在石墨板上支的铁-兰坦,用于从水溶液中去除:动力学,热力学和生态毒性评估
Hongyu Sun1, Qiongli Bao1, Yutan Chu1
1Innovation Team of Toxicology and Pollution Remediation of Heavy Metal, Agro-Environmental Protection Institute, Ministry of Agriculture and Rural Affairs, Tianjin, 300191, China.
铁-La双金属改性石墨板有效地从水中去除 (III). 这种新材料显示了增强的吸附能力和降低对大米的毒性,表明了实际应用的潜力.
科学领域:
- 材料科学 材料科学 材料科学
- 环境化学环境化学
- 水处理 处理水的方法
背景情况:
- 基于石墨烯的材料是有效的去除由于高表面积.
- 水中的污染对环境和健康构成重大风险.
- 开发高效的吸附剂去除 (III) 对于净化水非常重要.
研究的目的:
- 为了合成和评估Fe-La双金属改性石墨板,以进行As (III) 去除.
- 调查新材料的吸附能力和机制.
- 评估大米上吸附剂的生态毒性.
主要方法:
- 合成Fe-La双金属修饰石墨板.
- 批量吸附实验以确定As (III) 的去除效率.
- 吸附异温和动力学研究.
- 描述分析 (例如BET,SEM,XPS).
- 对大米发芽和生长的生态毒性评估.
主要成果:
- 与未经修改的石墨板相比,Fe-La-石墨板表现出明显更大的表面积 (194.28 m2·g-1).
- 酸的吸附能力为51.69毫克·g-1,超过了石墨,La-石墨和Fe-石墨板.
- 吸附遵循弗洛伊德利希和杜比宁-拉杜什基维奇等热体,最大容量为53.62mg·g-1.1.
- 吸附机制包括氧化,连带交换,内球复合和静电吸引.
- 该材料对大米具有最小的生态毒性,并降低了As (III) 毒性.
结论:
- 铁-La双金属改性石墨板对于从水溶液中去除 (III) 是非常有效的.
- 增强的吸附性归因于协同效应和多种相互作用机制.
- 该材料表现出有利的环境特征,并且在污染水处理中具有实际应用性.
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