Toxic Metals Biosorption by Jatropha curcas Deoiled Cake: Equilibrium and Kinetic Studies

Abstract

The equilibrium sorption of Cr(VI) and Cu(II) from aqueous solution using Jatropha curcas deoiled cake, has been studied with respect to adsorbent dosage, contact time, pH, and initial metal concentration in batch mode experiments. Removal of Cu(II) by deoiled cake was greater than that of Cr(VI). The adsorbent chemical characteristics, studied by Fourier transform-infrared analysis, suggested that the presence of Cr(VI) and Cu(II) in the biomass influenced the bands corresponding to hydroxyl and carboxyl groups. Desorption studies revealed that maximum metals recovery was achieved by HNO3 followed by CH3COOH and HCl. The Freundlich isotherm model showed good fit to the equilibrium adsorption data. The adsorption kinetics followed the pseudo-second-order model, which provided the best correlation for the biosorption process, and suggested that J. curcas deoiled cake can be used as an efficient biosorbent over other commonly used sorbents for decontamination of Cr(VI)- and Cu(II)-containing wastewater.

Plants, animals, and fisheries waste-mediated bioremediation of contaminants of environmental and emerging concern (CEECs)—a circular bioresource utilization approach

“…The results appear to be consistent with the pseudo-second-order equation. Jatropha curcas deoiled cake, according to Rawat et al (2013), can be employed as a more e cient biosorbent than other regularly used sorbents for clean-up of wastewater containing Cr 6+ and Cu 2+ due to the presence of carboxyl and hydroxyl functional groups in biomass as indicated by FTIR analysis and pseudo-second-order model evident from adsorption kinetics. Abdolali et al (2015) prepared and characterized a novel biosorbent from a mixture of tea waste, maple leaves, and mandarin peels to adsorb multi-metals such as Cd, Cu, Pb, and Zn ions from an aqueous medium due to the major role played by carboxylate groups as evidenced from the FTIR spectra.…”

“…Du et al (2016) regenerated biosorbent laden with Pb(II), Cd(II), and Cu(II) easily using EDTA-2Na solution and re-used up to four times with an equivalently high adsorption capacity.Copper ions bound on alkali-treated leave powder of Hevea brasiliensis were capable of desorbing at > 99% with 0.05 mol/L HCl, 0.01 mol/L HNO 3 , and 0.01 mol/L EDTA solutions (2008). J. curcas deoiled cake desorption studies conducted byRawat et al (2013) revealed that maximum metals Cr(VI) and Cu(II)-recovery was rst evident in HNO 3 , trailed by CH 3 COOH and HCl. Desorption study conducted byNag et al (…”

Bioengineering to Accelerate Biodiesel Production for a Sustainable Biorefinery

“…Equilibrium sorption of Cu (II) from synthetic solution by Jatropha curcas deoiled cake was higher than Cr (VI) in terms of pH, adsorbent dosage, initial metal concentration and dosage time, which was best fitted by Freundlich isotherm model. Desorption involves the use of chemical reagents such as HNO 3 [ 83 ] or HCl [ 82 ] are used for maximum metal recovery. Activation of carbonized oil palm decanter cake (OPDC) exhibited higher adsorption capacities on Cu (II), Pb (II) and Zn (II), but was not found to be suitable for Cd (II) and Cr (VI) adsorption.…”

Agricultural Waste

“…Batch mode experiments were carried on adsorbent dosage, contact time, pH, and initial metal concentration, from which to investigate the sorption of Cr (VI) and Cu (II) f rom aqueous solution using Jatropha curcas deoiled cake (Rawat et al 2013). The results suggested that J. curcas deoiled cake could be an efficient biosorbent for removing Cr (VI) and Cu (II).…”