Abstract
Copper hydrotalcites with and without adsorbed chlorophyllin exhibit a bactericidal effect that depends on the copper release and the basicity, which can be tuned through the chlorophyllin adsorption. The prepared solids performed well for the elimination of Escherichia coli, Enterobacter aerogenes, Salmonella enterica, and Staphylococcus aureus bacteria. The results showed that the copper-containing hydrotalcite with the adsorbed chlorophyllin is the most active material. Wastewaters from a metal industry were treated with these hybrid compounds, and the bactericidal effect was comparable with the results reported using more complex methods such as photocatalysis. Furthermore, one main advantage of these hybrid compounds is its low human toxicity compared with silver-containing materials.
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Acknowledgments
Geolar Fetter at the Universidade de Caxias do Sul was a kind host during the sabbatical period and is gratefully acknowledged. CNPq, FAPERGS (Brazil), and CONACYT (Mexico) are also acknowledged for the financial support. The XRD and SEM technical expertise of Efraín Rubio (CUV-IT, BUAP) is also appreciated.
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The main highlights of this work are
• Microwave irradiation is an alternative method to obtain chlorophyllin/copper hydrotalcites.
• Copper-containing hydrotalcites has a bactericide effect.
• Copper disposal and hydrotalcite basicity determined the bactericidal activity.
• Chlorophyllin/copper hydrotalcite was most effective to treat wastewater.
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Rocha Oliveira, G., Dias do Amaral, L.J., Giovanela, M. et al. Bactericidal Performance of Chlorophyllin-Copper Hydrotalcite Compounds. Water Air Soil Pollut 226, 316 (2015). https://doi.org/10.1007/s11270-015-2585-1
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DOI: https://doi.org/10.1007/s11270-015-2585-1