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. (2009). Study of morphology for geopolymer materials obtained from fly ash. Environmental Engineering and Management Journal, 8, 1021–1027. [11] Harja, M., Barbuta, M., Rusu, L., Munteanu, C., Buema, G., & Doniga, E. (2011a). Simultaneous removal of Astrazone blue and lead onto low cost sorbents based on power plant ash. Environmental Engineering and Management Journal, 10, 341–347. [12] Harja, M., Gurita, A. A., Barbuta, M., & Ciocinta, R. C. (2011b). Zelites from power plant ash for waste water treatment. Lucrari àtiinifice. Seria Agronomie, 54(Supplement), 30

Abstract

Thermal-treated carbons from acorn and cypress cone were prepared and characterized. The uptakes of heavy metal ions (Ag+, Cd2+ and Cr+3) and organics (phenol, methylene blue and sodium dodecylbenzenesulfonate) from aqueous solution have been studied. Effects of activation by HCl and HNO3 acids on the sorption properties of these carbons were investigated by mass titration, sorption isotherms, IRS, SEM and XRS. The models of Langmuir and Freundlich do not represent our sorption data very well. An earlier proposed empirical correlation is applied successfully to carry out a parameter of comparison between the studied carbons. The acidic treatment changes the surface chemical properties of the two thermal-treated carbons lowering their sorption performances. The carbons show good capacities to uptake metals, phenol and methylene blue, but sodium dodecylbenzenesulfonate is removed from its solutions to minor extent. The up-taking properties are found similar to those of two worldwide used commercial grade carbons.

. Journal of Hazardous Materials, 97, 219–243. DOI: 10.1016/s0304-3894(02)00263-7. http://dx.doi.org/10.1016/S0304-3894(02)00263-7 [6] Bailey, S. E., Olin, T. J., Brica, R. M., & Adrian, D. D. (1999). A review of the potentially low-cost sorbents for heavy metals. Water Research, 33, 2469–2479. DOI: 10.1016/s0043-1354(98)00475-8. http://dx.doi.org/10.1016/S0043-1354(98)00475-8 [7] Bakr, H. E. G. M. M. (2010). Diatomite: Its characterization, modifications and applications. Asian Journal of Material Science, 2, 121–136. DOI: 10.3923/ajmskr.2010.121.136. http

matrix for liquid radioactive waste requires the employment of pottery vessels. Therefore, the present study aims to give detailed investigations of the decontamination of radionuclides and toxic elements using pottery containers. These investigations are equally useful to elucidate how far these vessels can be utilized for wa- ter purification through decontamination of toxic and heavy metals. The radionuclide or heavy metal removal capability using pottery pots, as low cost sorbents, has been investigated for both radioactive (203Hg) and stable mercury. The results

Abstract

The presence of dyes in effluents is a major concern due to their adverse effects to many forms of life. Dyes are generally removed by conventional sorbents. This article discusses the use of adsorbents from the waste metal production (low-cost sorbents), red mud (RM) and black nickel mud (BNM), to remove methylene blue solution (MB) under different test conditions, such as time and temperature of sorption and weight of sorbent samples. From the obtained data, we can claim that the highest achieved sorption efficiency was achieved by a RM sorbent at 60 °C after 48 hours of sorption with all three weights of samples (83.01 – 83.72%).

Abstract

Spirulina platensis biomass is widely applied for different technological purposes. The process of lanthanum, chromium, uranium and vanadium accumulation and biosorption by Spirulina platensis biomass from single- and multi-component systems was studied. The influence of multi-component system on the spirulina biomass growth was less pronounced in comparison with the single-component ones. To trace the uptake of metals by spirulina biomass the neutron activation analysis was used. In the experiment on the accumulation the efficiency of studied metal uptake changes in the following order: La(V) > Cr(III) > U(VI) > V(V) (single-metal solutions) and Cr(III) > La(V) > V(V) > U(VI) (multi-metal system). The process of metals biosorption was studied during a two-hour experiment. The highest rate of metal adsorption for single-component systems was observed for lanthanum and chromium. While for the multi-component system the significant increase of vanadium and chromium content in biomass was observed. In biosorption experiments the rate of biosorption and the Kd value were calculated for each metal. Fourier transform infrared spectroscopy was used to identify functional groups responsible for metal binding. The results of the present work show that spirulina biomass can be implemented as a low-cost sorbent for metal removal from industrial wastewater.

. Mater. 154: 451-458. Bailey SE, Olin TJ, Bricka RM, Adrian DD (1999) A review of potentially low-cost sorbents for heavy metals. Water Res. 33: 2469-2479. Crini G (2006) Non-conventional low-cost adsorbents for dye removal: a review. Bioresour. Technol. 97: 1061-1085. Fu F, Wang Q (2011) Removal of heavy metal ions from wastewaters: a review. J. Environ. Manag. 92: 407-418. Gardea-Torresdey JL, Becker-Hapak MK, Hosea JM, Darnall DW (1990) Effect of chemical modification of algal carboxyl groups on metal ion binding. Environ. Sci. Technol. 24: 1372-1378. Holub M

potentially low-cost sorbents for heavy metals. Water research, 33(11), 2469-2479. [7] Moxley, G., Zhu, Z., & Zhang, Y.H.P. (2008). Efficient sugar release by the cellulose solventbased lignocellulose fractionation technology and enzymatic cellulose hydrolysis. Journal of agricultural and food chemistry, 56(17), 7885-7890. [8] Guo, X., Zhang, S., & Shan, X. Q. (2008). Adsorption of metal ions on lignin. Journal of hazardous materials, 151(1), 134-142. [9] Keränen, A., Leiviskä, T., Zinicovscaia, I., Frontasyeva, M. V., Hormi, O., & Tanskanen, J. (2016). Quaternized pine

rice hull and sawdust sorptive characteristics for remove heavy metals from synthetic solutions and wastewater. J. Hazard. Mater. 154: 451-458. Babel S, Kurniawan TA (2003) Low-cost adsorbents for heavy metals uptake from contaminated water: A review. J. Hazard. Mater. 97: 219-243. Bailey SE, Olin T J, Bricka RM, Adrian DD (1999) A review of potentially low-cost sorbents for heavy metals. Water Res. 33: 2469-2479. Celik A, Demirbaş A (2005) Removal of heavy metal ions from aqueous solutions via adsorption onto modified lignin from pulping wastes. Energ. Source. 27

, 366 (2–3), pp. 409 – 426. 4. BAILEY, S. E., OLIN, T. J., BRICKA, R. M. and ADRIAN, D.D. 1999. A review of potentially low-cost sorbents for heavy metals. Water Rescue, 33, pp. 2469–2479. 5. WANG, S. and PENG, Y. 2010. Natural zeolites as effective adsorbents in water and wastewater treatment. Chemical Engineering Journal , 156 (1) p. 11 – 24. 6. BARATA-RODRIGUESA, P. M, MAYS, T.J. and MOGGRIDGE, G. D. 2003. Structured carbon adsorbents from clay, zeolite and mesoporous aluminosilicate templates. Carbon , 41 (12), pp. 2231 – 2246. 7. SMIIKLAS, I., DIMOVI, S