Abatement of cyanide and ammoniacal-N from coke-oven wastewater using natural adsorbents: A comparative study

• Published in: Journal of the Indian Chemical Society 2021-12, Vol.98 (12), p.100230, Article 100230
• Main Authors: Sain, Manisha, Pramanik, Sabyasachi, Baltrenaite-Gediene, Edita, Chandra Ghanta, Kartik, Dutta, Susmita
• Format: Article
• Language: English
• Subjects: Ammoniacal-N; Coke-oven wastewater; Cyanide; Laterite soil; Shale
• ISSN: 0019-4522
• DOI: 10.1016/j.jics.2021.100230

The present study aims at efficient abatement of pollutants from coke-oven wastewater using environment-friendly and low-cost adsorbents for a green world. The adsorbent used were native laterite soil (NLS), heat-treated laterite soil (HTLS), native shale (NS) and Heat-treated shale (HTS). One factor at a time (OFAT) approach was followed to determine the most effective condition based on the maximum removal. Heat-treated laterite soil and native shale were found most effective among their counterparts. Freundlich model was found best to analyze equilibrium data. The real coke-oven wastewater was collected and experiments were performed in batch mode. The percentage removal of cyanide (88.09% and 95.31%) and ammoniacal-N (87.28% and 92.12%) were found satisfactory when heat-treated laterite soil and native shale were used as adsorbents, respectively. [Display omitted] •The present study aims at efficient abatement of pollutants from coke oven wastewater using low-cost adsorbents.•The study focuses on the applicability of laterite soil and shale in their native and heat treated forms for the treatment.•Ammoniacal-N and cyanide, commonly found in coke oven wastewater, were selected as model pollutants.•The current study confirms the potential removal of concerned pollutants from synthetic as well as real coke oven wastewater.