Title page for etd-0906114-012358


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URN etd-0906114-012358
Author Su-Hung Huang
Author's Email Address No Public.
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Department Environmental Engineering
Year 2014
Semester 1
Degree Master
Type of Document
Language zh-TW.Big5 Chinese
Title The Occurrence of Pharmaceuticals and Phthalate Esters in Gaoping River and the Use of Carbon Adsorbents for the Removal of Emerging Contaminants of Concern in the River Water
Date of Defense 2014-07-16
Page Count 236
Keyword
  • Adsorption kinetics
  • Adsorption isotherm
  • River water quality
  • Pharmaceuticals
  • Phthalate esters
  • Abstract The objectives of this research are two-fold: (1) to understand the current conditions of the Gaoping River through the investigation of occurrence and residual concentrations of 36 emerging contaminants (ECs) of concern including pharmaceuticals (i.e., 18 antibiotics and 10 non-antibiotics) and eight phthalate esters (PAEs) of concern; and (2) to understand the adsorption behaviors of selected ECs by two carbonaceous adsorbents (i.e., powdered activated carbon, PAC; and multi-walled carbon nanotubes, MWCNTs) first in model solutions and then in actual river water. It was found that four antibiotics (i.e., cefalexin, erythromycin, lincomycin, and tylosin), two non-antibiotics (i.e., acetaminophen and caffeine), and three PAEs (i.e, di-n-butyl phthalate, DnBP; di-(2-ethylhexyl) phthalate, DEHP; and diisononyl phthalate, DiNP) are often detected in the water samples obtained from the midstream and downstream of the Gaoping River, with the highest concentrations of 3,533 ng/L and 4,938 ng/L for lincomycin and caffeine, respectively. On the other hand, for two selected adsorbents the adsorption results in model solutions revealed that the Freundlich isotherm is better fitted as compared with the Langmuir isotherm. Their adsorption kinetics also better fitted with the pseudo-second-order model. Further, actual river water samples collected from two highly polluted sampling sites, namely Jiouru Bridge over the Wuluo River and Beinoon Bridge over the Niouchou River were tested for evaluating the removal efficiencies of target ECs by the above-indicated adsorbents. It was found that MWCNTs outperformed PAC if the adsorption was only conducted for a short time like 3 hours. Under the conditions of a higher adsorbent dose (e.g., 0.7 g/L) and a longer adsorption time (e.g., 9 hours), however, both adsorbents yielded comparable removal efficiencies ranging from 75-90% for ECs of concern.
    Advisory Committee
  • Ching Yuan - chair
  • Chiung-Fen Chang - co-chair
  • Gordon C. C. Yang - advisor
  • Files
  • etd-0906114-012358.pdf
  • Indicate in-campus at 5 year and off-campus access at 5 year.
    Date of Submission 2014-10-06

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