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Occurrence and bioaccumulation of persistent toxic substances in sediments and biota from intertidal zone of Abu Ali Island, Arabian Gulf

Yoon, Seo Joon, Hong, Seongjin, Kim, Taewoo, Lee, Junghyun, Kwon, Bong-Oh, Allam, Ahmed A., Al-khedhairy, Abdulaziz A., Khim, Jong Seong
Marine pollution bulletin 2019 v.144 pp. 243-252
bioaccumulation, exogenous sources, guidelines, littoral zone, nonylphenols, petroleum, polycyclic aromatic hydrocarbons, remediation, sediments, styrene, toxic substances, tributyltin, water pollution, Persian Gulf
North Abu Ali Island is contaminated by crude oil from exogenous sources with a variety of persistent toxic substances (PTSs) being input into intertidal sediments. We detected an array of PTSs in sediments and benthic biota off north Abu Ali Island (Arabian Gulf), including 35 polycyclic aromatic hydrocarbons (PAHs), 6 alkylphenols (APEOs), 10 styrene oligomers (SOs), and tributyltin. The PTS concentrations were generally greater than those reported in other areas of Arabian Gulf. PAHs mainly originated from petrogenic sources, and APEOs and SOs seem to be of recent origin. Field-based biota-sediment accumulation factors (BSAF) varied by taxa and compounds, but clearly depended on the log Kow values of individual compounds. Some PTSs exceeded the established guidelines for sediments and biota; we found particularly great BSAFs for alkyl-naphthalenes (C1- and C2-), nonylphenol monoethoxylates, and 2,4,6-triphenyl-1-hexene. Remediation will require on-site clean-up of toxic chemicals together with immediate efforts on preventing input of current pollution sources in the given area.