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RESEARCH ARTICLE

Bioaccumulation and health risk assessment of polycyclic aromatic hydrocarbons in oyster (Crassostrea sp.) and gastropod (Cymatium sp.) species from the Can Gio Coastal Wetland in Vietnam

Luu Thanh Pham A B F , Thuy Thanh Thi Hoang C , Loan Cam Thi Tu C , Yen Hoang Thi Tran B , Bao Duy Le D , Dong Van Nguyen D , Huy Xuan Do E and Nam Van Thai A
+ Author Affiliations
- Author Affiliations

A Ho Chi Minh City University of Technology (HUTECH), 475A Dien Bien Phu Street, Binh Thanh District, Ho Chi Minh City, Vietnam.

B Institute of Tropical Biology, Vietnam Academy of Science and Technology (VAST), 85 Tran Quoc Toan Street, District 3, Ho Chi Minh City, Vietnam.

C Ho Chi Minh City University of Natural Resources and Environment, 236B Le Van Sy Street, Tan Binh District, Ho Chi Minh City, Vietnam.

D University of Science, Vietnam National University Ho Chi Minh City (VNU-HCM), 227 Nguyen Van Cu Street, District 5, Ho Chi Minh, Vietnam.

E Institute for Environment and Resources, Vietnam National University, 142 To Hien Thanh Street, District 10, Ho Chi Minh City, Vietnam.

F Corresponding author: pt.luu@hutech.edu.vn

Marine and Freshwater Research 71(6) 617-626 https://doi.org/10.1071/MF19055
Submitted: 12 February 2019  Accepted: 17 June 2019   Published: 24 September 2019

Abstract

The aim of this study was to measure polycyclic aromatic hydrocarbons (PAHs) in oysters (Crassostrea sp.) and gastropods (Cymatium sp.) collected from the Can Gio coastal wetland (CGCW), Vietnam. Samples were collected from 14 coastal sites, from both port and non-port sites, during a rainy season (September 2017) and a dry season (April 2018). PAH concentrations in oysters ranged from 3.26 to 64.45 ng g–1 wet weight (WW), whereas in gastropods PAH concentrations ranged from 4.81 to 23.80 ng g–1 WW. Naphthalene was the major component measured in oysters (0.71–46.74 ng g–1 WW), whereas pyrene was the major congener measured in gastropods. Both species showed the same dominant accumulation pattern of two- to three-ring PAH compounds. A temporal and spatial distribution of PAHs in gastropods from the CGCW was also observed: higher PAH concentrations were more frequently observed in oysters and gastropods from port sites during the rainy season. The present study indicates that gastropods Cymatium sp. could be used as bioindicators in tropical coastal areas. Human health risk assessment conducted on the basis of the excess cancer risk suggests that there is no current risk to humans as a result of the consumption of oysters and gastropods.

Additional keywords: aquatic animal, bioindicator, Can Gio Biosphere Reserve, human health.


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