A paper we should take note of:
Aryal, R., Kandel, D., Acharya, D., Chong, M.N., Beecham., S. 2012.
Unusual Sydney dust storm and its mineralogical and organic characteristics.
Environmental Chemistry 9, 537-546
The dust storm was in 2009 and affected Sydney and Brisbane. Aryal et al (2012) did a thorough study on the dust material, and revealed four particle mode sizes: 0.6, 4.5, 9.3, 20 micrometrres.
The investigators made a neat use of thermogravimetric analysis- we do not see enough TG usage and this application is very welcome. TG revealed an organic content 10.6%. They only report a TG curve, it would have been very useful if they had produced a DTG curve. Their TG curve appears to contain various interesting events.
Our TG reproduction is much better than the original; in the original paper the figures are very small and relatively indistinct. Fig.7 is full of suggestion- a DTG picture could have been remarkably interesting.
The authors concluded that the particles contained Si, Al and Fe in oxide form in which the Al/Si ratio was 0.39. The high organic content and the Al/Si ratio indicated that the particles orginated from agricultural land as well as desert.
Aryal, R., Kandel, D., Acharya, D., Chong, M.N., Beecham., S. 2012.
Unusual Sydney dust storm and its mineralogical and organic characteristics.
Environmental Chemistry 9, 537-546
The dust storm was in 2009 and affected Sydney and Brisbane. Aryal et al (2012) did a thorough study on the dust material, and revealed four particle mode sizes: 0.6, 4.5, 9.3, 20 micrometrres.
Our TG reproduction is much better than the original; in the original paper the figures are very small and relatively indistinct. Fig.7 is full of suggestion- a DTG picture could have been remarkably interesting.
The authors concluded that the particles contained Si, Al and Fe in oxide form in which the Al/Si ratio was 0.39. The high organic content and the Al/Si ratio indicated that the particles orginated from agricultural land as well as desert.
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