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Evaluation of kinetics and adsorption isotherms for the Elimination of Pb(II) from aqueous solutions using Aloe barbadensis Miller Leaf Powder | ||
| Pollution | ||
| مقاله 5، دوره 1، شماره 4، دی 2015، صفحه 403-415 اصل مقاله (1.04 M) | ||
| نوع مقاله: Original Research Paper | ||
| شناسه دیجیتال (DOI): 10.7508/pj.2015.04.005 | ||
| نویسندگان | ||
| R Malik* 1؛ Suman Lata1؛ Sushila Singhal2 | ||
| 1Department of Chemistry, Deenbandhu Chhotu Ram University of Science & Technology, Murthal, Haryana, India | ||
| 2Department of Chemistry, Deshbandhu College, Delhi University, Delhi, India. | ||
| چکیده | ||
| An adsorbent was developed from matured leaves of the Aloe barbadensis miller plant for removing Pb(II) from aqueous solutions. Adsorption was carried out in a batch process with several different concentrations of Pb(II) by varying amount of adsorbent, pH, agitation time and temperature. The uptake of the metal was initially very fast, but gradually slowed down indicating penetration into the interior of the adsorbent particles. The experimental data closely followed both Langmuir and Freundlich isotherms. A small amount of the adsorbent (1 g/50ml) could remove as much as 86% of Pb(II) in 35 min from a solution of concentration 0.3 mg/50ml at 25°C. The adsorption continuously increased in the pH range of 2.0–5.0, beyond which the adsorption could decrease up to pH 7.0 when the adsorption could not be carried out due to precipitation of the metal. The adsorption was exothermic at ambient temperature and computation of the parameters, ΔH, ΔS and ΔG, which indicated the interactions to be thermodynamically favorable. | ||
| کلیدواژه‌ها | ||
| Adsorption؛ Aloe barbadensis miller؛ aqueous solutions؛ Heavy metals | ||
| مراجع | ||
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Ajmal, Mohamad A., Yousuf, R., and Ahmad, A. (1998). Adsorption behaviour of Cadmium, Zinc, Nickel and Lead from aqueous solutions by Mangifera Indica seed shell, Indian Journal of Environmental Health, , 40 (1): 1-5. Beckford, M.M., and Badrie, N. (2000). Consumer Acceptance of tropical wines from Aloe Vera (Aloe barbadensis) and cashew apples (Anacardium occidentale L.) in the british virgin islands. Foodservice. Res. Int., 12:185-196. Bhattacharyya, K.G., and Sharma, A. (2004). Adsorption of Pb(II) from aqueous solution by Azadirachta indica(Neem) leaf powder, Journal of Hazardous Materials B113 97–109. Forgacs, E., Cserhati, T., and Oros, G. (2004). Removal of synthetic dyes from wastewaters: a review, Environ. Int., 30 953–971. Goel, K., Kadirvelu, Rajagopal, C. and Garg, V.K. (2005).”Removal of lead (II) by adsorption using treated granular activated carbon: batch and column studies,” Journal of Hazardous Materials, vol. 125, no. 1–3, pp. 211–22. Gosset, J.L., and Traneart, D.R. (1986). Therenot, Batch metal removal by peat: Kinetics and thermodynamics. Wat. Res. 20, 21-26. Gupta, V. K., Gupta, M., and Sharma, S. (2001). Process Development for the Removal of Lead and Chromium from Aqueous Solution Using Red Mud – An Aluminum Industry, Waste, Water Res., 35(5), 1125-1134. Homagai, P.L., Bashyal, D., Poudyal, H., and Ghimire, K.N. (2009). Studies on Functionalization of Apple Waste for Heavy Metal Treatment,Central Department of Chemistry, Tribhuvan University, Kirtipur, Kathmandu, Nepal; Nepal Journal of Science and Technology 10 135-139. Kumar R., Singh N., and. Kumar N. (2011). Biosorption of Lead and Mercury by using four Indigenous fungal species, Indian J. of Environmental Protection, 31(4): 327-331. Langmead, L., Makins, R.J., and Rampton, D.S. (2004). Anti-inflammatory effects of Aloe vera gel in human colorectal mucosa in vitro. Alimentary Pharmacology and Therapeutics.; 19: 521-527. Mittal, A., Krishnan, L., and Gupta, V.K. (2005). Use of waste materials—bottom ash and de-oiled soya, as potential adsorbents for the removal of amaranth from aqueous solutions, J. Hazard. Mater. 117 171–178. Rao, M., Parwate A.V., and Bhole A.G. (2003). Heavy metals Removal by Adsorption using Bagasse and Modification to Helfferich Model, J. Environ. Pollu. Control. Journal, 6(4): 6-13. Sag, Y., Ozer, D., and Kutsal, T. (1995). A comparative study of the biosorption of lead (II) ions to Z. ramigera and R. arrhizus, Process Biochem. 30 169–174. Srinivasan, K., and Ramadevi, A. (2005). Removal of lead in aqueous medium by tamarind nut carbon, Indian Journal of Environmental Protection. 25 (5): 421-428. Upatham, E.S, Boonyapookana, B., Kriatracjie, M., Pokethitiyook, P., and Parkpoomkamol, K. (2002). Biosorption of cadmium and chromium in duck weed Wolffia globosa. Inter. J. Phyto. 4(2), 73-86 Yang, C.L., and McGarrahan, J. (2005). Electrochemical coagulation for textile effluent decolorization, J. Hazard. Mater. 127 (1/3) 40–47. | ||
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