Factors affecting the determination of iron species in the presence of ferric iron

Jian, Zhu; Yang, Xi; Fan, Fenliang; Li, Yitong

doi:10.1007/s13201-018-0876-6

Cited by 22 publications

(7 citation statements)

References 20 publications

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“…Given the size range of the added ferrihydrite and organic-iron complexes formed in the rhizosphere, the chance of introducing colloidal iron in the collected pore water sample at 0.45 μm is high but is considered to be a dissolved iron phase . Collected pore water samples were analyzed in situ for reduced iron (Fe(II)) by the 1,10-phenanthroline method spectrophotometrically (Vernier Spectrophotometer, USA) at 510 nm. − A part of the sample was acidified with trace-certified hydrochloric acid for arsenic, uranium and total iron quantification in ICP-MS and major cations analysis in atomic absorption spectroscopy (PerkinElmer AAnalyst 400 Spectrophotometer). A part of the sample was acidified with sulfuric acid for colorimetric (Seal AQ2 Autoanalyzer) analyses of nitrate and ammonia.…”

Section: Materials and Methodsmentioning

confidence: 99%

Ferrihydrite Reduction Increases Arsenic and Uranium Bioavailability in Unsaturated Soil

Malakar

Kaiser

Snow

et al. 2020

Environ. Sci. Technol.

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Redox driven mobilization and plant uptake of contaminants under transiently saturated soil conditions need to be clarified to ensure food and water quality across different irrigation systems. We postulate that solid-phase iron reduction in anoxic microsites present in the rhizosphere of unsaturated soil is a key driver for mobilization and bioavailability of contaminants under nonflooded irrigation. To clarify this, two major crops, corn and soybean differing in iron uptake strategies, were grown in irrigated synthetic soil under semiarid conditions with gravimetric moisture content ∼12.5 ± 2.4%. 2-line ferrihydrite, which was coprecipitated with uranium and arsenic, served as the only iron source in soil. Irrespective of crop type, reduced iron was detected in pore water and postexperiment rhizosphere soil confirming ferrihydrite reduction. These results support the presence of localized anoxic microsites in the otherwise aerobic porous bulk soil causing reduction of ferrihydrite and concomitant increase in plant uptake of comobilized contaminants. Our findings indicate that reactive iron minerals undergo reductive dissolution inside anoxic microsites of primarily unsaturated soil, which may have implications on the mobility of trace element contaminants such as arsenic and uranium in irrigated unsaturated soils, accounting for 55% of the irrigated area in the US.

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Section: Materials and Methodsmentioning

confidence: 99%

Ferrihydrite Reduction Increases Arsenic and Uranium Bioavailability in Unsaturated Soil

Malakar

Kaiser

Snow

et al. 2020

Environ. Sci. Technol.

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“…This interference could be eliminated by incorporating a masking agent, sodium fluoride (Zhu et al, 2018). The quenching of fluorescence due to addition of high concentration of other heavy metal ions could be due to the adsorption of the heavy metal ions on the surface of thiol‐coated QD (Ke et al, 2014).…”

Section: Resultsmentioning

confidence: 99%

Optimized one‐pot synthesis of CdSe quantum dot capped with 3‐mercaptopropionic acid as an efficient fluorescent probe for selective detection of Hg (II)

Das

Paul

2022

Water & Environment J

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Here, we demonstrated the use of 3‐mercaptopropionic acid‐capped CdSe quantum dots (CdSe QDs) for the sensing of mercury ions (Hg2+) in solution. The size and the shape of the synthesized QD were observed through transmission electron microscopy (TEM), and crystallinity was confirmed through X‐ray diffraction (XRD) analysis. The synthesized QD showed to have mean size 4 nm. Our QD was found to sense Hg2+ ions with a detection limit of 5 ppm at pH 7.0 and a linearity range of 5–50 ppm. The effect of pH on the optical property of QD was also investigated and found that the sensor worked best at pH 7.0 with high linearity and sensitivity, thus reducing the cost of the process. The sensing mechanism of CdSe QD was further analysed through Fourier transform infrared (FTIR) spectroscopy. Therefore, our synthesized CdSe QD capped with 3‐mercaptopropionic acid demonstrated to act as an efficient nanomaterial for rapid and easy to perform sensing of mercury ion in aquatic environment.

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“…1. Based on literature; the reaction between ferrous ion and phen is highly selective and sensitive to ferrous to form a reddish/orange complex 33 . The mechanism is based on the reduction of ferric to ferrous carried out by a reducing agent such as hydroxylamine, followed by metal complexion with phen which is considered as a selective ligand to iron metal through the implication of three nitrogen groups with iron (II) 34 .…”

Section: Results and Discussion: Methods A (Determination Of Iron Via Conventional Spectrophotometer Technique)mentioning

confidence: 99%

Iron (II) Determination in Lipstick Samples using Spectrophotometric and Microfluidic Paper-based Analytical Device (µPADs) Platform via Complexation Reaction with Iron Chelator 1, 10-phenanthroline: A Comparative Study

Abdulkareem

Abdulsattar

2022

Baghdad Sci.J

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This study was undertaken to introduce a fast, accurate, selective, simple and environment-friendly colorimetric method to determine iron (II) concentration in different lipstick brands imported or manufactured locally in Baghdad, Iraq. The samples were collected from 500-Iraqi dinars stores to establish routine tests using the spectrophotometric method and compared with a new microfluidic paper-based analytical device (µPAD) platform as an alternative to cost-effective conventional instrumentation such as Atomic Absorption Spectroscopy (AAS). This method depends on the reaction between iron (II) with iron(II) selective chelator 1, 10-phenanthroline(phen) in the presence of reducing agent hydroxylamine (HOA) and sodium acetate (NaOAc) buffer to yield a reddish/orange colour change proportional to the iron(II) concentration measured at λ max = 510 nm. Under optimum conditions, the calibration curve was linear in the range between (0.5-150) mg L -1 with a limit of detection of 0.09 mg L -1 . Compared to a spectrophotometric detection method, µPAD measured colour intensity using captured images using Samsung mobile phone and image J program to give proof of concept that µPAD platform fulfils the purpose of accuracy and at the same time remaining cost-effective and simplistic to be used in both developing and developed countries gave same linear calibration curve with a limit of detection 0.12 mg L -1 . ANOVA test was used to compare the proposed method results with conventional method results showing the method was accepted. The antimicrobial activity showed no significant effect from lipstick samples on tested microbes.

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Factors affecting the determination of iron species in the presence of ferric iron

Cited by 22 publications

References 20 publications

Ferrihydrite Reduction Increases Arsenic and Uranium Bioavailability in Unsaturated Soil

Ferrihydrite Reduction Increases Arsenic and Uranium Bioavailability in Unsaturated Soil

Optimized one‐pot synthesis of CdSe quantum dot capped with 3‐mercaptopropionic acid as an efficient fluorescent probe for selective detection of Hg (II)

Iron (II) Determination in Lipstick Samples using Spectrophotometric and Microfluidic Paper-based Analytical Device (µPADs) Platform via Complexation Reaction with Iron Chelator 1, 10-phenanthroline: A Comparative Study

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