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题名: Mechanisms of enhanced inorganic phosphorus accumulation by periphyton in paddy fields as affected by calcium and ferrous ions
作者: Li, Jiu-yu1, 2; Deng, Kai-ying1; Hesterberg, Dean2; Xia, Yong-qiu1; Wu, Chen-xi3; Xu, Ren-kou1
关键词: Ca(II) ; Fe(II) ; Periphyton ; Phosphate precipitation ; Calcite ; Ferric hydroxide
刊名: SCIENCE OF THE TOTAL ENVIRONMENT
发表日期: 2017-12-31
DOI: 10.1016/j.scitotenv.2017.07.117
卷: 609, 页:466-475
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 effect of periphyton propagation in paddy fields on phosphorus biogeochemical cycling has received little attention. In this phytotron study, inorganic phosphorus (P-i) accumulation by periphyton was investigated for varying inputs of calcium[Ca(II)] or ferrous iron [Fe(II)], and lighting conditions. Results indicated that additions of Ca(II) or Fe(II) enhanced abiotic accumulation of P-i by up to 16 times, and decreased solution P-i concentration by up to 50%, especially under light condition. The enhanced P-i accumulation into periphyton intensified with increasing P-i concentration, and P-i accumulation showed a positive linear relationship with Ca or Fe accumulation. Abiotic accumulation of P-i induced by Ca(II) was mainly through Ca-phosphate precipitation, and co-precipitation of P with carbonates at pH > 8. Accumulation with added Fe(II) was mainly considered to be through Fe(III) phosphate precipitation coupled with adsorption of P-i by ferric hydroxides. Moreover, Fe(II) was more effective than Ca(II) in promoting abiotic accumulation of P-i by periphyton. Our results indicate the potential for controlling environmental factors to enhance the role of periphyton in biogeochemical cycling and P-use efficiency in paddy rice fields and to reduce P discharged to neighboring water bodies. (C) 2017 Elsevier B.V. All rights reserved.
关键词[WOS]: WASTE-WATER ; PHOSPHATE ; REMOVAL ; SOIL ; ADSORPTION ; SEDIMENTS ; BIOFILMS ; LAKE ; BIOAVAILABILITY ; BIOREMEDIATION
语种: 英语
项目资助者: State Key Basic Research Program of China(2015CB158200) ; National Natural Science Foundation of China(41271010) ; Youth Innovation Promotion Association, CAS ; Chinese Government Scholarship ; North Carolina Agricultural Research Service
WOS记录号: WOS:000410352900051
ISSN号: 0048-9697
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内容类型: 期刊论文
URI标识: http://ir.ihb.ac.cn/handle/342005/35062
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.Chinese Acad Sci, State Key Lab Soil & Sustainable Agr, Inst Soil Sci, Nanjing 21008, Jiangsu, Peoples R China
2.North Carolina State Univ, Dept Crop & Soil Sci, Raleigh, NC 27695 USA
3.Chinese Acad Sci, State Key Lab Freshwater Ecol & Biotechnol, Inst Hydrobiol, Wuhan 430072, Hubei, Peoples R China
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