Reduction of copper ions by novel ecofriendly electropolimerized nanolayer obtained from a natural compound (carvacrol)

BERTUOLA M; C.A. GRILLO; M. FERNÁNDEZ LORENZO

JOURNAL OF HAZARDOUS MATERIALS.

ELSEVIER SCIENCE BV

Lugar: Amsterdam; Año: 2016 vol. 313 p. 262 - 271

0304-3894

The release of copper ions by copper-containing devices, equipments and facilities represents a poten-tial risk for biological systems. Different inhibitory treatments (CuIT) that use organic compounds havebeen proposed to reduce this environmental hazard but many of them are not in accordance with newregulations. The development of an ecofriendly CuIT based on the use of carvacrol, a natural phenoliccompound present in essential oils, is reported here. The effects of carvacrol adsorption (adCarv) and itselectropolymerization (polyCarv) were examined. Electropolymerization was attained after cycling thecopper electrode in the 0.3?1.0 V potential range. Electrochemical techniques complemented by ATR-FTIR, XPS, SEM and AFM surface analyses were used to evaluate the composition and characteristicsof the layers. Results demonstrated that adCarv includes cetonic structures while polyCarv additionallycontains ether bonds. AFM and SEM observations showed the presence of round nanoglobules, larger foradCarv (close to 50 nm diameter). Cytotoxicity of adCarv and polyCarv layers on copper was also evalu-ated. The comparative analysis of both treatments revealed that polyCarv nanolayer is highly protectivewhile the adCarv layer is weakly protective and reduction in cell viability was found. It was concludedthat CuIT that leads to polyCarv nanolayer is very effective and ecofriendly.