Organic compounds leached from fast pyrolysis mallee leaf and bark biochars
MetadataShow full item record
Characterization of organic compounds leached from biochars is essential in assessing the possible toxicity of the biochar to the soils’ biota. In this study the nature of the leached organic compounds from Mallee biochars, produced from pyrolysis of Mallee leaf and bark in a fluidised-bed pyrolyser at 400 and 580 C was investigated. Light bio-oil compounds and aromatic organic compounds were investigated. The ‘bio-oil like’ light compounds from leaf and bark biochars ’surfaces were obtained after leaching the chars with a solvent, suitable to dissolve the respective bio-oils. GC/MS was implemented to investigate the leachates. Phenolics, which are potentially harmful toxins, were detected and their concentration shown to be dependent on the char’s origin and the char production temperature. Further, to simulate biochars amendment to soils, the chars were leached with water. The water-leached aromatic compounds from leaf and bark biochars were characterized using UV-fluorescence spectroscopy. Those results suggested that biochars contain leachable compounds of which the nature and amount is dependenton the biomass feedstock, pyrolysis temperature and leaching time.
Showing items related by title, author, creator and subject.
Lievens, C.; Mourant, D.; Hu, X.; Wang, Y.; Wu, L.; Rossiter, A.; Gunawan, Richard; He, M.; Li, Chun-Zhu (2018)Biochar is widely considered as a soil amendment. This study aims to investigate the leaching of macronutrients (K, Mg and Ca) and organics from biochars produced from mallee biomass (wood, leaf, bark) in a fluidised-bed ...
Abdullah, Hanisom binti (2010)Mallee biomass is considered to be a second-generation renewable feedstock in Australia and will play an important role in bioenergy development in Australia. Its production is of large-scale, low cost, small carbon ...
Pyrolysis of Spent Biomass from Mallee Leaf Steam Distillation: Biochar Properties and Recycling of Inherent Inorganic NutrientsGao, Xiangpeng; Yani, S.; Wu, Hongwei (2014)A set of 24 biochars were produced from the slow and fast pyrolysis (at 400-700 °C) of a mallee leaf and two spent leaves collected after distilling the leaf in steam for 30 and 60 min. Under the same experimental conditions, ...