Optimizing the Biosorption Behavior of Ludwigia stolonifera in the Removal of Lead and Chromium Metal Ions from Synthetic Wastewater

Yasser A. El-Amier, Ashraf Elsayed, Mohamed A. El-Esawi, Ahmed Noureldeen, Hadeer Darwish and Hala Fakhry
Additional contact information
Yasser A. El-Amier: Botany Department, Faculty of Science, Mansoura University, Mansoura 35516, Egypt
Ashraf Elsayed: Botany Department, Faculty of Science, Mansoura University, Mansoura 35516, Egypt
Mohamed A. El-Esawi: Botany Department, Faculty of Science, Tanta University, Tanta 31527, Egypt
Ahmed Noureldeen: Department of Biology, College of Sciences, Taif University, P.O. Box 11099, Taif 21944, Saudi Arabia
Hadeer Darwish: Department of Biotechnology, College of Sciences, Taif University, P.O. Box 11099, Taif 21944, Saudi Arabia
Hala Fakhry: City of Scientific Research and Technological Applications (SRTA-City), New Borg El-Arab City P.O. Box 21934, Egypt

Sustainability, 2021, vol. 13, issue 11, 1-15

Abstract: In this study, a natural low-coast, efficient, and eco- bio-sorbent plant material ( Ludwigia stolonifera ), with both parts of the root and shoot, were studied for the removal of the cationic metal ions, lead Pb 2+ and chromium Cr 6+ , via batch mode experiments to evaluate their maximum adsorption capacity, and held a comparison between the used bio-sorbent roots and shoots, based on the highest bio-sorption potential. Optimization of the bio-sorption parameters, such as contact time, pH, bio-sorbent (root and shoot) dosage, and initial ion concentration was conducted. The results indicated that 1.6 g of the used bio-sorbent shoot material removed 81.4% of Pb 2+ , and 77% of Cr 6+ metal ions from liquid media under the conditions of 100 ppm of initial metal ions concentration at room temperature for 60 min of contact time with the static condition. Different isotherms and kinetic models were fit to the experimental data to understand the nature of the bio-sorption process. The experimental data were best fit by the pseudo-second-order kinetic model with a high correlation coefficient (R 2 = 0.999), which reveals the chemisorption nature of the bio-sorption process. The chemical and structural analysis of the used bio-sorbent, before and after Cr 6+ and Pb 2+ bio-sorption, were performed using different techniques of characterization, such as Scanning Electron Microscopy (SEM) and Fourier-transform infrared spectroscopy (FTIR). The used bio-sorbent proved to be a low-cost, efficient, and eco-friendly material to remove heavy metal ions from aqueous solutions.

Keywords: wastewater treatment; heavy metals bio-sorption; Cr 6+; Pb 2+; equilibrium isotherms; kinetic studies (search for similar items in EconPapers)
JEL-codes: O13 Q Q0 Q2 Q3 Q5 Q56 (search for similar items in EconPapers)
Date: 2021
References: View complete reference list from CitEc
Citations: View citations in EconPapers (1)

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