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Int J Environ Res Public Health. 2019 Sep 29;16(19). pii: E3663. doi: 10.3390/ijerph16193663.

Removal of Cypermethrin from Water by Using Fucus Spiralis Marine Alga.

Author information

1
"Vasile Alecsandri" University of Bacău, Faculty of Engineering, 157 Mărăşeşti Str., 600115 Bacău, Romania. violeta10nvn@gmail.com.
2
"Vasile Alecsandri" University of Bacău, Faculty of Engineering, 157 Mărăşeşti Str., 600115 Bacău, Romania. mirelap@ub.ro.
3
"Vasile Alecsandri" University of Bacău, Faculty of Engineering, 157 Mărăşeşti Str., 600115 Bacău, Romania. emos@ub.ro.
4
"Aurel Vlaicu" University of Arad, Faculty of Food Engineering, Tourism and Environmental Protection, 2-4 E. Drăgoi Str., 310330 Arad, Romania. simona2213@yahoo.com.
5
Preclinical Department, Faculty of Medicine, Lucian Blaga University of Sibiu, 550024 Sibiu, Romania. gabriela.cioca@ulbsibiu.ro.
6
"Vasile Alecsandri" University of Bacău, Faculty of Engineering, 157 Mărăşeşti Str., 600115 Bacău, Romania. florentina.munteanu@uav.ro.
7
"Aurel Vlaicu" University of Arad, Faculty of Food Engineering, Tourism and Environmental Protection, 2-4 E. Drăgoi Str., 310330 Arad, Romania. florentina.munteanu@uav.ro.

Abstract

Alpha-cypermethrin is a synthetic pyrethroid that was extensively used for insect control, since the early 1980s. However, it is known that its presence in the environment has toxic effects on humans and aquatic life forms. For this reason, it is commendable for it to be removed completely from the contaminated environment. In this study, we evaluated the adsorption capacity of a marine alga for the removal of cypermethrin from water. The adsorption experiments were performed based on the batch equilibrium technique. The samples containing the pesticide were analyzed using gas chromatography with an electron capture detector, after liquid-liquid extraction in hexane. The results obtained from the kinetic adsorption studies showed that the equilibrium time was attained after 40 min. The adsorption parameters at equilibrium concentrations, obtained through the Langmuir, Freundlich, and Temkin models, showed that the used brown marine alga has a maximum amount of adsorbed cypermethrin of 588.24 µg/g. The correlation coefficients obtained for each model prove that the Langmuir model best fits the experimental data.

KEYWORDS:

alpha-cypermethrin; brown marine algae; detoxification; isotherms; kinetics

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