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Evaluation of the Electrochemical Behavior of Pentachlorophenol by Cyclic Voltammetry on Carbon Paste Electrode Modified by Humic Acids
Author(s) -
Airoldi Flávia P. S.,
Da Silva Wilson T. L.,
Crespilho Frank N.,
Rezende Maria O. O.
Publication year - 2007
Publication title -
water environment research
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.356
H-Index - 73
eISSN - 1554-7531
pISSN - 1061-4303
DOI - 10.2175/106143005x86646
Subject(s) - pentachlorophenol , cyclic voltammetry , electrode , humic acid , chemistry , electrochemistry , carbon paste electrode , carbon fibers , inorganic chemistry , environmental chemistry , organic chemistry , materials science , fertilizer , composite material , composite number
Humic substances, or natural recalcitrant organic matter, have an important role in the environment for their plant nutritional functions or for their capability to control the mobility of xenobiotic substances, such as pesticides. To verify the electrochemical behavior of pentachlorophenol (PCP), cyclic voltammetry was used because of its versatility. The following two different electrodes were used: carbon paste electrode (CPE) and carbon paste electrode chemically modified with humic acid (HACMCPE). The results demonstrated that PCP was better accumulated at the HACMCPE electrode, as a consequence of a larger current signal than at the CPE electrode. Cyclic voltammograms showed oxidation steps of PCP itself and probable production of quinonelike compounds.