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从生物炭复合材料中有效地去除基和多基物质:循环吸附和废旧再生剂降解

Jiaqin Deng¹, Jianing Han², Changlan Hou³

¹College of Environmental Science and Engineering, Central South University of Forestry and Technology, Changsha, 410004, China; State Key Laboratory of Utilization of Woody Oil Resource, Hunan Academy of Forestry, Changsha, 410004, China.

|September 3, 2023

概括

一种新的生物炭复合物通过吸附有效地去除和多基物质 (PFAS),并实现有效的再生. 这一突破为环境应用中PFAS去除和降解提供了有希望的解决方案.

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:

由于其持久性和广泛的污染,和多基基物质 (PFAS) 构成了重大环境挑战.
有效的吸附剂去除和再生对于有效的PFAS修复策略至关重要.

研究的目的:

开发一种新的生物碳复合物,以有效地吸附和脱离各种PFAS.
在整个PFAS去除和降解过程中调查生物炭复合物的综合性能.
探索吸附剂的可持续再生方法.

主要方法:

制备一种新型生物炭复合物,其中包含硫贝聚合物,以提高吸附性能.
吸附实验以确定不同PFAS的容量,包括PFOS,PFOA,PFBS和PFBA.
使用50°C的NaI + NaOH溶液再生吸附剂.
使用真空紫外线 (VUV) /硫酸盐减少系统进行再生PFAS溶液的深度降解.

主要成果:

生物炭复合物对各种PFAS具有很高的吸附能力,PFOS的最大吸附能力达到634mg/g.
吸附机制包括疏水性,静电相互作用,孔隙扩散和复杂化.
吸附剂使用NaI + NaOH溶液有效再生,可以再循环超过4次.
在VUV/硫酸盐减少系统实现了高降解 (89.1%-99.9%) 和脱 (63.3%-84.1%) 效率在再生溶液中的PFAS.

结论:

这种新型生物炭复合物在有效的PFAS吸附和再生方面表现出色.
吸附,再生和VUV/硫酸盐降解的综合方法为全面的PFAS处理提供了一个有前途的技术.
这项研究提供了一个新的PFAS去除,脱落和随后的深度降解系统,具有显著的环境应用潜力.

关键词:

吸附方式吸附方式吸附方式生物炭是一种生物炭.聚合物的共聚物.降解降解是一种降解.和多醇基物质是多和多的.再生再生再生的过程

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