Boron‐Doped Diamond as an All‐In‐One System for the Mineralization and Detection of Lead in Waters
At a Glance
Section titled “At a Glance”| Metadata | Details |
|---|---|
| Publication Date | 2019-02-15 |
| Journal | ChemElectroChem |
| Authors | Luca Pujol, David Evrard, Pierre Gros, Mathilde Freyssinier, Audrey Ruffien-Cizsak |
| Institutions | Centre National de la Recherche Scientifique, Université Toulouse III - Paul Sabatier |
| Citations | 10 |
Abstract
Section titled “Abstract”Abstract Boron‐doped diamond (BDD) electrodes were used in a single‐compartment electrochemical cell to monitor the degradation of organic matter (OM) and the detection of lead in water. Using sulfuric acid as the electrolyte, the mineralization step was almost complete after 20 min under galvanostatic electrolysis conditions, irrespective of the OM [i. e. phenol or humic acid (HA)]. Nevertheless, H 2 SO 4 was not suitable for samples containing Pb(II), as it induces PbSO 4 precipitation. On the other hand, the use of HNO 3 resulted in a decrease in the HA degradation yield to 30 %, but remained at 90 % for phenol without any interference with respect to lead detection. Under these latter experimental conditions, the assay of Pb(II) was performed by using differential pulse anodic stripping voltammetry. The BDD electrode exhibited a linear response in the range 1-10 ppm with a normalized sensitivity of 2.66 nC ppm −1 min −1 . Accurate results were obtained in solutions containing 20 ppm phenol, as compared to reference technique analysis.