Uçucu Külün Geotekstil Tüp İle Susuzlaştırma Performansının Değerlendirilmesi

Yıl 2022, Cilt: 9 Sayı: 2, 898 - 911, 31.05.2022

Ümit Karadoğan

https://doi.org/10.31202/ecjse.1031842

Öz

Bu çalışmada, Türkiye’de bir termik santralden alınan uçucu külün geotekstil ve poliakrilamid kullanılarak susuzlaştırma performansı araştırılmıştır. Bu amaçla, susuzlaştırma işleminde kullanılan bir geotekstil ve 10 adet farklı yük ve moleküler ağırlığa sahip poliakrilamid kullanılmıştır. İlk olarak uçucu külün kimyasal analizi yapılmış ve uçucu külün F tipi olduğu anlaşılmıştır. Jar deneyinde A4 anyonik poliakrilamidin 20ppm dozajının en etkili sonucu verdiği görünmüştür. A4 poliakrilamid kullanılarak filtre deneyleri yapılarak geotekstil ve poliakrilamidin susuzlaştırma performansı araştırılmıştır. Filtrasyon verimliliği ve susuzlaştırma verimliliği sırasıyla %84 ve %230 olarak bulunmuştur. Susuzlaştırma işlemi sonrasında oluşan katı ve sıvı fazların içerisindeki poliakrilamid varlığının araştırılması için Fourier-Dönüşümlü Infrared Spektroskopi (FTIR) analizi yapılmıştır. Son olarak katkılı ve katkısız filtre keklerinin morfolojik yapısının incelenmesi için tarama elektron mikroskobu ile görüntüleme yapılmıştır. Sonuç olarak, bu yöntemin uçucu külün susuzlaştırılmasında çevresel ve uygulama açısından uygun bir yöntem olduğu anlaşılmıştır.

Anahtar Kelimeler

Uçucu kül, Susuzlaştırma, Geotekstil, Poliakrilamid, FTIR

Evaluation of Fly Ash Dewatering Performance with Geotextile Tube

Öz

In this study, the dewatering performance of fly ash taken from a thermal power plant in Turkey was investigated by using geotextile and polyacrylamide. For this purpose, a geotextile used in the dewatering process and 10 polyacrylamides with different charges and molecular weights were used. Firstly, chemical analysis of fly ash was made and it was understood that fly ash was type F. In the Jar test, 20ppm dosage of A4 anionic polyacrylamide appeared to give the most effective result. The dewatering performance of geotextile and polyacrylamide was investigated by performing filter tests using A4 polyacrylamide. Filtration efficiency and dewatering efficiency were found to be 84% and 230%, respectively. Fourier-Transformed Infrared Spectroscopy (FTIR) analysis was performed to investigate the presence of polyacrylamide in the solid and liquid phases formed after the dewatering process. Finally, scanning electron microscopy was used to examine the morphological structure of the filter cakes with and without polyacrylamide. As a result, it has been understood that this method is a suitable method for the dewatering of fly ash in terms of environmental and application.

Anahtar Kelimeler

Fly-ash, Dewatering, Geotextile, Polyacrylamide, FTIR

Kaynakça

• [1]. IEA. Power Generation in the New Policies Scenario, 2000–2040; IEA: Paris, France; Available online: https://www.iea.org/data-andstatistics/ charts/power-generation-in-the-new-policies-scenario-2000-2040 (accessed on 6 April 2021).
• [2]. Danilov, A.S., Pashkevich, M.A., Petrova, T.A., Environmental integrated monitoring system at reclamation of large open-cast coal mine, Innovation-Based Development of the Mineral Resources Sector: Challenges and Prospects. In Proceedings of the 11th Conference of the Russian-German Raw Materials, St. Petersburg, Russia, 7 November 2019; pp. 189–194.
• [3]. Yao, Z.T., Sarker, J.H., Tang, J.T., Ge, L.Q, Xia, M.S., and Xİ, Y.Q., A comprehensive review on the applications of coal fly ash, Earth-Science Reviews, 2015, 141,105-121.
• [4]. Sridharan A, Prakash K., Coal ash utilization and sustainable waste management. In: The first US-India workshop on global environmental engineering challenges, New Delhi, 2010, 1–5.
• [5]. Blissett, R., Rowson, N., The processing of pulverised fuel ash. Proceedings of 15th Conference on Environment and Mineral Processing, June 8–10, 2011, Ostrava, Czech Republic.
• [6]. Izquierdo, M., Querol, X., Leaching behavior of elements from coal combustion fly ash: an overview, Int. J. Coal Geol., 2012, 94, 54–66.
• [7]. Anjani R.K. Gollakota, Vikranth Volli, Chi-Min Shu, Progressive utilisation prospects of coal fly ash: a review, Sci. Total Environ, 2019, 672, 951–989. [8]. Lior, N., Sustainable energy development: the present (2009) situation and possible paths to the future, Energy, 2010, 35, 3976–3994. [9]. Temimi, M., Camps, J.P., Laquerbe, M., Valorization of fly ash in the cold stabilization of clay materials, Resour. Conserv. Recycl., 1995, 15, 219–234.
• [10]. Ilic, M., Cheeseman, C., Sollars, C., Knight, J., Mineralogy and microstructure of sintered lignite coal fly ash, Fuel, 2003, 82, 331–336.
• [11]. Thomas, T., Optimizing the Use of Fly Ash in Concrete, ortland Cement Association, 2007, Vol. 5420, P, Skokie, IL.
• [12]. Loya, M.I.M., Rawani,A.M., A review: promising applications for utilization of fly ash, Int. J. Adv. Technol. Eng. Sci., 2014, 2, 143–149.
• [13]. Takada, T., Hashimoto, I., Tsutsumi, K., Shibata, Y., Yamamuro, S., Kamada, T., Inoue, K., Tsuzura, K., Yoshida, K., Utilization of coal ash from fluidized-bed combustion boilers as road base material, Resour. Conserv. Recycl., 1995, 14 (2),69–77.
• [14]. Kolias, S., Kasselouri-Rigopoulou, V. A., Karahalios, Stabilisation of clayey soils with high calcium fly ash and cement, Cem. Concr. Compos., 2005, 27 (2) 301–313.
• [15]. Wang, S., Wu, H., Environmental-benign utilisation of fly ash as low-cost adsorbents, J. Hazard. Mater., 2006, 136 (3), 482–501.
• [16]. Cokca, E., Yilmaz, Z., Use of rubber and bentonite added fly ash as a liner material, Waste Manag., 2004, 24 (2), 153–164.