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首页> 外文期刊>South-East European Forestry >Valorisation of Waste Wood Biomass as Biosorbent for the Removal of Synthetic Dye Methylene Blue from Aqueous Solutions
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Valorisation of Waste Wood Biomass as Biosorbent for the Removal of Synthetic Dye Methylene Blue from Aqueous Solutions

机译：废木材生物质作为生物吸附剂的增值作用，用于从水溶液中去除合成染料亚甲基蓝

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Background and Purpose: Wood and wood processing industries are generators of a substantial amount of waste wood biomass, such as wood chips, shavings and sawdust. Such waste is often unused and its disposal can be a serious environmental problem. Different lignocellulosic waste materials have been successfully used as low-cost adsorbents (biosorbents) for the removal of synthetic dyes, as well as other contaminants, from wastewater. The aim of this study was to valorise the waste wood biomass of ten tree species, out of which seven are the most represented species of the Croatian growing stock, as biosorbents for the removal of synthetic dye methylene blue (MB) from model solutions. Materials and Methods: The waste wood biomasses (shavings or sawdust) of ten tree species, namely common beech, pedunculate oak, sessile oak, common hornbeam, narrow-leafed ash, poplar, European silver fir, Norway spruce, European larch and Douglas fir, were dried and milled prior to characterisation and adsorption experiments. Characterisation of the biosorbents was performed by chemical analysis and Fourier transform Fourier transform infrared spectroscopy (FTIR). Upon characterisation, batch adsorption experiments were conducted in order to survey waste wood biomass as potential adsorbents for the removal of synthetic dye MB. The colour removal was monitored spectrophotometrically at predetermined time intervals. Further adsorption experiments were performed using poplar sawdust. The effects of contact time, biosorbent concentration, initial dye concentration, and pH on the adsorption process were investigated. The experimental data obtained by batch adsorption experiments were analysed using adsorption isotherm models (Freundlich and Langmuir). Results: All the tested biosorbents were found to be very effective for the removal of MB from model dye solution, achieving high removal percentages ranging from 93.25 to 98.50%. Poplar sawdust proved to be the most effective. It was shown that MB adsorption process onto poplar sawdust could be interpreted in terms of Langmuir and Freundlich adsorption isotherm models. Conclusions: Taken together, these results suggest that waste wood biomass has the potential to be used as a low-cost biosorbent for MB removal from aqueous solutions.
机译：背景和目的：木材和木材加工业是大量木材生物废料的产生者，例如木屑，刨花和锯末。这种废物通常是未使用的，其处置可能是一个严重的环境问题。不同的木质纤维素废料已成功用作低成本吸附剂（生物吸附剂），用于从废水中去除合成染料以及其他污染物。这项研究的目的是使十种树种的废木材生物量得到增值，其中七种是克罗地亚生长种群中最具代表性的树种，作为从模型溶液中去除合成染料亚甲基蓝（MB）的生物吸附剂。材料和方法：十个树种的废木材生物量（刨花或锯末），分别为山毛榉，带花梗的橡木，无梗的橡树，普通的角树，窄叶灰，白杨，欧洲白枞，挪威云杉，欧洲落叶松和花旗松在表征和吸附实验之前将其干燥和研磨。通过化学分析和傅里叶变换傅里叶变换红外光谱（FTIR）进行生物吸附剂的表征。根据特性，进行批量吸附实验，以调查废木材生物质作为去除合成染料MB的潜在吸附剂。以预定的时间间隔用分光光度法监测颜色的去除。使用杨木屑进行进一步的吸附实验。研究了接触时间，生物吸附剂浓度，初始染料浓度和pH值对吸附过程的影响。使用吸附等温线模型（Freundlich和Langmuir）分析通过间歇吸附实验获得的实验数据。结果：发现所有测试的生物吸附剂对于从模型染料溶液中去除MB都非常有效，去除率高达93.25％至98.50％。白杨木屑被证明是最有效的。结果表明，MB对杨木屑的吸附过程可以用Langmuir和Freundlich吸附等温线模型来解释。结论：综上所述，这些结果表明废木材生物量具有用作低成本生物吸附剂的潜力，可用于从水溶液中去除MB。

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