Evaluation of DGT as a metal speciation tool in wastewater

Buzier, Rémy; Tusseau‐Vuillemin, Marie‐Hélène; Mouchel, Jean-Marie

doi:10.1016/j.scitotenv.2005.09.051

Cited by 58 publications

(47 citation statements)

References 43 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…1) demonstrated that Zn, Ni, Cd and Co were the four metals with concentrations more similar than those obtained in ultrapure water. Recovery values obtained for these metals were close to 100% (±10%) in both matrices and deployment times; these results agree with previously published results (Denney et al 1999;Buzier et al 2006b). In terms of precision, the RSD (%) values obtained for these metals were lower or equal than those obtained in ultrapure water.…”

Section: Study Of Dgt Device In River and Treated Water: Matrix Ef Fectsupporting

confidence: 91%

Monitoring of (bio)available labile metal fraction in a drinking water treatment plant by diffusive gradients in thin films

Dı́az

Arnedo

Céspedes-Sánchez

et al. 2011

Environ Monit Assess

View full text Add to dashboard Cite

A performance study of diffusive gradients in thin films (DGT) and inductively coupled plasma optical emission spectrometry (ICP-OES) was applied for the monitoring of the labile fraction of metals Al, Cd, Co, Cr, Cu, Fe, Mn, Ni, Pb and Zn, in Sant Joan Despí Drinking Water Treatment Plant located in the South of Barcelona's Metropolitan Area (Spain). The DWTP monitoring protocol was optimized by working for 1 day of deployment (24 h) with the DGT device in contact with both treated and river water matrixes. Additionally, it was demonstrated that an increase in the deployment time of 1 week did not decrease the evaluated concentrations of the studied metals. The quality parameters of the DGT device and ICP-OES determination, such as limit of quantification, accuracy expressed as relative error (%) and reproducibility expressed as relative standard deviation, were evaluated. Good results were obtained for all the metals in ultrapure water; limits of quantification ranged from 1.5 μg L( - 1) for cadmium to 28 μg L( - 1) for zinc when deployment time of 24 h was used and from 0.2 μg L( - 1) for cadmium to 4 μg L( - 1) for zinc when this time was increased by 1 week. Accuracy and precisions lower than or equal to 10% were obtained at a parametric concentration value of the metals regulated in the European Drinking Water Guidelines (98/83/EC). DGT deployment was tested in river and treated water, and good results were obtained for Cd, Ni, Co and Zn, whereas for the other metals, a continuous control of their metallic labile fractions was monitored. Therefore, DGT device allows the continuous monitoring of the labile metal species in a drinking water treatment plant.

show abstract

Section: Study Of Dgt Device In River and Treated Water: Matrix Ef Fectsupporting

confidence: 91%

Monitoring of (bio)available labile metal fraction in a drinking water treatment plant by diffusive gradients in thin films

Dı́az

Arnedo

Céspedes-Sánchez

et al. 2011

Environ Monit Assess

View full text Add to dashboard Cite

show abstract

“…For instance, it is likely that DOM also plays a protective role on the biofilm micro-organisms in the biofilm suspensions as has previously been shown (Campbell 1995;Morel 1983)-more recently such a protective role of anthropic DOM from filtered wastewater samples on Daphnia magna was also uncovered (Buzier et al 2006). However in complex, heavily-loaded biofilm suspensions, it is likely that the metal/particles equilibrium is predominant.…”

Section: Resultsmentioning

confidence: 74%

Adapting an enzymatic toxicity test to allow comparative evaluation of natural freshwater biofilms’ tolerance to metals

Fechner¹,

Gourlay-Francé²,

Uher³

et al. 2010

Ecotoxicology

Self Cite

View full text Add to dashboard Cite

A simple, low-cost and non-radioactive short-term toxicity test was developed to study the effects of urban metals on natural freshwater periphytic communities. β-glucosidase activity of natural freshwater biofilms collected in situ was chosen as an endpoint. Metals (Cd, Cu, Ni, Pb, and Zn) successfully inhibited bacterial enzymatic activity after a 1-h exposure enabling the calculation of EC(50). The EC(50) value of a biofilm sample varied with the Total Suspended Solids concentration (TSS) of the biofilm suspension, showing that EC(50) values (expressed as total added metal concentrations) are not representative of the bioavailable metal concentration during the toxicity test. For Cu, Cd, Ni, Zn and Pb, the EC(50) values increased linearly with the TSS concentration leading us to define a normalized EC(50): the value of the EC(50) divided by the corresponding TSS concentration. Normalized EC(50) proved to be a robust, reliable way to assess metal tolerance of a biofilm for Cd, Cu, Ni, Zn and Pb. Normalized EC(50) obtained, expressed as kg(metal)/g(TSS), varied between 0.2 to 7.6 for Cu, 1 to 8 for Cd, 1.8 to 92.3 for Ni, 1.8 to 76.6 for Zn and 25 to 189 for Pb.

show abstract

“…As an infinite sink for metals, metal binding to the DGT device could continue uninhibited, whereas in adverse conditions such as metal toxicity in soil, already alluded to, metal uptake by plants can be regulated through the mechanism of homeostasis. There is also some evidence showing that DGT could accumulate some amounts of inert organic complexes of metals (Buzier et al 2006), as is possible in these garden fields irrigated with wastewater, and with relatively high OC. Such organic complexes of the metals are not readily bioavailable as the inorganic complexes.…”

Section: Dgt Measured Metal Concentration and Plant Uptakementioning

confidence: 99%

“…Metal uptake by plants subjected to toxic concentration had often decreased, whereas metal binding to DGT resin might not (Almas et al 2006), thereby leading to negative and complicated relationship between CE and plant metal uptake. As a passive sink in soil, the DGT may not be effective in capturing the dynamics of nutrient uptake which is an active process (Buzier et al 2006;Cattani et al 2006). As an infinite sink for metals, metal binding to the DGT device could continue uninhibited, whereas in adverse conditions such as metal toxicity in soil, already alluded to, metal uptake by plants can be regulated through the mechanism of homeostasis.…”

Section: Dgt Measured Metal Concentration and Plant Uptakementioning

confidence: 99%

Bioavailability of copper, cadmium, zinc, and lead in tropical savanna soils assessed by diffusive gradient in thin films (DGT) and ion exchange resin membranes

Agbenin

Welp

2011

Environ Monit Assess

View full text Add to dashboard Cite

The technique of diffusion gradient in thin films (DGT) for assessing bioavailable metals has not been tested under field conditions. We assessed the relationships of DGT- and cation exchange resin-membrane-measured concentrations of Cd, Cu, Pb, and Zn with plant uptake of the metals under greenhouse and field conditions. In the greenhouse, the effective concentrations of Cu, Pb, and Zn by DGT correlated significantly with uptake by sorghum (Sorghum bicolor), but cation exchange resin-membrane-measured concentrations of Cd, Pb, and Zn did not correlate with sorghum uptake. In the field, the DGT-measured concentrations of Cd, Pb, and Zn were not linearly related to uptake Cd, Pb, and Zn by lettuce (Lactuca sativa) except for Cu uptake (r = 0.87, p < 0.05). Similarly, it was only the resin-membrane-extractable Pb that correlated with Pb uptake by lettuce (r = 0.77; p < 0.05). However, fitting non-linear regression models improved the plant metal uptake predictions by DGT-measured bioavailable Cd, Cu, Pb, and Zn under field conditions. In conclusion, the DGT technique was fairly predictive of bioavailability in the greenhouse, but not in the field.

show abstract

Evaluation of DGT as a metal speciation tool in wastewater

Cited by 58 publications

References 43 publications

Monitoring of (bio)available labile metal fraction in a drinking water treatment plant by diffusive gradients in thin films

Monitoring of (bio)available labile metal fraction in a drinking water treatment plant by diffusive gradients in thin films

Adapting an enzymatic toxicity test to allow comparative evaluation of natural freshwater biofilms’ tolerance to metals

Bioavailability of copper, cadmium, zinc, and lead in tropical savanna soils assessed by diffusive gradient in thin films (DGT) and ion exchange resin membranes

Contact Info

Product

Resources

About