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结合电动力学补救与冲洗使用绿茶合成的纳米零价值铁/来补救Cr (VI)

Fang Zhu¹, Yue Yang², Wentao Ren²

¹College of Environmental Science and Engineering, Taiyuan University of Technology, Taiyuan, 030024, People's Republic of China. zhufang@tyut.edu.cn.

Environmental geochemistry and health

|October 9, 2023

概括

这项研究结合了冲洗和电动疗法,使用绿茶制造的纳米级零价值铁/ (GT-nZVI/Ni) 来去除六价值 (Cr (VI)). 该技术实现了高Cr (VI) 清除率,降低了土壤的毒性,并不会对植物造成伤害.

科学领域:

环境科学环境科学
材料科学材料科学材料科学
化学工程是化学工程的重要组成部分.

背景情况:

渣垃圾场由于六价 (Cr (VI)) 污染,造成了严重的环境风险.
传统的整治方法经常面临效率和成本效益方面的挑战.
开发可持续和有效的Cr (VI) 整治技术至关重要.

研究的目的:

研究一种新型冲洗电动力学修复 (EK) 技术的有效性,用于从受污染的土壤中去除Cr (VI).
评估绿茶制造的纳米级零价值铁/ (GT-nZVI/Ni) 作为联合修复过程中的化剂的性能.
为了优化修复参数,包括电压,电极间距和解质pH值.

主要方法:

采用了一种结合冲洗-电动力学补救方法.
绿茶制造的纳米级零价值铁/ (GT-nZVI/Ni) 被合成并用作化剂.
实验是在不同的电压,电极间距和解质pH值下进行的.
分析了Cr (VI) 清除效率,能源消耗和土壤特性.

主要成果:

联合冲洗-EK技术在120小时后实现了Cr (VI) 清除率在83.08%至96.97%之间.
在最佳条件下 (28V,pH值3,间隔15厘米) 得到了91.49%的Cr (VI) 去除,能量消耗为0.32606 kW·h·g−1.1.
补救机制包括电迁移,减少和吸附共同沉.
分割分析表明,Cr (VI) 转化为不太流动和有毒的状态.
毒性特征漏程序 (TCLP) 的结果低于1毫克·L-1,植物毒性测试显示发芽指数为54.75%.

结论:

GT-nZVI/Ni冲洗-EK技术是修复Cr (VI) 污染土壤的高效方法.
该过程显著降低了Cr (VI) 的流动性和毒性,符合环境标准.
该技术展示了一种有希望的,可持续的危险废物清理场所清理方法.

关键词:

(VI) 是一种电动力学电动力学电动力学冲洗冲洗是为了冲洗.绿茶提取物绿茶提取物机制机制机制纳米零价值铁/ (nZVI/Ni) 的使用

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