Effect of pH and Salinity on Sorption of Antimony (III and V) on Mangrove Sediment, Sundarban, India
27 Nov 2017-Soil and Sediment Contamination: An International Journal (Taylor & Francis)-Vol. 26, pp 663-674
TL;DR: The extent of toxic metalloid retention and bioavailability and mobility in the sediment is of interest for understanding their biogeochemical cycling and for accurate risk assessment in an ecosyst...
Abstract: The extent of toxic metalloid retention and bioavailability and mobility in the sediment is of interest for understanding their biogeochemical cycling and for accurate risk assessment in an ecosyst...
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289 citations
TL;DR: In this article, the authors studied the biogeochemistry of Sb in the Sundarbans mangroves by measuring Sb concentration in sediment, plant organs, river water, sea water and pore water, and determining Sb fluxes within the ecosystem reservoirs.
Abstract: Antimony (Sb), a naturally occurring trace element, tends to be enriched in the top-soil and contributes to soil contamination due to continued human activities. However, little is known about plant uptake of Sb, its storage in plant biomass and recycling in large littoral zones of tropical regions, subjected to strong anthropogenic impact. Biogeochemistry of Sb has been studied in the world’s largest Sundarbans mangroves by measuring Sb concentration in sediment, plant organs, river water, sea water and pore water, and by determining Sb fluxes within the ecosystem reservoirs. Mangrove estuarine water and sediment appeared to be non-polluted in Sb as confirmed by their ecotoxicological indexes. Sediment represented major pool of Sb (2170 g ha-1) compared to plant biomass (2.2 g ha-1). Antimony concentration (μg kg-1) in mangrove roots was highest (17±6) followed by leaf and wood (10.5±6, 9±4, respectively, n = 24). Species-specific variability in Sb concentration was observed with Aegiceras corniculatum, showing highest concentration (48.8 μg kg-1) and Avicenna marina lowest (16.6 μg kg-1). Riverine input of Sb (9.3 to 12 Mg yr-1) was 3-order of magnitude higher than the mangrove sediment-derived input (0.02 to 0.05 Mg yr-1), suggesting the latter as negligible contributor of Sb to the Sundarbans coastal water. The mass balance calculations demonstrate that 63 to 88% of the annual riverine discharge of Sb export to the Bay of Bengal. Further biogeochemical studies should address Sb transport and speciation in surface waters and pore waters of this region.
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TL;DR: The mobility of antimony (Sb) in Japanese agricultural soils was studied by radiotracer experiments using 124Sb tracer to suggest that one aspect of the Sb sorption phenomena in Japanese soil was influenced by specific adsorption of anions such as phosphate.
83 citations
"Effect of pH and Salinity on Sorpti..." refers background in this paper
...Nakamaru et al. (2006) measured Kd of Sb for 110 Japanese agricultural soil samples ranged from 1 to 2100 L kg¡1 and exhibited a decreasing trend with increasing pH....
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TL;DR: In this article, the authors investigated the distribution of water extractable Sb(III) and Sb (V) species along a Massachusetts highway and found that Sb was the dominant species present in both surface and soil core samples, and was mostly confined to the top 20 cm layer of soil.
68 citations
"Effect of pH and Salinity on Sorpti..." refers background in this paper
...Association of Sb with soil organic matter in environmental samples is of interest (Clemente et al., 2008, Ceriotti and Amarasiriwardena, 2009)....
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TL;DR: The mobility of sediment antimony (Sb) during sediment-water interactions was studied in this article, where emphasis was placed on the fixation of native and added Sb by sediment, long-term (6 months) releases of Sb and sediment properties that affect the mobilization of sb.
63 citations
"Effect of pH and Salinity on Sorpti..." refers background in this paper
...Although Sb is occasionally found with oxyhydroxide fraction of sediment (Brannon and Patrick, 1985) or...
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...Although Sb is occasionally found with oxyhydroxide fraction of sediment (Brannon and Patrick, 1985) or with organic carbon (El Bilali et al., 2002) the geochemical behavior of Sb within mangrove sediment is still largely unknown....
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TL;DR: In this paper, the authors observed inter-annual variations of phytoplankton abundance and community organization along with the ancillary parameters at the land-ocean boundary associated with the Sundarban mangrove forest (21°32′ and 22°40′ N and 88°05′ and 89° E), along the NE Coast of the Bay of Bengal.
Abstract: Inter-annual variations of phytoplankton abundance and community organization were observed over a two-decade period along with the ancillary parameters at the land–ocean boundary associated with the Sundarban mangrove forest (21°32′ and 22°40′ N and 88°05′ and 89° E), along the NE Coast of the Bay of Bengal. The number of definable Bacillariophyceae species exceeded Dinophyceae taxa, and the total number of bloom-forming species declined from a maximum of ten in 2000 and a minimum of two in 2007. Blooms of the diatom Coscinodiscus radiatus were common in 2000 and 2007. Tide cycles and the onset of the monsoon season played important roles in diurnal and seasonal variability of phytoplankton. Phytoplankton biovolume showed seasonality, with the highest levels during post-monsoon periods and lowest levels during the monsoon period. Phytoplankton abundance was correlated to rainfall patterns, which may be altered by long-term changes in climate.
62 citations
TL;DR: In this paper, the authors used a box model approach to assess the nitrogen budget in the Sundarban mangrove ecosystem, which acts as a sink for atmospheric nitrogen in terms of NOx, NH3, N2, and water column dissolved inorganic nitrogen.
56 citations
"Effect of pH and Salinity on Sorpti..." refers background in this paper
...For a more details about climate, ecogeography, flora, and fauna of the sites, refer to Ray et al. (2014)....
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...Sediment Eh (¡32 to ¡220 mV, Ray et al., 2014) was well below the standard and formal reduction electrode potential of Sb (V) / Sb (III) (C0....
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