Use of Treated Bark for the Removal of Lipids from Water

Abstract

Raw, biologically treated bark and bark impregnated with transition metal ions were used to retain the lipids from synthetic emulsions. Several experimental parameters affecting the lipid removal efficiency (RE) were studied (initial concentration of lipids, temperature, time, pH, carboxylic acid chain length, etc.). Saturated bark was characterized using Fourier transform infrared (FTIR) spectroscopy and light microscopy, and the treated bark wetting index was determined. Results show that lipid removal can exceed 95% of the initial concentration at a pH lower than 7. The uptake of lipids by these sorbents varied from 0.2 to 2.5 g/g of dry bark. Trials for regenerating the sorbent saturated by lipids allowed the recovery of approximately 95% of lipids. The calorific value of the saturated bark was approximately 79% that of domestic fuel and can be considered as an energy source, thus avoiding its waste disposal. These results may upgrade the treatment of wastewater generated by several industrial sectors, such as the food industry, surface treatment, and so on.

Investigation of Modified Mangrove Bark on the Sorption of Oil in Water

“…The two peaks between 2919 and 2850 cm -1 indicate the presence of C-H asymmetric stretching of CH 3 and CH 2 groups [11,15]. The bands present at 1440 and 1374 cm -1 may represent C-Hbending vibration and OH bending, respectively [16].The band observed at 1604 cm -1 corresponds to the benzene ring stretching vibrationsof lignin [17]. It can be seen from the FTIR spectrum of untreated and treated samples,a weak band was created at 1,735 cm -1 , related to the stretching vibration of the ester linkages between 1,725 and1,750 cm -1 [18]whichshows thatthe fibers had been esterified.The bands at 2919, 2850, 1440 cm -1 and 1374cm -1 had considerablydecreaseddue to the breaking of C-H band.…”

Characteristics and oil sorption effectiveness of kapok fibre, sugarcane bagasse and rice husks: oil removal suitability matrix

“…The usage of natural organic-based sorbents derived from plant sources represents a vital development in sustainable environmental technology since it emphasizes their biodegradability, reusability and cost-effectiveness. There have been numerous reported studies involving the use of natural plant-based sorbents for the sorption of oil such as bark [3], kenaf [4], kapok [5], milkweeds [4], rice husks [6] and sugarcane bagasse [7]. Many of these natural sorbents exhibit comparable or even higher oil sorption capacities than synthetic sorbents, but they also sorb water as well, leading to reduced oil sorption capacities.…”