Title page for etd-0715117-210822


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URN etd-0715117-210822
Author Yen-yu Chang
Author's Email Address No Public.
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Department Environmental Engineering
Year 2016
Semester 2
Degree Master
Type of Document
Language zh-TW.Big5 Chinese
Title Distribution of heavy metals in sediments of Love River
Date of Defense 2017-07-28
Page Count 88
Keyword
  • sediment
  • enrichment factor
  • Love River
  • heavy metals
  • Abstract Due to the growth of economy and living standards in Taiwan, various pollutants will increase, and many of the factories' wastewater and people's livelihoods will directly or indirectly enter the water body under untreated conditions, causing the impact of water environment. The commonly found pollutants in water bodies include heavy metals, insecticide agents and other harmful substances accompanied by a large number of untreated or treated wastewaters, which result in significant deterioration of water quality. Sediments are the final sinks of the pollutants. In this study, water and sediment sampling was performed and assessed for the Love River. The enrichment factor (Enrichment Factor, EF) was used to evaluate the heavy metal pollution. The extent of heavy metal content in the sediment to the biological hazard was assessed. The results show that the water quality of the upstream section of the river was higher than that of the middle and lower reaches, and the assessment index was between moderate pollution and serious pollution. This might be due to the facts that there were untreated wastewaters (containing high concentrations of ammonia and biochemical oxygen demand) flowed into the main stream, which resulted in the deterioration of the water quality. Results show that Cu and Zn in upstream and mid-stream sediments and Ni in downstream sediments were higher than the sediment standards. Results from the toxicity analyses show that the toxicity was in ERL-ERM levels, which had less impact on the ecosystem. The EF value for Cd reached 31.9 during the early investigation period at the Ho-Gang Bride station, then the value slowly dropped in the latter part of the investigation. Higher EF value for As was observed at the Long-Sing Bridge and Chi-hang Bridge stations. Decreased EF values were observed at these two stations in the last sampling season. Thus, the impacts of the heavy metals to the ecosystem was not significant. Results from this study are helpful in developing appropriate river and sediment management strategies.
    Advisory Committee
  • Ming-Shean Chou - chair
  • Andy Hong - co-chair
  • Hua-Shan Tai - co-chair
  • Chengdi Dong - co-chair
  • Jimmy C. M. Kao - advisor
  • Files
  • etd-0715117-210822.pdf
  • Indicate in-campus at 99 year and off-campus access at 99 year.
    Date of Submission 2017-08-16

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