Leaching Characteristics of Organic and Inorganic Matter from Biomass by Water: Differences between Batch and Semi-continuous Operations
Over 30% and ~2% (on a carbon basis) organic matter can be leached from mallee leaf and wood by water, respectively, producing acidic leachates containing organic acids. As a result, there are significant differences in the leaching characteristics of both organic and inorganic species in biomass be...
| Main Authors: | , |
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| Format: | Journal Article |
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American Chemical Society
2013
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| Online Access: | http://hdl.handle.net/20.500.11937/25735 |
| _version_ | 1848751790472822784 |
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| author | Liaw, Sui Boon Wu, Hongwei |
| author_facet | Liaw, Sui Boon Wu, Hongwei |
| author_sort | Liaw, Sui Boon |
| building | Curtin Institutional Repository |
| collection | Online Access |
| description | Over 30% and ~2% (on a carbon basis) organic matter can be leached from mallee leaf and wood by water, respectively, producing acidic leachates containing organic acids. As a result, there are significant differences in the leaching characteristics of both organic and inorganic species in biomass between batch and semi-continuous leaching operations. Under conventional batch leaching, the acidic leachate continuously contacts the biomass for a prolonged period, resulting in the leaching of at least some water-insoluble inorganic species (e.g., organically bound) from biomass. Therefore, the batch leaching method clearly overestimates the amount of water-soluble inorganic species in biomass and exhibits two-step leaching kinetics, i.e. a rapid leaching step for an initial short period followed by a slow leaching step for a relatively long period. This study further develops a semi-continuous leaching method to address this issue via minimizing the contact between the leachate and the biomass sample. The semi-continuous leaching quantifies the true water-soluble inorganic species in biomass. Its leaching kinetics include only the first rapid leaching step, with the disappearance of the second slow-leaching step due to the absence of the interaction between acidic leachate and biomass.The results suggest that in the sequential extraction scheme used in chemical fractionation, semi-continuous (instead of batch) water leaching method should be used for quantifying water-soluble inorganic species in biomass. Attention should also be paid to the potentially substantial loss of fuel materials when utilizing water leaching as a pretreatment method to remove inherent inorganic species in biomass for fuel quality improvement. As result of overestimating water-soluble inorganic species and loss of organic matter, care must be taken when using water batch washing as a method for studying the effect of the inherent water-soluble inorganic species on thermochemical reactions of biomass. |
| first_indexed | 2025-11-14T07:58:19Z |
| format | Journal Article |
| id | curtin-20.500.11937-25735 |
| institution | Curtin University Malaysia |
| institution_category | Local University |
| last_indexed | 2025-11-14T07:58:19Z |
| publishDate | 2013 |
| publisher | American Chemical Society |
| recordtype | eprints |
| repository_type | Digital Repository |
| spelling | curtin-20.500.11937-257352017-09-13T15:16:05Z Leaching Characteristics of Organic and Inorganic Matter from Biomass by Water: Differences between Batch and Semi-continuous Operations Liaw, Sui Boon Wu, Hongwei Over 30% and ~2% (on a carbon basis) organic matter can be leached from mallee leaf and wood by water, respectively, producing acidic leachates containing organic acids. As a result, there are significant differences in the leaching characteristics of both organic and inorganic species in biomass between batch and semi-continuous leaching operations. Under conventional batch leaching, the acidic leachate continuously contacts the biomass for a prolonged period, resulting in the leaching of at least some water-insoluble inorganic species (e.g., organically bound) from biomass. Therefore, the batch leaching method clearly overestimates the amount of water-soluble inorganic species in biomass and exhibits two-step leaching kinetics, i.e. a rapid leaching step for an initial short period followed by a slow leaching step for a relatively long period. This study further develops a semi-continuous leaching method to address this issue via minimizing the contact between the leachate and the biomass sample. The semi-continuous leaching quantifies the true water-soluble inorganic species in biomass. Its leaching kinetics include only the first rapid leaching step, with the disappearance of the second slow-leaching step due to the absence of the interaction between acidic leachate and biomass.The results suggest that in the sequential extraction scheme used in chemical fractionation, semi-continuous (instead of batch) water leaching method should be used for quantifying water-soluble inorganic species in biomass. Attention should also be paid to the potentially substantial loss of fuel materials when utilizing water leaching as a pretreatment method to remove inherent inorganic species in biomass for fuel quality improvement. As result of overestimating water-soluble inorganic species and loss of organic matter, care must be taken when using water batch washing as a method for studying the effect of the inherent water-soluble inorganic species on thermochemical reactions of biomass. 2013 Journal Article http://hdl.handle.net/20.500.11937/25735 10.1021/ie3031168 American Chemical Society restricted |
| spellingShingle | Liaw, Sui Boon Wu, Hongwei Leaching Characteristics of Organic and Inorganic Matter from Biomass by Water: Differences between Batch and Semi-continuous Operations |
| title | Leaching Characteristics of Organic and Inorganic Matter from Biomass by Water: Differences between Batch and Semi-continuous Operations |
| title_full | Leaching Characteristics of Organic and Inorganic Matter from Biomass by Water: Differences between Batch and Semi-continuous Operations |
| title_fullStr | Leaching Characteristics of Organic and Inorganic Matter from Biomass by Water: Differences between Batch and Semi-continuous Operations |
| title_full_unstemmed | Leaching Characteristics of Organic and Inorganic Matter from Biomass by Water: Differences between Batch and Semi-continuous Operations |
| title_short | Leaching Characteristics of Organic and Inorganic Matter from Biomass by Water: Differences between Batch and Semi-continuous Operations |
| title_sort | leaching characteristics of organic and inorganic matter from biomass by water: differences between batch and semi-continuous operations |
| url | http://hdl.handle.net/20.500.11937/25735 |