語系:
繁體中文
English
說明(常見問題)
回圖書館首頁
手機版館藏查詢
登入
回首頁
到查詢結果
[ subject:"Environmental science." ]
切換:
標籤
|
MARC模式
|
ISBD
Persistent organic pollutants in the...
~
Sun, Caoxin.
FindBook
Google Book
Amazon
博客來
Persistent organic pollutants in the Arctic, Atlantic and Pacific Oceans.
紀錄類型:
書目-電子資源 : Monograph/item
正題名/作者:
Persistent organic pollutants in the Arctic, Atlantic and Pacific Oceans./
作者:
Sun, Caoxin.
出版者:
Ann Arbor : ProQuest Dissertations & Theses, : 2015,
面頁冊數:
108 p.
附註:
Source: Masters Abstracts International, Volume: 55-02.
Contained By:
Masters Abstracts International55-02(E).
標題:
Environmental science. -
電子資源:
http://pqdd.sinica.edu.tw/twdaoapp/servlet/advanced?query=1603345
ISBN:
9781339215020
Persistent organic pollutants in the Arctic, Atlantic and Pacific Oceans.
Sun, Caoxin.
Persistent organic pollutants in the Arctic, Atlantic and Pacific Oceans.
- Ann Arbor : ProQuest Dissertations & Theses, 2015 - 108 p.
Source: Masters Abstracts International, Volume: 55-02.
Thesis (M.S.)--University of Rhode Island, 2015.
This item is not available from ProQuest Dissertations & Theses.
Persistent organic pollutants (POPs) are a group of compounds that are persistent, toxic, bioaccumulative and undergo long range transport. Polychlorinated biphenyls (PCBs), organochlorine pesticides (OCPs) and polybrominated diphenyl ethers (PBDEs) are three groups of POPs. They were widely used as dielectric and coolants fluids, pesticides and flame retardants, respectively. Polycyclic aromatic hydrocarbons (PAHs), normally produced by incomplete combustion of carbonaceous materials, were not in the list but have similar properties as POPs. Even though restrictions and bans over POPs started decades ago (PCBs and OCPs in the 1970s and BDEs in the 2000s), POPs are still detected in the environment and could negatively affect human and wildlife health. Previous studies of POPs monitoring were mostly focused on land or coastal areas; POPs data in remote oceans are lacking. In this study, polyethylene passive samplers (PEs) were used for measuring POPs in the Atlantic and Pacific. The Atlantic study involved deep ocean measurements, while the Pacific study used surface seawater and atmosphere measurements. Deep ocean measurements were conducted by deep moorings at two locations, in the North and Tropical Atlantic Ocean. Results revealed the presence of POPs in the deep ocean with concentrations up to 10 pg L-1 for PCBs, OCPs and BDEs. Oceanic current study suggested that the concentration maximum around 800 m at the Tropical Atlantic site could be potentially originated from the Mediterranean Sea. Mass balance calculation indicated that deep ocean is an important storage for POPs (4.8-26 % of the global HCB environmental burdens). The Pacific study measured both gas-phase and dissolved phase POPs in the Pacific. Atmospheric and oceanic concentrations of PCBs were detected at the magnitude of 1 pg m-3 and 0.1 pg L-1 respectively, except for PCB-8 which was detected at concentrations 10 times higher. HCB dominated in the gas phase (∼300 pg m-3), while alpha -HCH dominated in the dissolved phase (∼100 pg L-1). Large variations of BDEs and PAHs concentrations in either phase were found and were higher than most reported values. Close to equilibrium state of PCBs and OCPs were found in the oligotrophic Pacific. Absolute air-water exchange fluxes were <0.4 ng m-2 day-1 for PCBs and <4.5 ng m-2 day-1 for OCPs. Net air-water exchange gradients strongly favored gas-phase deposition of PBDEs into the water, while mixed gradients were found for PAHs.
ISBN: 9781339215020Subjects--Topical Terms:
677245
Environmental science.
Persistent organic pollutants in the Arctic, Atlantic and Pacific Oceans.
LDR
:03429nmm a2200289 4500
001
2121052
005
20170724102941.5
008
180830s2015 ||||||||||||||||| ||eng d
020
$a
9781339215020
035
$a
(MiAaPQ)AAI1603345
035
$a
AAI1603345
040
$a
MiAaPQ
$c
MiAaPQ
100
1
$a
Sun, Caoxin.
$3
3283043
245
1 0
$a
Persistent organic pollutants in the Arctic, Atlantic and Pacific Oceans.
260
1
$a
Ann Arbor :
$b
ProQuest Dissertations & Theses,
$c
2015
300
$a
108 p.
500
$a
Source: Masters Abstracts International, Volume: 55-02.
500
$a
Adviser: Rainer Lohmann.
502
$a
Thesis (M.S.)--University of Rhode Island, 2015.
506
$a
This item is not available from ProQuest Dissertations & Theses.
520
$a
Persistent organic pollutants (POPs) are a group of compounds that are persistent, toxic, bioaccumulative and undergo long range transport. Polychlorinated biphenyls (PCBs), organochlorine pesticides (OCPs) and polybrominated diphenyl ethers (PBDEs) are three groups of POPs. They were widely used as dielectric and coolants fluids, pesticides and flame retardants, respectively. Polycyclic aromatic hydrocarbons (PAHs), normally produced by incomplete combustion of carbonaceous materials, were not in the list but have similar properties as POPs. Even though restrictions and bans over POPs started decades ago (PCBs and OCPs in the 1970s and BDEs in the 2000s), POPs are still detected in the environment and could negatively affect human and wildlife health. Previous studies of POPs monitoring were mostly focused on land or coastal areas; POPs data in remote oceans are lacking. In this study, polyethylene passive samplers (PEs) were used for measuring POPs in the Atlantic and Pacific. The Atlantic study involved deep ocean measurements, while the Pacific study used surface seawater and atmosphere measurements. Deep ocean measurements were conducted by deep moorings at two locations, in the North and Tropical Atlantic Ocean. Results revealed the presence of POPs in the deep ocean with concentrations up to 10 pg L-1 for PCBs, OCPs and BDEs. Oceanic current study suggested that the concentration maximum around 800 m at the Tropical Atlantic site could be potentially originated from the Mediterranean Sea. Mass balance calculation indicated that deep ocean is an important storage for POPs (4.8-26 % of the global HCB environmental burdens). The Pacific study measured both gas-phase and dissolved phase POPs in the Pacific. Atmospheric and oceanic concentrations of PCBs were detected at the magnitude of 1 pg m-3 and 0.1 pg L-1 respectively, except for PCB-8 which was detected at concentrations 10 times higher. HCB dominated in the gas phase (∼300 pg m-3), while alpha -HCH dominated in the dissolved phase (∼100 pg L-1). Large variations of BDEs and PAHs concentrations in either phase were found and were higher than most reported values. Close to equilibrium state of PCBs and OCPs were found in the oligotrophic Pacific. Absolute air-water exchange fluxes were <0.4 ng m-2 day-1 for PCBs and <4.5 ng m-2 day-1 for OCPs. Net air-water exchange gradients strongly favored gas-phase deposition of PBDEs into the water, while mixed gradients were found for PAHs.
590
$a
School code: 0186.
650
4
$a
Environmental science.
$3
677245
690
$a
0768
710
2
$a
University of Rhode Island.
$b
Oceanography.
$3
2101394
773
0
$t
Masters Abstracts International
$g
55-02(E).
790
$a
0186
791
$a
M.S.
792
$a
2015
793
$a
English
856
4 0
$u
http://pqdd.sinica.edu.tw/twdaoapp/servlet/advanced?query=1603345
筆 0 讀者評論
館藏地:
全部
電子資源
出版年:
卷號:
館藏
1 筆 • 頁數 1 •
1
條碼號
典藏地名稱
館藏流通類別
資料類型
索書號
使用類型
借閱狀態
預約狀態
備註欄
附件
W9331669
電子資源
01.外借(書)_YB
電子書
EB
一般使用(Normal)
在架
0
1 筆 • 頁數 1 •
1
多媒體
評論
新增評論
分享你的心得
Export
取書館
處理中
...
變更密碼
登入