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题名: The role of Fe(III) on phosphate released during the photo-decomposition of organic phosphorus in deionized and natural waters
作者: Jiang, Yongcan1; Kang, Naixin1; Zhou, Yiyong2; Liu, Guanglong1, 2; Zhu, Duanwei1
关键词: Glyphosate ; Phosphate ; Fe3+ ; Hydroxyl radicals ; Natural water
刊名: CHEMOSPHERE
发表日期: 2016-12-01
DOI: 10.1016/j.chemosphere.2016.08.096
卷: 164, 页:208-214
收录类别: SCI
文章类型: Article
WOS标题词: Science & Technology ; Life Sciences & Biomedicine
类目[WOS]: Environmental Sciences
研究领域[WOS]: Environmental Sciences & Ecology
英文摘要: The photo-decomposition of organic phosphorus is an important route for the phosphorus cycle by which phosphate is regenerated in the aquatic environment. In this study, the role of Fe3+ as a natural photosensitizer toward the decomposition of organic phosphorus to release phosphate was examined in deionized and natural waters under UV and sunlight irradiation using glyphosate as the organic phosphorus model. The results showed that the concentration of glyphosate decreased with irradiation time in the Fe3+/UV and Fe3+/sunlight systems and TOC gradually decreased, which confirmed that glyphosate was degraded by Fe3+. The amount of phosphate released from the photo-decomposition of glyphosate was higher in the presence of Fe3+ than that of the control experiment under UV and sunlight irradiation conditions, and the generation rate of phosphate also increased with increasing Fe3+ concentrations. The formation of hydroxyl radicals (center dot OH) in the Fe3+/UV and Fe3+/sunlight systems was identified according to the photoluminescence spectra (PL) using coumarin as the trapping molecule, and the steady-state concentrations of center dot OH for the Fe3+/UV and Fe3+/sunlight systems were 1.06 x 10(-14) M and 0.09 x 10(-14) M, respectively. When natural water was spiked with glyphosate and Fe3+, the phosphate that was released in the Fe3+ was higher than that of the control, and the phosphate that was released was inhibited when isopropanol was added to the reaction. All of these results demonstrate that the photochemical activity of Fe3+ has significantly impact in the release of phosphate from the photo-decomposition of organic phosphorus. (C) 2016 Elsevier Ltd. All rights reserved.
关键词[WOS]: RESUSPENDED SEDIMENTS ; OXIDATIVE-DEGRADATION ; COMPLEX PHOSPHORUS ; AQUEOUS-SOLUTION ; UV-IRRADIATION ; LAKE WATER ; PHOTODEGRADATION ; IRON ; GLYPHOSATE ; TRANSFORMATION
语种: 英语
项目资助者: National Natural Science Foundation of China(41230748 ; Fundamental Research Funds for the Central Universities(2662016PY061) ; Fok Ying Tong Education Foundation, China(151078) ; China Postdoctoral Science Foundation(2013M540619 ; 41401547) ; 2015T80855)
WOS记录号: WOS:000385318200025
ISSN号: 0045-6535
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内容类型: 期刊论文
URI标识: http://ir.ihb.ac.cn/handle/342005/28598
Appears in Collections:水环境工程研究中心_期刊论文

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作者单位: 1.Huazhong Agr Univ, Coll Resources & Environm, Lab Ecoenvironm Engn Res, Wuhan 430070, Peoples R China
2.Chinese Acad Sci, Inst Hydrobiol, Wuhan 430072, Peoples R China
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