM>FA>HA. 1H NMR spectra demonstrated that NOM and the isolated fractions were predominated by aliphatic functional groups.

KW - Fulvic acid

KW - Humic acid

KW - Hydrophilic fraction

KW - Hydrophobic fraction

KW - NOM

KW - Reverse osmosis

KW - XAD resin

UR - https://www.scopus.com/pages/publications/25844464165

M3 - 文章

C2 - 16366474

AN - SCOPUS:25844464165

SN - 0250-3301

VL - 26

SP - 77

EP - 84

JO - Huanjing Kexue/Environmental Science

JF - Huanjing Kexue/Environmental Science

IS - 5

ER -

Characterization of isolated fractions of NOM from Songhua river

Abstract

Keywords

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