沸石/生物炭复合材料对重金属污染红壤的协同修复和改良效应的机理研究

IF 6.1 2区 环境科学与生态学 Q2 ENGINEERING, ENVIRONMENTAL
Jing Li, Dazhong Yang, Wensong Zou, Xuezhen Feng, Ranhao Wang, Renji Zheng, Siyuan Luo, Zheting Chu, Hong Chen
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引用次数: 0

摘要

红壤是全球热带/亚热带地区最重要的土壤资源,面临着养分缺乏、酸化和重金属污染等巨大威胁。人们亟需能够改变这种状况的多功能生态材料。在此,我们利用广泛分布的土壤和生物质开发了一种沸石/生物炭复合材料,用于红壤的协同修复和改良。在最佳条件下,复合材料对茎干中铅2+和镉2+的修复效率分别达到了92.8%和92.9%。此外,红壤的酸性和养分缺乏状况也得到了明显改善。利用互补表征方法阐明了修复和改良过程中的原子尺度相互作用机制,结果表明,在沸石/生物炭复合材料中,沸石对重金属的长期修复效果做出了贡献。同时,生物炭负责土壤质量改良和短期重金属修复。此外,在修复过程中,首次在生物炭上观察到单原子重金属离子,这表明单原子在自然环境中分布广泛。
本文章由计算机程序翻译,如有差异,请以英文原文为准。

Mechanistic insights into the synergetic remediation and amendment effects of zeolite/biochar composite on heavy metal-polluted red soil

Mechanistic insights into the synergetic remediation and amendment effects of zeolite/biochar composite on heavy metal-polluted red soil

Red soil, the most critical soil resource in tropical/subtropical regions worldwide, faces tremendous threats, including nutrient deficiency, acidification, and heavy metal contamination. There is a great demand for multifunctional eco-materials capable of modifying this situation. Herein, we used widely distributed soil and biomass to develop a zeolite/biochar composite for synergistic red soil remediation and amendment. With the composite material, the Pb2+ and Cd2+ remediation efficiencies reached 92.8% and 92.9%, respectively, in stems under optimal conditions. Moreover, the acidity and nutrient deficiency conditions of red soil significantly improved. The atomic-scale interaction mechanism during the remediation and amendment process was elucidated with complementary characterization methods, which revealed that in the zeolite/biochar composite material, zeolite contributes to long-term heavy metal remediation effects. Simultaneously, biochar is responsible for soil quality amendment and short-term heavy metal remediation. Furthermore, for the first time, single-atom heavy metal ions were observed on biochar during the remediation process, indicating the broad distribution of single atoms in the natural environment.

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来源期刊
Frontiers of Environmental Science & Engineering
Frontiers of Environmental Science & Engineering ENGINEERING, ENVIRONMENTAL-ENVIRONMENTAL SCIENCES
CiteScore
10.90
自引率
12.50%
发文量
988
审稿时长
6.1 months
期刊介绍: Frontiers of Environmental Science & Engineering (FESE) is an international journal for researchers interested in a wide range of environmental disciplines. The journal''s aim is to advance and disseminate knowledge in all main branches of environmental science & engineering. The journal emphasizes papers in developing fields, as well as papers showing the interaction between environmental disciplines and other disciplines. FESE is a bi-monthly journal. Its peer-reviewed contents consist of a broad blend of reviews, research papers, policy analyses, short communications, and opinions. Nonscheduled “special issue” and "hot topic", including a review article followed by a couple of related research articles, are organized to publish novel contributions and breaking results on all aspects of environmental field.
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