Comparisons of computer-controlled chamber measurements for soil–skin adherence from aluminum and carpet surfaces,

Ferguson, Alesia; Bursac, Zoran; Coleman, Sheire; Johnson, Wayne

doi:10.1016/j.envres.2008.12.011

Cited by 16 publications

(9 citation statements)

References 30 publications

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“…This is not a significant addition, showing that the majority of adherence occurs in the first contact, as was evidenced for transfer with potting soil and play sand from previous experiments using this methodology. [11,12] It is not clear without further experimentation if any additional contact (i.e., multiple contacts beyond two contacts) between the surfaces would result in any more transfer. The average standard deviations were reasonable for 'First Transfer' and for 'Total Transfer' and were similar at 18.31% and 18.84% of the average transfers, respectively.…”

Section: Discussionmentioning

confidence: 98%

“…Contact pressures were varied from 20 kPa to 60 kPa to primarily allow comparison with the contact pressures from previous studies from this group. [10][11][12][13] These pressures were indicated by pediatric and occupational therapy literature for grip pressures exerted by children and adults. [22][23][24][25] The motions and pressures involved in making clay pottery might be expected to include a wide range of contact pressures above those measured here.…”

Section: Contact Pressure and Time Rangementioning

confidence: 99%

“…[10,11,12,13,14,15,16,17,18,19] No identified study has looked specifically at the adherence of clays to the human skin, forcing scientists to quantify dioxin exposure based on adherence values for other, and oftentimes, un-descriptive soils. [7] Soil-skin adherence can have a significant influence on the calculated measure of dermal exposure and therefore dermal dose to a contaminant.…”

Section: Introductionmentioning

confidence: 99%

“…Over 768 multiple contacts experiments have been previously presented to look at the adherence of clay-sand and potting soil from aluminum and carpet surface to cloth samples and human cadaver skin in the same mechanical chamber. [10][11][12][13] Descriptions of contact pressures and time ranges, cloth and clay preparation, the mechanical chamber and experimental methods are provided next.…”

Section: Introductionmentioning

confidence: 99%

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Computer controlled chamber measurements for clay adherence relevant for potential dioxin exposure through skin

Ferguson

Bursac

Johnson

et al. 2012

Journal of Environmental Science and Health, Part A

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A computer-controlled mechanical chamber was used to control the contact between aluminum sheet samples laden with clay, and cotton sheet samples for the measurement of mass transfer. The contact parameters of pressure (20 to 60 kPa) and time (10 to 70 sec) were varied for 160 multiple experiments of mass soil transfer. Before log transformation the average transfer for 'First Transfer' of clay particles was 34.4 ± 6.3 mg/8.97 cm(2) while that for 'Total Transfer' was 36.1 ± 6.8 mg/8.97 cm(2). Second contact, therefore, resulted in an average transfer of 1.70 ± 0.76 mg/8.97 cm(2). These values are well above adherence values measured for potting soil and sand as reported for previous experiments using the same methodologies. Based on the univariate analysis and the multiple regression analysis we were able to see some effect of parameters on the clay adherence values. The effect of pressure increases was significant for the higher levels of 50 and 60 kPa. In addition, we observed that increases in temperature were significant for 'First Transfer,' and less so for 'Total Transfer'. Past experiments using potting soil and play sand show high adherence values to human cadaver skin over cotton sample; the same scenario would be expected for clay. This data set can be used to improve estimates of dermal exposure to dioxins found in ball clays often used by artisans in the making of pottery.

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Section: Discussionmentioning

confidence: 98%

Section: Contact Pressure and Time Rangementioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Computer controlled chamber measurements for clay adherence relevant for potential dioxin exposure through skin

Ferguson

Bursac

Johnson

et al. 2012

Journal of Environmental Science and Health, Part A

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“…Some studies on the health effects associated with self-reported exposure to indoor dampness or mold have found an increase in sinusitis [ 11 ]. Moisture, nutrients, and temperature are the most important factors that influence the growth of fungi on buildings [ 10 – 12 ].…”

Section: Discussionmentioning

confidence: 99%

Environmental Risk Factors in Patients with Noninvasive Fungal Sinusitis

et al. 2016

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Objective. The aim of our study was to try to determine the possible environmental risk factors for noninvasive fungal sinusitis in Egyptian patients. Methods. This is a prospective epidemiological case control study on the environmental risk factors of noninvasive fungal sinusitis. It included 60 patients and 100 age and sex matched controls. Results. There was a statistically significant relation between apartment floor, surface area, exposure to dust, exposure to cockroaches, poor air conditioning, and fungal sinusitis. Yet, no statistical significance was found between allergy related occupations, exposure to animals or plants, although their percentages were higher among cases, smoking, and urban or rural residence. Conclusion. We suggest that for patients with noninvasive fungal sinusitis a change in their living environment must be implied with better exposure to sunlight, larger well ventilated homes, proper cleaning of dust and cockroach extermination, and if possible the judicious use of air conditioners.

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