Acute temperature dependency in the cleansing of tarry feathers utilizing magnetic particles

Orbell, John D.; Dao, Hien V.; Ngeh, Lawrence N.; Bigger, Stephen W.; Healy, Margaret; Jessop, Rosalind; Dann, Peter

doi:10.1007/s10311-005-0107-x

Cited by 7 publications

(6 citation statements)

References 6 publications

(6 reference statements)

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“…The acute temperature dependency observed for the removal of tarry residue from duck and penguin feather clusters (Orbell et al 2005) is also observed for penguin plumage (Fig. 1 a).…”

Section: Resultssupporting

confidence: 51%

“…Thus, the effectiveness of iron powder as a dry cleansing agent for the removal of a wide range of contaminants from both feather clusters and from plumage has previously been demonstrated (Orbell et al 1999(Orbell et al , 2004. More recently, this technology has been shown to effectively remove tarry contamination from feather clusters, whereby a remarkable acute temperature dependency was observed (Orbell et al 2005). We have now extended this research to the removal of the same tarry contamination from the plumage of whole bird models where the same phenomenon occurs.…”

Section: Introductionmentioning

confidence: 69%

“…The tarry oil (viscosity, 3000-4000 cSt) was melted (pour point ∼ 28 • C) and applied as a patch to the breast feathers of the carcass. Each oiled carcass was left for 30 min in a temperature-controlled room to equilibrate, in turn, to a series of ambient temperatures within the range 10-27 • C (Orbell et al 2005). At each temperature, iron powder was applied to the contamination and magnetically harvested (Orbell et al 1999).…”

Section: Methodsmentioning

confidence: 99%

“…Calculated values for H • and S • for the removal of tarry oil from duck feather clusters, penguin feather clusters (Orbell et al 2005) and penguin feather plumage, are given in Table 1. Errors are represented by the standard error in the mean, σx = s √ n , where s is the standard deviation and n is the number of observations (Kirkup 1994 ).…”

Section: Oil (Tar)mentioning

confidence: 99%

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Removal of petroleum tar from bird feathers utilizing magnetic particles

et al. 2006

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A previously reported acute temperature dependency for the effective removal of tarry residue from feather clusters, utilising magnetic particles, has also been demonstrated to occur for the plumage of whole birds, whereby a maximum removal of up to 96% may be achieved. The experimental design allows an approximate equilibrium constant, for the distribution of contaminant between the residue and the magnetic particles, to be estimated at each temperature. This allows the thermodynamics of the process to be examined via application of the van't Hoff equation, suggesting an explanation for the phenomenon.

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“…The acute temperature dependency observed for the removal of tarry residue from duck and penguin feather clusters (Orbell et al 2005) is also observed for penguin plumage (Fig. 1 a).…”

Section: Resultssupporting

confidence: 51%

Section: Introductionmentioning

confidence: 69%

Section: Methodsmentioning

confidence: 99%

Section: Oil (Tar)mentioning

confidence: 99%

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Removal of petroleum tar from bird feathers utilizing magnetic particles

et al. 2006

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“…These include: its use to remove contamination from oiled feathers (Orbell et al 2004;Dao et al 2006a), studies on the acute temperature dependence and thermodynamics of the pick-up process (Orbell et al 2005;Dao et al 2006b), the effect of pre-conditioners used in conjunction with iron powder for the removal of tarry and weathered oil (Dao et al 2006c;Orbell et al 2007) and its potential use to remove oil contamination from the surface of rock (Orbell et al 2007). …”

Section: Introductionmentioning

confidence: 99%

Mathematical Model for the Sequestering of Chemical Contaminants by Magnetic Particles

2010

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SynopsisA mathematical model is developed and implemented to characterize the pick-up of various liquid chemical contaminants by polyethylene-coated magnetic particles. The model and its associated experimental and analytical protocols were applied to a wide range of liquid chemicals in order to gain insights into the physical basis for the pickup phenomenon. The characteristics of the pick-up isotherms range between "ideal" and "non-ideal" behavior that are reflected in the mathematical model by a single parameter, α 0 , where α 0 = 1 corresponds to ideal behavior and α 0 > 1 corresponds to a departure from idealized behavior that is directly quantified by the magnitude of α 0 .The parameter α 0 is also related to the efficiency of pick-up and since the vast majority of isotherms observed in the study deviate from ideality, the high efficiency of pick-up observed in these systems has been attributed in part to this deviation. The proposed model and its associated experimental and analytical protocols demonstrate great potential for the systematic evaluation of the uptake of chemical contaminants using magnetic particle technology.

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Magnetic particle technology in environmental remediation and wildlife rehabilitation

et al. 2007

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The use of magnetic particles in environmental remediation and wildlife rehabilitation is currently under investigation at Victoria University, in collaboration with the Phillip Island Research Centre, Victoria, Australia. Iron powder has been shown to be very effective for the magnetic cleansing of feathers and plumage and is almost ideal for this purpose, being non-toxic, a non-irritant and recyclable. Detailed investigations have demonstrated that by varying particle size, particle structure and surface texture, the efficacy of oil removal from feathers and plumage can be successfully manipulated. In this regard, it is possible to identify a grade of iron powder whereby, within experimental error, effectively 100% removal of a variety of fresh contaminants from different matrices, including feathers, can be achieved. Our investigations have been extended to the application of such particles to the successful removal of tarry and weathered/tarry contamination. The results of these investigations have indicated that, for such contaminants, removals ranging from 97-99% may be achieved. Magnetic particle technology may also be adapted for the screening of pre-conditioning agents that can further assist in the removal of tarry and weathered/tarry contamination from feathers. These investigations suggest that magnetic particles could have an important role to play in environmental remediation and wildlife rehabilitation as a clean and effective technology.

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Acute temperature dependency in the cleansing of tarry feathers utilizing magnetic particles

Cited by 7 publications

References 6 publications

Removal of petroleum tar from bird feathers utilizing magnetic particles

Removal of petroleum tar from bird feathers utilizing magnetic particles

Mathematical Model for the Sequestering of Chemical Contaminants by Magnetic Particles

Magnetic particle technology in environmental remediation and wildlife rehabilitation

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