Characteristics and DBP formation of dissolved organic matter from leachates of fresh and aged leaf litter

Qianyun Jian; Treavor H. Boyer; Xiuhong Yang; Beicheng Xia; Xin Yang

doi:10.1016/j.chemosphere.2016.02.107

Characteristics and DBP formation of dissolved organic matter from leachates of fresh and aged leaf litter

Qianyun Jian, Treavor H. Boyer, Xiuhong Yang, Beicheng Xia, Xin Yang

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

20 Scopus citations

Abstract

Dissolved organic matter (DOM) was leached from leaves of two trees commonly grown in subtropical regions, Pinus elliottii (commonly known as slash pine) and Schima superba (S. superba), and its degradation pattern and potential for forming disinfection byproducts (DBPs) were evaluated. The leaves were exposed in the field for up to one year before leaching. The DOM leached from slash pine litter contained on average 10.4 mg of dissolved organic carbon (DOC) per gram of dry weight; for S. superba the average was 37.2 mg-DOC/g-dry weight. Ultraviolet and visible light absorbance, fluorescence, and molecular weight analysis indicated that more aromatic/humic and higher molecular weight compounds are formed as leaf litter ages. A 4-component parallel factor analysis of the fluorescence data showed that the intensity of peaks related with protein-like components decreased gradually during biodegradation, while that of peaks attributed to humic-acid-like components increased continuously. Fresh slash pine leachates formed on average 40.0 μg of trihalomethane (THM) per milligram of DOC, while S. superba leachates formed 45.6 μg. THM formation showed peak values of 55.7 μg/mg DOC for slash pine and 74.9 μg/mg DOC for S. superba after 8 months of aging. The formation of haloacetonitrile (HAN) and trichloronitromethane (TCNM) increased with increasing leaf age, while chloral hydrate (CH) formation did not show such a trend. Specific UV absorbance showed some positive correlation with DBPs, but humic-acid-like and protein-like absorbance peaks correlated with CH and TCNM yields in only some leaf samples.

Original language	English (US)
Pages (from-to)	335-344
Number of pages	10
Journal	Chemosphere
Volume	152
DOIs	https://doi.org/10.1016/j.chemosphere.2016.02.107
State	Published - Jun 1 2016
Externally published	Yes

Keywords

Biodegradation
Chlorination
Disinfection byproducts
Leaves
Photodegradation

ASJC Scopus subject areas

Environmental Engineering
Environmental Chemistry
Chemistry(all)
Pollution
Health, Toxicology and Mutagenesis

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10.1016/j.chemosphere.2016.02.107

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@article{4882a30a3053455bb7fd426073cb3c6d,

title = "Characteristics and DBP formation of dissolved organic matter from leachates of fresh and aged leaf litter",

abstract = "Dissolved organic matter (DOM) was leached from leaves of two trees commonly grown in subtropical regions, Pinus elliottii (commonly known as slash pine) and Schima superba (S. superba), and its degradation pattern and potential for forming disinfection byproducts (DBPs) were evaluated. The leaves were exposed in the field for up to one year before leaching. The DOM leached from slash pine litter contained on average 10.4 mg of dissolved organic carbon (DOC) per gram of dry weight; for S. superba the average was 37.2 mg-DOC/g-dry weight. Ultraviolet and visible light absorbance, fluorescence, and molecular weight analysis indicated that more aromatic/humic and higher molecular weight compounds are formed as leaf litter ages. A 4-component parallel factor analysis of the fluorescence data showed that the intensity of peaks related with protein-like components decreased gradually during biodegradation, while that of peaks attributed to humic-acid-like components increased continuously. Fresh slash pine leachates formed on average 40.0 μg of trihalomethane (THM) per milligram of DOC, while S. superba leachates formed 45.6 μg. THM formation showed peak values of 55.7 μg/mg DOC for slash pine and 74.9 μg/mg DOC for S. superba after 8 months of aging. The formation of haloacetonitrile (HAN) and trichloronitromethane (TCNM) increased with increasing leaf age, while chloral hydrate (CH) formation did not show such a trend. Specific UV absorbance showed some positive correlation with DBPs, but humic-acid-like and protein-like absorbance peaks correlated with CH and TCNM yields in only some leaf samples.",

keywords = "Biodegradation, Chlorination, Disinfection byproducts, Leaves, Photodegradation",

author = "Qianyun Jian and Boyer, {Treavor H.} and Xiuhong Yang and Beicheng Xia and Xin Yang",

note = "Funding Information: We thank China's National Basic Research Program (grant 2015CB459000 ), Guangdong{\textquoteright}s Natural Science Fund for Distinguished Young Scholars (grant 2015A030306017 ) and Shenzhen's Science and Technology Program (grant JCYJ20140814173042940 ) for their financial support of this study. The support from the National Natural Science Foundation of China (grant 41001322 ) is also appreciated. Publisher Copyright: {\textcopyright} 2016 Elsevier Ltd.",

year = "2016",

month = jun,

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doi = "10.1016/j.chemosphere.2016.02.107",

language = "English (US)",

volume = "152",

pages = "335--344",

journal = "Chemosphere",

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TY - JOUR

T1 - Characteristics and DBP formation of dissolved organic matter from leachates of fresh and aged leaf litter

AU - Jian, Qianyun

AU - Boyer, Treavor H.

AU - Yang, Xiuhong

AU - Xia, Beicheng

AU - Yang, Xin

N1 - Funding Information: We thank China's National Basic Research Program (grant 2015CB459000 ), Guangdong’s Natural Science Fund for Distinguished Young Scholars (grant 2015A030306017 ) and Shenzhen's Science and Technology Program (grant JCYJ20140814173042940 ) for their financial support of this study. The support from the National Natural Science Foundation of China (grant 41001322 ) is also appreciated. Publisher Copyright: © 2016 Elsevier Ltd.

PY - 2016/6/1

Y1 - 2016/6/1

N2 - Dissolved organic matter (DOM) was leached from leaves of two trees commonly grown in subtropical regions, Pinus elliottii (commonly known as slash pine) and Schima superba (S. superba), and its degradation pattern and potential for forming disinfection byproducts (DBPs) were evaluated. The leaves were exposed in the field for up to one year before leaching. The DOM leached from slash pine litter contained on average 10.4 mg of dissolved organic carbon (DOC) per gram of dry weight; for S. superba the average was 37.2 mg-DOC/g-dry weight. Ultraviolet and visible light absorbance, fluorescence, and molecular weight analysis indicated that more aromatic/humic and higher molecular weight compounds are formed as leaf litter ages. A 4-component parallel factor analysis of the fluorescence data showed that the intensity of peaks related with protein-like components decreased gradually during biodegradation, while that of peaks attributed to humic-acid-like components increased continuously. Fresh slash pine leachates formed on average 40.0 μg of trihalomethane (THM) per milligram of DOC, while S. superba leachates formed 45.6 μg. THM formation showed peak values of 55.7 μg/mg DOC for slash pine and 74.9 μg/mg DOC for S. superba after 8 months of aging. The formation of haloacetonitrile (HAN) and trichloronitromethane (TCNM) increased with increasing leaf age, while chloral hydrate (CH) formation did not show such a trend. Specific UV absorbance showed some positive correlation with DBPs, but humic-acid-like and protein-like absorbance peaks correlated with CH and TCNM yields in only some leaf samples.

AB - Dissolved organic matter (DOM) was leached from leaves of two trees commonly grown in subtropical regions, Pinus elliottii (commonly known as slash pine) and Schima superba (S. superba), and its degradation pattern and potential for forming disinfection byproducts (DBPs) were evaluated. The leaves were exposed in the field for up to one year before leaching. The DOM leached from slash pine litter contained on average 10.4 mg of dissolved organic carbon (DOC) per gram of dry weight; for S. superba the average was 37.2 mg-DOC/g-dry weight. Ultraviolet and visible light absorbance, fluorescence, and molecular weight analysis indicated that more aromatic/humic and higher molecular weight compounds are formed as leaf litter ages. A 4-component parallel factor analysis of the fluorescence data showed that the intensity of peaks related with protein-like components decreased gradually during biodegradation, while that of peaks attributed to humic-acid-like components increased continuously. Fresh slash pine leachates formed on average 40.0 μg of trihalomethane (THM) per milligram of DOC, while S. superba leachates formed 45.6 μg. THM formation showed peak values of 55.7 μg/mg DOC for slash pine and 74.9 μg/mg DOC for S. superba after 8 months of aging. The formation of haloacetonitrile (HAN) and trichloronitromethane (TCNM) increased with increasing leaf age, while chloral hydrate (CH) formation did not show such a trend. Specific UV absorbance showed some positive correlation with DBPs, but humic-acid-like and protein-like absorbance peaks correlated with CH and TCNM yields in only some leaf samples.

KW - Biodegradation

KW - Chlorination

KW - Disinfection byproducts

KW - Leaves

KW - Photodegradation

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DO - 10.1016/j.chemosphere.2016.02.107

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SN - 0045-6535

VL - 152

SP - 335

EP - 344

JO - Chemosphere

JF - Chemosphere

ER -

Characteristics and DBP formation of dissolved organic matter from leachates of fresh and aged leaf litter

Abstract

Keywords

ASJC Scopus subject areas

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