DOI: 10.1016/j.watres.2017.12.030
Scopus记录号: 2-s2.0-85042231372
论文题名: Reduction in the exchange of coastal dissolved organic matter and microgels by inputs of extra riverine organic matter
作者: Shiu R.-F. ; Lee C.-L. ; Chin W.-C.
刊名: Water Research
ISSN: 431354
出版年: 2018
卷: 131 起始页码: 161
结束页码: 166
语种: 英语
英文关键词: Dissolved organic matter
; Microgel
; Particulate organic matter
; Riverine organic matter
; Self-assembly
Scopus关键词: Biogeochemistry
; Dissolution
; Gels
; Natural polymers
; Organic acids
; Organic carbon
; Organic compounds
; Organic polymers
; Particle size
; Polymers
; Self assembly
; Surface chemistry
; Surface waters
; Dissolved organic matters
; Microgel
; Natural organic matters
; Negative surface charges
; Organic carbon cycle
; Particulate organic matters
; Sedimentation fluxes
; Suwannee river humic acid
; Biological materials
; calcium ion
; dissolved organic matter
; fulvic acid
; humic acid
; natural organic matter
; organic carbon
; organic matter
; polymer
; riverine organic matter
; sea water
; surface water
; unclassified drug
; Article
; controlled study
; cross linking
; gel
; molecular weight
; particle size
; priority journal
; reduction (chemistry)
; sedimentation
; static electricity
; surface charge
; surface property
; water sampling
; zeta potential
英文摘要: Rivers drive large amounts of terrestrial and riverine organic matter into oceans. These organic materials may alter the self-assembly of marine dissolved organic matter (DOM) polymers into microgels and can even affect the behavior of existing natural microgels. We used Suwannee River humic acid, fulvic acid, and natural organic matter as a model of riverine organic matter (ROM) to investigate the impacts of ROM input on DOM polymer and microgel conversion. Our results indicated that the release of extra ROM, even at low concentrations (0.1–10 mg L−1), into the marine organic matter pool decreased the size of self-assembled DOM polymers (from 4–5 μm to < 1 μm) and dispersed the existing natural microgels into smaller particles (from 4–5 μm to 2–3 μm). The particle size of the microgel phase was also less sensitive than that of the DOM polymers to external changes (addition of ROM). This size reduction in DOM aggregation and existing microgels may be closely tied to the surface chemistry of the organic matter, such as negative surface charge stabilization and Ca2+ cross-linking bridges. These findings reveal that ROM inputs may therefore impede the self-assembly of DOM polymers into particulate organic matter and reduce the sedimentation flux of organic carbon and other elements from surface water to the deep ocean, thereby disturbing the biological pump, the downward transportation of nutrients, and the marine organic carbon cycle. © 2017 Elsevier Ltd Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/113020
Appears in Collections: 气候减缓与适应
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作者单位: Department of Marine Environment and Engineering, National Sun Yat-sen University, Kaohsiung, Taiwan; Department of Public Health, College of Health Science, Kaohsiung Medical University, Kaohsiung, Taiwan; Asia-Pacific Ocean Research Center, National Sun Yat-sen University, Kaohsiung, Taiwan; Research Center for Environmental Medicine, Kaohsiung Medical University, Kaohsiung, Taiwan; Bioengineering Program, School of Engineering, University of California, Merced, Merced, CA, United States
Recommended Citation:
Shiu R.-F.,Lee C.-L.,Chin W.-C.. Reduction in the exchange of coastal dissolved organic matter and microgels by inputs of extra riverine organic matter[J]. Water Research,2018-01-01,131