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In situ speciation of uranium in treated acid mine drainage using the diffusion gradients in thin films technique (DGT)
(2017-02-01)
The exchange membranes P81 and DE81 and Chelex-100 resin were used to perform in situ speciation of uranium in treated acid mine drainage at the Osamu Utsumi mining site, Poços de Caldas city, Southeast Brazil. To investigate ...
Application of multi-factorial experimental design to successfully model and optimize inorganic chromium speciation by square wave voltammetry
(Elsevier Science Sa, 2016-03-08)
Response surface methodology (RSM) was used to optimize voltammetric signal of hanging mercury drop electrode (HMDE) for inorganic chromium determination and speciation. Initial solution pH, DTPA (Diethylenetriaminepentaacetic ...
Ionic speciation and risks associated with agricultural use of industrial biosolid applied in Inceptisol
(Springer, 2019-07-01)
The evaluation of the chemical leaching potential from soils amended with biosolid is of extreme importance for environmental safety of agricultural use of these residues. The objective of this study was to evaluate the ...
Preliminary physical chemical characterization of river waters and sediments affected by copper mining activity in central chile. Application of multivariate analysis
(SOC CHILENA QUIMICA, 2007-09)
The concentration of trace elements and other analytes of environmental interest was determined in waters and sediments of the Coya and Cachapoal rivers (VI Region, Central Chile), which corresponds to a location highly ...
Tilapia (Oreochromis niloticus) as a biondicator of copper and cadmium toxicity. A bioavailability approach
(2017-01-01)
The acute toxicity of copper and cadmium in Oreochromis niloticus was evaluated through a 96 h static assay. Precipitation of Cu and co-precipitation of Cd in the presence of Cu were noted, being indicative of differences ...
Total determination and direct chemical speciation of Hg in fish by solid sampling GF AAS
(Royal Soc Chemistry, 2011-01-01)
Simple and rapid analytical procedures for the direct determination of total Hg and for direct chemical speciation of Hg(2+) and methylmercury (MHg) in fish were proposed after careful optimization of the heating program ...
Concentration of essential and toxic elements as a function of the depth of the soil and the presence of fulvic acids in a wetland in Cerrado, Brazil
(2021-04-01)
The protection of wetlands is essential for sustainable development. The particular hydrology of wetlands creates conditions for the formation of hydric soils. Hydric soils are formed in oxide-reducing environments and ...
Use of speciation modelling of heavy metals in Los Patos lagoon, Argentina, to improve waterbody management
(Inderscience Enterprises, 2016-12)
Levels established in water quality guidelines for the protection of aquatic life are based on the total concentrations of heavy metals regardless of speciation. However, there are numerous studies that show the importance ...
Metal and Metalloid Speciation in Aquatic Environments: Concepts, Techniques and Applications
(Brazilian Chemical Soc, 2017-01-01)
Aquatic environments are dynamic systems, where metals and metalloids are continuously transformed and mobilised through different chemical forms among organic and inorganic substances and particulate material. These ...
Direct determination of arsenobetaine and total As in robalo fish liver and tuna fish candidate reference material by slurry sampling graphite furnace atomic absorption spectrometry (SLS-GF AAS)
(2019-01-01)
This work describes a simple and rapid screening method for direct speciation of arsenobetaine (AsB) in tuna fish tissue and total As in tuna fish tissue and robalo liver using SLS-GF AAS. All procedures were proposed after ...