Abstract
Over the past few years, the environment and public safety have suffered due to the detrimental effects of oily industrial effluents. Natural fibers have gained popularity for their affordability, reusability, and effectiveness in separating oil from oily wastewater. Milkweed fibers were characterized using FTIR (Fourier transform infrared spectroscopy), SEM (scanning electron microscopy), and contact angle techniques. With four porosities (0.90, 0.92, 0.95, and 0.98), deep bed coalescence filters were built at three different filter bed heights (10 mm, 20 mm, and 30 mm). Using milkweed coalescence filtering technology, a novel oil separation method is described along with a method to calculate oil film thickness following emulsified oily water saturation. By combining a bed height of 30 mm and a porosity of 0.98, a maximum oil separation of 99.73% and an optimized D50 droplet ratio were achieved. Throughout a prolonged operational period lasting 250 min, the filter bed, possessing a depth of 30 mm and a porosity of 98%, exhibited no discernible fouling indications. Following five cycles, the milkweed filter bed measuring 30 mm in depth and featuring a porosity of 98% displayed an impressive oil separation efficiency of 91.5%. This study found that using a milkweed deep bed filter, coalescence filtering effectively removes oil from oily effluent. Furthermore, milkweed is a natural and biodegradable fiber that is easy to dispose of after use and does not harm the environment.
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Chandra Jeet Singh: conceptualization, methodology, investigation, visualization, and writing original draft. Samrat Mukhopadhyay: supervision, visualization, writing, review, and editing. Raju Seenivasan Rengasamy: conceptualization, supervision, validation, visualization, writing, review, and editing. All authors critically revised the work.
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Singh, .J., Mukhopadhyay, S. & Rengasamy, R.S. Enhanced oil-water emulsion separation through coalescence filtration utilizing milkweed fiber: a sustainable paradigm. Environ Sci Pollut Res 30, 102389–102401 (2023). https://doi.org/10.1007/s11356-023-29385-w
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DOI: https://doi.org/10.1007/s11356-023-29385-w