纤维素-木质素比例对远志木水热炭吸附铀（Ⅵ）的影响

IF 3.3 3区环境科学与生态学 Q2 ENVIRONMENTAL SCIENCES

Frontiers in Environmental Science Pub Date : 2024-09-05 DOI:10.3389/fenvs.2024.1451496

FanQin Yang, Hanhan Li, Boya Wang, Wei Fan, Xiaoyan Gu, Ying Cao, Shanglian Hu

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引用次数: 0

摘要

本文研究了竹子中不同比例的纤维素/木质素对水热生物炭生产的影响。应用不同的表征技术探索了三种不同基因型（215、30-A、52-B）的竹热液生物炭的结构，并评估了这些热液生物炭对铀的吸附行为。研究发现，纤维素/木质素比率（3.08、2.68 和 2.58）的降低对热液生物炭的比表面积和孔隙率有积极影响。因此，在这三种比例下，制备的水热生物炭对 U(VI)离子的吸附容量分别为 14.78 毫克/克、24.68 毫克/克和 26.02 毫克/克。52-B-220 的吸附过程很好地符合 Freundlich 等温线，这表明在固液界面上发生了多层吸附，但基因型 30-A 和 215 制备的生物柴油的吸附过程则很明显是单层吸附。这项研究表明，调整生物质原料成分是提高生物炭质量的有效策略。

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Effect of cellulose-lignin ratio on the adsorption of U(Ⅵ) by hydrothermal charcoals prepared from Dendrocalamus farinosus

Herein, the impact of varying proportions of cellulose/lignin in bamboo on the production of hydrothermal biochar was investigated. Different characterization techniques were applied to explore the structure of hydrothermal biochar derived from three different genotypes (215, 30-A, 52-B) of Dendrocalamus farinosus, and the adsorption behavior of uranium by these hydrothermal biochars was evaluated. It was found that a decrease in cellulose/lignin ratio (3.08, 2.68, and 2.58) positively influenced the specific surface area and pore volume of hydrothermal biochar. Consequently, the prepared hydrothermal biochars exhibited adsorption capacities for U(VI) ions at levels of 14.78 mg/g, 24.68 mg/g, and 26.02 mg/g respectively under these three ratios. The adsorption process by 52-B-220 well complied with the Freundlich isotherm, which indicated that the multi-layer adsorption occurred on the solid liquid interface, but single-layer adsorption was evident in those prepared from genotypes 30-A and 215. This study demonstrated that adjusting biomass feedstock composition as an effective strategy for enhance the quality of biochar.

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来源期刊

Frontiers in Environmental Science Environmental Science-General Environmental Science

CiteScore

4.50

自引率

8.70%

发文量

2276

审稿时长

12 weeks

期刊介绍： Our natural world is experiencing a state of rapid change unprecedented in the presence of humans. The changes affect virtually all physical, chemical and biological systems on Earth. The interaction of these systems leads to tipping points, feedbacks and amplification of effects. In virtually all cases, the causes of environmental change can be traced to human activity through either direct interventions as a consequence of pollution, or through global warming from greenhouse case emissions. Well-formulated and internationally-relevant policies to mitigate the change, or adapt to the consequences, that will ensure our ability to thrive in the coming decades are badly needed. Without proper understanding of the processes involved, and deep understanding of the likely impacts of bad decisions or inaction, the security of food, water and energy is a risk. Left unchecked shortages of these basic commodities will lead to migration, global geopolitical tension and conflict. This represents the major challenge of our time. We are the first generation to appreciate the problem and we will be judged in future by our ability to determine and take the action necessary. Appropriate knowledge of the condition of our natural world, appreciation of the changes occurring, and predictions of how the future will develop are requisite to the definition and implementation of solutions. Frontiers in Environmental Science publishes research at the cutting edge of knowledge of our natural world and its various intersections with society. It bridges between the identification and measurement of change, comprehension of the processes responsible, and the measures needed to reduce their impact. Its aim is to assist the formulation of policies, by offering sound scientific evidence on environmental science, that will lead to a more inhabitable and sustainable world for the generations to come.