Arsenic and arsenic species in shellfish and finfish from the western Arabian Gulf and consumer health risk assessment.
This study reports the levels of total arsenic and arsenic species in marine biota such as clams (Meretrix meretrix; N=21) and pearl oyster (Pinctada radiata; N=5) collected from nine costal sites in Jan 2014, and cuttlefish (Sepia pharaonis; N=8), shrimp (Penaeus semisulcatus; N=1), and seven commercially important finfish species (N=23) collected during Apr-May 2013 from seven offshore sites in the western Arabian Gulf. Total As and As species such as dimethylarsinic acid (DMA), arsenobetaine (AB), trimethylarsine oxide (TMAO), arsenocholine (AC), tetramethylarsonium ion (Tetra), arsenosugar-glycerol (As-Gly) and inorganic As (iAs) were determined by using ICPMS and HPLC/ICPMS. In bivalves, the total As concentrations ranged from 16 to 118mg/kg dry mass; the toxic iAs fraction contributed on average less than 0.8% of the total As, while the nontoxic AB fraction formed around 58%. Total As concentrations for the remaining seafood (cuttlefish, shrimp and finfish) ranged from 11 to 134mg/kg dry mass and the iAs and AB fractions contributed on average 0.03% and 81% respectively of the total As. There was no significant relationship between the tissue concentrations of total As and iAs in the samples. There was also no significant relationship between As levels in seafood and geographical location or salinity of the waters from which samples were collected. Based on our results, we recommend introducing a maximum permissible level of arsenic in seafood from the Gulf based on iAs content rather than based on total As. Our analyses of cancer risks and non-cancer hazards identified non-negligible risks and the potential for hazards; the greatest risks were identified for expatriate consumers of bivalves and high-end consumers of seafood. Despite this, many uncertainties remain that would be best addressed by further analyses.
Center for Environment and Water, Research Institute, King Fahd University of Petroleum and Minerals, Dhahran 31261, Saudi Arabia. Electronic address: kkumarpk@kfupm.edu.sa.
Periyadan K
PK
Krishnakumar
Center for Environment and Water, Research Institute, King Fahd University of Petroleum and Minerals, Dhahran 31261, Saudi Arabia.
Mohammad A
MA
Qurban
Institute of Chemistry-Analytical Chemistry, NAWI Graz, University of Graz, A-8010 Graz, Austria.
Michael
M
Stiboller
Johns Hopkins Bloomberg School of Public Health, Department of Environmental Health Sciences, Baltimore, MD, USA.
Keeve E
KE
Nachman
Center for Environment and Water, Research Institute, King Fahd University of Petroleum and Minerals, Dhahran 31261, Saudi Arabia.
Thadickal V
TV
Joydas
Center for Environment and Water, Research Institute, King Fahd University of Petroleum and Minerals, Dhahran 31261, Saudi Arabia.
Karuppasamy P
KP
Manikandan
Center for Environment and Water, Research Institute, King Fahd University of Petroleum and Minerals, Dhahran 31261, Saudi Arabia.
Shemsi Ahsan
SA
Mushir
Institute of Chemistry-Analytical Chemistry, NAWI Graz, University of Graz, A-8010 Graz, Austria.
Kevin A
KA
Francesconi
D001151:Arsenic / Q000032:analysis*; D001152:Arsenicals / Q000032:analysis*; D005506:Food Contamination / Q000032:analysis*; D006801:Humans; D018570:Risk Assessment; D012529:Saudi Arabia; D017747:Seafood / Q000032:analysis*; D014874:Water Pollutants, Chemical / Q000032:analysis*
D001152:Arsenicals; D014874:Water Pollutants, Chemical; D001151:Arsenic
Arsenobetaine; Bivalves; Cuttlefish; Inorganic arsenic; Risk assessment; Seafood