Lead Complexation by Humic Acids and Their Analogs: A Voltammetric Study
Differential pulse polarography (DPP) was used to assess the interaction of Pb<sup>2+</sup> with various humic acid analogs and several humic acids. DPP analysis demonstrated that the reduction peak maximum (E<sub>p</sub>) for Pb<sup>2+</sup> shifted to more negat...
| Main Authors: | , |
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| Format: | Article |
| Language: | English |
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MDPI AG
2020-10-01
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| Series: | Environments |
| Subjects: | |
| Online Access: | https://www.mdpi.com/2076-3298/7/11/94 |
| Summary: | Differential pulse polarography (DPP) was used to assess the interaction of Pb<sup>2+</sup> with various humic acid analogs and several humic acids. DPP analysis demonstrated that the reduction peak maximum (E<sub>p</sub>) for Pb<sup>2+</sup> shifted to more negative values in the presence of humic acids and humic acid analogs. The observed E<sub>p</sub> for Pb<sup>2+</sup> in the presence of humic acids and humic acid analogs is influenced by ligand concentration, solution pH and Pb<sup>2+</sup> concentration. Shifts in the E<sub>p</sub> for Pb<sup>2+</sup> are related to the reduction potential and can be rationalized using the Lingane equation. |
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| ISSN: | 2076-3298 |