Removal of Zn2+ and Cr6+from waste water Samples, using natural Iranian (Aftar) Zeolites

محورهای موضوعی :

S. Peyravi,, ¹ (School of Earth Sciences, Damghan University, Damghan, Iran)
R. Zahiri ² (School of Earth Sciences, Damghan University, Damghan, Iran)
K. Moradi Hersini ³ (School of Earth Sciences, Damghan University, Damghan, Iran)

تاریخ دریافت : 1390/07/06 تاریخ پذیرش : 1397/08/07 تاریخ انتشار : 1390/07/06

کلید واژه: zeolite, chromium, Zinc, Aftar,

چکیده مقاله :

This paper concerns the removal of Zn2+ and Cr6+ ions from waste water using a naturally occurring zeolite from semnan region in Iran. A continuous fixed-column study was carried out by using zeolite as a low-cost adsorbent for the removal of Zn2+ and Cr6+ ions from aqueous solution under the effect of various process parameters such as, grain size and time. The efficiency of removal is higher for Zn than Cr ions. The Zn2+ and Cr6+ ions uptake by zeolite increased with initial ions concentration and column height, but decreased as the flow rate increased. The adsorption capacity reached a maximum at grain size of 0.71mm.

منابع و مأخذ:

1. Barbier F., G. Due and M. Petit-Ramel,
2. Adsorption of lead and cadmium ions
3. from aqueous solution to the
4. montmorilonite/ water interface, Colloid
5. Surface PhysicochemEng Aspect, 166,
6. ââ‚‌“159, 2000.
7. Barer R.M., Zeolites and Clay Minerals as
8. Sorbent and Molecular Sieves, Academic
9. Press, New York,
10. Breck D.W. and J. Chem. Edu. 41, 1964. 67
11. Brigatti M. F., C. Lugli and L. Poppi, Kinetics of
12. heavy metal removal and recovery in
13. sepiolite, Appl. Clay. Sci., 16, 45ââ‚‌“57,
15. Brown P. A., S. A. Gill and S. J. Allen. Metal
16. removal from waste water using peat,
17. Water Res. 34 (16), 3907ââ‚‌“3916,2000.
18. Burns C. A., P. J. Class, I. H. Harding and R. J.
19. Crawford, Adsorption of aqueous heavy
20. metals onto carbonaceous substrate,
21. Colloid Surface PhysicochemEng Aspect,
22. , 63ââ‚‌“68, 1999.
23. Chen D. and A. K. Ray, Removal of toxic metal
24. ions from wastewater by semiconductor
25. photocatalysis, Chem. Eng. Sci., 56,
26. ââ‚‌“1570, 2001.
27. Dayan, A. D. and A. J. Paine, 2001.
28. "Mechanisms of chromium toxicity,
29. carcinogenicity and allergenicity: review
30. of the literature from 1985 to 2000."
31. Human & Experimental Toxicology
32. (9): 439-51.
33. Eftekharnejad. J. Report of Zeolite mines
34. exploration of Semnan province,
35. industrial and mines organization of
36. semnan province, 2004.
37. Evans J. R., W. G. Davids, J. D. MacRae and A.
38. Amirbahman, Kinetic of cadmium uptake
39. by chitosan-based crab shells, Water
40. Res,.36, 3219ââ‚‌“3226, 2002.
41. Faur-Brasquet C., Z. Reddad, K. Yavuz O., Y.
42. Altunkaynak and F. Guzel, Removal of
43. copper, nickel, cobalt and manganese
44. from aqueous solution by kaolinite, Water
45. Res., 37, 948ââ‚‌“952, 2003.
46. Garsia S. A., A. Alastuey and X. Querol, Heavy
47. metal adsorption by different minerals:
48. application to the remediation of polluted
49. soils, Sci. Total. Environ.,242, 179ââ‚‌“188,
51. Kadirvelu and P. Le Cloirec, Modeling the
52. adsorption of metal ions (Cu2+, Ni2+, Pb2+)
53. onto ACCs using surface complexation
54. models, Appl. Surf. Sci. 196 (1ââ‚‌“4), 356ââ‚‌“
55. , 2002.
56. Karabult S., A. Karabahan, A. Denizli and Y.
57. Yurum, Batch removal of copper(II) and
58. zinc(II) from aqueous solution with lowrank
59. Turkish coals, Separ. Purif.Tech.,
60. , 177ââ‚‌“184 ,2000.
61. Kazemian H. and H. Faghihian, Ninth article
62. complex of IrrigationandDrainage Iran
63. National Committee, 1998.
64. IrrigationandDrainage Iran National
65. emission, first edation.
66. Mohan D. and K. P Singh, Single- and multicomponent
67. adsorption of cadmium and
68. zinc using activated carbon derived from
69. bagasse ââ‚‌“ an agricultural waste, Water
70. Res., 36, 2304ââ‚‌“2318, 2002.
71. Pollard S. J. T., G. D. Fowler, C. J. Sollars and R.
72. Perry, Low cost adsorbents for waste and
73. wastewater treatment: A review, Sci.
74. Total. Environ.,116, 31ââ‚‌“52, 1992.
75. Sun T. and K. Seff, Chemical Reviews 94, 1994.