Back to Search
Start Over
Compost salinity assessment via portable X-ray fluorescence (PXRF) spectrometry.
- Source :
-
Waste Management . Aug2018, Vol. 78, p158-163. 6p. - Publication Year :
- 2018
-
Abstract
- Compost salinity is an ongoing concern for compost producers, especially with certain feedstocks and in arid or semiarid regions. Current testing protocols call for sampling and testing ex-situ via 1:5 (w/v) slurries via electrical conductance. For this research an alternate approach has been proposed, the use of portable X-ray fluorescence (PXRF) spectrometry. Adapting methods developed for soil and water salinity analysis via PXRF, elemental data was used as a proxy for the prediction of compost salinity. In total, 74 compost samples were scanned with PXRF followed by traditional laboratory analysis. Results indicated a strong correlation between the datasets (R 2 0.80; RMSE 1.04 dS m −1 ), similar to findings for soil and water salinity. Furthermore, using the same elemental dataset, compost pH was reasonably predicted (R 2 0.63; RMSE 0.35). PXRF has the benefit of being able to be conducted in-situ or in the laboratory. And, multiple chemical parameters of interest can potentially be predicted from the same dataset. In conclusion, PXRF shows promise for rapid, in-situ salinity determination of composted products. [ABSTRACT FROM AUTHOR]
- Subjects :
- *MEASUREMENT of salinity
*SLURRY
*ELECTRIC admittance
*FLUORESCENCE
*SPECTROMETRY
Subjects
Details
- Language :
- English
- ISSN :
- 0956053X
- Volume :
- 78
- Database :
- Academic Search Index
- Journal :
- Waste Management
- Publication Type :
- Academic Journal
- Accession number :
- 131334168
- Full Text :
- https://doi.org/10.1016/j.wasman.2018.05.044