Time Domain Reflectometry Estimation of Electrical Conductivity and Heavy Metal Concentration in Contaminated Sediments

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基本資料

Project title

Code/計畫編號

MOST103-2116-M019-001

Translated Name/計畫中文名

利用時域反射儀推估底泥重金屬污染物導電度與濃度之研究

Project Coordinator/計畫主持人

Yung-Chia Chiu

Funding Organization/主管機關

National Science and Technology Council

Department/Unit

Institute of Earth Sciences

Website

https://www.grb.gov.tw/search/planDetail?id=8323407

Year

2014

Start date/計畫起

01-08-2014

Expected Completion/計畫迄

31-07-2015

Bugetid/研究經費

1485千元

ResearchField/研究領域

地球科學
環境科學

"近年來國內陸續發現不少水體底泥受到污染的事件，而重金屬為常見之底泥污染物之一，由於污染場址特性各異，在調查過程中，往往造成其濃度分佈與污染範圍判識上之困難。傳統上底泥重金屬污染檢測多以直接採樣之方法進行，但受限於人力、金錢與時間上之成本考量，無法大量且快速的量測底泥中重金屬污染物濃度相關資料，造成在評估污染物濃度及其分佈上之困難，甚而難以確實掌握其傳輸途徑。有鑑於非破壞性的地球物理探測方法逐漸受到重視，本專題計畫驥望藉由室內砂箱實驗與野外現地試驗進行非破壞性時域反射儀（TDR）之底泥重金屬濃度量測分析。透過土壤試體靜態實驗數據，針對不同濃度重金屬溶液、土壤顆粒組成、土壤含水量及土壤溫度，探討參數間之相互影響，並以定量的方式描述其間之關係。經由動態砂箱實驗過程，瞭解重金屬污染物於底泥中之時空變化及傳輸途徑，研析水文地質參數對其濃度量測結果之影響。經由野外現地試驗，針對 TDR金屬探頭之塗料改進及水下 TDR探頭之創新設計，將可增進 TDR 之量測範圍，延伸其應用環境。本專題計畫期望經由一系列之試驗，建立 TDR污染物標準調查流程，利用創新之 TDR探頭設計，延伸污染物監測種類，期望提供往後污染物調查與整治之資訊及建議。""Plenty of contaminated sediments have been found recently in Taiwan and heavy metals are one of most common contaminants in it. Because of complex site characterizations and heterogeneous geological conditions, it is still a challenge to identify the distributions of heavy-metal concentrations. Traditionally, the concentrations of heavy metal are measured based on coring or sampling; however, it is very hard to obtain sufficient data due to limited labor, budget, and time, and results in the difficulty of assessing the contaminant distribution. In view of the increasing importance of non-destructive geophysical methods in recent years, in this study, the time domain reflectometry (TDR) technique will be selected to estimate the electrical conductivities and concentrations of heavy metal through laboratory and field experiments. Different heavy-metal concentrations, soil compositions, water contents, and soil temperature will be conducted on the laboratory experiments. Their correlation will be analyzed and the empirical equations will be established, quantitatively. Spatial and temporal variations of heavy-metal concentrations and associated transport mechanisms will be analyzed through dynamic sandbox experiments. The relations between hydrological parameters and measurements will be also addressed in detail. The innovative designs of partial coated TDR probes and underwater probes will also be implemented in situ in this study to extend the applications of TDR. Finally, through a systematic design, careful experiment, and theoretical analysis, a standard procedure for measuring heavy-metal contaminant in the sediments using the TDR technique with innovative probes will be developed. The works developed in this study can provide as reference tools for contaminant site investigation and remediation assessment in the future."

Keyword(s)

時域反射儀
導電度
污染物濃度
重金屬
底泥
Time domain reflectometry
electrical conductivity
contaminant concentration
heavy metal
sediments

DSpace CRIS

Time Domain Reflectometry Estimation of Electrical Conductivity and Heavy Metal Concentration in Contaminated Sediments

基本資料

Description