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通过生物炭支持的硫化NZVI:性能,机制和环境兼容性,协同去除Cr (VI) 和酸红73

Fenfen Xi¹, Chaoqi Bai², Jinhui Zhao³

¹State Key Laboratory of Advanced Fiber Materials, College of Chemistry and Chemical Engineering, Donghua University, Shanghai 201620, China.

Langmuir : the ACS journal of surfaces and colloids

|February 17, 2026

概括

生物炭支持的硫功能化纳米零价铁 (BC-S-nZVI) 有效地去除Cr (VI) 和酸红73. 这种新材料降低了污染物的毒性,并为废水整治提供了可持续的解决方案.

科学领域:

环境科学与工程环境科学与工程
材料科学材料科学材料科学
纳米技术纳米技术

背景情况:

纳米零价铁 (nZVI) 在环境应用中受到聚合,氧化和生物毒性的挑战.
同时去除重金属如CrVI和有机染料如酸红73 (AR73) 对于水处理至关重要.

研究的目的:

为了合成和评估生物炭支持的硫功能化nZVI (BC-S-nZVI) 以同时去除Cr (VI) 和AR73.
调查整治机制,并评估开发的复合材料的生态毒性.

主要方法:

生物炭支持的硫功能化nZVI (BC-S-nZVI) 的合成.
评价Cr (VI) 和AR73的去除效率,吸附动力学和异温物.
评估天然水样本中的材料稳定性和连续的柱子运行.
对水生生物和土壤微生物进行生态毒性测试.

主要成果:

在300分钟内,BC-S-nZVI实现了高清除效率:Cr (VI) 的99.9%,AR73的96.9%.
根据Langmuir和伪二阶模型,Cr (VI) 的最大吸附能力为87.3 mg/g,AR73的最大吸附能力为63.7 mg/g.
FeS_x层减轻了nZVI问题并提高了反应性,在432小时的连续运行中表现稳定.
BC-S-nZVI显著降低了生物毒性和污染物对水生和土壤生态系统的抑制作用.

结论:

BC-S-nZVI是一种有效且稳定的吸附剂,用于同时修复Cr(VI) 和AR73.
复合材料显示生态毒性降低,为废水和地下水处理提供了一个有希望的,环保的解决方案.

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