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Ultrasensitive determination of carbendazim in water and orange juice using a carbon paste electrode
Gilberto J. Arruda Fábio De Lima Claudia A. L. Cardoso 《Journal of environmental science and health. Part. B》2016,51(8):534-539
A carbon paste electrode was used for the electrochemical quantification of carbendazim in water and orange juice samples. Carbendazim oxidation on the electrode surface was found to be controlled by adsorption. The novel electrochemical procedure for carbendazim quantification employed differential pulse voltammetry using a carbon paste electrode under optimal conditions. Carbendazim oxidation currents were linear at concentrations of 2.84 to 45.44 µg L?1, with a limit of detection of 0.96 µg L?1. The proposed method was applied to carbendazim quantification in ultrapurified water, river water, and orange juice. Recovery rates in water and orange juice samples were in the 97%–101% range, indicating that the method can be employed to determine carbendazim in these matrices, with advantages including shorter analysis time and lower cost than routine methods such as chromatography or spectroscopy. The electrode showed good reproducibility, remarkable stability, and especially good surface renewability by simple mechanical polishing. The recovery rates observed were highly concordant with those obtained for high-performance liquid chromatography, having a relative standard deviation of less than 1.3%. 相似文献
164.
In human-dominated landscapes, interactions and perceptions towards wildlife are influenced by multidimensional drivers. Understanding these drivers could prove useful for wildlife conservation. We surveyed the attitudes and perceptions of fishers towards threatened Irrawaddy dolphins (Orcaella brevirostris) at Chilika Lagoon India. To validate the drivers of fisher perceptions, we : (1) observed dolphin foraging behavior at stake nets, and (2) compared catch per unit effort (CPUE) and catch income of fishers from stake nets in the presence and absence of foraging dolphins. We found that fishers were mostly positive towards dolphins, believing that dolphins augmented their fish catch and using culture to express their perceptions. Foraging dolphins were observed spending half their time at stake nets and were associated with significantly higher catch income and CPUE of mullet (Liza sp.), a locally preferred food fish species. Wildlife conservation efforts should use the multidimensional drivers of human–wildlife interactions to involve local stakeholders in management. 相似文献
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166.
Groundwater Vulnerability Assessment Combining the Drastic and Dyna-Clue Model in the Argentine Pampas 总被引:3,自引:0,他引:3
Vulnerability assessment is considered an effective tool in establishing monitoring networks required for controlling potential
pollution. The aim of this work is to propose a new integrated methodology to assess actual and forecasted groundwater vulnerability
by including land-use change impact on groundwater quality. Land-use changes were simulated by applying a spatial dynamics
model in a scenario of agricultural expansion. Groundwater vulnerability methodology DRASTIC-P, was modifyed by adding a land-use
parameter in order to assess groundwater vulnerability within a future scenario. This new groundwater vulnerability methodology
shows the areas where agricultural activities increase the potential level of groundwater vulnerability to pollution. The
Dulce Creek Basin was the study case proposed for the application of this methodology. The study revealed that the area with
Very High vulnerability would increase 20% by the year 2020 in the Dulce Creek Basin. This result can be explained by analyzing
the land-use map simulated by the Dyna-CLUE model for the year 2020, which shows that the areas with increments in crop and
pasture coincide with the area defined by the Very High aquifer vulnerability category in the year 2020. Through scenario
analysis, land-use change models can help to identify medium or long term critical locations in the face of environmental
change. 相似文献
167.
Cardoso NF Lima EC Pinto IS Amavisca CV Royer B Pinto RB Alencar WS Pereira SF 《Journal of environmental management》2011,92(4):1237-1247
The cupuassu shell (Theobroma grandiflorum) which is a food residue was used in its natural form as biosorbent for the removal of C.I. Reactive Red 194 and C.I. Direct Blue 53 dyes from aqueous solutions. This biosorbent was characterized by infrared spectroscopy, scanning electron microscopy, and nitrogen adsorption/desorption curves. The effects of pH, biosorbent dosage and shaking time on biosorption capacities were studied. In acidic pH region (pH 2.0) the biosorption of the dyes were favorable. The contact time required to obtain the equilibrium was 8 and 18 h at 298 K, for Reactive Red 194 and Direct Blue 53, respectively. The Avrami fractionary-order kinetic model provided the best fit to experimental data compared with pseudo-first-order, pseudo-second-order and chemisorption kinetic adsorption models. The equilibrium data were fitted to Langmuir, Freundlich, Sips and Radke-Prausnitz isotherm models. For both dyes the equilibrium data were best fitted to the Sips isotherm model. 相似文献
168.
Fátima Lima Joana Portugal‐Pereira André F.P. Lucena Pedro Rochedo Jorge Cunha Manuel Lopes Nunes Alexandre Salem Szklo 《Natural resources forum》2015,39(3-4):175-190
This study estimated a series of indicators to assess the energy security of supply and global and local environmental impacts under different mitigation scenarios through 2050 in Brazil, designed with the integrated optimization energy system model MESSAGE‐BRAZIL. The assessment of interactions between environmental impacts and energy security dimensions was complemented through the application of life cycle assessment (LCA) methodology. Overall results imply energy security establishes more synergies than trade‐offs in increasingly stringent mitigation scenarios, especially patent within the sustainability dimension, which increases energy security and provides additional benefits regarding climate change mitigation and air pollution emissions. It is still necessary to extend analysis to other energy sectors in addition to the power supply sector and to promote a better understanding of repercussions of energy scenario expansion in energy security. 相似文献
169.
Venancio Wilson Augusto Lima Rodrigues-Silva Caio Spina Mylena Diniz Vinicius Guimarães José Roberto 《Environmental science and pollution research international》2021,28(19):23742-23752
Environmental Science and Pollution Research - Benzimidazoles (BZ) are among the most used drugs to treat parasitic diseases in both human and veterinary medicine. In this study, solutions... 相似文献
170.
Eiró Luciana Guimarães Ferreira Maria Karolina Martins Frazão Déborah Ribeiro Aragão Walessa Alana Bragança Souza-Rodrigues Renata Duarte Fagundes Nathalia Carolina Fernandes Maia Lucianne Cople Lima Rafael Rodrigues 《Environmental science and pollution research international》2021,28(28):37001-37015
Environmental Science and Pollution Research - Lead (Pb) is one of the most toxic and abundant elements in the earth’s crust, which is pointed out that the intoxication caused by it... 相似文献