Voltammetric Determination of Sulfide Ions

Ковалева, С. В.; Cheremukhina, N. M.; Gladyshev, V. P.

doi:10.1023/b:janc.0000037280.30012.26

Cited by 8 publications

(5 citation statements)

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“…Metal complexation measurements were performed via voltammetry (Rozan et al, 1999;Kovaleva, 2004;Andjelkovic, 2006). An AIS Model DLK-100A Electrochemical Analyzer Rev 3.3 was used to the determine complexation capacity of metals with DOM.…”

Section: Dom-metal Complexation Measurementsmentioning

confidence: 99%

Characterization of dissolved organic matter from a restored urban marsh and its role in the mobilization of trace metals

ElBishlawi

Jaffé

2015

Chemosphere

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Dissolved organic matter (DOM), although highly variable and not very well characterized, plays a role in many important environmental reaction and transport processes, including trace metal mobilization. This study characterizes heterogeneous DOM from the pore-water of a restored urban tidal marsh, using chemical, optical, and electrochemical methods for dissolved organic carbon/nitrogen ratios (C:N: 1.8-6.4), spectroscopic characteristics (decreased aromaticity in amended sediments), element ratios (maximum sediment-associated trace metal concentrations measured<30 cm), and metal complexation properties (logKc: Cd: 10.7±0.7>Pb: 9.5±0.1>Cr: 7.3±0.1>Cu: 5.07±0.53), all as a function of sediment depth. Specific DOM properties from the restored marsh were then compared to pore-water samples from a natural marsh and a simulated wetland microcosm which resulted in similar values, while the reference humic acid significantly differed in properties from field DOM. The results revealed that reference humic acids do not accurately represent the complexity of natural heterogeneous DOM, whereas a simulated wetland microcosm may provide a reasonable representation of natural DOM. Clear differences between amended and original soil (transition below 30 cm) were observed in DOM and trace metal properties including: lower DOM content, higher logKc values, less DOM complexity, development of a iron-sulfide redox buffering pool, and greater affinity for metals in the solid phase occurring in the amended sediments.

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Section: Dom-metal Complexation Measurementsmentioning

confidence: 99%

Characterization of dissolved organic matter from a restored urban marsh and its role in the mobilization of trace metals

ElBishlawi

Jaffé

2015

Chemosphere

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“…Furthermore, the obtained Pt-NCs showed a selective response to S 2− over other competitive anions in buffer solutions, and could be used as a specific sensor for S 2− detection. In comparison to other strategies developed for S 2− detection [38][39][40][41][42][43], the present study has its obvious advantages as it is highly sensitive, rapid, simple, cost-effective and non-polluting. Therefore, the present study reports a 'green-synthesis' method, which is performed in one step, and is cost-effective, non-cytotoxic and bioapplicable, and particularly requires a short reaction time for the synthesis of BSA-protected, highly fluorescent Pt-NCs, which could be extended to other kinds of protein-protected Pt-NCs.…”

Section: Discussionmentioning

confidence: 99%

“…Overinhalation of sulfide can irritate mucous membranes, and cause unconsciousness and respiratory paralysis. Thus, the detection of sulfide has become particularly important for industrial, environmental and biological research, and other related fields [38][39][40][41][42][43]. The prepared Pt-NCs@BSA are then applied to the detection of S 2− in HEPES buffer solutions (10 mM, pH=7.4).…”

Section: Detection Of Sulfide Ions (S 2−mentioning

confidence: 99%

Synthesis of bovine serum albumin-protected high fluorescence Pt₁₆-nanoclusters and their application to detect sulfide ions in solutions

Yue

et al. 2016

Nanotechnology

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Highly fluorescent (quantum yield, QY = 17%) Pt16-nanoclusters (Pt16-NCs@BSA) have been prepared via a one-step ultrasonic-assistance method by using cheap and easily available ascorbic acid as reductant and bovine serum albumin (BSA) as a stabilizing agent in aqueous solution. The fluorescence properties of the Pt-NCs@BSA can be easily controlled by optimizing conditions, and the products are extremely stable and could be used for the detection of sulfide ions (S(2-)) in solutions as a specific luminescence sensor. The present synthesis method is performed in one step, being cost-effective with a particularly short reaction time, which could be extended to the synthesis of other kinds of protein-protected Pt-NCs.

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“…Briefly, nitrogen gas was bubbled through a vessel containing a sediment sample in 1 N HCl for forty-five minutes and the off gases were captured in two traps containing NaOH. Sulfide was measured voltammetrically (AIS DLK 100A) using a thin film mercury electrode in conjunction with a silver/silver chloride reference electrode, and platinum counter electrode (Kovaleva, 2004). AVS Simultaneously Extractable Metals (AVS/SEM) were measured after filtering the acidified sample with a 0.45 um filter and measuring metals using AAS.…”

Section: Sediment Analysismentioning

confidence: 99%

Trace metal dynamics in the sediments of a constructed and natural urban tidal marsh: The role of iron, sulfide, and organic complexation

ElBishlawi

Shin²,

Jaffé

2013

Ecological Engineering

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a b s t r a c tTwo tidal marshes in the New Jersey Meadowlands, one constructed and one natural were characterized to compare their ability to immobilize trace metals (Cd, Cr, Cu, Mn, Pb, and Zn). Surface and pore waters were sampled four times a year between 2008 and 2010 and sediment cores were collected yearly in the constructed marsh and once in 2010 in the natural marsh. Interactions of trace metals with redox active species such as iron and sulfide as well as with organic matter were investigated. Precipitation with sulfides played a major role in immobilizing certain trace metals, including Cr, Mn, and Pb. At both sites, the presence of sulfide did not preclude the presence of dissolved trace metals in pore-water at concentrations exceeding their metal sulfide solubility product. Thermodynamic equilibrium modeling indicated these dissolved metals remained in solution due to an association with heterogeneous dissolved organic carbon. No net trace metal accumulation in the surficial sediments of the constructed marsh was noted between 2007 and 2010. This implied that a dynamic equilibrium of trace metal flux into and out of the sediments was established, rather than a long-term net accumulation of trace metals. In the constructed marsh, little difference was found between the immobilization potential in the area of intermittent flooding (high marsh) and the area of sustained flooding (low marsh). The newly constructed wetland immobilized significantly more Cr, Mn, and Zn than the natural marsh and similar concentrations of Cd, Cu, and Pb. This may be due to increased redox buffering through a larger FeS buffering pool against tidally induced oxygen delivery.

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Voltammetric Determination of Sulfide Ions

Cited by 8 publications

References 1 publication

Characterization of dissolved organic matter from a restored urban marsh and its role in the mobilization of trace metals

Characterization of dissolved organic matter from a restored urban marsh and its role in the mobilization of trace metals

Synthesis of bovine serum albumin-protected high fluorescence Pt₁₆-nanoclusters and their application to detect sulfide ions in solutions

Trace metal dynamics in the sediments of a constructed and natural urban tidal marsh: The role of iron, sulfide, and organic complexation

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Voltammetric Determination of Sulfide Ions

Cited by 8 publications

References 1 publication

Characterization of dissolved organic matter from a restored urban marsh and its role in the mobilization of trace metals

Characterization of dissolved organic matter from a restored urban marsh and its role in the mobilization of trace metals

Synthesis of bovine serum albumin-protected high fluorescence Pt16-nanoclusters and their application to detect sulfide ions in solutions

Trace metal dynamics in the sediments of a constructed and natural urban tidal marsh: The role of iron, sulfide, and organic complexation

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Synthesis of bovine serum albumin-protected high fluorescence Pt₁₆-nanoclusters and their application to detect sulfide ions in solutions