Pollutant Diesel Soot Derived Onion-like Nanocarbons for the Adsorption of Organic Dyes and Environmental Assessment of Treated Wastewater

Gunture,; Kaushik, Jaidev; Garg, Anjali Kumari; Saini, Deepika; Khare, Prateek; Sonkar, Sumit Kumar

Pollutant Diesel Soot Derived Onion-like Nanocarbons for the Adsorption of Organic Dyes and Environmental Assessment of Treated Wastewater

2020

The presented finding offers a sustainable approach for the successful utilization of the pollutant soot in the form of waste black carbon (BC), collected from the exhausts of a diesel engine as an efficient adsorbent. The morphology of the as-isolated diesel particulate soot was observed in nanosize consisting of an Onion like Nano-Carbon (ONC) structure. The ONC were transformed into water-soluble Onion like Nano-Carbon (wsONC) via the simplest method of oxidation. For applicability as an adsorbent, wsONC was used for the removal of three cationic organic dyes, methylene blue (MB), crystal violet (CV), and rhodamine B (RhB). Among the three cationic dyes, MB showed significant results compared with the other two. A small amount of wsONC was found to be capable of removing ∼100 mg L–¹ of MB within the time of ∼60 min. While with CV and RhB, the removal efficiency was observed to be ∼60 mg L–¹ and ∼40 mg L–¹, respectively. In a comparative adsorption analysis, the performance of wsONC was ∼2.5 times higher than the as isolated ONC. Another novelty associated with the present finding is the uses of the treated wastewater for watering the Triticum aestivum (wheat) and Cicer arietinum (gram) plants for the initial 15 days. Compared to the dye water, the treated wastewater plants showed healthy growth.

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