Compost salinity assessment via portable X-ray fluorescence (PXRF) spectrometry
| Autor: | Bin Li, Sanjit K. Deb, David C. Weindorf, Atinderpal Singh, Nana Yaw O. Kusi, Somsubhra Chakraborty |
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| Rok vydání: | 2018 |
| Předmět: |
Compost
fungi Soil science 04 agricultural and veterinary sciences 010501 environmental sciences engineering.material Mass spectrometry complex mixtures 01 natural sciences Salinity Testing protocols 040103 agronomy & agriculture engineering 0401 agriculture forestry and fisheries Environmental science Portable X-ray Waste Management and Disposal 0105 earth and related environmental sciences |
| Zdroj: | Waste management (New York, N.Y.). 78 |
| ISSN: | 1879-2456 |
| Popis: | 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 (R2 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 (R2 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. |
| Databáze: | OpenAIRE |
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