IN-SITU DETECTION OF HEAVY METAL POLLUTION IN SEAWATER WITH DIAMOND COATED ELECTRODES
At a Glance
Section titled āAt a Glanceā| Metadata | Details |
|---|---|
| Publication Date | 2018-04-25 |
| Journal | Surface Review and Letters |
| Authors | Bin Zhao, Jia Li, Xiang Yu, Jing Zhang, Yi Ren |
| Institutions | China University of Geosciences (Beijing) |
| Citations | 4 |
Abstract
Section titled āAbstractāHeavy metal pollution endangers seawater and there is urgent need for the development of effective detectors that can provide warning of heavy metal pollution. Anodic stripping voltammetry is applicable for the detection of heavy metal pollution in sea water, but it suffers from two problems that are associated with the mercury electrode used: one is insufficient sensitivity and the other is secondary pollution caused by toxic mercury. In this work, we employed boron-doped diamond electrode as an alternative to mercury electrode for the detection of heavy metals. The BDD electrode was fabricated and its electrochemical properties were ascertained. The results of this work showed that: (1) the electrode prepared has a wide electrochemical window (4.2 V) and low background current ([Formula: see text]A). (2) multiple heavy metals (Pb[Formula: see text], Cd[Formula: see text], Zn[Formula: see text] and Cu[Formula: see text]) in seawater samples are detected simultaneously with the optimized electrode, with high sensitivity and good repeatability. (3) the repeatability of the detection meets the values stipulated in the national standard. The detection period is less than 15[Formula: see text]min, and in situ monitoring of heavy metals in seawater can be achieved by automatic sampling and wireless data transmission.