1 / 28

FACTORS AFFECTING LANTHANUM AND CERIUM BIOSORPTION BY Pinus Brutia LEAF POWDER

This research examines the biosorption potential of Pinus Brutia leaf powder in removing lanthanum and cerium from aqueous solutions. It explores the effectiveness, selectivity, and cost-efficiency of this eco-friendly technology.

famaya
Download Presentation

FACTORS AFFECTING LANTHANUM AND CERIUM BIOSORPTION BY Pinus Brutia LEAF POWDER

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript

  1. The Fifth Eurasian Conference FACTORS AFFECTING LANTHANUM AND CERIUM BIOSORPTION BY Pinus Brutia LEAF POWDER Ceren Kütahyalı, Şenol Sert, Berkan Çetinkaya, Süleyman İnan,Meral Eral Ege University, Institute of Nuclear Sciences, 35100, Bornova, Izmir, Turkey

  2. Outline The Fifth Eurasian Conference 2 14-17 October 2008 • La and Ce in Nuclear field • Biosorption • Adsorption experiments

  3. Introduction The Fifth Eurasian Conference Rare earth elements are widely used in the fields • Nuclear energy • Chemical engineering • Metallurgy • Electronics • Computers

  4. Introduction The Fifth Eurasian Conference Ce and La is the most abundant Lanthanides. • High purity grade cerium and lanthanum is required • nuclear powerproduction • catalyst for automobile and nuclear industries • Current applications of lanthanum as a pure element or in associationwith other compounds are in super alloys,catalysts, special ceramics, and in organic synthesis.

  5. Introduction The Fifth Eurasian Conference 5 14-17 October 2008 • In environmental point of view • increasing demand of the rare earth elements for several industrial areas, • monitoring and removal studies from waters and waste waters are important. Removal Technics • Precipitation • Ion exchange • Oxidation • Solvent extraction • Filtration • Electrochemical treatment • Membrane technologies advantages and limitations in application ineffective or extremely expensive

  6. Introduction The Fifth Eurasian Conference 6 14-17 October 2008 This has initiated research in new, low-cost materials for possible use as adsorbents. Alternative process; Adsorption/biosorption of heavy metals from aqueous solutions by biological materials. In contrast to traditional methods biosorption is • Competitive • Effective • Economical • eco-friendly technology.

  7. Objective The Fifth Eurasian Conference 7 14-17 October 2008 • Biosorbent materials for concentration and recovery of strategic or valuable heavy metals, nuclear fuel, or radioactive elements.

  8. Biosorption The Fifth Eurasian Conference 8 14-17 October 2008 • The removal of metal or metalloid species, compounds, particulates from solution by biological material. • The term biosorption refers to metal uptake by (microbial) biomass which may even be dead. • Biosorbent materials • seaweed • yeast • bacteria • fungi

  9. Biosorption The Fifth Eurasian Conference 9 14-17 October 2008 Biosorbents can be highly • selective, • efficient, • cheap. In general, biomass considered could be an industrial waste or naturally grown and collected material.

  10. Biosorption The Fifth Eurasian Conference 10 14-17 October 2008 Plant leaves have also been recommended as a simple inexpensive method to remove heavy metals from solutions.

  11. Biosorption The Fifth Eurasian Conference 11 14-17 October 2008 • Al-Subu described the removal of lead from aqueous solutions using leaves of three different plant species; cypress (Cupressus sempervirens), cinchona (Eucalyptus longifolio) and pine (Pinus halepensis). • Bhattacharyya and Sharma used dry Neem leaf powder, as an adsorbent for removal of toxic heavy metals such as Pb(II). • Kumar et al., investigated the potential use of untreated Tectona grandis L.f. biomass as metal sorbent for zinc from aqueous solution. • Ucun et al., used ovulate cone biomass of Pinus sylvestris as a biosorbent for Cr(VI) from artificial wastewaters and studied to determine the constants of the adsorption isotherm relation. M.M. Al-Subu, Adv. Environ. Res. 6 (2002) 569-576. H. Ucun, Y. K. Bayhan, Y. Kaya, A. Cakici, O. Faruk Algur, Bioresource Technol. 85 (2002) 155–158. K. G. Bhattacharyya, A. Sharma, J. Hazard. Mater. B113 (2004) 97–109. Y. P. Kumar, P. King, V.S.R.K. Prasad, Chem. Eng. J. 124 (2006) 63–70.

  12. The Fifth Eurasian Conference 12 14-17 October 2008 Despite their strategic and economic importance, only in the last few years some investigations have been published related to the removal of REEs by biomaterials; • Diniz and Volesky investigated the biosorption of La, Eu and Yb using Sargassum biomass. This study focuses on exploring the biosorption potential in the recovery of a light (La), intermediate (Eu) and a heavy (Yb) rare earth elements using Sargassum biomass in single- and multi-component metal systems. • Texier et al., investigate the selective sorption of three trivalent lanthanide (La, Eu, and Yb) ions by biomass from P. aeruginosa. • Palmieri et al., work on to develop a study on neodymium biosorption from acidic solution utilizing different types of biomass in batch experiments. V. Diniz, B. Volesky, Water Res. 39 (2005) 239–247. A. Texier, Y. Andrès, P. Le Cloirec, Environ. Sci. Technol. 33 (1999) 489-495. M.C. Palmieri, O. Garcia Jr., P. Melnikov, Process Biochemistry. 36 (2000) 441–444.

  13. Pinus brutia The Fifth Eurasian Conference

  14. The Fifth Eurasian Conference 14 14-17 October 2008 • Present work; finely ground Pinus brutia leaf powder for the removal of La and Cefrom aqueous solutions.

  15. Experimental The Fifth Eurasian Conference Collection of the leaves • The dried leaves were used as biosorbent without any chemical treatment to avoid extra expenditure. Washing, deionized water drying, 80°C for 24 h grinding Sieving, 125μm Stored in a dessicator

  16. Experimental The Fifth Eurasian Conference Batch adsorption experiments • 0.1 g of dry biomasswere mixed with 25 mL of metal ion solution. • LaNO3.6H2O and CeNO3.6H2O (Merck) • The mixture was shaken in thermostatically controlled shaker • Filtered (Whatman filter paper no: 44) • The amounts of metal ions adsorbed on biomass were calculated as the difference between initial and final concentration at equilibrium. (mg/g)

  17. Experimental The Fifth Eurasian Conference 17 14-17 October 2008 ICP-OES (Optima 2000 DV, Perkin Elmer, USA)

  18. Adsorption tests The Fifth Eurasian Conference The parameters which affect the La and Ce adsorption were investigated, such as; • pH (2-6), • shaking time (5-480 min), • Initial metal ion concentration (25-300 ppm), • adsorbent concentration(2-30 mg/mL) • Temperature (20-50°C).

  19. Adsorption tests The Fifth Eurasian Conference Effect of initial pH Initial Laand Ce concentrations: 100 ppm Shaking time: 120 min Temperature: 30°C Adsorbent amount: 0.1 g

  20. Adsorption tests The Fifth Eurasian Conference Effect of shaking time Initial La and Ceconcentrations: 100 ppm pH 5 Temperature: 30°C Adsorbent amount: 0.1 g

  21. Adsorption tests The Fifth Eurasian Conference 21 14-17 October 2008 Effect of initial metal concentration pH 5 Shaking time: 30 min for La, 15 min for Ce Temperature: 30°C Adsorbent amount: 0.1 g

  22. Adsorption tests The Fifth Eurasian Conference Effect of temperature Initial La and Ceconcentrations: 25 ppm pH 5 Shaking time: 30 min for La, 15 min for Ce Adsorbent amount: 0.1 g

  23. Thermodynamic considerations The Fifth Eurasian Conference H positive and G negative Endothermic and spontaneous

  24. Adsorption tests The Fifth Eurasian Conference Effect of adsorbent concentration Initial La and Ceconcentrations: 25 ppm pH 5 Shaking time: 30 min for La, 15 min for Ce Temperature: 30°C

  25. Adsorption isotherms The Fifth Eurasian Conference Freundlich Isotherm Langmuir Isotherm q: amount of solute adsorbed per mass unit adsorbent C: equilibrium concentration K and n: Freundlich constants Ce: equilibrium concentration (mg/L), qe: amount absorbed at equilibrium (mg/g) nm:monolayer capacity b: energy of adsorption

  26. Adsorption isotherms Freundlich and Langmiur Constants The Fifth Eurasian Conference

  27. Conclusions The Fifth Eurasian Conference • The initial pH of the aqueous phase strongly affected the uptake of the ions, with the highest capacity achieved at pH 5.0 • The Langmuir and Freundlich adsorption model were used for mathematical description of the removal of the La and Ce(III) ions onto Pinus Brutia leaf powder. • Thermodynamic parameters ΔH°, ΔS° and ΔG° were estimated and these parameters show that adsorption is more favorable at high temperature, process is spontaneous and endothermic. • Adsorption onto Pinus Brutia leaf powders showed a good potential to be an interesting alternative and low-cost method for lanthanum and cerium recovery from solutions.

  28. Thank you very much for your attention… The Fifth Eurasian Conference 28 14-17 October 2008

More Related