Geochemical behavior of metals–sulfide–phosphorus at SWI (sediment/water interface) assessed by DGT (Diffusive gradients in thin films) probes

Wu, Zhihao; Wang, Shengrui; Jiao, Lixin

doi:10.1016/j.gexplo.2015.05.005

Cited by 26 publications

(7 citation statements)

References 54 publications

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“…DGT devices equipped with different binding resins can be, and have been, used in simultaneous deployments to provide data for a wider range of elements. For example, Chelex and ferrihydrite devices have been simultaneously deployed to assess the geochemical behaviour of sulphide, metals and P in sediments (Wu et al, 2015). The DGT technique has recently been modified to detect labile Au at solution concentrations less than 1 ng/ L over a 7-day deployment (Lucas et al, 2012).…”

Section: Introductionmentioning

confidence: 99%

Spatial and temporal distribution of Au and other trace elements in an estuary using the diffusive gradients in thin films technique and grab sampling

Lucas

Salmon

Rate

et al. 2015

Geochimica et Cosmochimica Acta

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Section: Introductionmentioning

confidence: 99%

Spatial and temporal distribution of Au and other trace elements in an estuary using the diffusive gradients in thin films technique and grab sampling

Lucas

Salmon

Rate

et al. 2015

Geochimica et Cosmochimica Acta

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“…Samples of the ground roots (∼0.2 g) were digested with 10 mL concentrated acid (concentrated H 2 SO 4 –HNO 3 –HClO 4 , 1:8:1 v/v/v) , before analysis (SI A). Molybdate blue colorimetry method , for P and HR-ICP-MS , for metals were used for digestion solution of sediments and plants (SI A).…”

Section: Materials and Methodsmentioning

confidence: 99%

“…Macrophytes can change Eh, pH, and organic matter (OM) in rhizosphere sediment. − Fe-plaque existing on macrophyte root surface due to O 2 released from root can serve as a sink for trace metals and P. − P sorption capacity in sediments is related to ferric oxyhydroxides or hydroxide, aluminum hydroxide and calcium carbonate. , Hypolimnetic P release occurs under anoxic condition that leads to the reductive dissolution of ferric hydroxide. − It also causes the release of trace metals into porewater . P bioavailability in macrophyte rhizosphere is dependent on P forms (inorganic P and organic P) in sediment solution, chemical and physical factors such as pH, Eh, temperature, water dynamic conditions, P fractions in solid, and P release from solid into solution. , …”

Section: Introductionmentioning

confidence: 99%

Transfer Mechanism, Uptake Kinetic Process, and Bioavailability of P, Cu, Cd, Pb, and Zn in Macrophyte Rhizosphere Using Diffusive Gradients in Thin Films

Wang

Luo

2018

Environ. Sci. Technol.

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The transfer-uptake-bioavailability of phosphorus (P), Cu, Cd, Zn, and Pb in rhizosphere of Zizania latifolia (ZL) and Myriophyllum verticiilaturn (MV) cultivated in rhizoboxes in Lake Erhai (China) is evaluated by DGT (diffusive gradients in thin films) technique. DGT induced fluxes in sediments (DIFS) model reveals that resupply ability (r), liable pool size in sediment solid (k), kinetic parameter (k), or response time (T) control the diffusion-resupply characters of P and Cu (standing for four metals) in rhizosphere interface. The linear fitting curves of element content in ZL or MV roots (C) against DGT (C), porewater (C), or sediment concentration demonstrate that C for five elements can be predicted by C more effectively than the other methods. (I) DOC (dissolved organic carbon) in porewater controlled by OM (organic matter) in solid plus pH for Cu and Cd or (II) DOP/DTP ratio in porewater (between dissolved organic P and dissolved total P) for P controlled by Fe-bound P and OM in solid, can affect phytoavailability in rhizosphere. They lead to (I) the larger slope (s) and the linear regression coefficient (R) in the first part than those for the complete fitting curve (ZL or MV root against C(Cu) or C(Cu) and MV root against C(Cd)) or (II) the outliers above or below the fitting curve (ZL root (P) against C(P) or C(P)) and the larger R without outliers. DGT-rhizobox-DIFS should be a reliable tool to research phytoremediation mechanism of macrophytes.

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“…Labile trace metals are composed of inorganic and weak complexes (Gourlay-Francé et al, 2011). There are factors that can eventually cause the decrease of concentration of trace metals such as desorption (Stillings et al, 2008;Garnier et al, 2006;Schmukat et al, 2013) and precipitation (Han et al, 2013;Wu et al, 2015). Hence, the question highlights on, in general, what is the maximum average concentration that can be detected and in which sampling regime (considering the days of immersion).…”

Section: Water Quality Managementmentioning

confidence: 99%

Labile trace metal contribution of the runoff collector to a semi-urban river

Villanueva

Granger

Binet

et al. 2016

Environ Sci Pollut Res

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In this study, the distribution of labile trace metals (LTMs; Cd, Co, Cr, Cu, Ni, Pb, and Zn) in a semi-urban runoff collector was examined to assess its influence to a natural aqueous system (Jalle River, Bordeaux, France). This river is of high importance as it is part of a natural reserve dedicated to conserving aquatic flora and fauna. Two sampling campaigns with a differing precipitation condition (period 1, spring season; and period 2, summer season associated with storms) were considered. Precipitation and water flow were monitored. The collector is active as it is receptive to precipitation changes. It influences the river through discharging water, contributing LTMs, and channeling the mass fluxes. During period 2 where precipitation rate is higher, 25 % of the total water volume of the river was supplied by the collector. LTMs were detected at the collector. Measurements were done by using diffusive gradient in thin films (DGT) probes deployed during 1, 7, and 14 days in each period. The results showed that in an instantaneous period (day 1 or D1), most of these trace metals are above the environmental quality standards (Cd, Co, Cr, and Zn). The coefficient of determination (r (2) > 0.50) employed confirmed that the LTM concentrations in the downstream can be explained by the collector. While Co and Cr are from the upstream and the collector, Cd, Cu, and Zn are mostly provided by the collector. Ni, however, is mostly delivered by the upstream. Using the concentrations observed, the river can be affected by the collector in varying ways: (1) adding effect, resulting from the mix of the upstream and the collector (if upstream ˂ downstream); (2) diluted (if upstream ˃ downstream); and (3) conservative or unaffected (upstream ~ downstream). The range of LTM mass fluxes that the collector holds are as follows: (1) limited range or ˂10 g/day, Cd (0.04-1.75 g/day), Co (0.08-05.42 g/day), Ni (0.06-1.45 g/day), and Pb (0.08-9.89 g/day); (2) moderate range or 11-50 g/day, Cr (0.23-33.26 g/day) and Cu (0.77-37.88 g/day); and (3) wide range or ˃50 g/day, Zn (26.33-676.61 g/day). Hence, the collector is a major source of concern in terms of contamination. This is as the water with considerable LTMs is channeled openly to the river without any treatment.

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Geochemical behavior of metals–sulfide–phosphorus at SWI (sediment/water interface) assessed by DGT (Diffusive gradients in thin films) probes

Cited by 26 publications

References 54 publications

Spatial and temporal distribution of Au and other trace elements in an estuary using the diffusive gradients in thin films technique and grab sampling

Spatial and temporal distribution of Au and other trace elements in an estuary using the diffusive gradients in thin films technique and grab sampling

Transfer Mechanism, Uptake Kinetic Process, and Bioavailability of P, Cu, Cd, Pb, and Zn in Macrophyte Rhizosphere Using Diffusive Gradients in Thin Films

Labile trace metal contribution of the runoff collector to a semi-urban river

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