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Environments 2017, 4(1), 1;

Bioremoval of Phenol from Aqueous Solutions Using Native Caribbean Seaweed

Science Department, Borough of Manhattan Community College, The City University of New York, New York, NY 10007, USA
Department of Chemistry, University of Puerto Rico at Rio Piedras, San Juan, PR 00931, USA
Department of Environmental Sciences, University of Puerto Rico at Rio Piedras, San Juan, PR 00931, USA
Author to whom correspondence should be addressed.
Academic Editor: Yu-Pin Lin
Received: 8 July 2016 / Revised: 5 December 2016 / Accepted: 7 December 2016 / Published: 22 December 2016
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Among several Puerto Rican algae, Sargassum sp. (SG) and Chaetomorpha (CM) showed the highest phenol adsorption capacity from aqueous solutions and were used in optimized adsorption batch experiments at room temperature. The effects of pH, adsorbent dose, phenol concentration, salinity and presence of interfering substances were evaluated. Initial solution pH exhibited a strong effect, mainly on the phenol aqueous chemistry; showing the maximum adsorption at pH 10. Sorption isotherm results were modelled according to the Langmuir, Tempkin and Freundlich equations. Isotherm modelling indicated a maximum adsorption capacity (qmax) of 82.10 and 17.7 mg of phenol per gram of SG and CM, respectively. Salinity and presence of detergent in the matrix solution showed a positive effect on the adsorption, suggesting that adsorption of phenol was mostly driven by polar forces and not by ionic exchange. On the other hand, presence of heavy metals like copper, lead and cobalt had a negative effect on the adsorption. According to these results, the potential formation of hydrogen bonds between the algae and phenol is proposed as the main adsorption mechanism. These results provide further insight into the adsorption mechanism of phenol and their use as inexpensive adsorbents for the treatment of phenol-containing wastewaters. View Full-Text
Keywords: adsorption; marine algae; phenol; pH; isotherm adsorption; marine algae; phenol; pH; isotherm

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Navarro, A.E.; Hernandez-Vega, A.; Masud, M.E.; Roberson, L.M.; Diaz-Vázquez, L.M. Bioremoval of Phenol from Aqueous Solutions Using Native Caribbean Seaweed. Environments 2017, 4, 1.

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