Removal of Heavy Metals by Cement Kiln Dust

1997 ◽  
Vol 59 (4) ◽  
pp. 603-610 ◽  
Author(s):  
M. H. El-Awady ◽  
T. M. Sami
Keyword(s):  
Heavy Metals ◽  
Cement Kiln Dust ◽  
Cement Kiln ◽  
Removal Of Heavy Metals ◽  
Kiln Dust

Equilibrium analysis for heavy metal cation removal using cement kiln dust

2014 ◽  
Vol 70 (6) ◽  
pp. 1011-1018 ◽  
Author(s):  
Mohamed El Zayat ◽  
Sherien Elagroudy ◽  
Salah El Haggar
Keyword(s):  
Heavy Metals ◽  
Heavy Metal ◽  
Metal Removal ◽  
Equilibrium Constants ◽  
Surface Complexation ◽  
Chemical Precipitation ◽  
Equilibrium Analysis ◽  
Cement Kiln Dust ◽  
Cement Kiln ◽  
Kiln Dust

Ion exchange, reverse osmosis, and chemical precipitation have been investigated extensively for heavy metal uptake. However, they are deemed too expensive to meet stringent effluent characteristics. In this study, cement kiln dust (CKD) was examined for the removal of target heavy metals. Adsorption studies in completely mixed batch reactors were used to generate equilibrium pH adsorption edges. Studies showed the ability of CKD to remove the target heavy metals in a pH range below that of precipitation after an equilibrium reaction time of 24 h. A surface titration experiment indicated negative surface charge of the CKD at pH below 10, meaning that electrostatic attraction of the divalent metals can occur below the pH required for precipitation. However, surface complexation was also important due to the substantive metal removal. Accordingly, a surface complexation model approach that utilizes an electrostatic term in the double-layer description was used to estimate equilibrium constants for the protolysis interactions of the CKD surface as well as equilibria between background ions and the sorbent surface. It was concluded that the removal strength of adsorption is in the order: Pb > Cu > Cd. The experiments were also supported by Fourier transform infrared spectroscopy (FTIR).

Properties of Self-Compacting Cementitious Composite Materials Containing Cement Kiln Dust Powder

2020 ◽  
Vol 38 (6A) ◽  
pp. 879-886
Author(s):  
Ahmed S. Kadhim ◽  
Alaa A. Atiyah ◽  
Shakir A. Salih
Keyword(s):  
Composite Materials ◽  
Total Porosity ◽  
Cement Kiln Dust ◽  
Cement Kiln ◽  
Cementitious Composite ◽  
Cement Dust ◽  
Micro Cracks ◽  
Load Carrying ◽  
Sustainable Materials ◽  
Kiln Dust

This paper aims to investigate the influence of utilization micro cement kiln dust as a sustainable materials additive in order to reduce the voids and micro cracks in the cementitious mortar materials which cause a drastic reduction in the load carrying capacity of the element. Its therefore very important to decrease the pores and enhance the mechanical strength of the cementitious composite materials. In this article, the properties of self-compacting mortar containing micro cement dust additive was experimentally assessed. Micro cement dust powder was added to the self-compacting mortar in (1, 2, 3, 4 and 5 %) percentage by weight of cement to be used as cementitious sustainable materials. The experimental results indicated that the modification and enhancement of the workability of fresh mixture and the mechanical strengths of self-compacting mortar were increased as micro cement dust additives increases. Also; the water absorption and total porosity were decreased with increases of micro cement dust powder.

scholarly journals Application of Cement Kiln Dust as Activator of Ground Granulated Blast Slag for Developing A Novel Cold Mix Asphalt

2021 ◽  
Vol 1090 (1) ◽  
pp. 012029
Author(s):  
Ruqayah Al-Khafaji ◽  
Anmar Dulaimi ◽  
Monower Sadique ◽  
Ayat Aljsane
Keyword(s):  
Cement Kiln Dust ◽  
Cement Kiln ◽  
Kiln Dust
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