气候变化领域集成服务门户(CCPortal): Planar optode: A two-dimensional imaging technique for studying spatial-temporal dynamics of solutes in sediment and soil

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DOI	10.1016/j.earscirev.2019.102916
	Planar optode: A two-dimensional imaging technique for studying spatial-temporal dynamics of solutes in sediment and soil
	Li C.; Ding S.; Yang L.; Zhu Q.; Chen M.; Tsang D.C.W.; Cai G.; Feng C.; Wang Y.; Zhang C.
发表日期	2019
ISSN	00128252
卷号	197
英文摘要	A two-dimensional (2D) imaging technique, planar optode (PO) technique, is developed to investigate biogeochemical processes at a high resolution in heterogeneous sediments and soils, especially at the sediment-water interface. Compositional changes with depth in sediments are usually considered to be relatively steady. However, the activities of benthic organisms can generate significant heterogeneity and complex 3D transport-reaction patterns over millimeter to meter scales in the surficial sediments. Spatial and temporal quantification of the variables such as O2 in the bioturbated sediments promoted the development of the planar optode. Different planar optode techniques including composite planar optode for multi-analytes and the combination of planar optode with diffusive gradients in thin films (DGT) have been developed and used to study the 2D solutes distributions and/or dynamics of O2, pH, partial pressure of CO2 (pCO2), temperature, exoenzymes, and metal/metalloid ions in sediments and soils. New findings observed in laboratory-based microcosm experiments and field-based in situ studies using planar optode techniques, have significantly improved our understanding of heterogeneous biogeochemical reactions and processes. In this article we provide a critical review on the: 1) research progress using planar optode techniques; 2) principles, configurations, and devices used for planar optode systems; 3) characteristics and interferences associated with planar optode measurements; and 4) applications of planar optode in the environment. We have suggested the barriers, advantages, and research needs for the use of planar optodes. © 2019 Elsevier B.V.
关键词	Biogeochemical process High resolution sensing Planar optical sensor Sediment quality evaluation Sediment/soil remediation
英文关键词	biogeochemical cycle; heterogeneous medium; image resolution; sediment transport; soil remediation; spatiotemporal analysis; two-dimensional modeling
语种	英语
来源期刊	Earth Science Reviews
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/203472
作者单位	School of Water Conservancy and Environment, University of Jinan, Jinan, 250022, China; State Key Laboratory of Lake Science and Environment, Nanjing Institute of Geography and Limnology, Chinese Academy of Sciences, Nanjing, 210008, China; School of Marine and Atmospheric Sciences, Stony Brook University, New York, 11794-5000, United States; Department of Civil and Environmental Engineering, The Hong Kong Polytechnic University, Hung Hom, Kowloon, Hong Kong; Institute of Optics and Electronics, Chinese Academy of Sciences, Chengdu, 610000, China; Nanjing EasySensor Environmental Technology Co., Ltd, Nanjing, 210018, China; International Network for Environment and Health, School of Geography and Archaeology & Ryan Institute, National University of Ireland, Galway, Ireland
推荐引用方式 GB/T 7714	Li C.,Ding S.,Yang L.,et al. Planar optode: A two-dimensional imaging technique for studying spatial-temporal dynamics of solutes in sediment and soil[J],2019,197.
APA	Li C..,Ding S..,Yang L..,Zhu Q..,Chen M..,...&Zhang C..(2019).Planar optode: A two-dimensional imaging technique for studying spatial-temporal dynamics of solutes in sediment and soil.Earth Science Reviews,197.
MLA	Li C.,et al."Planar optode: A two-dimensional imaging technique for studying spatial-temporal dynamics of solutes in sediment and soil".Earth Science Reviews 197(2019).