Precise determination of dissolved platinum in seawater of the Japan Sea, Sea of Okhotsk and western North Pacific Ocean

Suzuki, Akihiro; Obata, Hajime; Okubo, Ayako; Gamo, Toshitaka

doi:10.1016/j.marchem.2014.10.003

Cited by 38 publications

(27 citation statements)

References 43 publications

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“…Open Mediterranean surface water Pt D concentrations appeared slightly higher than average Pt D in the North Atlantic seawater reported in the early nineties (,0.05 ng L À1 ; Colodner 1991) and recently confirmed by López-Sánchez et al (2019) for north, central and south-west Atlantic Ocean. Values were also higher than those reported in the north-west Pacific Ocean (,0.04 ng L À1 ; Suzuki et al 2014). However, the supposed Mediterranean surface water Pt D was similar to values in the coastal north Atlantic Ocean off the slightly Pt-contaminated Gironde Estuary (0.08 ng L À1 ; Cobelo-García et al 2014a) and lay within the range of values reported for the L erez Estuary seawater end-member (from 0.08 to 0.10 g L À1 ; Cobelo-García et al 2013).…”

Section: Discussioncontrasting

confidence: 64%

Spatial variability and sources of platinum in a contaminated harbor – tracing coastal urban inputs

Abdou¹,

Schäfer²,

Gil-Díaz³

et al. 2020

Environ. Chem.

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Environmental context. Emerging contaminants such as platinum are continuously released into aquatic environments. Analytical challenges, however, have restricted information on their geochemical cycles. We examine the potential use of platinum as a tracer of anthropogenic inputs in a model industrial/urban site (Genoa Harbor, Italy), and provide a first estimate of dissolved platinum baseline concentrations in the northern Mediterranean coast.Abstract. Biogeochemical cycles that include processes to control platinum (Pt) distribution remain widely unknown in aquatic environments, especially in coastal systems. Dissolved Pt concentrations in coastal seawater (Pt D ) and in suspended particulate matter (SPM, Pt P ) were measured, together with master variables comprising dissolved oxygen, dissolved and particulate organic carbon, chlorophyll-a, turbidity, and ammonium levels, along two longitudinal profiles in the industrial Genoa Harbor (north-west Italy). Concentrations and spatial distribution of Pt D and Pt P levels reflect distinct concentration gradients that were attributed to different Pt sources such as hospital, domestic and industrial wastewater, atmospheric deposition, and/or road runoff. Concentrations reaching up to 0.18 ng L À1 Pt D and 14 ng g À1 Pt P reflect the impact of Pt urban inputs to coastal sites. These first data highlight considerable anthropogenic contamination in a confined harbor compared with the proposed reference value for the western Mediterranean surface seawater measured at external sites. Identified correlations between Pt levels and human pollution signals suggest the potential use of Pt as a new tracer of anthropogenic inputs that can be applied to other urbanised coastal systems. Biogeochemical processes that induce changes in the partitioning and fate of Pt in coastal seawater reflect a spatial variability and highlight the need for comprehensive environmental monitoring at an appropriate spatial scale.

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Section: Discussioncontrasting

confidence: 64%

Spatial variability and sources of platinum in a contaminated harbor – tracing coastal urban inputs

Abdou¹,

Schäfer²,

Gil-Díaz³

et al. 2020

Environ. Chem.

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“…39,40 Therefore, the detection limit of the proposed AgNP method could be improved by applying a preconcentration step as an initial procedure. [41][42][43] In addition to enriching the concentration of an analyte in final solution, initial preconcentration steps are also useful to remove the high matrix content in samples (e.g. seawater) that interfere with analysis.…”

Section: Colorimetric Detection Of Mercury and Analytical Performancementioning

confidence: 99%

Colorimetric Detection of Mercury(II) Ion in Aqueous Solution Using Silver Nanoparticles

et al. 2017

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Novel green-chemistry synthesis of silver nanoparticles (AgNPs) is introduced as a low-cost, rapid and easy-to-use analytical method for mercury ion detection. Aqueous fruit extract of water apple (Syzygium aqueum) was used for the first time as bioreductant to synthesize stable AgNPs. The prepared AgNPs have a yellowish-brown color with a surface plasmon resonance peak at 420 nm. The addition of Hg(II) ions then changes the AgNPs color to colorless. The color change was in proportion to the concentration of Hg(II) ions. The presence of other metal ions in the system was also evaluated. The proposed method shows good selectivity and sensitivity towards Hg(II) ions. Using UV-visible spectrophotometry, the detection limit of the developed method was 8.5 × 10 -7 M. The proposed method has been successfully applied for determination of Hg(II) ions in tap and lake water samples with precision better than 5%.

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“…More data are needed on Pt biogeochemical cycle, behavior and speciation since all those parameters vary according to the system. Thus, a recent comparison between current and 20 year old dissolved Pt concentration profiles show that anthropogenic Pt has little effect on dissolved Pt in the open oceans (Suzuki et al, 2014). Our study suggests that coastal waters are more affected by atmospherically-derived anthropogenic Pt.…”

Section: Platinum Bioconcentration In Wild Oystersmentioning

confidence: 51%

Past and present platinum contamination of a major European fluvial–estuarine system: Insights from river sediments and estuarine oysters

et al. 2016

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Platinum Group Metals (PGM) are modern, technologically relevant elements for which (i) the anthropogenic cycle has outcompeted the natural cycles and (ii) environmental behavior, fate and impact are still widely unknown. Stripping voltammetry was used for accurate determinations of platinum (Pt) in historical records of river sediments and estuarine oysters from the Gironde fluvial-estuarine continuum (SW France) comprising the Lot River. Sediment cores from the Lot River, dated from 1952 to 2001, showed past Pt contamination due to former industrial (smelter) activities in the Lot River watershed. These samples revealed the phasing-out of a historical Pt contamination with Pt/Th (Thorium) values of 11 × 10− 5 ± 0.79 × 10− 5 for the deepest part of the core which is clearly greater than the regional geochemical background value (Pt/Th ~ 2.2 × 10− 5 ± 0.68 × 10− 5). Wild oyster samples from the mouth of the Gironde Estuary collected from 1981 to 2013 showed Pt concentrations ranging from 0.80 ± 0.01 pmol.g− 1 to 3.10 ± 0.14 pmol.g− 1. Oyster samples have recorded the phasing-out of the smelter-related historical industrial Pt contamination and empirical modelling suggests the recent rise of a new source of Pt to the system. Temporal variations of Pt in oysters attributed to this recent source reflect the exponential increase of Pt demand for car catalytic converters, pointing towards the increasing importance of this emerging source to the aquatic system. Estuarine oysters prove to be suitable bioindicators for Pt contamination providing sensitive monitoring of emission variations over time. Furthermore, oysters may bioconcentrate Pt (Bioconcentration Factor, BCF ~ 103) and transfer this metal contamination to the higher food chain. These findings highlight the need for a deeper understanding of environmental Pt contamination, processes and possible adverse effects to biota. Please note that this is an author-produced PDF of an article accepted for publication following peer review. The definitive publisher-authenticated version is available on the publisher Web site.

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Precise determination of dissolved platinum in seawater of the Japan Sea, Sea of Okhotsk and western North Pacific Ocean

Cited by 38 publications

References 43 publications

Spatial variability and sources of platinum in a contaminated harbor – tracing coastal urban inputs

Spatial variability and sources of platinum in a contaminated harbor – tracing coastal urban inputs

Colorimetric Detection of Mercury(II) Ion in Aqueous Solution Using Silver Nanoparticles

Past and present platinum contamination of a major European fluvial–estuarine system: Insights from river sediments and estuarine oysters

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