scholarly journals Use of cement kiln dust to remove copper from simulated wastewater using the Response surface methodology

2020 ◽  
Vol 13 (3) ◽  
pp. 200-206
Author(s):  
Hanan A. Ibraheem ◽  
Husham M.Al. Tameemi

Copper removal from simulated wastewater was achieved using Cement Kiln Dust (CKD) as adsorbent. The effects of contact time, pH, initial copper ion concentration, rotational speed, and Cement Kiln Dust (CKD) amount were studied. The best operating conditions were determined by applying a Response Surface Methodology (RSM). The results showed that the copper concentration has the main effect on the efficiency of copper removal followed by time, shaking rate, dosage of cement kiln dust, and pH. The best operating conditions were found to have a pH value of 8, contact time 90 minutes, shaking rate of 300 rpm, copper ion concentration 20 ppm, and a quantity of CKD equivalent to 35 g / l. Based on this optimum condition, 99 % of the efficiency of copper removal was achieved.

2016 ◽  
Vol 41 (4) ◽  
pp. 593-603 ◽  
Author(s):  
E.G. Al-Sakkari ◽  
S.T. El-Sheltawy ◽  
M.F. Abadir ◽  
N.K. Attia ◽  
G. El-Diwani

2020 ◽  
Vol 38 (6A) ◽  
pp. 879-886
Author(s):  
Ahmed S. Kadhim ◽  
Alaa A. Atiyah ◽  
Shakir A. Salih

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.


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

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