DOI: 10.1016/j.watres.2018.07.043
Scopus记录号: 2-s2.0-85053062228
论文题名: DOM from mariculture ponds exhibits higher reactivity on photodegradation of sulfonamide antibiotics than from offshore seawaters
作者: Wang J. ; Chen J. ; Qiao X. ; Wang Y. ; Cai X. ; Zhou C. ; Zhang Y. ; Ding G.
刊名: Water Research
ISSN: 431354
出版年: 2018
卷: 144 起始页码: 365
结束页码: 372
语种: 英语
英文关键词: Dissolved organic matter
; Electrodialysis
; Mariculture
; Photodegradation
; Reverse osmosis
; Sulfonamide antibiotics
Scopus关键词: Antibiotics
; Biological materials
; Electrodialysis
; Light absorption
; Photobleaching
; Photodegradation
; Reverse osmosis
; Seawater effects
; Sulfur compounds
; Water pollution
; Carbonyl structure
; Dissolved organic matters
; Fresh water lakes
; Mariculture
; Organic micro-pollutants
; Simulated sunlight
; Steady state concentration
; Sulfonamide antibiotics
; Marine biology
; antibiotics
; concentration (composition)
; dissolved oxygen
; electrokinesis
; freshwater environment
; organic pollutant
; photodegradation
; pollutant removal
; pond
; reverse osmosis
; seawater
; solar radiation
英文摘要: Mariculture activities and river inputs lead to coastal seawaters with DOM levels that are comparable to or even higher than those in terrestrial water bodies. However, effects of seawater DOM, and especially of DOM occurring in areas impacted by mariculture, on photodegradation of organic micropollutants, are largely unknown. In this study, simulated sunlight irradiation experiments were performed to probe the effects of DOM extracted from mariculture impacted seawaters and from offshore areas, on photodegradation of three sulfonamide antibiotics (SAs). Results show that the SAs are transformed mainly by indirect photodegradation induced by triplet excited DOM (3DOM*). Compared with DOM from the more pristine coastal waters, the DOM from mariculture impacted areas undergoes less photobleaching, contains higher percentage of humic-like materials and higher proportions of aromatic and carbonyl structures. Thus, the DOM from mariculture areas exhibits higher rates of light absorption, higher formation quantum yields of 3DOM* higher 3DOM* steady-state concentrations and higher reactivity on photodegradation of the SAs. Photochemistry of the seawater DOM is different from that reported for freshwater lake DOM. This study highlights the importance of probing the effects of DOM from coastal seawaters on photodegradation of organic micropollutants since coastal seawaters are sinks of many aquatic pollutants. © 2018 Elsevier Ltd Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/112508
Appears in Collections: 气候减缓与适应
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作者单位: Key Laboratory of Industrial Ecology and Environmental Engineering (MOE), School of Environmental Science and Technology, Dalian University of Technology, Linggong Road 2, Dalian, 116024, China; Qinghai Institute of Salt Lakes, Chinese Academy of Sciences, Xining, 810008, China; College of Environmental Science and Engineering, Dalian Maritime University, Linghai Road 1, Dalian, 116026, China
Recommended Citation:
Wang J.,Chen J.,Qiao X.,et al. DOM from mariculture ponds exhibits higher reactivity on photodegradation of sulfonamide antibiotics than from offshore seawaters[J]. Water Research,2018-01-01,144