حذف نیکل و کادمیم از محلول‌های آبی توسط نانو ذرات مغناطیسی اصلاح شده

نوع مقاله : مقاله پژوهشی

نویسندگان

1 دانشیار گروه شیمی، دانشکده علوم پایه، دانشگاه سمنان

2 دانشجوی کارشناسی ارشد شیمی تجزیه، دانشکده علوم پایه، دانشگاه سمنان

چکیده

در این پژوهش از جاذب نانو ذرات مغناطیسی اصلاح شده توسط خاکستر برگ زیتون برای حذف فلزات سنگین نیکل و کادمیم از محلول‏های آبی استفاده شد. تاثیر پارامترهای موثر بر فرایند حذف شامل pH،زمان تماس، مقدار جاذب و دما مورد بررسی قرار گرفت. مطالعات ساختاری نانو ذرات مغناطیسی اصلاح شده توسط خاکستر برگ زیتون با میکروسکوپ الکترونی روبشی، میکروسکوپ الکترونی عبوری و طیف سنجی مادون قرمز انجام شد. با بررسی ایزوترم‏های جذب، بهترین انطباق نتایج تجربی با ایزوترم لانگمیر به‌دست آمد. به‌علاوه مطالعات سینتیکی انجام شده نشان دهنده بهترین تطبیق داده‏های تجربی با سینتیک شبه درجه دوم بود. بر اساس مطالعات ترمودینامیکی، فرایند از نوع گرمازا و به‌صورت خود به خودی بوده و مقادیر آنتالپی، منفی به‌دست آمد.

کلیدواژه‌ها

موضوعات


عنوان مقاله [English]

Removal of Nickel and Cadmium from Aqueous Solution by Modified Magnetic Nanoparticles

نویسندگان [English]

  • Hassan Mousavi 1
  • Zahra Lotfi 2
چکیده [English]

Magnetic nanoparticles modified by olive leaf ash were used in this study for the removal of heavy metal ions from aqueous solutions. The equilibrium adsorption level was determined as a function of solution pH, temperature, contact time, initial adsorbate concentration, and adsorbent dosage. Adsorption isotherms of heavy metal ions on adsorbents were determined and correlated with common isotherm equations such as Langmuir, Freundlich, and Tempkin models. The apparent characters and physical chemistry performance of the magnetic nanoparticles modified by olive leaf ash were investigated by scanning electron microscopy (SEM), transmition electron microscopy (TEM), and FT-IR. Results showed that the Langmuir isotherm model was fitted well with adsorption data. Kinetic studies were also carried out using various kinetic models such as Pseudo-first order, Pseudo-second order, Elovich and Intra particle diffusion model. The Pseudo-second order kinetic model was fitted very well with the experimental data. Based on thermodynamic studies, this process was found to be both endothermic and spontaneous and the enthalpy and entropy were found to be negative.

کلیدواژه‌ها [English]

  • nickel
  • Cadmium
  • Magnetic nanoparticle
  • Isotherm
  • Kinetic
  • Thermodynamic
1. Volesky, B. (2001). “Detoxification of metal-bearing effluents: Biosorption for the next century.” Hydrometallurgy, 59, 203-216.
2. Yadanaparthi, S.K. R., Graybill, D., and Wandruszka, R. V. (2009). “Adsorbents for the removal of arsenic, cadmium, and lead from contaminated waters.” J. Hazard. Mater., 171, 1-15.
3. Ngomsik, A. R., Bee, A., Siaugue, J. M., Talbot, D., Cabuil, V., and Cote, G. (2009). “Co(II) removal by magnetic alginate beads containing Cyanex 272.” J. Hazard. Mater, 166, 1043-1049.
4. Egila, J.N., and Okorie, E. O. (2002). Influence of pH on the adsorption of trace metals on ecological and agricultural adsorbents.” J. Chem. Soc. Niger., 27, 95-98.
5. Eccles, H. (1995). “Removal of heavy metals from effluent streams-why select a biological process?” Int. Biodeterior. Biodegrad, 35, 5-16.
6. Asadi Habib, M., Alavi Moghaddam, S.M.R., Arami, M., and Hashemi, S.H. (2012). “Optimizotion of the electrocoagulation process for remoal of Cr(VI) using taguchi meghod.” J. of Water and Wastewater, 80, 2-8 (In Persian)
7. Anwar, J., Shafique, U., Salman, M., Zaman, W., Anwar, S., and Anzano, J. (2009). “Removal of chromium (III) by using coal as adsorbent.” J. Hazard. Mater., 171, 797-801.
8. Afkhami, A., and Conway, B.E. (2002). “Investigation of removal of Cr(VI), Mo(VI), W(VI), V(IV), and V(V) oxy-ions from industrial waste-waters by adsorption and electrosorption at high-area carboncloth.” J. Colloid Interface, Sci., 251, 248-255.
9. Korngold, E., Belfer, S., and Urtizberea, C. (1996). “Removal of heavy metals from tap waterby a cation exchanger.” Desalination, 104, 197-201.
10. Lacour, S., Bollinger, J. C., Serpaud, B., Chantron, P., and Arcos, R. (2001). “Removal of heavy metals in industrial wastewaters by ion-exchanger grafted textiles.” Anal. Chim. Acta, 428, 121-132.
11. Uzun, I., and Guzel, F. (2000). “Adsorption of some heavy metal ions from aqueous solution by activated carbon and comparison of percent adsorption results of activated carbon with those of some other adsorbents.” Turk. J. Chem., 24, 291-297.
12. Shamohammadi, Z. (2010). “Lead removal from aquous solution using low-cost adsorbent.” J. of Water and Wastewater, 75, 45-50. (In Persian)
13. Larson, V. J., and Schierup, H. H. (1981) “The use of straw for removal of metals from wastewater.” J. Environ. Qual., 10, 188-193.
14. Saeedi, M., Jamshidi, A., Abessi, O., and Bayat, J. (2009). “Removal of dissolved cadmium by adsorption onto walnut and almond shell charcoal : Comparison with granular activated carbon (GAC).” J. of Water and Wastewater, 70, 16-22. (In Persian)
15. Ajmal, M. (2003). “Adsorption studies on rice husk: Removal and recovery of Cd(II) from wastewater.” Bioresour. Technol., 86, 147-149.
16. Vaughan, T., Seo, C. W., and Marshall, W. E. (2001). “Removal of selected metal ions from aqueous solution using modified corncobs.” Bioresour. Technol., 78,133-139.
17. Afkhami, A., Saber-Tehrani, M., and Bagheri, H. (2010). “Simultaneous removal of heavy metal ions in wastewater samples using nano-alumina modified with 2,4- dinitrophenylhydrazine.” J. Hazard. Mater, 181, 836-844.
18. Naiya, T. K., Bhattacharya, A. K., and Das, S. K., (2009).“Adsorption of Cd(II) and Pb(II)from aqueous solutions on activated alumina.” J. Colloid Interface Sci., 333, 14-26.
19. El-Shafey, E., Cox, M., Pichugin, A. A., and Appleton, Q. (2002). “Application of a carbon sorbent for the removal of cadmium and other heavy metal ions from aqueous solution.” J. Chem. Technol. Biotechnol, 77, 429-436.
20. Pan, B.C., Zhang, Q. R., Zhang, W. M., Pana, P. J., Dua, W., Lv, L., Zhanga, Q. J., Xua, Z. W., and Zhang, Q. X. (2007). “Highly effective removal of heavy metals by polymer-based Zirconiumphosphate: A case study of lead ion.” J. Colloid Interface Sci. 310, 99-105.
21. Shamohammadi, Sh. (2012). “Study of kinetics of copper in aquenous by sawdust adsorbent.” J. of Water and Wastewater, 82, 127-133. (In Persian)
22. Zou, X., Zhu, G., Guo, H., Jing, X., Xu, D., and Qiu, S. (2009) “Effective heavy metal removal through porous stainless-steel-net supported low siliceous zeolite ZSM-5 membrane.” Microporous  and Mesoporous Materials, 124, 70-75.
23. Pitcher, S. K., Sladea, R. C. T., and Ward, N. I. (2004) “Heavy metal removal from motorway storm  water using zeolites.” Sci. Total Environ, 335, 161-166.
24.Wang, J. Y., Huang, X. J., Kao, J. C. M., and Stabnikova, O. (2006). “Removal of heavy metals from kaolin using an upward electrokinetic soil remedial (UESR) technology.” J. Hazard.Mater., 136, 532-541.
25.Dong, L., Zhu, Z., Ma, H., Qiu, Y., and Zhao, J. (2010). “Simultaneous adsorption of lead and cadmium on MnO2-loaded resin.” J. Environ. Sci., 22 (2), 225-229.
26.Rathinam, A., Maharshi, B., Janardhanan, S.K., Jonnalagadda, R.R., and Nair, B.U. (2010). “Biosorption of cadmium metal ion from simulated wastewaters using Hypneavalentiae biomass: A kinetic and thermodynamic study.” Bioresource Technol., 101 (5), 1466-1470.