Multifunctional diesel exhaust emission soot coated sponge for water treatment
We demonstrated that a pollutant and waste, diesel exhaust emission soot (DEES) can be used as an absorbent to remove oil and organic pollutants from wastewater. The diesel exhaust emission soot coated sponge (DEES sponge) was prepared using the dip-coating method. Prepared DEES sponge was found hydrophobic in nature as the contact angle between water drop and its surface was recorded to be 147°. The DEES sponge showed high absorption capacity with various oils, without any surface modifications and pretreatments. Highest oil absorption capacity was found to be 39 g/g for engine oil. Excellent separation efficiency was recorded (max. 98.5% for engine oil). It shows promising recyclability having 95% efficiency even after 10 cycles. DEES sponge also demonstrated the capability to be used as an adsorbent due to its ability to absorb pollutants like methylene blue (MB), ciprofloxacin, and detergent from the water. It was able to adsorb 93% of the dye MB from its aqueous solution having concentration of 15 μM.
KeywordsDiesel exhaust emission soot Oil-water filter Adsorption
- Dorri Moghadam A, Omrani E, Menezes PL, Rohatgi PK (2015) Mechanical and tribological properties of self-lubricating metal matrix nanocomposites reinforced by carbon nanotubes (CNTs) and graphene - a review. Compos Part B Eng 77:402–420. https://doi.org/10.1016/j.compositesb.2015.03.014 CrossRefGoogle Scholar
- Kawabata Y, Udagawa T, Higuchi K et al (1988) Lung injury and carcinogenesis following transtracheal instillation of diesel soot particle of the lung. J Japan Soc Air Pollut 23:32–40Google Scholar
- Le Cloirec P, Faur C (2006) Adsorption of organic compounds onto activated carbon — applications in water and air treatments. In: Activated carbon surfaces in environmental. Remediation:375–419Google Scholar
- Spinks GM, Wallace GG, Fifield LS, Dalton LR, Mazzoldi A, de Rossi D, Khayrullin II, Baughman RH (2002) Pneumatic carbon nanotube actuators. Adv Mater 14:1728–1732. https://doi.org/10.1002/1521-4095(20021203)14:23<1728::AID-ADMA1728>3.0.CO;2-8 CrossRefGoogle Scholar