Environmental Pollution, 131 (2004) pp. 401-408

Từ Thư viện Khoa học VLOS
Bước tới: chuyển hướng, tìm kiếm
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Concentrations of organotin compounds in sediment and clams collected from coastal areas in Vietnam
 Tạp chí Environmental Pollution 2004 June 7; 131 (3):401-408
 Tác giả   Sayaka Midorikawaa, Takaomi Araia, Hiroya Harinob, Madoka Ohjia, Nguyen Duc Cuc and Nobuyuki Miyazakia a
 Nơi thực hiện   aInternational Coastal Research Center, Ocean Research Institute, The University of Tokyo, 2-106-1, Akahama, Otsuchi, Iwate 028-1102, Japan

bOsaka City Institute of Public Health and Environmental Science, 8-34, Tojo, Tennoji, Osaka 543-0026, Japan c Haiphong Institute of Oceanology, Vietnam National Center for Natural Science and Technology, 246 Danang street, Haiphong, Viet Nam

 Từ khóa   Organotin compounds,TBT,Sediment, Clam,Contamination, Vietnam
  DOI   URL  [ PDF]

English

Levels of butyltin (BT) and phenyltin (PT) compounds were determined in sediments and clam Meretrix spp. collected from north and central coastal areas in Vietnam. Concentrations of TBT in sediments ranged from 0.89 to 34 ng g−1 dry wt and those in clams ranged from 1.4 to 56 ng g−1 wet wt. The levels of TBT in sediments and clams from Vietnam were within limits reported from other countries. Further, the TBT level in clams was lower than the tolerable average residue level (TARL) estimated based on tolerable daily intake (TDI). Trace amounts of PTs were also found in both sediment and clam samples. In sediments from north and central Vietnam, the concentrations of TBT were highest in the order of Hue (28 ng g−1 dry wt), Cua Luc (15 ng g−1 dry wt), Sam Son (6.3 ng g−1 dry wt), and Tra Co (5.5 ng g−1 dry wt). Among the clams from north and central Vietnam, the levels of TBT in clams from Cua Luc were dramatically high at 47 ng g−1 wet wt. TBT formed the principal butyltin species in sediment at all sites studied. The ratios of TBT in sediment were higher among BT compounds at all study sites. Of total BTs, TBT was the dominant species in clams from almost all sites studied. In spatial distribution, TPT showed a pattern similar to TBT, suggesting the use of TPT as an antifouling paint. The partition coefficient between sediment and calms was calculated. The partition coefficients of TBT and TPT were 2.01 (0.56–5.5) and 9.23 (3.1–20), respectively. These results show that sediment-bound TBT is a source of contamination to clams in addition to dissolved TBT.

Tiếng Việt

Hàm lượng của các chất butyltin (BT) và phenyltin (PT)được xác định trong sa lắng và trong con trai mà được thu thập từ các vùng bờ biển miền Bắc và miền Trung của Việt Nam. Nồng độ của TBT trong sa lắng đo được là 0.89 - 34 ng/g và trong con trai là 1.4 - 56 ng/g. Hàm lượng TBT trong sa lắng và trong con trai của Việt Nam vẫn trong giới hạn được dự báo từ các quốc gia khác. Hơn nữa, hàm lượng TBT trong con trai thấp hơn hàm lượng cặn trung bình