Carbon paste electrodes modified with biosolids, soils and biocomposites utilized to study the interaction between organic matter and copper

Flores-Álvarez, José Manuel; González, Ignacio; Rosa, L.A. García-de la; Mancilla-Peña, F.; Reyes-Gómez, Juan

doi:10.1016/j.jenvman.2010.08.033

Cited by 14 publications

(5 citation statements)

References 63 publications

(66 reference statements)

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“…Carbon paste electrode (CPE) has gained recognition as an easy to fabricate and a cost effective potent sensor for the detection of heavy metals. Moreover, CPE is also found to possess high conductivity or low Ohmic resistance (≤ 10 Ω), offers a wide potential window with low background current and it is easily modifiable with different organic, inorganic and biological materials . Sensors that contain a biological component in the analyte detection layer of the sensing device are called as biosensors.…”

Section: Introductionmentioning

confidence: 99%

Electroanalytical Detection of Cr(VI) and Cr(III) Ions Using a Novel Microbial Sensor

et al. 2017

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A microbial sensor, namely carbon paste electrode (CPE) modified with Citrobacter freundii (Cf–CPE) has been developed for the detection of hexavalent (Cr(VI)) and trivalent (Cr(III)) chromium present in aqueous samples using voltammetry, an electroanalytical technique. The biosensor developed, demonstrated about a twofold higher performance as compared to the bare CPE for the chosen ions. Using cyclic voltammetry and by employing the fabricated Cf–CPE, the lowest limit of detection (LLOD) of 1x10−4 M and 5x10−4 M for Cr(VI) and Cr(III) ions respectively could be achieved. By adopting the Differential Pulse Cathodic Stripping Voltammetric technique, the LLOD could be further improved to 1x10−9 M and 1x10−7 M for Cr(VI) and Cr(III) ions respectively using the biomodified electrodes. The reactions occurring at the electrode surface‐chromium solution interface and the mechanisms of biosorption of chromium species onto the biosensor are discussed. The stability and utility of the developed biosensor for the analysis of Cr(VI) and Cr(III) ions in chromite mine water samples has been evaluated.

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Section: Introductionmentioning

confidence: 99%

Electroanalytical Detection of Cr(VI) and Cr(III) Ions Using a Novel Microbial Sensor

et al. 2017

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“…In vineyards soils, this value reaches 49 and 91 mg kg -1 in Europe and France, respectively (Ballabio et al 2018). In old vineyards, Cu concentrations in the topsoil can reach several hundred mg Cu kg -1 , as widely reported in several European countries including France, Italy, Spain, Greece, Portugal, Czech Republic (Fernández-Calviño et al 2009;Komárek et al 2010;Fernández-Calviño et al 2010;Flores-Álvarez et al 2011;Kelepertzis et al 2017). Despite the reduction of the authorized application rate to 4 kg Cu ha -1 year -1 (EFSA et al 2018), Cu-based fungicides continue to be used, particularly in organic viticulture for which there is currently no alternative that offers equally effective protection (Andrivon et al 2018).…”

Section: Introductionmentioning

confidence: 77%

Do DOM optical parameters improve the prediction of copper availability in vineyard soils?

Ouédraogo

Cornu

Janot

et al. 2021

Environ Sci Pollut Res

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Accumulation of copper (Cu) in soils due to the application of fungicides may be toxic for organisms and hence affect winegrowing sustainability. Soil parameters such as pH and dissolved organic matter (DOM) are known to affect the availability of Cu. In this study, we investigated the contribution of chromophoric and fluorescent DOM properties to the prediction of Cu availability in 18 organic vineyard soils in the Bordeaux winegrowing area (France). The DOM parameters, assessed through absorbance and fluorescence analyses, and proxies for Cu availability (total soluble Cu and free ionic Cu 2+ ) were measured in 0.01 M KCl extracts. Total soluble Cu (CuKCl) varied 23-fold while free ionic Cu 2+ varied by a factor of 4,600 among the soils. DOC concentrations were similar among the soils, but the samples differed in the quality of DOM as assessed by optical spectroscopy. Multilinear regression models with and without DOM quality parameters were investigated to predict Cu availability. The best model for CuKCl successfully explained 83 % of variance and included pH, CuT and two DOM fluorescence quality indices, the FI fluorescence index, which distinguishes between microbial and higher plant origins, and the HIX humification index. For the prediction of Cu 2+ , pH alone explained 88 % of variance and adding DOM parameters did not improve modelling. The two Cu availability proxies were related to pH. This study confirms the prominent role of pH in Cu availability and underlines the importance of DOM quality to better predict Cu solubility.

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“…This may be because Cu can form poorly soluble complexes with inorganic ions, such as CuCl ( k sp = 1.72 × 10 −7 25 ) during its reduction. 26 This complex formation is likely to have inhibited the reduction of Cu, reducing its current; for this reason, the influence of the electrolyte used was studied.…”

Section: Resultsmentioning

confidence: 99%

Selective detection of Cu²⁺ ions using a mercaptobenzothiazole disulphide modified carbon paste electrode and bismuth as adjuvant: a theoretical and electrochemical study

et al. 2022

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Carbon paste electrodes modified with biosolids, soils and biocomposites utilized to study the interaction between organic matter and copper

Cited by 14 publications

References 63 publications

Electroanalytical Detection of Cr(VI) and Cr(III) Ions Using a Novel Microbial Sensor

Electroanalytical Detection of Cr(VI) and Cr(III) Ions Using a Novel Microbial Sensor

Do DOM optical parameters improve the prediction of copper availability in vineyard soils?

Selective detection of Cu²⁺ ions using a mercaptobenzothiazole disulphide modified carbon paste electrode and bismuth as adjuvant: a theoretical and electrochemical study

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Carbon paste electrodes modified with biosolids, soils and biocomposites utilized to study the interaction between organic matter and copper

Cited by 14 publications

References 63 publications

Electroanalytical Detection of Cr(VI) and Cr(III) Ions Using a Novel Microbial Sensor

Electroanalytical Detection of Cr(VI) and Cr(III) Ions Using a Novel Microbial Sensor

Do DOM optical parameters improve the prediction of copper availability in vineyard soils?

Selective detection of Cu2+ ions using a mercaptobenzothiazole disulphide modified carbon paste electrode and bismuth as adjuvant: a theoretical and electrochemical study

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Selective detection of Cu²⁺ ions using a mercaptobenzothiazole disulphide modified carbon paste electrode and bismuth as adjuvant: a theoretical and electrochemical study