Sequential determination of five heavy metal ions in Brazilian phosphate fertilizers and surface waters by stripping voltammetry

Martos, L. M. di; Jost, Cristiane Luisa

doi:10.1007/s13762-018-02181-7

Cited by 7 publications

(4 citation statements)

References 34 publications

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“…Large quantities of pesticides, heavy metals from fertilizers, and particulate material from crop burn-off are carried from areas of intensive agriculture by winds [22] in a process known as pesticide drift, which is facilitated further by the application of fertilizers and pesticides by aircraft. This pesticide drift reaches adjacent Cerrado fragments, where it can affect all the resident organisms [23][24][25][26][27]. As the lichen community is known to be the most sensitive component of this biota, our hypothesis is that the diversity of lichen morphotypes and their coverage of tree trunks in Cerrado fragments inserted in a farmland matrix will be affected significantly by pesticide drift, in particular at the edges of these fragments.…”

Section: Introductionmentioning

confidence: 99%

Edge Effects Reflect the Impact of the Agricultural Matrix on the Corticolous Lichens Found in Fragments of Cerrado Savanna in Central Brazil

et al. 2020

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Habitat fragmentation affects lichen communities by inducing edge effects, although the dispersal of pollutants by pesticide drift from commercial crops may also provoke alterations in community structure, due to the varying sensitivity of lichen morphotypes to pollutants. In this context, we tested the hypothesis that lichen morphotype richness and diversity, and the percentage area of the trunks covered by different lichen morphotypes are modified significantly at the edges of fragments of Cerrado vegetation inserted within the agricultural matrix. We evaluated habitat fragments representing different Cerrado formations (Cerradão, Cerrado sensu stricto, and seasonal semi-deciduous forest) as well as the Emas National Park, a prominent Cerrado conservation unit. We used Generalized Linear Mixed Models (GLMMs) to test the potential of the models compiled using a mixture of phytosociological and environmental parameters, including the species, the height of the host plant (H), the circumference of its stem at breast height (CBH), total chlorophyll (TC), bark fissuring (BF) and pH, and illuminance (Lum), to explain the observed variation in the lichen morphotype richness and the percentage cover of the trunks by corticolous lichen morphotypes at the center and edge of the fragments. The central areas invariably had a greater diversity of morphotypes in all the fragments. The morphotypes considered highly sensitive to disturbance were not observed in edge areas, confirming a clear edge effect, as well as the influence of pesticide drift from the adjacent farmland matrix, on the structure of the lichen community. At both the edge and center sites, the larger trees (higher CBH) with less fissured bark tended to have the greatest diversity of lichen morphotypes, and more acidic barks had the greatest lichen cover. The models tested indicated that the variable tree species is an important determinant of the observed patterns of lichen morphotype richness and cover, either on its own or in association with pH or CBH + pH. The analyses also indicated that all the variables tested are important in some way for the definition of the percentage cover of the host trunks. The present study contributes to the understanding of the diversity of the corticolous lichen communities in the remaining fragments of Cerrado vegetation and the effects of the agricultural matrix on this community. The lichen may thus play a role as indicators of impact on other species, these organisms may provide important insights for the further investigation of the disturbance caused by the agricultural matrix on the communities of other groups of organisms.

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Section: Introductionmentioning

confidence: 99%

Edge Effects Reflect the Impact of the Agricultural Matrix on the Corticolous Lichens Found in Fragments of Cerrado Savanna in Central Brazil

et al. 2020

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“…From this perspective, various efforts have been dedicated to developing electrode architectures for ecofriendly electroanalytical determination of heavy metals. For instance, bismuth film combined with nanomaterials, such as carbon nanotubes, reduced graphene oxide, and clay materials, has been reported as sensitive modified electrodes for uranium, cadmium, and lead . In general, the numerous available redox sites, coupled with the electrocatalytic effect of nanomaterials, have been explored as a powerful tool for determining organic pollutants. − The high surface-to-volume ratio of nanoparticles can be harnessed in stripping voltammetric analysis, enhancing analyte preconcentration onto the electrode surface .…”

Section: Introductionmentioning

confidence: 99%

Core–Shell Chitosan Cobalt Ferrite Nanoparticles for Ultrasensitive Simultaneous Voltammetric Determination of Pb(II) and Cd(II)

Neto,

Costa,

Morawski

et al. 2024

ACS Appl. Nano Mater.

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In water samples from industrial regions, the presence of highly toxic and nonbiodegradable heavy metal ions (HMI) poses a significant threat to environmental quality. While analytical methods based on mercury electrodes are widely recognized for their high performance in the sensitive and selective quantification of various metal contaminants, the development of environmentally friendly strategies for the voltammetric determination of HMI remains a formidable challenge. In this study, we propose a material utilizing small-size chitosan (CTS) cobalt ferrite core–shell nanoparticles (CoFe2O4@CTS) as an electrode modifier for the simultaneous voltammetric determination of Pb(II) and Cd(II). The magnetic nanoparticles were synthesized using the solvothermal method and characterized using various techniques to explore their crystalline structure, magnetic properties, and chemical composition. The resulting electrochemical sensor, CoFe2O4@CTS/GCE, was generated through a one-step modification of a glassy carbon electrode (GCE). Utilizing differential pulse adsorptive stripping voltammetry (DPAdSV), our proposed sensor exhibited high sensitivity, with low limits of detection (LOD) values of 0.04 and 0.31 μg L–1 (E d = −1.0 V; t d = 90 s) for lead and cadmium, respectively. The exceptional sensitivity observed is indicative of interactions between HMI and CTS amine groups, leading to the effective preconcentration of the analytes. Furthermore, our sensor demonstrated excellent selectivity with an interference response below 8.93% for Pb(II) and 20% for Cd(II). Accuracy was evaluated using SRM 1643e (NIST). The application of green analytical chemistry (GAC) metrics resulted in a score of 0.91, highlighting the environmentally conscious aspects of our methodology.

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“…However, mercury and its vapours are toxic and, over recent years, "green" metals (i.e., bismuth, antimony and tin) have been increasingly used as electrode 2 of 9 materials in stripping analysis [15]. Following this trend, different methods have been developed for the determination of In(III) and Tl(I) on tin [16], bismuth [17,18] and antimony electrodes [19][20][21].…”

Section: Introductionmentioning

confidence: 99%

“Green” Three-Electrode Sensors Fabricated by Injection-Moulding for On-Site Stripping Voltammetric Determination of Trace In(III) and Tl(I)

et al. 2021

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This work reports the fabrication of a new environmentally friendly three-electrode electrochemical sensor suitable for on-site voltammetric determination of two toxic emerging ‘technology-critical elements’ (TCEs), namely indium and thallium. The sensor is fully fabricated by injection-moulding and features three conductive polymer electrodes encased in a plastic holder; the reference electrode is further coated with AgCl or AgBr. The sensor is applied to the determination of trace In(III) and Tl(I) by anodic stripping voltammetry using a portable electrochemical set-up featuring a miniature smartphone-based potentiostat and a vibrating device for agitation. For the analysis, the sample containing the target metal ions is spiked with Bi(III) and a bismuth film is electroplated in situ forming an alloy with the accumulated target metals on the working electrode of the sensor; the metals are stripped off by applying a square-wave anodic voltametric scan. Potential interferences in the determination of In(III) and Tl(I) were alleviated by judicious selection of the solution chemistry. Limits of quantification for the target ions were in the low μg L−1 range and the sensors were applied to the analysis of lake water samples spiked with In(III) and Tl(I) with recoveries in the range of 95–103%.

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Sequential determination of five heavy metal ions in Brazilian phosphate fertilizers and surface waters by stripping voltammetry

Cited by 7 publications

References 34 publications

Edge Effects Reflect the Impact of the Agricultural Matrix on the Corticolous Lichens Found in Fragments of Cerrado Savanna in Central Brazil

Edge Effects Reflect the Impact of the Agricultural Matrix on the Corticolous Lichens Found in Fragments of Cerrado Savanna in Central Brazil

Core–Shell Chitosan Cobalt Ferrite Nanoparticles for Ultrasensitive Simultaneous Voltammetric Determination of Pb(II) and Cd(II)

“Green” Three-Electrode Sensors Fabricated by Injection-Moulding for On-Site Stripping Voltammetric Determination of Trace In(III) and Tl(I)

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