Author:
CONTRERAS-BUSTOS Roberto, ,RAMOS-TAPIA José L. F.,MARTÍNEZ-HERNÁNDEZ Ana L.,JIMÉNEZ-BECERRIL Jaime,JIMÉNEZ-REYES Melania,CERCADO Bibiana, , , , ,
Abstract
The conditions for Cr(VI) adsorption by Lemna minor (LM) were analyzed. Regarding the macrophite the parameters were: growth rate and calcination temperature. Adsorption capacity of LM was measured as a function of the Cr(VI) concentration, stirring contact time, stirring speed, temperature, and pH; as well as considering the quantity of LM units and the LM root length. The data were well adjusted to the kinetic pseudo second order model and to the Langmuir isotherm model. Acid pH enhanced the adsorption because of the negative charge Cr (VI) and the protonated surface of the adsorbent material. Experiments by using a rinse water from the chromium plating process showed that cromium was successfully removed by LM. The best conditions were found for the adsorption process of Cr(VI) by LM.
Publisher
Romanian Academy - Revue Roumaine De Chimie
Reference26 articles.
1. "1. Namrah, F. Ammara and F. Muhammad, Pol. J. Environ. Stud., 2019, 28, 1561-1566.
2. 2. WHO (World Health Organization). Guidelines for drinking-water quality: fourth edition incorporating the first addendum. Geneva: World Health Organization; 2017. Licence: CC BY-NC-SA 3.0 IGO.
3. 3. L. McNeill, J. McLean, M. Edwards and J. Parks, State of the Science of Hexavalent Chromium in Drinking Water. Thecnical report (project paper) Water Research Foundation, 2012.
4. 4. W. Jin, H. Du, S. Zheng and Y. Zhang, Electrochim. Acta, 2016, 191, 1044-1055.
5. 5. C. He, L. Gu, Z. Xu, H. He, G. Fu, F. Han, B. Huang and X. Pan, Environ. Chem. Lett., 2020, 18(1), 561-576.