42 research outputs found
TolerĂąncia e potencial fitorremediador de Stizolobium aterrimum associada ao fungo micorrĂzico arbuscular Glomus etunicatum em solo contaminado por chumbo
The mechanical properties, water resistance and degradation behaviour of silica-filled sago starch/PVA plastic films
Anthropogenic and geogenic radionuclides content in an undisturbed Slovenian forest soil
Development in Air Permeability of Natural Rubber Tire Tube Compound by Adding Variable Dosage of Nanoclay
Establishment of control site baseline data for erosion studies using radionuclides: a case study in East Slovenia
Effect of ball milling on the mechanical properties and crystallization of graphene nanoplatelets reinforced short chain branchedâpolyethylene
DNA Adsorption Studies of Poly(4,4âČ-Cychlohexylidene Bisphenol Oxalate)/Silica Nanocomposites
Effect of unmodified and modified sago starch on properties of (sago starch)/silica/PVA plastic films
Arsenic speciation in polychaetes (Annelida) and sediments from the intertidal mudflat of Sundarban mangrove wetland, India
This paper documents the concentration of total arsenic and individual arsenic species in four soft-bottom benthic polychaetes (Perenereis cultifera, Ganganereis sootai, Lumbrinereis notocirrata and Dendronereis arborifera) along with host sediments from Sundarban mangrove wetland, India. An additional six sites were considered exclusively for surface sediments for this purpose. Polychaetes were collected along with the host sediments and measured for their total arsenic content using inductively coupled plasma mass spectrometry. Arsenic concentrations in polychaete body tissues varied greatly, suggesting species-specific characteristics and inherent peculiarities in arsenic metabolism. Arsenic was generally present in polychaetes as arsenate (AsV ranges from 0.16 to 0.50 mg kgâ1) or arsenite (AsIII ranges from 0.10 to 0.41 mg kgâ1) (30â53 % as inorganic As) and dimethylarsinic acid (DMAV <1â25 %). Arsenobetaine (AB < 16 %), and PO4-arsenoriboside (8â48 %) were also detected as minor constituents, whilst monomethylarsonic acid (MAV) was not detected in any of the polychaetes. The highest total As (14.7 mg kgâ1 dry wt) was observed in the polychaete D. arborifera collected from the vicinity of a sewage outfall in which the majority of As was present as an uncharacterised compound (10.3 mg kgâ1 dry wt) eluted prior to AB. Host sediments ranged from 2.5 to 10.4 mg kgâ1 of total As. This work supports the importance of speciation analysis of As, because of the ubiquitous occurrence of this metalloid in the environment, and its variable toxicity depending on chemical form. It is also the first work to report the composition of As species in polychaetes from the Indian Sundarban wetlands