A conference publication titled ‘Purification Of Automobile Wastewater Using Fly Ash-Clay Composite’, authored by Miss Mihiri Dasanayake, Messrs. Sajith Anushan, Chamath Karunarathna, and Prof. Padma Amarasinghe of the Department of Chemical and Process Engineering of University of Moratuwa was presented at the 5th International conference on recent advancements in Interdisciplinary research 2020 (5th ICRAIR 2020) on the 25th July 2020. This paper work has already been published in Advances in Mathematics: Scientific Journal 9 (2020), no.9, 6631–6639 ISSN: 1857-8365 (printed); 1857-8438 (electronic). This work was focused on the determination of optimum fly ash to clay ratio, preferred kinetic models and adsorption isotherms based on the experimental studies conducted to analyze the suitability of using the adsorbent fly ash-clay composite for the treatment of automobile service station wastewater.