Active carbon double-electrode system-based heavy metal electrochemical sensor and method for detection of heavy metals by the active carbon double-electrode system-based heavy metal electrochemical sensor

Abstract

The invention discloses an active carbon double-electrode system-based heavy metal electrochemical sensor. The active carbon double-electrode system-based heavy metal electrochemical sensor comprises a work electrode and an auxiliary electrode. The work electrode and the auxiliary electrode are respectively connected to an electrochemical workstation by leads. The auxiliary electrode is prepared from active carbon. The active carbon double-electrode system-based heavy metal electrochemical sensor does not adopt a reference electrode adopted by the traditional three-electrode system, does not need regular maintenance, prolongs a sensor service life and reduces a maintenance cost. The invention also discloses a method for detection of heavy metals by the active carbon double-electrode system-based heavy metal electrochemical sensor. The method utilizes a square wave anodic stripping voltammetry method to determine a heavy metal concentration, has high detection sensitivity, good reappearance and high stability, realizes recycle of the electrodes only by electrocleaning, can be operated simply, has low energy consumption and can be used for on-site real-time monitoring of heavy metals.

Description

technical field [0001] The invention belongs to the field of electrochemical detection, in particular to a heavy metal electrochemical sensor based on an activated carbon two-electrode system and a detection method thereof. Background technique [0002] In recent years, it has become an indisputable fact that heavy metal pollution in various water environments has become increasingly serious. With the development of large-scale industry, heavy metal pollution has become one of the most harmful pollutions. Due to its characteristics of high toxicity, easy enrichment, and refractory degradation, it seriously threatens the survival of human beings and aquatic organisms. In order to reflect the actual situation of the water environment in a timely manner, it is necessary to monitor it in real time, so as to improve efficiency and reduce costs. Therefore, the development of high-sensitivity, low-cost, and miniaturized heavy metal sensors to realize online real-time monitoring of...

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Problems solved by technology

[0006] Aiming at the problem that the existing three-electrode system sensor has high maintenance cost and is easy to pollute the sample to be tested during online detection, the present invention provides a heavy metal electrochemical sensor with two-electrode system, which does not require regular maintenance and can maintain a stable Potential, suitable for real-time monitoring of heavy metals in various water environments

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