DOI: 10.1016/j.marpolbul.2016.02.026
Scopus记录号: 2-s2.0-84973137232
论文题名: Geochemistry and bioavailability of mudflats and mangrove sediments and their effect on bioaccumulation in selected organisms within a tropical (Zuari) estuary, Goa, India
作者: Dias H.Q. ; Nayak G.N.
刊名: Marine Pollution Bulletin
ISSN: 0025-326X
EISSN: 1879-3363
出版年: 2016
卷: 105, 期: 1 起始页码: 227
结束页码: 236
语种: 英语
英文关键词: Bioavailability
; Metals
; Mollusks
; Sediment
; Speciation
Scopus关键词: Bioaccumulation
; Biochemistry
; Estuaries
; Manganese
; Marine pollution
; Metals
; Molluscs
; Nickel
; Pollution
; Sediments
; Toxicity
; Trace analysis
; Trace elements
; Zinc
; Aquatic environments
; Bioavailability
; Comparative evaluations
; Mangrove sediments
; Mollusks
; Sediment accumulation
; Speciation
; Trace metal concentration
; Copper
; cobalt
; copper
; iron
; manganese
; nickel
; organic carbon
; zinc
; heavy metal
; metal
; water pollutant
; bioaccumulation
; bioavailability
; concentration (composition)
; geochemistry
; mangrove
; marine pollution
; marine sediment
; mollusc
; mudflat
; speciation (chemistry)
; Article
; bioaccumulation
; bioavailability
; comparative study
; controlled study
; ecotoxicity
; estuary
; gastropod
; geochemistry
; India
; metal extraction
; mollusc
; nonhuman
; particle size
; physical chemistry
; sediment
; analysis
; biota
; chemistry
; environmental monitoring
; estuary
; fractionation
; season
; water pollutant
; wetland
; Goa
; India
; Zuari Estuary
; Bivalvia
; Gastropoda
; Mollusca
; Biota
; Chemical Fractionation
; Environmental Monitoring
; Estuaries
; Geologic Sediments
; India
; Metals
; Metals, Heavy
; Seasons
; Water Pollutants, Chemical
; Wetlands
Scopus学科分类: Agricultural and Biological Sciences: Aquatic Science
; Earth and Planetary Sciences: Oceanography
; Environmental Science: Pollution
英文摘要: Metals are non-degradable in the aquatic environment and play a vital role in estuarine biogeochemistry but could also be detrimental to associated biota. A comparative evaluation of the trace metal concentrations (Fe, Mn, Zn, Cu, Ni, and Co) was carried out in the Zuari estuary, Goa during the post-monsoon season of 2013 at six locations, each representing three mangrove and three mudflat regions. In addition, fractionation of trace metals in sediments was performed to provide information on the mobility, distribution, bioavailability and toxicity. Special attention was paid to the marine mollusks viz. bivalves and gastropods that are extensively used as bio-indicators in coastal pollution. Considering the percentage of metals in the sequentially extracted fractions, the order of mobility from most to least bioavailable forms was Mn > Zn > Cu > Ni > Co > Fe. Mn maintained high bioavailability (average around 60%) in Fe-Mn oxide and carbonate bound forms indicating that Mn is readily available for biota uptake. The bioavailability of Fe was on an average of around 6% whereas other metals like Cu, Zn, Ni and Co were around 19% to 34%. When the bioavailable values were compared with standard Screening Quick Reference Table (SQUIRT), Zn showed higher toxicity level and bioavailability in the lower estuary. On the basis of calculated Bio Sediment Accumulation Factors (BSAF's), overall trend in bioaccumulation was in the order of Cu > Zn > Mn > Ni > Co > Fe. Metal Pollution Index (MPI) computed was higher for gastropods than bivalves. © 2016 Elsevier Ltd. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/87135
Appears in Collections: 过去全球变化的重建 全球变化的国际研究计划
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作者单位: Marine Sciences Department, Goa University, Goa, India; National Institute of Oceanography, Regional Centre Mumbai, India
Recommended Citation:
Dias H.Q.,Nayak G.N.. Geochemistry and bioavailability of mudflats and mangrove sediments and their effect on bioaccumulation in selected organisms within a tropical (Zuari) estuary, Goa, India[J]. Marine Pollution Bulletin,2016-01-01,105(1)