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Dissolved Organic Carbon in Coastal Waters: Global Patterns, Stocks and Environmental Physical Controls SCIE
期刊论文 | 2025 , 39 (5) | GLOBAL BIOGEOCHEMICAL CYCLES
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Abstract :

Dissolved organic carbon (DOC) in coastal waters is integral to biogeochemical cycling, but global and regional drivers of DOC are still uncertain. In this study we explored spatial and temporal differences in DOC concentrations and stocks across the global coastal ocean, and how these relate to temperature and salinity. We estimated a global median coastal DOC stock of 3.15 Pg C (interquartile range (IQR) = 0.85 Pg C), with median DOC concentrations being 2.2 times higher than in open ocean surface waters. Globally and seasonally, salinity was the main driver of DOC with concentrations correlated negatively with salinity, without a clear relationship to temperature. DOC concentrations and stocks varied with region and season and this pattern is likely driven by riverine inputs of DOC and nutrients that stimulate coastal phytoplankton production. Temporally, high DOC concentrations occurred mainly in months with high freshwater input, with some exceptions such as in Eastern Boundary Current margins where peaks are related to primary production stimulated by nutrients upwelled from the adjacent ocean. No spatial trend between DOC and temperature was apparent, but many regions (19 out of 25) had aligned peaks of seasonal temperature and DOC, related to increased phytoplankton production and vertical stratification at high temperatures. Links of coastal DOC with salinity and temperature highlight the potential for anthropogenic impacts to alter coastal DOC concentration and composition, and thereby ecosystem status.

Keyword :

carbon stocks carbon stocks coastal ocean coastal ocean dissolved organic carbon (DOC) dissolved organic carbon (DOC) environmental drivers environmental drivers regional regional seasonal seasonal

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GB/T 7714 Lonborg, Christian , Fuentes-Santos, Isabel , Carreira, Catia et al. Dissolved Organic Carbon in Coastal Waters: Global Patterns, Stocks and Environmental Physical Controls [J]. | GLOBAL BIOGEOCHEMICAL CYCLES , 2025 , 39 (5) .
MLA Lonborg, Christian et al. "Dissolved Organic Carbon in Coastal Waters: Global Patterns, Stocks and Environmental Physical Controls" . | GLOBAL BIOGEOCHEMICAL CYCLES 39 . 5 (2025) .
APA Lonborg, Christian , Fuentes-Santos, Isabel , Carreira, Catia , Amaral, Valentina , Aristegui, Javier , Bhadury, Punyasloke et al. Dissolved Organic Carbon in Coastal Waters: Global Patterns, Stocks and Environmental Physical Controls . | GLOBAL BIOGEOCHEMICAL CYCLES , 2025 , 39 (5) .
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Deciphering the composition and degradation of dissolved organic matter in a large subtropical river using optical indices and high-resolution FT-ICR-MS EI
期刊论文 | 2025 , 157 , 580-591 | Journal of Environmental Sciences (China)
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Abstract :

Dissolved organic matter (DOM) is very important in aquatic environments, yet it is challenging to characterize DOM as a highly complex mixture of thousands of molecules, and the knowledge of the effects of different degradation processes on different molecules remains limited. This study examined the distribution and degradation of DOM in a large subtropical river using optical techniques and Fourier transform ion cyclotron resonance mass spectrometry (FT-ICR-MS). At the molecular level, DOM was mainly composed of CHO and lignin-like compounds, which was related to the dominance of forestland in the watershed and resulted in a low biological lability index (MLBL). The modified aromaticity index (AImod), unsaturation degree (DBE), and humic content (HIX) decreased while MLBL, H/C, absorption spectral slope (S275–295), and biological index (BIX) increased in the estuarine zone due to the increasing autochthonous contribution. Photo- and microbial degradation resulted in a similar decrease in the bulk dissolved organic carbon, while they showed opposite effects on the DOM composition. Photo-degradation removed all fluorescent components and decreased molecular weight, HIX, AImod, DBE, %CHO, %lignin-like, %tannin-like, and %condensed aromatic-like compounds. In contrast, bio-degradation preferentially consumed lipid-like, protein-like, and carbohydrate-like compounds, with increases in %lignin-like, %tannin-like, %condensed aromatic-like compounds, and humic-like fluorescent components. Overall, the application of ultra-high resolution mass spectrometry provided valuable insights into the composition and behavior of DOM at the molecular level and revealed the contrasting effects of photo- and microbial degradation on different compounds. These results have implications for better understanding the composition and transformation of aquatic DOM. © 2024

Keyword :

Aromatization Aromatization Cells Cells Glycosides Glycosides Phenols Phenols Unsaturated compounds Unsaturated compounds

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GB/T 7714 Wang, Yufan , Zhang, Wenyi , Fang, Futao et al. Deciphering the composition and degradation of dissolved organic matter in a large subtropical river using optical indices and high-resolution FT-ICR-MS [J]. | Journal of Environmental Sciences (China) , 2025 , 157 : 580-591 .
MLA Wang, Yufan et al. "Deciphering the composition and degradation of dissolved organic matter in a large subtropical river using optical indices and high-resolution FT-ICR-MS" . | Journal of Environmental Sciences (China) 157 (2025) : 580-591 .
APA Wang, Yufan , Zhang, Wenyi , Fang, Futao , Zhang, Zhihao , Zhu, Zhuoyi , Yang, Liyang et al. Deciphering the composition and degradation of dissolved organic matter in a large subtropical river using optical indices and high-resolution FT-ICR-MS . | Journal of Environmental Sciences (China) , 2025 , 157 , 580-591 .
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Characterization of sediment organic matter in the outer Yangtze River Estuary using stable isotopes, optical techniques, and FT-ICR-MS: Implications for the carbon burial mechanism SCIE
期刊论文 | 2024 , 267 | WATER RESEARCH
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Abstract :

The burial of sediment organic matter (SOM) in the estuary and shelf plays an important role in the global carbon cycle. However, it is challenging to determine the source, composition, and burial of SOM in the coastal sea, especially at the molecular level. This was explored in the coastal area outside the largest Yangtze River of China with multiple techniques including elemental and stable isotopic analysis, absorption spectroscopy, fluorescence excitation-emission matrices coupled with parallel factor analysis (EEMs-PARAFAC), and ultra-high resolution Fourier transform ion cyclotron resonance mass spectrometry (FT-ICR-MS). The end-member mixing analysis based on delta 13C and delta 15N showed a dominance of marine contribution (up to 70%) at most stations while the terrestrial contribution increased to >55% nearshore in summer at a high fluvial sediment flux. This was consistent with the offshore decreasing humic-like C1 and C2, humification index (HIX), %lignin-like compounds, and %CHO but increasing tryptophan-like C3, biological index (BIX), %protein-like compounds, and % CHOS from EEMs-PARAFAC and FT-ICR-MS analysis. The %clay correlated positively with SOM content, HIX, % lignin-like compounds, O/C, and modified aromaticity index (AImod) but correlated negatively with %C3, H/C, and the relative abundance of labile formulas (MLBL), while %silt showed contrasting correlations. These results indicated the fine clay sediments adsorbed more humified, aromatic, oxygenated, and terrestrial compounds that were probably more resistant to biodegradation and thus had a higher burial efficiency than those on the silty sediments. Principal component analysis based on SOM indices further revealed different characteristics of SOM in the nearshore, northern offshore, and southern offshore regions, which were probably dependent on the delivery by local current systems. Overall, these findings contributed to unraveling the source and molecular composition of SOM associated with different grain size sediments and local current delivery, which are fundamental for understanding the factors underlying carbon burial in the complex coastal environment.

Keyword :

EEMs-PARAFAC EEMs-PARAFAC Estuary Estuary FT-ICR-MS FT-ICR-MS Sediment organic matter Sediment organic matter Stable isotope Stable isotope

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GB/T 7714 Zhang, Wenyi , Wang, Yufan , Fang, Futao et al. Characterization of sediment organic matter in the outer Yangtze River Estuary using stable isotopes, optical techniques, and FT-ICR-MS: Implications for the carbon burial mechanism [J]. | WATER RESEARCH , 2024 , 267 .
MLA Zhang, Wenyi et al. "Characterization of sediment organic matter in the outer Yangtze River Estuary using stable isotopes, optical techniques, and FT-ICR-MS: Implications for the carbon burial mechanism" . | WATER RESEARCH 267 (2024) .
APA Zhang, Wenyi , Wang, Yufan , Fang, Futao , Zhuang, Wan-E , Yang, Liyang , Zhu, Zhuoyi . Characterization of sediment organic matter in the outer Yangtze River Estuary using stable isotopes, optical techniques, and FT-ICR-MS: Implications for the carbon burial mechanism . | WATER RESEARCH , 2024 , 267 .
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Characterization of sediment organic matter in the outer Yangtze River Estuary using stable isotopes, optical techniques, and FT-ICR-MS: Implications for the carbon burial mechanism EI
期刊论文 | 2024 , 267 | Water Research
Characterization of sediment organic matter in the outer Yangtze River Estuary using stable isotopes, optical techniques, and FT-ICR-MS: Implications for the carbon burial mechanism Scopus
期刊论文 | 2024 , 267 | Water Research
A global database of dissolved organic matter (DOM) concentration measurements in coastal waters (CoastDOM v1) SCIE
期刊论文 | 2024 , 16 (2) , 1107-1119 | EARTH SYSTEM SCIENCE DATA
WoS CC Cited Count: 1
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Abstract :

Measurements of dissolved organic carbon (DOC), nitrogen (DON), and phosphorus (DOP) concentrations are used to characterize the dissolved organic matter (DOM) pool and are important components of biogeochemical cycling in the coastal ocean. Here, we present the first edition of a global database (CoastDOM v1; available at https://doi.org/10.1594/PANGAEA.964012, L & oslash;nborg et al., 2023) compiling previously published and unpublished measurements of DOC, DON, and DOP in coastal waters. These data are complemented by hydrographic data such as temperature and salinity and, to the extent possible, other biogeochemical variables (e.g. chlorophyll a, inorganic nutrients) and the inorganic carbon system (e.g. dissolved inorganic carbon and total alkalinity). Overall, CoastDOM v1 includes observations of concentrations from all continents. However, most data were collected in the Northern Hemisphere, with a clear gap in DOM measurements from the Southern Hemisphere. The data included were collected from 1978 to 2022 and consist of 62 338 data points for DOC, 20 356 for DON, and 13 533 for DOP. The number of measurements decreases progressively in the sequence DOC > DON > DOP, reflecting both differences in the maturity of the analytical methods and the greater focus on carbon cycling by the aquatic science community. The global database shows that the average DOC concentration in coastal waters (average +/- standard deviation (SD): 182 +/- 314 mu mol C L-1; median: 103 mu mol C L-1) is 13-fold higher than the average coastal DON concentration (13.6 +/- 30.4 mu mol N L-1; median: 8.0 mu mol N L-1), which is itself 39-fold higher than the average coastal DOP concentration (0.34 +/- 1.11 mu mol P L-1; median: 0.18 mu mol P L-1). This dataset will be useful for identifying global spatial and temporal patterns in DOM and will help facilitate the reuse of DOC, DON, and DOP data in studies aimed at better characterizing local biogeochemical processes; closing nutrient budgets; estimating carbon, nitrogen, and phosphorous pools; and establishing a baseline for modelling future changes in coastal waters.

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GB/T 7714 Lonborg, Christian , Carreira, Catia , Abril, Gwenael et al. A global database of dissolved organic matter (DOM) concentration measurements in coastal waters (CoastDOM v1) [J]. | EARTH SYSTEM SCIENCE DATA , 2024 , 16 (2) : 1107-1119 .
MLA Lonborg, Christian et al. "A global database of dissolved organic matter (DOM) concentration measurements in coastal waters (CoastDOM v1)" . | EARTH SYSTEM SCIENCE DATA 16 . 2 (2024) : 1107-1119 .
APA Lonborg, Christian , Carreira, Catia , Abril, Gwenael , Agusti, Susana , Amaral, Valentina , Andersson, Agneta et al. A global database of dissolved organic matter (DOM) concentration measurements in coastal waters (CoastDOM v1) . | EARTH SYSTEM SCIENCE DATA , 2024 , 16 (2) , 1107-1119 .
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Tracking the changes of dissolved organic matter throughout the city water supply system with optical indices SCIE
期刊论文 | 2024 , 358 | JOURNAL OF ENVIRONMENTAL MANAGEMENT
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Abstract :

Dissolved organic matter (DOM) is important in determining the drinking water treatment and the supplied water quality. However, a comprehensive DOM study for the whole water supply system is lacking and the potential effects of secondary water supply are largely unknown. This was studied using dissolved organic carbon (DOC), absorption spectroscopy, and fluorescence excitation -emission matrices -parallel factor analysis (EEMPARAFAC). Four fluorescent components were identified, including humic-like C1-C2, tryptophan-like C3, and tyrosine -like C4. In the drinking water treatment plants, the advanced treatment using ozone and biological activated carbon (O3-BAC) was more effective in removing DOC than the conventional process, with the removals of C1 and C3 improved by 17.7%-25.1% and 19.2%-27.0%. The absorption coefficient and C1-C4 correlated significantly with DOC in water treatments, suggesting that absorption and fluorescence could effectively track the changes in bulk DOM. DOM generally remained stable in each drinking water distribution system, suggesting the importance of the treated water quality in determining that of the corresponding network. The optical indices changed notably between distribution networks of different treatment plants, which enabled the identification of changing water sources. A comparison of DOM in the direct and secondary water supplies suggested limited impacts of secondary water supply, although the changes in organic carbon and absorption indices were detected in some locations. These results have implications for better understanding the changes of DOM in the whole water supply system to help ensure the supplied water quality.

Keyword :

Dissolved organic matter Dissolved organic matter Drinking water treatment Drinking water treatment Fluorescence excitation -emission matrices Fluorescence excitation -emission matrices Parallel factor analysis Parallel factor analysis Water supply system Water supply system

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GB/T 7714 Lin, Jinjin , Yang, Liyang , Zhuang, Wan-E et al. Tracking the changes of dissolved organic matter throughout the city water supply system with optical indices [J]. | JOURNAL OF ENVIRONMENTAL MANAGEMENT , 2024 , 358 .
MLA Lin, Jinjin et al. "Tracking the changes of dissolved organic matter throughout the city water supply system with optical indices" . | JOURNAL OF ENVIRONMENTAL MANAGEMENT 358 (2024) .
APA Lin, Jinjin , Yang, Liyang , Zhuang, Wan-E , Wang, Yue , Chen, Xiaochen , Niu, Jia . Tracking the changes of dissolved organic matter throughout the city water supply system with optical indices . | JOURNAL OF ENVIRONMENTAL MANAGEMENT , 2024 , 358 .
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Tracking the changes of dissolved organic matter throughout the city water supply system with optical indices EI
期刊论文 | 2024 , 358 | Journal of Environmental Management
Tracking the changes of dissolved organic matter throughout the city water supply system with optical indices Scopus
期刊论文 | 2024 , 358 | Journal of Environmental Management
中国东南沿海典型养殖海湾:三沙湾海—气界面甲烷扩散通量及影响因素研究
期刊论文 | 2024 , 39 (11) , 1156-1168 | 地球科学进展
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科学评估海湾养殖区的溶存甲烷(CH4)和海—气扩散通量分布对于认识渔业养殖活动对大气CH4的区域性贡献具有重要意义.基于2023年4个季度现场考察,研究了福建省典型养殖海湾——三沙湾各季度、不同养殖区域表层海水的溶存CH4浓度、海—气扩散通量分布特征及影响因素,评估了海湾渔业养殖活动对大气CH4浓度变化的贡献.结果表明,海湾表层水体溶存CH4浓度为9.91~609.22 nmol/L,海—气扩散通量为3.46~1 188.15 μmol/(m2·d),CH4海—气扩散通量表现为夏季>秋季>春季>冬季.三沙湾内溶存CH4浓度及海—气扩散通量空间分布趋势一致,总体呈现由河口向湾口降低的趋势,CH4高值区域出现在养殖活动频繁的河口养殖区站位,其次为中部养殖区和东部养殖区,湾口养殖区为监测最低值区域.对三沙湾养殖区域的表层海水溶存CH4浓度、海—气扩散通量的时空分布特征及环境因素相关性分析表明,渔业养殖活动及陆源径流输入共同调控着海湾内CH4的时空分布格局.大型藻类养殖期间,养殖区域水体溶存CH4浓度、通量低于非大型藻类养殖期;夏季是CH4释放的高峰,这与鱼类养殖活动增多和丰水期径流输入密切相关.养殖海域的溶存CH4浓度及海—气扩散通量研究可为养殖业CH4控制减排提供科学支撑.

Keyword :

三沙湾 三沙湾 时空分布 时空分布 水产养殖 水产养殖 海—气扩散通量 海—气扩散通量 溶存甲烷 溶存甲烷 环境因子 环境因子

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GB/T 7714 雷灵逸 , 王飞鹏 , 臧昆鹏 et al. 中国东南沿海典型养殖海湾:三沙湾海—气界面甲烷扩散通量及影响因素研究 [J]. | 地球科学进展 , 2024 , 39 (11) : 1156-1168 .
MLA 雷灵逸 et al. "中国东南沿海典型养殖海湾:三沙湾海—气界面甲烷扩散通量及影响因素研究" . | 地球科学进展 39 . 11 (2024) : 1156-1168 .
APA 雷灵逸 , 王飞鹏 , 臧昆鹏 , 吕小龙 , 张智 , 杨丽阳 et al. 中国东南沿海典型养殖海湾:三沙湾海—气界面甲烷扩散通量及影响因素研究 . | 地球科学进展 , 2024 , 39 (11) , 1156-1168 .
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中国东南沿海典型养殖海湾:三沙湾海——气界面甲烷扩散通量及影响因素研究
期刊论文 | 2024 , 39 (11) , 1156-1168 | 地球科学进展
中国东南沿海典型养殖海湾:三沙湾海—气界面甲烷扩散通量及影响因素研究 Scopus
期刊论文 | 2024 , 39 (11) , 1156-1168 | 地球科学进展
K/Zn/Sn/S金属硫化物对水中铯离子的吸附去除性能及机理 CSCD PKU
期刊论文 | 2024 , 18 (1) , 1-12 | 环境工程学报
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Abstract :

通过水热法合成了纳米片状K/Zn/Sn/S金属硫化物(KZTS-NS),并研究了 KZTS-NS对Cs+的吸附特性及机理.结果表明,KZTS-NS具有快速的吸附Cs+动力学特性,仅需10 min即可达到吸附平衡,此时Cs+去除率为96.50%;KZTS-NS对Cs+的吸附等温线符合Langmuir模型,最大吸附容量为133.96 mg·g-1,高于报道的其他吸附剂,且吸附是个自发、吸热且熵增的过程;KZTS-NS能够在pH为3~10内对Cs+保持良好吸附效果;溶液中共存离子对KZTS-NS吸附效果的影响从高到低排序依次为Mg2+>Ca2+>Na+>K+,在自来水中、矿泉水、湖水和海水中KZTS-NS对Cs+的去除率分别为42.14%、25.15%、14.14%和4.44%.此外,利用扫描电子显微镜(SEM)、X射线衍射(XRD)和X射线光电子能谱(XPS)等技术对吸附铯离子(Cs+)前后的KZTS-NS进行表征以揭示吸附机理.结果表明,KZTS-NS具有纳米片形貌,K、Zn、Sn和S元素在表面均匀分布,吸附Cs+后形貌保持不变,并且XRD特征峰往低角度方向偏移,对应的晶面间距增大;由XPS图谱和定量分析可知,KZTS-NS对Cs+的吸附机理为离子交换.总之,KZTS-NS能够快速、高效地去除废水中的Cs+,具有较大的应用潜力.本研究将为放射性废水中Cs+的处理提供技术参考和基础数据支撑.

Keyword :

吸附 吸附 放射性污染 放射性污染 离子交换 离子交换 金属硫化物 金属硫化物

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GB/T 7714 洪奇圣 , 穆景利 , 张艳 et al. K/Zn/Sn/S金属硫化物对水中铯离子的吸附去除性能及机理 [J]. | 环境工程学报 , 2024 , 18 (1) : 1-12 .
MLA 洪奇圣 et al. "K/Zn/Sn/S金属硫化物对水中铯离子的吸附去除性能及机理" . | 环境工程学报 18 . 1 (2024) : 1-12 .
APA 洪奇圣 , 穆景利 , 张艳 , 袁宗胜 , 杨丽阳 , 张铭栋 . K/Zn/Sn/S金属硫化物对水中铯离子的吸附去除性能及机理 . | 环境工程学报 , 2024 , 18 (1) , 1-12 .
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K/Zn/Sn/S金属硫化物对水中铯离子的吸附去除性能及机理 Scopus CSCD PKU
期刊论文 | 2024 , 18 (1) , 1-12 | 环境工程学报
K/Zn/Sn/S金属硫化物对水中铯离子的吸附去除性能及机理 CSCD PKU
期刊论文 | 2024 , 18 (01) , 1-12 | 环境工程学报
碳中和背景下水体溶解有机质碳汇潜力解析的实验设计 PKU
期刊论文 | 2024 , 41 (1) , 220-224 | 实验技术与管理
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Abstract :

该文将科技前沿和实验教学相结合,设计了水体DOM碳汇潜力解析探索型实验.该实验设计采集典型水体的DOM样品,开展生物降解培养实验,综合运用总有机碳分析仪、紫外-可见吸收光谱仪和分子荧光光谱仪,定量分析总体溶解有机碳(DOC)的生物可降解性,解析DOM中有色组分和不同类型荧光组分的降解转化特征.实验结果可用于环境DOM的碳汇潜力评估和机理解析.该实验有助于学生理解碳中和前沿科学理论,掌握现代仪器分析技术的原理、操作和数据处理分析方法,培养创新思维和实践能力.

Keyword :

分子荧光光谱 分子荧光光谱 实验设计 实验设计 溶解有机质 溶解有机质 碳中和 碳中和 碳汇 碳汇

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GB/T 7714 杨丽阳 , 王羽凡 , 陈苇 et al. 碳中和背景下水体溶解有机质碳汇潜力解析的实验设计 [J]. | 实验技术与管理 , 2024 , 41 (1) : 220-224 .
MLA 杨丽阳 et al. "碳中和背景下水体溶解有机质碳汇潜力解析的实验设计" . | 实验技术与管理 41 . 1 (2024) : 220-224 .
APA 杨丽阳 , 王羽凡 , 陈苇 , 朱卓毅 . 碳中和背景下水体溶解有机质碳汇潜力解析的实验设计 . | 实验技术与管理 , 2024 , 41 (1) , 220-224 .
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碳中和背景下水体溶解有机质碳汇潜力解析的实验设计 PKU
期刊论文 | 2024 , 41 (01) , 220-224 | 实验技术与管理
Optical and molecular indices of dissolved organic matter for estimating biodegradability and resulting carbon dioxide production in inland waters: A review SCIE
期刊论文 | 2023 , 228 | WATER RESEARCH
WoS CC Cited Count: 54
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Abstract :

Biodegradable dissolved organic carbon (BDOC) constitutes the most labile fraction of dissolved organic matter (DOM), which also functions as a source of CO2 emissions from inland waters. However, no systematic review is available on DOM indicators of BDOC and CO2 production potential. Optical and molecular indices can be used to track small changes in DOM composition during biodegradation. In this review, we identified four different methods for measuring BDOC together with their strengths and limitations. In addition, we discuss the potential of using documented optical indices based on absorption and fluorescence spectroscopy and molecular indices based on Fourier transform ion cyclotron mass spectrometry as proxies for estimating BDOC and biodegradationinduced CO2 production based on previously reported relationships in the literature. Many absorbance- and fluorescence-based indices showed inconsistent relationships with BDOC depending on watershed characteristics, hydrology, and anthropogenic impacts. Nevertheless, several indices, including specific UV absorbance at 254 nm (SUVA254), humification index (HIX), and terrestrial humic-like fluorescent DOM (FDOM) components, tended to have negative relationships with BDOC in tropical and temperate watersheds under baseflow or drought periods. Protein-like FDOM exhibited the strongest correlation with BDOC in different systems, except during storms and flood events. Despite the limited number of studies, DOM molecular indices exhibited consistent relationships with BDOC, suggesting that the relative abundance of aliphatic formulas and the molecular lability index could act as reliable proxies. The DOM optical indices explain up to 96% and 78% variability in BDOC and CO2, respectively; nonetheless, there were limited studies on molecular indices, which explain up to 74% variability in BDOC. Based on literature survey, we recommend several sensitive indices such as SUVA254, HIX, and terrestrial humic- and protein-like FDOM, which could be useful indicators of BDOC and dissolved CO2 in inland water. Future research should incorporate a wider range of geographic regions with various land use, hydrology, and anthropogenic disturbances to develop system- or condition-specific DOM optical or molecular proxies for better prediction of BDOC and CO2 emissions.

Keyword :

Biodegradable dissolved organic carbon Biodegradable dissolved organic carbon CO 2 emissions CO 2 emissions Dissolved organic matter Dissolved organic matter Fluorescence Fluorescence FT-ICR-MS FT-ICR-MS

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GB/T 7714 Begum, Most Shirina , Park, Ji-Hyung , Yang, Liyang et al. Optical and molecular indices of dissolved organic matter for estimating biodegradability and resulting carbon dioxide production in inland waters: A review [J]. | WATER RESEARCH , 2023 , 228 .
MLA Begum, Most Shirina et al. "Optical and molecular indices of dissolved organic matter for estimating biodegradability and resulting carbon dioxide production in inland waters: A review" . | WATER RESEARCH 228 (2023) .
APA Begum, Most Shirina , Park, Ji-Hyung , Yang, Liyang , Shin, Kyung Hoon , Hur, Jin . Optical and molecular indices of dissolved organic matter for estimating biodegradability and resulting carbon dioxide production in inland waters: A review . | WATER RESEARCH , 2023 , 228 .
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Optical and molecular indices of dissolved organic matter for estimating biodegradability and resulting carbon dioxide production in inland waters: A review EI
期刊论文 | 2023 , 228 | Water Research
Optical and molecular indices of dissolved organic matter for estimating biodegradability and resulting carbon dioxide production in inland waters: A review Scopus
期刊论文 | 2023 , 228 | Water Research
Unveiling changes in the complexation of dissolved organic matter with Pb (II) by photochemical and microbial degradation using fluorescence EEMs-PARAFAC SCIE
期刊论文 | 2023 , 341 | ENVIRONMENTAL POLLUTION
WoS CC Cited Count: 17
Abstract&Keyword Cite Version(2)

Abstract :

Dissolved organic matter (DOM) is very important in determining the speciation, behaviors, and risk of metal pollutants in aquatic ecosystems. Photochemical and microbial degradation are key processes in the cycling of DOM, yet their effects on the DOM-Pb(II) interaction remain largely unknown. This was studied by examining the complexation of river DOM with Pb(II) after degradation, using fluorescence quenching titration and excitationemission matrices-parallel factor analysis (EEMs-PARAFAC). Three humic-like and two protein-like components were identified, with strong removals of humic-like components and decreasing average molecular weight and humification degree of DOM by photo- and photo-microbial degradation. The changes in humic-like abundance and structure resulted in notable weakening of their interaction with Pb(II). The tryptophan-like C2 was also mainly removed by photo-degradation, while the tyrosine-like C3 could be either removed or accumulated. The Pb(II)-binding of protein-like components was generally weaker but was enhanced in some degradation groups, which might be related to the lowering competition from humic-like components. The binding parameters correlated significantly with the DOM indices, which were dominated by photo-degradation for humic-like components but by seasonal variations for the tyrosine-like component. These results have implications for understanding the key mechanisms underlying the variability of the DOM-metal interaction in aquatic environments.

Keyword :

Dissolved organic matter Dissolved organic matter EEMs-PARAFAC EEMs-PARAFAC Microbial degradation Microbial degradation Pb(II) Pb(II) Photo-degradation Photo-degradation

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GB/T 7714 Yang, Liyang , Chen, Linwei , Zhuang, Wan-E et al. Unveiling changes in the complexation of dissolved organic matter with Pb (II) by photochemical and microbial degradation using fluorescence EEMs-PARAFAC [J]. | ENVIRONMENTAL POLLUTION , 2023 , 341 .
MLA Yang, Liyang et al. "Unveiling changes in the complexation of dissolved organic matter with Pb (II) by photochemical and microbial degradation using fluorescence EEMs-PARAFAC" . | ENVIRONMENTAL POLLUTION 341 (2023) .
APA Yang, Liyang , Chen, Linwei , Zhuang, Wan-E , Zhu, Zhuoyi . Unveiling changes in the complexation of dissolved organic matter with Pb (II) by photochemical and microbial degradation using fluorescence EEMs-PARAFAC . | ENVIRONMENTAL POLLUTION , 2023 , 341 .
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Unveiling changes in the complexation of dissolved organic matter with Pb(II) by photochemical and microbial degradation using fluorescence EEMs-PARAFAC Scopus
期刊论文 | 2024 , 341 | Environmental Pollution
Unveiling changes in the complexation of dissolved organic matter with Pb(II) by photochemical and microbial degradation using fluorescence EEMs-PARAFAC EI
期刊论文 | 2024 , 341 | Environmental Pollution
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