Physicochemical and microbiological characterization of cement kiln dust for potential reuse in wastewater treatment

Salem, Wesam; Sayed, W. F.; Halawy, Samih A.; Elamary, Rokaia B.

doi:10.1016/j.ecoenv.2015.05.012

Cited by 22 publications

(9 citation statements)

References 37 publications

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“…For cadmium, 90% was removed at pH 5.5 and it increased to 99% at pH6.2.For Cobalt, removal increased proportionally with increasing pH from 50% at pH 6 to 90% at pH 8. The obtained results of this work are in agreement with Salem et al, (2015) who found that mixing of sewage water with CKD (10 g/l) completely removed manganese, nickel, lead, zinc and iron (100% removal) after 3 days of treatment. The removal of cadmium and cobalt were proportionally increased with increasing pH up to 8.…”

Section: (Oh) N + Ckd Ckd ( M (Oh) N )supporting

confidence: 91%

“…X-ray diffraction analysis of cement kiln dust showed that the main constituent is calcite (CaCO 3 ), quartz (SiO 2 ) and calcium sulfate (CaSO 4 ). CKD has potential as an amendment for the neutralization of acidity with high adsorption capability for aqueous metals and nutrients removal efficiencies (El-Awady, 1998b;Salem et al, 2015). Adsorption is the most effective and widely used technique for the removal of toxic heavy metals from wastewater as a reliable approach for sewage treatment in developing countries (El-Awady, 1998a;Selvi et al, 2001;El-Awady and Ali, 2012).…”

Section: Introductionmentioning

confidence: 99%

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Utilization of Cement Kiln Dust in Domestic Sewage Sludge Treatment for Safe Disposal and Environmental Protection

El-Awady¹,

2016

Journal of Environmental Science

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Recent years, wastewater treatment plants are producing huge amounts of primary and secondary sewage sludge. On the other hand, large quantities of cement kiln dust (CKD) were produced from cement factories with negative impacts on the environment. CKD is a considerable by-product waste material of the industrial process. At the time being, remarkable advances have been achieved in the management and reuse of CKD. Due to its high alkalinity, huge amounts, negative impact and abundant source; it is considered as noncontrolled source of pollution. Reuse of CKD in presence of waste sludge has high potential as an additional low cost raw material, fertilizer, constructing material, adsorbent and improving sandy soil properties. In this study, CKD was used as chemical coagulant / flocculent sewage sludge and adsorbent for soluble pollutants as well as microbial disinfectants. The optimum operating conditions were adjusted using Jar test experiment and tested sludge was analyzed. Results showed that on addition 8.0 g/l CKD to primary sludge and 7.0 g/l to return activated sludge (RAS) achieved good efficiency for solids separation, BOD5, COD, PO4, and NH4; respectively. Under the effect of high pH value, it was also beneficial in heavy metals immobilization and minimization of metal solubility in the treated sludge matrix. Consequently, metal ions were precipitated as hydroxides. Moreover, all pathogenic and viral species were destructed including total and fecal coliforms.

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Section: (Oh) N + Ckd Ckd ( M (Oh) N )supporting

confidence: 91%

Section: Introductionmentioning

confidence: 99%

Utilization of Cement Kiln Dust in Domestic Sewage Sludge Treatment for Safe Disposal and Environmental Protection

El-Awady¹,

2016

Journal of Environmental Science

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“…Otherwise, cement kiln dust (CKD) is created in the cement manufacturing process as a by-product. Because of its physicochemical properties, CKD has reported as effective in removing heavy metals ions (Salem et al, 2015, El-Refaey, 2016El-Refaey and Mohammad, 2019) and dyes (Magdy and Altaher, 2018).…”

Section: Introductionmentioning

confidence: 99%

Removal of Methylene Blue Dye from Aqueous Solutions by Bentonite and Cement Kiln Dust: Comparative Study of Adsorption Equilibrium, Kinetic, and Thermodynamic

Refaey

2021

Alexandria Science Exchange Journal

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This study compared the methylene blue (MB) removal from aqueous solution by natural bentonite (Bent) and cement kiln dust (CKD). Bentonite and CKD were characterized by X-ray diffraction (XRD), X-ray fluorescence (XRF), Brunauer Emmett Teller (BET) specific surface area, Fourier transform infrared (FTIR), and scanning electron microscopy (SEM). The comparison between bentonite and CKD in the removal of MB dye was investigated in different conditions including initial MB concentration, adsorbent doses, pH, salt concentration, and temperature by batch experiments. Adsorption kinetics results were fitted with fractional power, Elovich, pseudo-first-order, pseudo-second-order, and intraparticle diffusion equations. The pseudo-second-order model was well fitted for experimental results at the different tested initial concentrations (50-300 mgMB/L). Equilibrium adsorption data were evaluated by Freundlich and Langmuir and Temkin models. The experimental results fitted very well by the Langmuir isotherm model. Bentonite exhibited the largest adsorption capacity (3257.33 mg/g) than CKD (2150.54 mg/g). Increasing the temperature from 298K to 323 o K convinced an increase of the adsorption of MB dye by both sorbents and the process was found to be endothermic and spontaneous. The obtained results indicated that both adsorbents are efficient and low-cost adsorbents for effective removal of MB dye with privilege in the efficiency for bentonite and with no cost for CKD.

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“…In Egypt, for instance, ca. one million tons of CKD are discharged annually from cement kilns [9], which contain excessive amounts of alkali compounds, thus making them unsuitable for reuse in the cement making process [5,10]. Consequently, an active research has been urged to find out profitable ways and means of using CKD, not only to avoid its environment and health threats, but also to evolve an added value to the global cement industry.…”

Section: Introductionmentioning

confidence: 99%

A Facil Water Treatment Rendering Cement Kiln Dust Reusable in Clinker Manufacturing

MI¹

2019

Journal of Waste Resources and Recycling

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The present investigation is an attempt to join the forces with the international research endeavor in tackling this important issue. The thrust has been not only the awareness of the obvious environmental, health and economical necessities of the subject, but also the lack of in-depth knowledge about the influence of two basic treatments, namely the heat and water treatments, on the chemical composition and morphology of CKD particles. It is worth noting, in this regard, that influence of water treatment of CKD was previously examined but was focused on the hydration of the lime content into Ca(OH) 2 in order to improve the viability of using

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Physicochemical and microbiological characterization of cement kiln dust for potential reuse in wastewater treatment

Cited by 22 publications

References 37 publications

Utilization of Cement Kiln Dust in Domestic Sewage Sludge Treatment for Safe Disposal and Environmental Protection

Utilization of Cement Kiln Dust in Domestic Sewage Sludge Treatment for Safe Disposal and Environmental Protection

Removal of Methylene Blue Dye from Aqueous Solutions by Bentonite and Cement Kiln Dust: Comparative Study of Adsorption Equilibrium, Kinetic, and Thermodynamic

A Facil Water Treatment Rendering Cement Kiln Dust Reusable in Clinker Manufacturing

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