Preparation of carbon-based material with high water absorption capacity and its effect on the water retention characteristics of sandy soil

IF 13.1 2区环境科学与生态学 Q1 ENVIRONMENTAL SCIENCES

Biochar Pub Date : 2023-09-27 DOI:10.1007/s42773-023-00260-8

Youming Yang, Mingyang Zhong, Xiuqi Bian, Yongjun You, Fayong Li

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引用次数: 1

Abstract

Abstract Biochar has the potential to provide a multitude of benefits when used in soil remediation and increasing soil organic matter enrichment. Nevertheless, the intricated, hydrophobic pores and groups weaken its water-holding capacity in dry, sandy soils in arid lands. In order to combat this issue, starch-carbon-based material (SB), sodium alginate-carbon-based material (SAB), and chitosan-carbon-based material (CB) have been successfully synthesized through the graft-polymerization of biochar (BC). A series of soil column simulations were used to scrutinize the microstructure of the carbon-based material and explore its water absorption properties and its effects on sandy soil water infiltration, water retention, and aggregation. The results indicated that SB, SAB, and CB achieved water maximum absorption rates of 155, 188, and 172 g g −1 , respectively. Considering their impact on sandy soils, SB, SAB, and CB lengthened infiltration times by 1920, 3330, and 3880 min, respectively, whilst enhancing the water retention capabilities of the soil by 18%, 25%, and 23% in comparison to solely adding BC. The utilization of these innovative materials notably encouraged the formation of sandy soil aggregates ranging from 2.0 to 0.25 mm, endowing the aggregates with enhanced structural stability. Findings from potting experiments suggested that all three carbon-based materials were conducive to the growth of soybean seeds. Thus, it is evident that the carbon-based materials have been fabricated with success, and they have great potential not only to significantly augment the water retention capacities and structural robustness of sandy soils in arid areas, but also to bolster the development of soil aggregates and crop growth. These materials possess significant application potential for enhancing the quality of sandy soils in arid and semi-arid regions. Graphical Abstract

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高吸水性碳基材料的制备及其对沙土保水特性的影响

生物炭在土壤修复和增加土壤有机质富集方面具有许多潜在的优势。然而，在干旱地区的干燥沙质土壤中，复杂的疏水孔隙和基团削弱了其持水能力。为了解决这一问题，通过生物炭(BC)的接枝聚合，成功合成了淀粉-碳基材料(SB)、海藻酸钠-碳基材料(SAB)和壳聚糖-碳基材料(CB)。采用一系列土壤柱模拟研究了碳基材料的微观结构，探讨了碳基材料的吸水特性及其对沙土水分入渗、保水和团聚的影响。结果表明，SB、SAB和CB的最大吸水率分别为155、188和172 g g−1。考虑到其对沙质土壤的影响，与单独添加BC相比，SB、SAB和CB分别延长了入渗时间1920、3330和3880 min，同时提高了土壤的保水能力18%、25%和23%。这些创新材料的使用显著促进了2.0 - 0.25 mm沙土团聚体的形成，增强了团聚体的结构稳定性。盆栽试验结果表明，这三种碳基材料都有利于大豆种子的生长。因此，很明显，碳基材料的制备是成功的，它们不仅具有显着增强干旱地区沙质土壤的保水性和结构稳健性的巨大潜力，而且还具有促进土壤团聚体发育和作物生长的潜力。这些材料在改善干旱半干旱区沙质土质量方面具有重要的应用潜力。图形抽象

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来源期刊

Biochar Multiple-

CiteScore

18.60

自引率

10.20%

发文量

期刊介绍： Biochar stands as a distinguished academic journal delving into multidisciplinary subjects such as agronomy, environmental science, and materials science. Its pages showcase innovative articles spanning the preparation and processing of biochar, exploring its diverse applications, including but not limited to bioenergy production, biochar-based materials for environmental use, soil enhancement, climate change mitigation, contaminated-environment remediation, water purification, new analytical techniques, life cycle assessment, and crucially, rural and regional development. Biochar publishes various article types, including reviews, original research, rapid reports, commentaries, and perspectives, with the overarching goal of reporting significant research achievements, critical reviews fostering a deeper mechanistic understanding of the science, and facilitating academic exchange to drive scientific and technological development.