Effect of pH and Salinity on Sorption of Antimony (III and V) on Mangrove Sediment, Sundarban, India

Abstract: All chapters of the previous edition [see HbA 37, 2103] have been completely rewritten to cover the rapid increase in research in this area. The number of literature citations have been reduced by referring to recent review articles and the book aims at a comprehensive and critical rather than encyclopaedic summary of the data of environmental chemistry. The 1st 4 chapters deal with air, water, rocks and soils; the cycling of C, N, H, O2 and S in the biosphere are covered in 1 chapter and the elemental Other CABI sites 

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.

Abstract: Sampling and Sampling Techniques. Filtration and Storage. Determination of Salinity. Determination of Oxygen. Determination of Hydrogen Sulphide. Determination of Thiosulphate and Sulfur. Determination of pH. Determination of Alkalinity and Total Carbonate. Determination of pCO2. Determination of Nutrients. Determination of Major Constituents. Determination of Trace Elements. Determination of Natural Radioactive Tracers. In Situ Registration of pH and Oxygen. Determination of Dissolved Organic Carbon (DOC) by High Temperature Combustion. The Automatic Determination of Dissolved Organic Carbon (DOC) by Wet Chemical Oxidation. Determination of Particulate Organic Carbon and Nitrogen. Preparation of Lipophilic Organic Seawater Concentrates. Adsorption Chromatography of Organic Seawater Concentrates. Clean-up of Organic Seawater Concentrates by HPLC. Fluorimetric Determination of Dissolved Petroleum Residues. Determination of Selected Organochlorines in Seawater. Determination of Volatile Halocarbons in Seawater. Determination of Dimethlysulfide. Determination of Marine Humics. Determination of Amino Acids and Carbohydrates. HPLC Analysis of Photosynthetic Pigments.

Abstract: Note: Bibliogr. : p. 275-317. Index Reference Record created on 2004-09-07, modified on 2016-08-08

Abstract: Accurate and precise sampling and analytical procedures are essential in environmental geochemical studies. This report provides a detailed description of the techniques and analytical procedures for sampling, grain size determinations, and for precise and accurate AAS determination of the major and trace metals in marine sediments and suspended particulate matter. In addition, it describes the procedures for the chemical partition of the metals, determination of readily oxidizable organic matter, and calcium carbonate. A separate section discusses the normalization of trace metal data.