Evaluation of methods for water and non-volatile LNAPL content measurement in porous media
Proper characterization of contaminants in subsurface helps to clean up effectively the contaminated sites. In this study, different methods were used to quantify non-volatile light non-aqueous phase liquid (LNAPL) and water from sample columns subjected to different water to LNAPL ratios. The objec...
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| Format: | Article |
| Language: | English |
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Czech Academy of Agricultural Sciences
2019-03-01
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| Series: | Soil and Water Research |
| Subjects: | |
| Online Access: | https://swr.agriculturejournals.cz/artkey/swr-201901-0006_evaluation-of-methods-for-water-and-non-volatile-lnapl-content-measurement-in-porous-media.php |
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| author | Ayele Teressa Chala Svatopluk Matula Kamila Báťková František Doležal |
| author_facet | Ayele Teressa Chala Svatopluk Matula Kamila Báťková František Doležal |
| author_sort | Ayele Teressa Chala |
| collection | DOAJ |
| description | Proper characterization of contaminants in subsurface helps to clean up effectively the contaminated sites. In this study, different methods were used to quantify non-volatile light non-aqueous phase liquid (LNAPL) and water from sample columns subjected to different water to LNAPL ratios. The objective of the study was to evaluate methods for porous media water and LNAPL contents analysis. The liquids were sampled from the sample columns using activated carbon pellets (ACP). Sample columns water content was also measured using soil moisture sensors. Dielectric mixing model (DMM) was evaluated for the estimation of LNAPL content after water and LNAPL contents of the sample columns were determined through gravimetric analysis method. The result shows that it was possible to sample both water and LNAPL using ACP proportionally but with high standard deviations. It also shows that more liquid was sampled from sample columns subjected to only one liquid compared to sample columns subjected to two liquids. On the other hand, analysis of water and LNAPL using gravimetric analysis method gave the best result although the presence of LNAPL resulted in underestimation of water content at higher LNAPL contents. Meanwhile, the presence of LNAPL modified the bulk relative permittivity (εa) of the sample columns and resulted in overestimation of water contents measured using soil moisture sensors at higher LNAPL content. The modification of εa was used for the estimation of LNAPL using DMM. The evaluation of the model with known water and LNAPL contents and in estimating the LNAPL content of the other sample columns shows that the model could be used for the proper estimation of LNAPL in porous media. |
| first_indexed | 2024-04-10T08:04:09Z |
| format | Article |
| id | doaj.art-76c90768bf874f9197ec8030415432e9 |
| institution | Directory Open Access Journal |
| issn | 1801-5395 1805-9384 |
| language | English |
| last_indexed | 2024-04-10T08:04:09Z |
| publishDate | 2019-03-01 |
| publisher | Czech Academy of Agricultural Sciences |
| record_format | Article |
| series | Soil and Water Research |
| spelling | doaj.art-76c90768bf874f9197ec8030415432e92023-02-23T03:48:41ZengCzech Academy of Agricultural SciencesSoil and Water Research1801-53951805-93842019-03-01141475610.17221/80/2018-SWRswr-201901-0006Evaluation of methods for water and non-volatile LNAPL content measurement in porous mediaAyele Teressa ChalaSvatopluk Matula0Kamila BáťkováFrantišek Doležal1Department of Water Resources, Faculty of Agrobiology, Food and Natural Resources, Czech University of Life Sciences Prague, Prague, Czech RepublicDepartment of Water Resources, Faculty of Agrobiology, Food and Natural Resources, Czech University of Life Sciences Prague, Prague, Czech RepublicProper characterization of contaminants in subsurface helps to clean up effectively the contaminated sites. In this study, different methods were used to quantify non-volatile light non-aqueous phase liquid (LNAPL) and water from sample columns subjected to different water to LNAPL ratios. The objective of the study was to evaluate methods for porous media water and LNAPL contents analysis. The liquids were sampled from the sample columns using activated carbon pellets (ACP). Sample columns water content was also measured using soil moisture sensors. Dielectric mixing model (DMM) was evaluated for the estimation of LNAPL content after water and LNAPL contents of the sample columns were determined through gravimetric analysis method. The result shows that it was possible to sample both water and LNAPL using ACP proportionally but with high standard deviations. It also shows that more liquid was sampled from sample columns subjected to only one liquid compared to sample columns subjected to two liquids. On the other hand, analysis of water and LNAPL using gravimetric analysis method gave the best result although the presence of LNAPL resulted in underestimation of water content at higher LNAPL contents. Meanwhile, the presence of LNAPL modified the bulk relative permittivity (εa) of the sample columns and resulted in overestimation of water contents measured using soil moisture sensors at higher LNAPL content. The modification of εa was used for the estimation of LNAPL using DMM. The evaluation of the model with known water and LNAPL contents and in estimating the LNAPL content of the other sample columns shows that the model could be used for the proper estimation of LNAPL in porous media.https://swr.agriculturejournals.cz/artkey/swr-201901-0006_evaluation-of-methods-for-water-and-non-volatile-lnapl-content-measurement-in-porous-media.phpactivated carbon pellet (acp)dielectric mixing model (dmm)gravimetric analysislight non-aqueous phase liquidsilica sandsoil moisture sensor |
| spellingShingle | Ayele Teressa Chala Svatopluk Matula Kamila Báťková František Doležal Evaluation of methods for water and non-volatile LNAPL content measurement in porous media Soil and Water Research activated carbon pellet (acp) dielectric mixing model (dmm) gravimetric analysis light non-aqueous phase liquid silica sand soil moisture sensor |
| title | Evaluation of methods for water and non-volatile LNAPL content measurement in porous media |
| title_full | Evaluation of methods for water and non-volatile LNAPL content measurement in porous media |
| title_fullStr | Evaluation of methods for water and non-volatile LNAPL content measurement in porous media |
| title_full_unstemmed | Evaluation of methods for water and non-volatile LNAPL content measurement in porous media |
| title_short | Evaluation of methods for water and non-volatile LNAPL content measurement in porous media |
| title_sort | evaluation of methods for water and non volatile lnapl content measurement in porous media |
| topic | activated carbon pellet (acp) dielectric mixing model (dmm) gravimetric analysis light non-aqueous phase liquid silica sand soil moisture sensor |
| url | https://swr.agriculturejournals.cz/artkey/swr-201901-0006_evaluation-of-methods-for-water-and-non-volatile-lnapl-content-measurement-in-porous-media.php |
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