探索生物炭的不同修改方法,以从水中去除Se(IV):吸附和减少的协同效应
Yu-Ying Wang1, Juan Yu2, Rong-Ting Jiao3
1State Key Laboratory for Quality and Safety of Agro-Products, Zhejiang Provincial Key Laboratory of Agricultural Microbiomics, Institute of Environment, Resource, Soil and Fertilizer, Zhejiang Academy of Agricultural Sciences, Hangzhou, PR China; Engineering Research Center of Biochar of Zhejiang Province, Hangzhou 310021, PR China.
Journal of contaminant hydrology
|January 24, 2026
概括
用铁和氧化物对生物炭的处理后修改显著提高了其从水中去除化物 (Se(IV)) 的能力. 这种A-Fe/Mn-BC纳米材料显示出治疗污染的巨大潜力.
科学领域:
- 环境科学 环境科学
- 材料科学 材料科学 材料科学
- 化学 化学 化学
背景情况:
- (Se) 是一种必需的微量营养素,但在高度下是有毒的,对人类健康和生态系统构成风险.
- 化 (Se(IV)) 是水源中污染的一种常见形式.
- 生物炭是水污染物的潜在吸收剂,但通过修改可以提高其有效性.
研究的目的:
- 调查处理前后修改对生物炭特性对化物去除的影响.
- 为了比较未经修改的生物炭 (BC),预处理的生物炭 (F-Fe/Mn-BC) 和后处理的生物炭 (A-Fe/Mn-BC) 的性能.
- 为了确定最佳的吸附参数,并了解通过修饰生物炭去除Se(IV) 的机制.
主要方法:
- 通过预处理 (Fe/Mn浸) 和后处理 (Fe/Mn氧化物加载) 来改变生物炭.
- 使用先进的分析技术对生物炭样品进行全面的表征.
- 批量吸附实验以评估在不同pH值,接触时间,初始度和共存离子下Se(IV) 去除效率.
主要成果:
- 经过后处理的生物炭 (A-Fe/Mn-BC) 对Se(IV (248.8 mg·g-1) 的最大吸附能力显著提高,大约是BC和F-Fe/Mn-BC的三倍.
- 移除机制涉及表面吸附和减少Se(IV) 到元素 (Se(0) 通过Fe(II) 和Mn(II) 在生物炭表面的介导.
- 同时存在的离子对A-Fe/Mn-BC的Se(IV) 移除效率的影响最小.
结论:
- 处理后的修改比预处理更有效地提高生物炭的Se (IV) 吸附性能.
- A-Fe/Mn-BC纳米材料在有效地从污染水中去除化物方面具有很好的潜力.
- 这项研究强调了先进纳米材料的发展,以有效地对污染的环境整治.
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