پیوندهای مفید
اخبار و اعلانات
آمار
| تعداد نشریات | 158 |
| تعداد شماره‌ها | 6,225 |
| تعداد مقالات | 67,685 |
| تعداد مشاهده مقاله | 114,949,183 |
| تعداد دریافت فایل اصل مقاله | 89,621,095 |
بررسی تاثیرpH و قدرت یونی بر رفتار جذب کادمیوم توسط برخی ازجاذب های آلی | ||
| تحقیقات آب و خاک ایران | ||
| مقاله 14، دوره 46، شماره 1، فروردین 1394، صفحه 133-140 اصل مقاله (637.84 K) | ||
| نوع مقاله: مقاله پژوهشی | ||
| شناسه دیجیتال (DOI): 10.22059/ijswr.2015.54302 | ||
| نویسندگان | ||
| ابراهیم سپهر* 1؛ امیر توسن2 | ||
| 1دانشیار گروه علوم خاک دانشکدة کشاورزی دانشگاه ارومیه | ||
| 2دانشجوی کارشناسی ارشد علوم خاک دانشگاه ارومیه | ||
| چکیده | ||
| به منظور بررسی تأثیر pH و قدرت یونی بر رفتار جذب کادمیوم توسط جاذب‌های آلی، آزمایشی به صورت سیستم بسته با غلظت اولیة کادمیوم 0 تا 200 میلی‌گرم در لیتر با دو سطح pH 4 و 8 و دو قدرت یونی 03/0 و 1/0 مولار روی ساقة آفتابگردان و بقایای هرس سیب انجام شد. داده‌های آزمایشی با مدل‌های جذب لانگمویر، فروندلیچ، و تمکین برازش داده شدند. نتایج نشان داد pHو قدرت یونی اثری قابل توجه بر جذب کادمیوم دارند. حداکثر جذب تک‌لایه‌ای (qmax) و KL (انرژی جذب) در هر دو جاذب با افزایش pH افزایش یافت. ضرایب معادلة فروندلیچ ( KFوn ) و تمکین (KT و A) نیز روندی مشابه نشان دادند. اما، با افزایش قدرت یونی از 03/0 به 1/0 مولار، پارامترهای جذب کاهش یافتند؛ به گونه‌ای که در ساقة آفتابگردان به طور میانگین qmax از8550 به 8150 میلی‌گرم بر کیلوگرم و KL از 14/0 به 08/0 لیتر بر میلی‌گرم و در بقایای سیب qmax از 7550 به 7300 میلی‌گرم بر کیلوگرم و KL از 09/0 به 06/0 لیتر بر میلی‌گرم کاهش یافت. | ||
| کلیدواژه‌ها | ||
| ایزوترم‌های جذب؛ جاذب‌های آلی؛ قدرت یونی؛ کادمیوم؛ pH | ||
| عنوان مقاله [English] | ||
| Influence of pH and Ionic Strength on Cadmium Sorption by Some Biosorbents | ||
| نویسندگان [English] | ||
| Ebrahim Sepehr1؛ Amir Tosan2 | ||
| 1Assistant Professor, Faculty of Agriculture, University of Urmia | ||
| 2Former Graduate Student, Faculty of Agriculture, University of Urmia | ||
| چکیده [English] | ||
| To study the effect of pH and ionic strength on the sorption behavior of cadmium by biosorbents, a batch experiment was conducted with various initial concentrations of Cd2+ (0 – 200 mg.L-1) with two biosorbents (sunflower stalks and apple pruning residues) in two pH (4, 8) levels and two ionic strengths (0.1 and 0.03 M). Sorption data were fitted to Langmuir, Temkin and Freundlich Equations. Results showed that both pH and ionic strength (IS) had significantly affected Cd sorption. Langmuir maximum mono layer adsorption (qmax) and binding energy value (KL) increased with increasing pH by two biosorbents. Sorption coefficients of Freundlich (KF, n) and Temkin (KT , A) indicated similar trends as well. But by increase in IS (from 0.03 to 0.1 M) all the sorption parameters decreased significantly. As for the case of sunflower stalks; with increase in ionic strength, qmax on the average, decreased from 8505 to 8150 mg/kg and KL from 0.14 to 0.08 L/mg; and as for apple pruning residues, qmax decreased from 7550 to 7300 mg/kg and KL from 0.09 to 0.06 L/mg, respectively. | ||
| کلیدواژه‌ها [English] | ||
| Cadmium, Ionic strength, pH, biosorbents, Adsorption isotherm | ||
| مراجع | ||
|
Abdel-Ghani, N. T., Hefny, M., and El-Chaghaby, G. A. F. (2007). Removal of lead from aqueous solution using low cost abundantly available adsorbents, Internationaljournal of Environment Science and Technology, 4, 67-73.
Abia, A. A. and Asuquo, E. D. (2006). Lead (II) and nickel (II) adsorption kinetics from aqueous solutions using chemically modified and unmodified agricultural adsorbents, African Journal of Biotechnology, 5, 1475-1482.
Ajmal, M., Rao, R. A. K., Ahmad, R., and Ahmad, J. (2000). Adsorption studies on Citrus reticulate, removal and recovery of Ni(II) from electroplating wastewater, Journal of Hazardous Materials, 86, 117–131.
Aki, M. and Nida, M. (2011). Kinetics and Thermodynamics of Cd(II) biosorption onto loquat (Eriobotrya japonica) leaves. Journal of Saudi Chemistry Society, Doil, 10.1016.
Alvarez-Ayuso, E. and Garcia-Sanchez, A. (2007). Removal of cadmium from aqueous solution by palygorokite Journal of Hazardous Material, 147, 594-600.
De Zuane, J. (1990). Handbook of Drinking Water Quality Standards and Controls Van Nostrand Reinhold, New York, 64–69.
Eckenfelder, W. W. (1989). Industrial Water Pollution Control, seconded., McGraw Hill, New York, 104.
Edris, G., Alhamed, Y., and Alzahrani, A. (2012).Cadmium and lead biosorption by chorella vulgaris, Sixteenth International Water Technology Conference, IWCT.
El-Sayed, G. O., Dessouki, H. A., Ibrahim, S. S. (2010). Biosorption of Ni(II) and Cd(II) ions from aqueous solution onto rice straw, Chemical Science Journal, CSJ, 9, 1-11.
Jamali, A. H., Mahavi, A. H., and Nazmara, S. (2009). Removal of cadmium from aqueous solution by hazel nut shell. World applied science journal, 5, 16-20.
Ho, Y. S. and Ofomaja, A. E. (2006). Biosorption thermodynamics of cadmium on coconutcopra meal as biosorbent, Biochemical Engineering Journal, 30, 117–123.
Kannan, N. and Veemaraj, T. (2010). Detoxification of toxic metal ions by sorption onto activated carbon from Hevea brasililiensis bark.Global NEST journal, 2(12), 197-205.
Krishnan, K. A. and Anirudhan, T. S. (2003). Removal of cadmium(II) from aqueous solutions by steam-activated sulphurised carbon prepared from sugar-cane bagasse pith, Kinetics and equilibrium studies. Water South Africa, 29, 147-156.
Kumar, U. (2006). The use of agricultural products and by products has been widely investigated as a replacement for current costly methods of removing heavy metals from water and wastewater, Scientific Research and Essay, 1, 33-37.
Lee, S. H., Jung, C. H., Chung, H., Lee, M. Y., and Yang, J. W. (1998). Removal of heavy metals from aqueous solution by apple residues, Process Biochemical, 33, 205–211.
Liu, A. and Richard, G. (1999). Modeling adsorption of copper, cadmium and lead on purified humic acid. American Chemical Society, 16, 3902-3909.
Lodeiro, P., Cordero, B., Grille, Z., Herrero, R., and Sastre de Vicente, M. E. (2004). Physicochemical studies of Cd(II). Biosorption by the invasive algae in Europe. Sargassummuticum. Biotechnol .Bioeng, 88, 237-247.
Mataka, L. M., Sajidu, S. M. I., Masamba, W. R. L., and Mwatseteza, J. F. (2010). Cadmium sorption by Moringa stenopetala and Moringa oleifera seed powders:Batch, time, temperature, pH and adsorption isotherm studies. International Journal of Water Resources and environmental Engineering, 23, 50-59.
McBride, M. B., Fraser, A. R., and Mc Hardy, W. J. (1984). Cu2+ interaction with microcrystalline gibbsite: evidence for oriented chemisorbed copper ions. Clays Minerals, 32, 12-18.
Norton, L., Baskaran, K., and McKenzie, T. (2004). Biosorption of zinc from aqueous solutions using biosolids, Advanced Environmental, 8, 629–635.
Nuhoglu, Y. and Oguz, E. (2003). Removal of copper(II) from aqueous solutions by biosorption on the cone biomass of Thujaorientalis, Process Biochemical, 37, 1627–1631.
Rao, M. M., Ramesh, A., Rao, G. P. C., and Seshaiah, K. (2006). Removal of copper and cadmium from the aqueous solutions by activated carbon derived from Ceibapentandra hulls. journal of hazardous material, B129, 123–129.
Shin, E. W., Karthikeyan, K. G., and Tshabalala, M. A. (2007). Adsorption mechanism of cadmium on juniper bark and wood, Bioresource Technology, 98, 588–594.
Sanchez, A. G., Ayuso, E. A., and De Blas, O. J. (1999). Sorption of heavy metals from industrial waste water by low-cost mineral silicates.Clay Minerals, 34, 469-477.
Volesky, B., Holan, Z. R. Biosorption of heavy metals. (1995). Biotechnol Progress, 11, 235-250
Yavuz, O., Guzel, R., Aydin, F., Tegin, I., and Ziyadanogullari, R. (2007). Removal of cadmium and lead from aqueous solution by calcite, PolishJournalEnvironmental Studies, 16 (3): 467–471.
Yu, Q. and Kaewsarn, P. (1999). A model for pH dependent equilibrium of heavy metal biosorption.Korean journal of chemical engineering. 16(6): 753-757. | ||
|
آمار تعداد مشاهده مقاله: 1,835 تعداد دریافت فایل اصل مقاله: 1,783 |
||