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Treatment of microcystin-LR cyanotoxin contaminated water using Kentucky bluegrass-derived biochar
Journal of Water Process Engineering ( IF 7 ) Pub Date : 2021-04-06 , DOI: 10.1016/j.jwpe.2021.102054
Hak Jin Song , Ranjit Gurav , Shashi Kant Bhatia , Eun Bin Lee , Hyung Joo Kim , Yung-Hun Yang , Eunsung Kan , Ho Hyun Kim , Sang Hyun Lee , Yong-Keun Choi

The present study revealed adsorption behaviors of microcystin-LR (MC-LR) on pristine biochars (BCs) derived from various waste biomass of Kentucky bluegrass (KB) (Poa pratensis L.), microalgae (Spirulina sp.), grape pomace, coffee residues, and rice husk. BCs obtained from waste biomass on pyrolysis at 350, 550, and 750 °C for 2 h demonstrated different physicochemical characteristics. The maximum adsorption capacity of 2769 μg MC-LR/g was observed in KB biochar prepared at 750 °C (KB-BC750) with the involvement of hydrophobic and π-π interaction, electrostatic attraction, ion exchange, and surface complexation as the principal adsorption mechanisms. MC-LR adsorption onto KB- fitted well to Elovich kinetic and Freundlich isotherm model or the sorption. Furthermore, MC-LR adsorption from the real wastewater using KB-BC750 demonstrated significant removal (ca. 50 %) as compared to the distilled water. Therefore, the results of the present study have heightened the strategies to remove MC-LR from the wastewater using cheap adsorbents like KB-BCs.



中文翻译:

使用肯塔基草提取的生物炭处理微囊藻毒素-LR氰毒素污染的水

本研究揭示了微囊藻毒素-LR(MC-LR)在原始生物炭(BCs)上的吸附行为,这些生物炭来自肯塔基州蓝草(KB)(Poa pratensis L.),微藻类(螺旋藻)的各种废物生物质。),葡萄渣,咖啡渣和稻壳。在350、550和750°C下热解2小时从废物生物质中获得的BCs表现出不同的理化特性。在750°C(KB-BC750)制备的KB生物炭中观察到最大吸附容量为2769μgMC-LR / g(主要是疏水和π-π相互作用,静电吸引,离子交换和表面络合)吸附机制。MC-LR在KB上的吸附非常适合Elovich动力学模型和Freundlich等温模型或吸附。此外,与蒸馏水相比,使用KB-BC750从真实废水中吸附MC-LR表现出显着的去除率(约50%)。因此,本研究的结果提高了使用廉价吸附剂(如KB-BCs)从废水中去除MC-LR的策略。

更新日期:2021-04-06
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