الملخص
Uptake of Cd(II) ions by natural phillipsite tuff was investigated both in shake-flask and fixed-bed columns. Equilibrium uptake, qe, was found to best fit Langmuir adsorption isotherm with a maximum value of 25.78 mg/g. Percent removal of Cd ions was close to 100% from initial metal ion concentrations in the range 50 - 75 mg/L at 5.0 g zeolite/L. Also, qe was found to vary exponentially with zeolite dose. Break points as high as 350 minutes were obtained from bed treatment at favorable conditions of a low solution flow rate and high bed depth. In batch experiments, equilibrium pH increased to < 8.0 excluding chemical precipitation as part of the removal while in fixed-beds the final pH exceeded 9.0. It is suggested that a sieve action of zeolite porous structure plays a role as an uptake mechanism in addition to the ion exchange.
الكلمات المفتاحية
الموضوع
بيانات النشر
- المعرّف الرقمي
- 10.24200/tjer.vol6iss2pp1-11
- المجلة
- المجلة العُمانية للبحوث الهندسية, 6(2), 1
- الناشر
- جامعة السلطان قابوس
- وصول مفتوح
- وصول مفتوح ذهبي
- الترخيص
- CC BY 4.0
اقتبس هذه المقالة
APA 7
LMarashdeh, L. M., & Al-Haj-Ali, A. M. (2009). Uptake of Cd(II) Using Natural Zeolite: Batch and Continuous Fixed-Bed Studies. The Journal of Engineering Research, 6(2), 1. https://doi.org/10.24200/tjer.vol6iss2pp1-11
MLA 9
LMarashdeh, Luna M., and Ahmad M. Al-Haj-Ali. "Uptake of Cd(II) Using Natural Zeolite: Batch and Continuous Fixed-Bed Studies." The Journal of Engineering Research, vol. 6, no. 2, 2009, pp. 1. https://doi.org/10.24200/tjer.vol6iss2pp1-11.
شيكاغو (المؤلف–التاريخ)
LMarashdeh, Luna M., and Ahmad M. Al-Haj-Ali. 2009. "Uptake of Cd(II) Using Natural Zeolite: Batch and Continuous Fixed-Bed Studies." The Journal of Engineering Research 6 (2): 1. https://doi.org/10.24200/tjer.vol6iss2pp1-11.
هارفارد
LMarashdeh, L. M. and Al-Haj-Ali, A. M. (2009) 'Uptake of Cd(II) Using Natural Zeolite: Batch and Continuous Fixed-Bed Studies', The Journal of Engineering Research, 6(2), pp. 1. doi:10.24200/tjer.vol6iss2pp1-11.
فانكوفر
LMarashdeh LM, Al-Haj-Ali AM. Uptake of Cd(II) Using Natural Zeolite: Batch and Continuous Fixed-Bed Studies. The Journal of Engineering Research. 2009;6(2):1. doi:10.24200/tjer.vol6iss2pp1-11
IEEE
L. M. LMarashdeh, and A. M. Al-Haj-Ali, "Uptake of Cd(II) Using Natural Zeolite: Batch and Continuous Fixed-Bed Studies," The Journal of Engineering Research, vol. 6, no. 2, pp. 1, 2009, doi: 10.24200/tjer.vol6iss2pp1-11.