Detection and Removal of Lead from Water Using Nanocomposite Film Electrode
Mentor 1
Woo Jin Chang
Start Date
28-4-2023 12:00 AM
Description
Lead (Pb2+) is a heavy metal that is toxic when consumed, especially in high quantities. The United States Environmental Protection Agency (EPA) recommends that water contain less than 15 parts lead per a billion parts water to be safe for consumption. Screen printed electrodes (SPEs) were chemically modified and used as Pb2+ detectors in water with very low concentrations of Pb2+ present. Previous studies have shown that these sensors can detect lead in concentrations as small as 0.07 ppb, but further studies must be conducted to verify the consistency of the sensors with different concentrations of lead. The modification of the SPEs begins with the synthesis of cysteine-functionalized graphene oxide (sGO). A solution of sGO and polypyrrole (PPy) was electrochemically deposited onto the surface of the SPE, causing a nanocomposite film to grow on the electrode surface. The sensor detects Pb2+ in water by first depositing Pb2+ on the working electrode surface. Then, anodic stripping voltammetry is used to collect a range of signals that can be interpreted to determine the amount of Pb2+ in a sample of water. Results from previous studies indicate that the sensors are effective in adsorption and removal of Pb2+ in water samples. The sensitivity of the synthesized sGO/PPy nanocomposite makes it an effective method for the detection and monitoring of heavy metal ions in water.
Detection and Removal of Lead from Water Using Nanocomposite Film Electrode
Lead (Pb2+) is a heavy metal that is toxic when consumed, especially in high quantities. The United States Environmental Protection Agency (EPA) recommends that water contain less than 15 parts lead per a billion parts water to be safe for consumption. Screen printed electrodes (SPEs) were chemically modified and used as Pb2+ detectors in water with very low concentrations of Pb2+ present. Previous studies have shown that these sensors can detect lead in concentrations as small as 0.07 ppb, but further studies must be conducted to verify the consistency of the sensors with different concentrations of lead. The modification of the SPEs begins with the synthesis of cysteine-functionalized graphene oxide (sGO). A solution of sGO and polypyrrole (PPy) was electrochemically deposited onto the surface of the SPE, causing a nanocomposite film to grow on the electrode surface. The sensor detects Pb2+ in water by first depositing Pb2+ on the working electrode surface. Then, anodic stripping voltammetry is used to collect a range of signals that can be interpreted to determine the amount of Pb2+ in a sample of water. Results from previous studies indicate that the sensors are effective in adsorption and removal of Pb2+ in water samples. The sensitivity of the synthesized sGO/PPy nanocomposite makes it an effective method for the detection and monitoring of heavy metal ions in water.
